Dunkle, M.D., K.K. Bartz., S.M. Collins, P.W.C. Gabriel, J.D. Muehlbauer and S.R. Textor. 2024. Understanding climate change impacts on subarctic lakes: insights from long-term monitoring in Katmai and Lake Clark national parks, southwest Alaska. Associated Sciences of Limnology and Oceanography Annual Meeting, Madison, Wisconsin, 02-07 June 2024.
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June 2024
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Global climate change is having widespread, and often nuanced, impacts on aquatic ecosystems around the world, necessitating comprehensive understanding through long-term monitoring studies. Here, we present over a decade of monitoring which show substantial variation in critical water quality parameters. This work not only enhances our understanding of subarctic ecosystem dynamics but also serves as a valuable foundation for informing adaptive management strategies.
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Dunkle, M.D., K.K. Bartz., S.M. Collins, P.W.C. Gabriel, J.D. Muehlbauer and S.R. Textor. 2024. Understanding climate change impacts on subarctic lakes: insights from long-term monitoring in Katmai and Lake Clark national parks, southwest Alaska. Alaska Chapter American Fisheries Society Annual Meeting, Seward, Alaska, 25-29 March 2024.
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March 2024
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Global climate change is having widespread, and often nuanced, impacts on aquatic ecosystems around the world, necessitating comprehensive understanding through long-term monitoring studies. Here, we present over a decade of monitoring which show substantial variation in critical water quality parameters. This work not only enhances our understanding of subarctic ecosystem dynamics but also serves as a valuable foundation for informing adaptive management strategies.
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Zhuang, Q., X. Zhu, C. Prigent, J.M. Melillo, A.D. McGuire, R.G. Prinn, and D.W. Kicklighter. 2012. Influence of changes in wetland inundation extent on net fluxes of carbon dioxide and methane in northern latitudes from 1993 to 2004. Meeting of the American Geophysical Union, San Francisco, California.
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December 2012
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We conclude that the wetlands play a disproportional role in affecting regional greenhouse gas budgets and considering changes of their inundation extent is important to quantifying the budgets and their impacts on the climate system at northern high latitudes.
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Zhuang, Q., J. Tang, Y. Lu, X. Xiong, J. Melillo, R. Prinn, and A.D. McGuire. December 2009. Evaluating contributions of wetland and lake emissions of methane to atmospheric methane concentrations with models of biogeochemistry and atmospheric chemistry transport in northern high latitudes. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2009
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Zhuang, Q., J. Tang, Y. Lu, K. Xu, X. Xiong, J. Melillo, R. Prinn, and A.D. McGuire. May 2009. Evaluating contributions of wetland and lake emissions of methane to atmospheric methane concentrations with a process-based biogeochemistry model and an atmospheric chemistry transport model and satellite retrieval data in northern high latitudes. 2009. Spring Meeting of the American Geophysical Union, Toronto, Canada.
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May 2009
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Zhuang, Q., J. Tang, J. Melillo, M. Chen, Y. Jiang, D. Kicklighter, R. Prinn, and A.D. McGuire. September 2009. Constraining the uncertainty of carbon dynamics in North America using eddy flux measurements and satellite-based net primary production data. Eighth International Carbon Dioxide Conference, Jena, Germany.
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September 2009
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Zhuang, Q., J. S. Clein, A. D. McGuire, R. J. Dargaville, V. E. Romanovsky, J. Harden, D. W. Kicklighter, J. M. Melillo, J. E. Hobbie, and E. B. Rastetter. August 2002. Modeling the effects of soil thermal on the seasonality of carbon fluxes across northern temperate and high latitude regions. Annual Meeting, Ecological Society of America, Tucson, AZ.
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August 2002
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Zhuang, Q., J. S. Clein, A. D. McGuire, R. J. Dargaville, D. W. Kicklighter, J. M. Melillo, J. E. Hobbie, and E. B. Rastetter. December 2001. Modeling the effects of soil thermal dynamics on the seasonality of carbon fluxes across northern temperate and high latitude regions. Fall Meeting, American Geophysical Union, San Francisco, CA.
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December 2001
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Zhuang, Q., J. Melillo, J. Reilly, A.D. McGuire, R. Prinn, A. Shvikdenko, N. Tchebakova, A. Sirin, S. Maksyutov, A. Peregon, D. Kicklighter, E. Parfenova, and G. Zhou. April 2009. Changes of land cover and land use and greenhouse gas emissions in Northern Eurasia. Annual Meeting of the European Geophysical Union, Vienna, Austria.
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April 2009
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Zhuang, Q., J. Melillo, D. Kicklighter, R. Prinn, A. D. McGuire, P. Steudler, B. Felzer, and S. Hu. December 2003. Methane emissions from the terrestrial ecosystems of northern high latitudes during the 20th century: A retrospective analysis with a process-based biogeochemistry model. Fall Meeting, American Geophysical Society, San Francisco, CA.
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December 2003
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Zhuang, Q., J. Melillo, A. McGuire, D. Kicklighter, R. Prinn, P. Steudler, B. Felzer, and S. Hu. December 2004. Methane emissions and the greenhouse gas budget in Alaska for the past and 21st Centuries. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2004
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Zhuang, Q., J. M. Melillo, D. W. Kicklighter, R. G. Prinn, P. A. Steudler, A. D. McGuire, B. S. Felzer, and S. Hu. August 2003. Modeling methane consumption and emission between the terrestrial biosphere and the atmosphere. Ecological Society of American Annual Meeting, Savannah, Georgia.
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August 2003
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Zhuang, Q., J. M. Melillo, D. W. Kicklighter, B. S. Felzer, A. Sokolov, R. G. Prinn, A. D. McGuire, P. A. Steudler, and S. Hu. May 2004. The relationship of global warming potentials to methane and carbon dioxide exchanges in northern high latitudes estimated with a process-based biogeochemistry model. 12th Conference of the International Boreal Forest Research Association, Fairbanks, AK. Invited.
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May 2004
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Zhuang, Q., J. M. Melillo, D. W. Kicklighter, B. S. Felzer, A. D. McGuire, A. Sokolov, R. G. Prinn, P. A. Steudler, and S. Hu. August 2004. The global warming potential budget of net methane and carbon dioxide exchanges in northern high latitudes. Annual Meeting, Ecological Society of America, Portland, OR.
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August 2004
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Zhuang, Q., J. M. Melillo, B. S. Felzer, D. W. Kicklighter, A. D. McGuire, and R. G. Prinn. August 2006. A modelling analysis of impact of fire disturbances on net carbon exchanges in boreal terrestrial ecosystems. Ninety-first Annual Meeting, Ecological Society of America, Memphis, TN.
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August 2006
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Zhuang, Q., J. M. Melillo, B. S. Felzer, D. W. Kicklighter, A. D. McGuire, A. Sokolov, R. G. Prinn, M. C. Sarofim, P. A. Steudler, and S. Hu. August 2005. Modelling CH4 and CO2 fluxes in northern high latitudes under contemporary climate conditions. Annual Meeting of the Ecological Society of America, Montreal, Canada.
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August 2005
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Zhuang, Q., J. M. Melillo, A. D. McGuire, R. J. Dargaville, D. W. Kicklighter, J. S. Clein, R. B. Myneni, J. Dong, V. E. Romanovsky, J. Harden, and J. E. Hobbie. December 2002. Effects of soil thermal dynamics on carbon cycling in extratropical terrestrial ecosystems of the Northern Hemisphere. Fall Meeting, American Geophysical Union, San Francisco, California.
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December 2002
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Zhuang, Q., A. D. McGuire, J. Harden, K. P. O'Neill, and J. Yarie. December 2000. Modeling the carbon dynamics of a fire chronosequence in interior Alaska. American Geophysical Union Fall Meeting, San Francisco.
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December 2000
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Zhuang, Q., A. D. McGuire, J. Harden, K. P. O'Neill, V. E. Romanovsky, and J. Yarie. 2001. Modeling the carbon dynamics of a fire chronosequence in interior Alaska. Ecological Society of America Annual Meeting, Madison, Wisconsin.
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August 2001
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Zhu, Z., A.D. McGuire, H. Genet, P. Selmants, and B. 2017. Carbon balance of boreal and arctic Alaska and tropical Hawaii ecosystems. The 10th International Carbon Dioxide Conference, Interlaken, Switzerland. Poster Presentation.
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August 2017
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United States Geological Survey (USGS) recently completed two regional carbon assessments: Alaska and Hawaii, using remote sensing, simulation modeling, and data collected in the field as the primary methods. This poster provides primary findings of the regional assessments.
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Zhang, Y., H. Genet, A.D. McGuire, W.R. Bolton, V. Romanovsky, G. Grosse, and T. Jorgenson. 2013. Modeling thermokarst dynamics in Alaskan ecosystems. 16th International Boreal Forest Research Association Conference, Edmonton, Alberta, Canada.
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October 2013
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The model tracks thermokarst disturbance and associated vegetation transitions at 1km*1km resolution, and has been designed to be integrated into the Alaska Integrated Ecosystem Model for Alaska and Northwest Canada (AIEM), which includes coupled models of fire disturbance, soil thermal dynamics, and ecosystem structure and function.
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Zhang, Y., A.D. McGuire, H. Genet, W.R. Bolton, V.E. Romanovsky, G. Grosse, T. Jorgenson, and M. Lara. 2013. Modeling thermokarst dynamics in Alaska ecosystems: Description of the Predisposition and Initiation/Expansion sub-models. Meeting of the American Geophysical Union, San Francisco, California.
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December 2013
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The Alaska Thermokarst Model (ATM) is a state-and-transition model that is being developed to predict thermokarst disturbance in response to climate warming. The ATM model has been designed to be integrated into the Alaska Integrated Ecosystem Model (AIEM), which includes coupled models of fire disturbance, soil thermal dynamics, and ecosystem structure and function at 1km*1km resolution. The initial application of the ATM in a test area located within the Alaskan boreal forest ecosystem is pre
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Zhang, Y. A.D. McGuire, H. Genet, W.R. Bolton, V.E. Romanovsky, G. Grosse, M.T. Jorgenson. 2012. Modeling thermokarst dynamics in Alaska ecosystems. Meeting of the American Geophysical Union, San Francisco, California.
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December 2012
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The model tracks thermokarst disturbance and associated vegetation transitions at 1km*1km resolution, and has been designed to be integrated in the Alaska Integrated Ecosystem Model (AIEM), which includes coupled models of fire disturbance, soil thermal dynamics, and ecosystem structure and function.
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Zhang, X., A. D. McGuire, and R. W. Ruess. December 2000. Maintenance respiration of black spruce ecosystems in Alaska: Implications for spatial and temporal scaling. American Geophysical Research Union Fall Meeting, San Francisco.
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December 2000
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Yujin Zhang, Helene Genet, Mark Lara, A. Dave McGuire, Jennifer Roach, Vijay Patil, Vladimir Romanovsky, Bob Bolton and Ruth Rutter. An Assessment of Thermokarst Driven Changes in Land Cover of the Tanana Flats wetland complex of Alaska from 2009-2100 in response to climate warming. AGU 2014 Fall Meeting.
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December 2014
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In this study, we applied the ATM in a large wetland complex in Interior Alaska (the Tanana Flats) to predict changes in landcover associated to thermokarst from 2009 to 2100. Preliminary simulations over a 10 km x 10 km area of the Tanana Flats suggests that permafrost plateau forests will decrease by 34.9% and collapse scar fens and bogs will increase by 88.3% in this region. After further testing and refinement of the ATM, a next step will be to couple the ATM with a process-based ecosystem
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Yuan, F., S. Yi, A.D. McGuire, K.D. Johnson, J. Liang, J. Harden, and E.S. Kasischke. February 2011. Dynamical basin-scale responses of taiga forest and soil C stocks to climate changes and wild fire history in the Yukon River Basin during the last century. Third North American Carbon All-Investigators Meeting, New Orleans, LA.
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February 2011
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Yuan, F., S. Yi, A.D. McGuire, K.D. Johnson, J. Liang, E. Kasischke, and J. Harden. December 2009. Multiple site evaluation of a dynamic organic soil model for analyzing carbon responses of terrestrial ecosystems to climate change and fire disturbance in interior Alaska. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2009
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Yuan, F., P.E. Thornton, A.D. McGuire, W.C. Oechel, B. Yang, C.E. Tweedie, A. Rogers, and R.J. Norby. 2013. The role of explicitly modelling bryophytes in simulating carbon exchange and permafrost dynamics of an arctic coastal tundra at Barrow, Alaska. Fall Meeting of the American Geophysical Union, San Francisco, California.
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December 2013
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This study explicitly represents the effects of bryophyte function and structure on the exchange of carbon (e.g., summer photosynthesis effects) and energy (e.g., summer insulation effects) with the atmosphere in the Community Land Model (CLM-CN model). Overall, our evaluation indicates that bryophytes are important contributors to land-atmospheric C exchanges in Arctic tundra and that they play an important to permafrost thermal and hydrological processes which are critical to permafrost stab
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Yuan, F., A.D. McGuire, S. Yi, E.S. Euskirchen, T.S. Rupp, A.L. Breen, T. Kurkowski, E.S. Kasischke, and J.W. Harden. December 2011. Effects of future warming and fire regime change on boreal soil organic horizons and permafrost dynamics in interior Alaska. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2011
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Yi, Shuhua, A. D. McGuire, J. Harden, and E. Kasischke. September 2007. A dynamic soil layer model for assessing the effects of wildfire on high latitude terrestrial ecosystem dynamics. AAAS Arctic Division Meeting, Anchorage, AK.
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September 2007
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Yi, S., A.D. McGuire, E. Kasischke, J. Harden, and K. Manies. December 2008. Simulating the effects of wildfire on permafrost and soil carbon dynamics over the Yukon River Basin using the Terrestrial Ecosystem Model. Fall Meeting of the American Geophysical Union, San Francisco, California.
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December 2008
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Yi, S., A. D. McGuire, and J. Harden. June 2008. Simulating the effects of wildfire on permafrost and soil carbon dynamics of black spruce over the Yukon River Basin using a terrestrial ecosystem model. Ninth International Conference on Permafrost, University of Alaska Fairbanks, Fairbanks, Alaska.
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June 2008
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Yi, S., A. D. McGuire, J. Harden, E. Kasischke, K. Manies, L. Hinzman, A. Liljedahl, V. Romanovsky, and S. Marchenko. December 2007. A dynamic soil layer model for assessing the effects of wildfire on high latitude terrestrial ecosystems. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2007
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Wullschleger, S.D., L.D. Hinzman, A.D. McGuire, S.F. Oberbauer, W.C. Oechel, R.J. Norby, P.E. Thornton, E.A. Schuur, H.H. Shugart, J.E. Walsh, and C.J. Wilson. December 2010. Climate change experiments in Arctic ecosystems: Scientific strategy and design criteria. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2010
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Woodall, C.W., S.M. Ogle, A.D. McGuire, H.E. Anderson, J.A. Smith, R. Pattison, G.M. Domke, and S.S. Saatchi. 2015. National Greenhouse Gas Inventories in Boreal Forests: The US Experience in Interior Alaska. International Boreal Forest Research Association Meeting, Rovenemi, Finland.
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May 2015
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The goal of this study was to determine the extent and carbon attributes of managed forest in interior AK as an initial step towards future full accounting of this boreal landscape. Preliminary results suggest that these forests may represent over a third of all forest carbon in the coterminous US, hence the assessment of their carbon balance is critical the monitoring of the US terrestrial carbon sink.
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Wolfe, S. A., B. Griffith, R. D. Cameron, and R. G. White. September 2001. Habitat selection by caribou of the Central Arctic Herd: Shifts in distribution and habitat quality. Eighth Annual Conference, The Wildlife Society, Reno/Tahoe, NV.
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September 2001
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Wipfli, MS, K Heim, J McFarland, S Laske, M Whitman. 2015. How Important are Prey Subsidies for Fishes in Arctic Freshwater Ecosystems? American Fisheries Society national conference. Portland, OR
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August 2015
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We’ve undertaken a series of studies on the Arctic Coastal Plain of Alaska that aim to identify the major trophic pathways, and relative importance of resource subsidies for Arctic Grayling, one of the most abundant freshwater salmonids on the Arctic. Aquatic and terrestrial invertebrates are key prey for small grayling and stickleback for large grayling, in small, shallow summer foraging habitats.
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Wipfli, M.S., and C.V. Baxter. May 2010. Managing salmon returns and riparian forests to benefit salmonids and their riverine habitats: Seeing the unseen. International Symposium: Advances in the Population Ecology of Stream Salmonids, Luarca, Asturias, Spain. (APESS abstract)
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May 2010
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Wipfli, M.S., N.F. Hughes, M.J. Evenson, E.R. Benson, E.C. Green, L. Gutierrez, J.R. Neuswanger, and M.T. Perry. November 2010. Environmental processes affecting juvenile Chinook salmon in the Chena River, interior Alaska. Annual Meeting, Alaska Chapter, American Fisheries Society, Juneau, AK.
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November 2010
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Wipfli, M.S., N.F. Hughes, M.J. Evenson, E.R. Benson, E.C. Green, L. Gutierrez, J.R. Neuswanger, and M.T. Perry. May 2010. Environmental processes affecting juvenile Chinook salmon in an interior Alaska river. International Symposium: Advances in the Population Ecology of Stream Salmonids, Luarca, Asturias, Spain. (APESS abstract)
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May 2010
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Wipfli, M.S., N.F. Hughes, M. Evenson, E.R. Benson, E.C. Green, L. Gutierrez, J.D. Neuswanger, M.T. Perry. 2008. Ecology and demographics of juvenile Chinook salmon in the Chena River, central Alaska. American Fisheries Society Alaska Chapter annual meeting, Anchorage, AK, 27-30 October.
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October 2008
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Wipfli, M.S., E. Green, C. Binckley, R. Medhurst, C. Mellon. September 2009. Headwater stream productivity: Why does it range so broadly? Special Symposium on Headwater Streams. American Fisheries Society annual meeting, Nashville, TN. (AFS abstract)
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September 2009
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Wipfli, M.S., D. Rinella, and P. Joy. 2013. Nutrient amendments vs salmon runs: What are we trying to accomplish and are we seeing the bigger picture? American Fisheries Society Western Division annual meeting, Boise, ID, Apr.
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April 2013
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Wipfli, M.S., A.M. Marcarelli, K.L. Kavanagh, G. Servheen, S.F. Collins, L.A. Felicetti, S.T. Florin, C.V. Baxter, and T. Wheeler. August 2010. Mitigating for the loss of marine nutrients from salmon: Ecological effects of salmon carcass and analog additions to headwater aquatic and terrestrial systems. Ecological Society of America annual meeting, Pittsburg, PA. (ESA abstract)
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August 2010
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Wipfli, M.S. 2008. How will climate change affect trophic processes and productivity in freshwater-riparian ecosystems? USFWS WildREACH Climate Change Workshop, Fairbanks, AK, 17-19 November.
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November 2008
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Wipfli, M.S. 2008. How important are fishless headwaters to downstream fishes and food webs? American Fisheries Society national meeting, Ottawa, Ontario, Canada, 18-21 August.
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August 2008
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Wipfli, M.S. 2007. Food resources regulating salmonid populations in fresh water: Variability through time and space. Arctic-Yukon-Kuskokwim Sustainable Salmon Initiative symposium, Anchorage, AK, February.
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February 2007
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Wipfli, M.S. 2006. Predicting climate change effects on freshwater foodwebs. Special Session, Climate change and Alaska fisheries. American Fisheries Society Alaska Chapter annual meeting, Fairbanks, AK, November.
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November 2006
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Wipfli, M.S. 2006. Marine-derived nutrients in stream ecosystems: The value of setting ecological escapement goals. Special Session, Marine-Derived Nutrients in Alaskan Ecosystems. American Fisheries Society Alaska Chapter annual meeting, Fairbanks, AK, November.
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November 2006
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Wipfli, M.S. 2005. Spatial subsidies in riverine food webs: consequences of disturbance and environmental change for stream fishes in Alaska and the Pacific Northwest. American Geophysical Union / North American Benthological Society joint assembly conference. New Orleans, LA.
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May 2005
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Wipfli, M.S. 2005. Predicted influence of environmental change on nutrient and energy flow in salmonid food webs in Alaska and the Pacific Northwest. American Fisheries Society annual meeting, Anchorage, AK.
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September 2005
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Wipfli, M.S. 2004. Prey and nutrient subsidies in salmonid food webs: implications for fish and forest management in Alaska. American Fisheries Society-Alaska Chapter annual meeting, Sitka, AK.
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November 2004
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Wipfli, M.S. Rivers to Oceans: Changing Fisheries. Indigenous Peoples Climate Change Workshop. Fairbanks, AK. Feb 16-18, 2016.
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February 2016
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Discussed how ecosystems are changing and affecting salmon fisheries in Alaska.
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Wipfli, M.S, and B. Lewis. 2012. Marine nutrients and nutrient supplements: ecological effects in streams. American Fisheries Society Alaska Chapter meeting, Kodiak, AK, 24-26 Oct.
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October 2013
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Wipfli, M., A.E. Kohler, B. Lewis, and G. Servheen. September 2011. Marine-derived nutrients and nutrient loss mitigation: Where we've been and where we might be headed. Annual Meeting, American Fisheries Society, Seattle, WA.
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September 2011
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Wipfli, M. September 2011. Riparian forest conditions influence food supplies for stream salmonids: Managing for increased aquatic productivity. Annual Meeting, American Fisheries Society, Seattle, WA.
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September 2011
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Wipfli, M. S. 2004. Prey and detritus subsidies in riverine ecosystems: a watershed perspective of marine, terrestrial, and headwater inputs for fish-bearing food webs in coastal Alaska. Special Session, New Directions in Food Web Analysis. North American Benthological Society annual meeting, Vancouver, Canada.
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June 2004
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Wipfli, M. S. 2004. Food versus habitat: understanding the significance of food and nutrient subsidies in salmonid food webs. Special Session, Food Webs and Fish Carrying Capacity. Western Division American Fisheries Society annual meeting, Salt Lake City, UT.
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March 2004
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Wipfli, M. Patterns of Food Web Responses to Marine Nutrients in Stream Ecosystems. Western Division of the American Fisheries Society annual conference, Anchorage, Alaska, May 2018.
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May 2018
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Paper summarizes two decades of science findings on the ecological effects of marine nutrients in stream food webs and fishes. Results have consistently shown large increases in macroinvertebrate and fish growth, body size and condition, density, omega-3 fatty acids, energy reserves and adult returns of salmon in riverine systems that receive adult salmon returns.
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Wipfli, M, K. Heim, J. McFarland, S. Laske, M. Whitman. 2015. Arctic Grayling Movement and Foraging Ecology in Arctic Alaska. Advances in the Population Ecology of Salmonids, Girona, Spain, May 25-29.
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May 2015
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Work is a synopsis of several studies on the Arctic Coastal Plain of Alaska that investigated freshwater foodwebs and the processes that control productivity. We found that Arctic Grayling migrate into summer foraging habitats to feed on abundance aquatic and terrestrial invertebrates, and stickleback between ice-out and ice formation in early and late summer.
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Wipfli, M, J McFarland, K Heim, K Gurney, S Laske, M Whitmann, C Arp, J Adams, J Koch. 2014. Freshwater food web processes on the Arctic Coastal Plain, Alaska: Vulnerabilities in a changing environment. Joint Aquatic Sciences Meeting. Portland, OR.
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May 2014
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Talk summarized how food webs function on the Arctic Coastal Plain, Alaska.
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Wipfli, M, E Schoen, B Meyer. 2017. Variation in Resource Subsidies Along Ecological and Latitudinal Gradients in Alaska. American Fisheries Society annual meeting, Tampa, FL.
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August 2017
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Talk summarizes the resource subsidy patterns we've documented in streams in Alaska. Results show ecological and latitudinal patterns in the magnitude of marine and terrestrial subsidies entering salmonid streams.
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Wipfli, M, E Schoen, B Meyer, S Laske, P Joy. 2017. Can we manage resource subsidies and food webs to benefit fishes and fisheries? WDAFS, Missoula, MT
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May 2017
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Talk is an overview of resources subsidies and their influence on salmon, and the environmental gradients that govern them. Work also highlights the role resource management can play in affecting subsidies through riparian and fisheries management.
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Wilson, H.W., T. L. Moran, P. L. Flint, and A. N. Powell. 2003. Survival and reproduction of Pacific Common Eiders on the Yukon-Kuskokwim Delta, Alaska, Pacific Seabird Group, Victoria, Canada.
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February 2003
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Wilson, H.M., P. L. Flint, C. L. Moran, and A. N. Powell. 2006. Survival of breeding Pacific common eiders. 25 September, 13th Annual Conference of The Wildlife Society, Anchorage, AK.
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September 2006
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Wilson, H.M., A.N. Powell , P.L. Flint, and F. Broerman. 2003. Ecology of Pacific common eiders on the Yukon-Kuskokwim Delta, Alaska: Effects of contaminants on reproductive performance. Oral Presentation. 3rd North American Duck Symposium, Sacramento, California, 7 November 2003.
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November 2003
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Wilson, H., P. L. Flint, and A. N. Powell. 2006. Lead and selenium in breeding Pacific common eiders on the Yukon-Kuskokwim Delta, Alaska. 18 February, Pacific Seabird Group, Girdwood, AK.
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February 2006
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Wilson, H., A. N. Powell, P. Flint, and T. Moran. 2005. Population dynamics of Pacific common eiders on the Yukon-Kuskokwim Delta, Alaska. Second North American Sea Duck Conference, Annapolis, MD.
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November 2005
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Wilson, H. M., T. L. Moran, P.L. Flint, and A. N. Powell. 2005. Productivity of Pacific Common Eiders on the Yukon-Kuskokwim Delta, Alaska. Annual Meeting, Pacific Seabird Group/Waterbird Society Meeting, 19-23 January, Portland, OR.
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January 2005
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Wilson, H. M., T. L. Moran, P.L. Flint, and A. N. Powell. 2002. Breeding biology of common eiders on the Yukon-Kuskokwim Delta, Alaska. Poster; North American Sea Duck Conference, 6-10 November 2002, Victoria, B.C.
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November 2002
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Wilson, H. M., P. L. Flint, C. L. Moran, and A. N. Powell. 2006. Ecological effects of trace elements: spatio-temporal variability and demographic implications for Pacific Common Eiders. 4 October, IV North American Ornithological Conference, Veracruz, Mexico.
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October 2006
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Wilson, H. M. and A. N. Powell. 2004. Selenium in Alaskan eiders: patterns and consequences of exposure. 16 March 2004, Alaska Bird Conference, Anchorage.
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March 2004
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Wilson, E.E., J.D. Muehlbauer, F.J. Dekker, K.D. Keith, A.L. LaBarre, and M.G. Mazzacavallo. 2023. Effects of Watercraft Wakes on Shoreline Erosion, and Potential Impacts for Salmon at Big Lake, Alaska. Mat-Su Salmon Science & Conservation Symposium, Palmer, Alaska, 13-14 November 2023.
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November 2023
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This poster describes pilot work, and planned future work, aimed at understanding the impact of boat wakes on erosion at Big Lake, AK and the potential consequences for key salmon habitat.
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Wilson, E.E., J.D. Muehlbauer, F.J. Dekker, K.D. Keith, A.L. LaBarre and M.G. Mazzacavallo. 2024. Effects of watercraft wakes on shoreline erosion, and potential impacts for salmon at Big Lake, Alaska. Alaska Chapter American Fisheries Society Annual Meeting, Seward, Alaska, 25-29 March 2024.
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March 2024
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This poster describes pilot work, and planned future work, aimed at understanding the impact of boat wakes on erosion at Big Lake, AK and the potential consequences for key salmon habitat.
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Wilson, E.E., J.D. Muehlbauer, F.J. Dekker, K.D. Keith, A.L. LaBarre and M.G. Mazzacavallo. 2024. Effects of Watercraft Wakes on Shoreline Erosion, and Potential Impacts for Salmon at Big Lake, Alaska. Alaska Section American Water Resources Association Annual Conference, Fairbanks, Alaska, 1-3 April 2024.
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April 2024
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This poster describes pilot work, and planned future work, aimed at understanding the impact of boat wakes on erosion at Big Lake, AK and the potential consequences for key salmon habitat.
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Wilson, E.E., J.D. Muehlbauer 2024. Effects of watercraft wakes on shoreline erosion, and potential impacts for salmon at Big Lake, Alaska. Mat-Su Salmon Science and Conservation Symposium, Palmer, Alaska, 18-19 November 2024.
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November 2024
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This talk will describe work conducted over the past year aimed at understanding the impact of boat wakes on erosion at Big Lake, AK and the potential consequences for key salmon habitat.
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Wild, T., S. Kendall, and A. N. Powell. 2012. How many Smith's Longspurs are in Alaska's Brooks Range?: Estimating breeding density of a polygynandrous species. 25 October. 15th Annual Alaska Bird Conference, Anchorage, AK.
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October 2012
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Wild, T., S. Kendall, N. Guldager, and A. Powell. 2011. Breeding Smith's Longspur habitat associatations and predicted distribution in the Brooks Range, Alaska. 11 March, AFO/COS/WOS Joint Conference, Kearney, NE.
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March 2011
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Wild, T. L., S. Kendall, F. Huettmann, C. Villa, and A. N. Powell. 2009. Smith’s longspur density and distribution in Alaska’s Brooks Range. Poster, 16th Wildlife Society Conference, Monterey, CA.
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September 2009
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White, R.G., D.E. Russell, B. Griffith, and R.D. Cameron. June 2009. Effect of maternal body condition and nutrient intake on milk production of caribou and reindeer. American Society of Mammalogists Annual Meeting, Fairbanks, AK.
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June 2009
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White, R.G., D.E. Russell, A. Gunn, B. Griffith, G.P. Kofinas, S. Kutz, J. Mameamskum, R. Ashenfelter, C. Daniel, and C. Nicolson. May 2010. Involvement of the CARMA network in analysis, synthesis, and managementof Arctic caribou and reindeer populations. International Polar Year Conference, Oslo, Norway.
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May 2010
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White, R.G., B. Griffith, D.E. Russell, A. Gunn, and C. Daniel. June 2010. Importance of maternal fat reserves to variation in the energy-protein mismatch of food resources for post-calving caribou. Comparative Nutrition Society Conference, Tucson, AZ.
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June 2010
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White, R., D. Russell, K. Gerhart, B. Griffith and A. Gunn. 2015. Milk composition: Is it a tool to assess weaning strategies in relation to milk production and plane of nutrition? 14th Arctic Ungulate Conference, Roros, Norway, 17-21 August 2015.
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August 2015
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This study estimates milk nutrient content for caribou in summer and November. Nutrient outputs at each sampling are then related to maternal body condition at each sampling to understand how body reserves can affect weaning strategies.
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White, K., R. C. Lonsinger, S. M. Crimmins, E. M. Anderson, and T. M. LIvieri. 2021. Fine-scale space use by swift foxes on a black-footed ferret recovery site. Swift Fox Conservation Team Meeting.
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May 2021
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Swift foxes have been implicated as a potential driver of declining populations of endangered black-footed ferrets. We used camera-based monitoring and occupancy analyses to better understand spatial patterns of swift foxes use on a black-ferret recovery site in western Kansas.
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Westley, P., Lopez, A., Jalbert, C., and J. Falke. 2016. Towards an understanding of population structure and adaptation by invasive northern pike: An overview of an emerging research program
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November 2016
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The northern pike invasion to Southcentral Alaska simultaneously represents a pressing conservation crisis and opportunity to learn about about the ecology and evolution of the invaders in novel environments. Here we give a brief overview of a series of recently initiated complementary projects to better understand population structure and adaptation by invasive northern pike.
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Wertz, T. L., S. M. Arthur, D. Cooley, B. Griffith, and M. Kienzler. September 2006. Seasonal survival of the Porcupine Caribou Herd in Alaska and northern Yukon Territory, 2003-2006. Session 35, The Wildlife Society 2006 Annual Meeting, Anchorage, AK.
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September 2006
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Wells, J., S. Crimmins, T. Bentzen, J. Gross, and T. Brinkman. 2023. Effects of hunting risk on the spatial dynamics of a subarctic caribou population. North American Caribou Workshop and Arctic Ungulate Conference, Anchorage, AK.
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May 2023
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We used a long-term satellite telemetry dataset to quantify the impacts of habitat and hunting pressure on caribou movements and behavior
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Weiser, E. and A.N. Powell. 2008. Diet of glaucous gulls breeding at two locations on Alaska's north slope. Poster, 13th Alaska Bird Conference.
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March 2008
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Weiser, E. and A. Powell. 2009. Does garbage make more glaucous gulls? Poster, 79th Cooper Ornithological Society Conference, Tucson, AZ.
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April 2009
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Weiser, E. and A. N. Powell. 2010. Using stable isotope analysis to evaluate biases in conventional diet samples. Poster, COS/AOU/SCO Joint Annual Meeting, San Diego, CA.
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February 2010
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Weiser, E. and A. N. Powell. 2010. Garbage makes more glaucous gulls. COS/AOU/SCO Joint Annual Meeting, San Diego, CA.
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February 2010
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Weiser, E. and A. N. Powell. 2009. Garbage makes more glaucous gulls. 33rd Waterbird Society Conference, Cape May, NJ.
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November 2009
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Weiser, E. and A. N. Powell. 2008. Effects of changes in garbage management on glaucous gull diet at Barrow, Alaska. 6 November, 32nd Waterbird Society meeting, South Padre Island, Texas.
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November 2008
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Weiser, E. L. and A. N. Powell. 2010. Garbage makes more Glaucous Gulls. Pacific Seabird Group, 37th Annual Conference, Long Beach, California
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February 2010
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Weiser, E. L. and A. N. Powell. 2010. Using stable isotopes to evaluate biases in conventional diet samples. Pacific Seabird Group, 37th Annual Conference, Long Beach, California
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February 2010
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Ward, N., A.J. Lynch, K. Bouska, H. Embke, J. Kocik, T. Krabbenhoft, D. Lawrence, M. Magee, B.M. Maitland, J. Morton, J.D. Muehlbauer, R. Newman, H.M. Rantala, G.G. Sass, A. Schulz and J. Wilkening. 2022. Using the Resist-Accept-Direct (RAD) framework to reimagine large river management. American Fisheries Society Annual Meeting, American Fisheries Society, Spokane, Washington, 21-25 August 2022.
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August 2022
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This presentation explores how the Resist-Adapt-Direct framework can be used to structure large river management decisions. It focuses specifically on the Mississippi River system.
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Wang, W., A. Rinke, J.C. Moore, X. Cui, D. Ji, Q. Li, N. Zhang, C. Wang, S. Zhang, D.M. Lawrence, A.D. McGuire, W. Zhang, C. Delire, C. Koven, K. Saito, A. MacDougall, E. Burke, and B. Decharme. 2016. Diagnostic and model dependent uncertainty of simulated Tibetan permafrost area. Eleventh International Conference on Permafrost. Potsdam, Germany. Poster Presentation.
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June 2016
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We perform a land surface model intercomparison to investigate how the simulation of permafrost area on the Tibetan Plateau (TP) varies among 6 modern stand-alone land surface models (CLM4.5, CoLM, ISBA, JULES, LPJ-GUESS, UVic). Although models can produce better permafrost maps using mean annual ground temperature and surface frost index, analysis of simulated soil temperature profiles reveals substantial biases. The current generation of land surface models need to reduce biases in simulated
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Walvoord, M., R. Striegl, G. Aiken, M. Dornblaser, S. Ewing, B. Griffith, J. Koch, J. Schmutz, P. Schuster, R. L. Smith, C. Voss, and K. Wickland. March 2010. Climate change and water in interior Alaska: An overview of hydrologic, aquatic biogeochemical, and biodiversity studies in the Yukon River Basin. USGS Global Change Conference, Denver, CO.
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March 2010
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Walsh, J. E., C. Elfring, C. J. Vorosmarty, and A. D. McGuire. December 2001. Enhancing NASA's contribution to arctic terrestrial hydrology and the study of polar change. Fall Meeting, American Geophysical Union, San Francisco, CA.
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December 2001
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Walker, C., D.J. Rinella, M.S. Wipfli, and C.A. Stricker. 2005. Tracking marine-derived nutrients in Alaska watersheds. State of the Salmon Conference. Anchorage, AK.
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April 2005
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Waldrop, M.P., J.W. Harden, M.R. Turetsky, D.G. Peterson, A.D. McGuire, M.J. Briones, A.C. Churchill, D.H. Doctor, and L.E. Pruett. December 2010. Relationships between soil microbial communities and soil carbon turnover along a vegetation and moisture gradient in interior Alaska. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2010
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Waldrop, M.P., J. McFarland, E.S. Euskirchen, M.R. Turetsky, J.W. Harden, K. Manies, M. Jones, and A.D. McGuire. 2012. Carbon balance and greenhouse gas fluxes in a thermokarst bog in interior Alaska: Positive and negative feedbacks from permafrost thaw. Meeting of the American Geophysical Union, San Francisco, California.
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December 2012
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These data will be used to quantify the extent to which CH4 production in the bog may reduce any potential negative climate feedback.
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Waldrop, M.P., J. McFarland, C.I. Czimczik, E.S. Euskirchen, T. Amendolara, G.J. Scott, M.R. Turetsky, J.W. Harden, and A.D. McGuire. December 2011. Changing sources of respiration between a black spruce forest and themokarst bog. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2011
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Waldrop, M., J. McFarland, E. Euskirchen, M. Turetsky, J. Harden, K. Manies, M. Jones, and A.D. McGuire. 2013. CO2 and CH4 fluxes and net C storage following permafrost thaw in interior Alaska. Fourth North America Carbon Program All Investigators Meeting, Albuquerque, New Mexico.
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February 2013
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The data and understanding from these measurements will be incorporated into a peatland biogeochemistry model to assess the response of lowland black spruce in Interior Alaska to thawing permafrost caused by climate change.
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W.R. Boloton, A.L. Breen, A.D. McGuire, T.S. Rupp, E. Euskirchen, S. Marchenko, V. E. Romanovsky, and the IEM Team. 2016. The Integrated Ecosystem Model for Alaska and Northwest Canada: An interdisciplinary decision support tool to inform adaptation to Arctic environmental change. The Ecosystem Approach to Management International Conference. Fairbanks, Alaska. Oral Presentation.
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August 2016
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Together, these three models comprise the Integrated Ecosystem Model (IEM) for Alaska and Northwest Canada. We will present our progress to date, anticipated model projections of landscape structure and function that will inform adaptation to Arctic environmental change, and results from our work to improve the tundra fire and vegetation dynamics component of the IEM.
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W. Robert Bolton, Vladimir Romanovsky, A. David McGuire, G. Grosse, and M. Lara. Initial Conceptualization and Simulation of Arctic Tundra Landscape Evolution Using the Alaska Thermokarst Model. AGU 2014 Fall Meeting.
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December 2014
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In this study, we present our conceptualization and initial results from the ATM model in the area around Barrow, Alaska. The area selected for simulation is located in a polygonal tundra landscape with varying degrees of thermokarst degradation. The goal of this modeling study is to simulate landscape evolution in response to thermokarst disturbance as a result of climate change. The long-term goal is to incorporate the ATM into the Integrated Ecosystem Model (IEM) for Alaska and Northwest
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Vorosmarty, C.J., A.D. McGuire, E. Rastetter, J. Hobbie, K. Farrow, and L. Hinzman. November 2008. The United States Arctic Research Commission Scaling Study. First International Symposium on Arctic Research. Tokyo, Japan. Invited.
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November 2008
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Turetsky, M.R., M.R. Chivers, J.M. Waddington, J.W. Harden, and A.D. McGuire. May 2009. Climatic and vegetation controls on peatland CO2 fluxes in Alaska: Early response to ecosystem-scale drought and soil warming manipulations. Spring Meeting of the American Geophysical Union, Toronto, Canada.
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May 2009
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Turetsky, M.R., EAG. Schuur, C. Schadel, A.D. McGuire, D. Olefeldt, and G. Hugelius. 2015. Recent synthesis of research on the permafrost carbon feedback. 68th Canadian Geotechnical Conference and 7th Canadian Permafrost Conference. Oral Presentation.
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September 2015
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Permafrost thaw, and carbon released via the microbial decomposition of previously frozen soil organic matter, is considered one of the most likely positive feedbacks from terrestrial ecosystems to the atmosphere in a warmer world. The rate and form of permafrost carbon release is highly uncertain but crucial for predicting the strength and timing of this carbon cycle feedback during this century and beyond. The main objective of the Permafrost Carbon Network is to use data synthesis and model
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Turetsky, M.R., D. Olefeldt, and A.D. McGuire. 2015. Pan-arctic trends in lake and wetland thermokarst: Implications for carbon storage and methane fluxes. Goldschmidt 2015 Conference. Prague. Oral Presentation.
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August 2015
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We are using pan-arctic mapping of spatial data known to predispose landscapes to thermokarst along with land cover change studies to better understand the relevance of abrupt thaw to the overall permafrost C feedback. We estimate that thermokarst terrains cover 3.6 x 106 km2, or 20% of the northern permafrost domain.
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Turetsky, M., J. Harden, A. D. McGuire, and M. Waddington. December 2007. Controls on feedbacks between northern wetlands and the climate system. Fall Meeting of the American Geophysical Union, San Francisco, CA. Invited.
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December 2007
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Turetsky, M., J. Harden, A. D. McGuire and E. Kasischke. August 2005. Altered hydrology in boreal peatlands: Pervasive drought and the erosion of carbon stocks in high latitudes. Annual Meeting of the Ecological Society of America, Montreal, Canada.
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August 2005
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Turetsky, M., A.D. McGuire, and D. Olefeldt. 2016. Upscaling permafrost carbon loss from thermokarst and thermal erosion across the northern permafrost domain. Eleventh International Conference on Permafrost. Potsdam, Germany. Poster Presentation.
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June 2016
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The main objective of this work is to explore how the potential magnitude of permafrost carbon losses resulting from thermokarst compares to carbon losses triggered by the slow gradual deepening of the seasonally thawed layer. On a century timescale, cumulative carbon losses from thermokarst are smaller than estimates of permafrost carbon losses associated with top-down thaw. However, our results indicate that by not accounting for thermokarst and lateral thaw processes, models will underesti
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Turetsky, M., A.D. McGuire, and D. Olefeldt. 2015. Assessing the contributions of thermokarst and thermo-erosion in permafrost feedbacks to climate. Fall Meeting of the American Geophysical Union. Oral Presentation. Invited.
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December 2015
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Our initial results show that cumulative carbon release associated with wetland thermokarst are equivalent to up to 55% of estimated carbon emissions stemming from top-down thaw, suggesting that these localized, abrupt thaw processes are important to consider in assessments of permafrost feedbacks to climate.
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Turetsky, M. R., M. Flannigan, J. Harden, E. Kasischke, A. D. McGuire, D. Vitt, and K. Wieder. April 2007. Peatland C responses to changing hydrology and disturbance regimes: Perspectives from boreal North America. First International Symposium on Carbon in Peatlands, Wageningen, the Netherlands.
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April 2007
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Turetsky, M. R., B. Amiro, M. Flannigan, J. Harden, E. Kasischke, and A. D. McGuire. November 2006. Peatlands and wildfire regimes in the North American boreal forest region: Implications for pyrogenic emissions. Third International Fire Congress, San Diego, CA.
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November 2006
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Turetsky, M. R., B. Amiro, M. Flannigan, J. Harden, E. Kasischke, and A. D. McGuire. August 2006. Peatlands and wildfire regimes in the North American boreal forest region: Implications for pyrogenic emissions. Wetlands 2006 Symposium, Traverse City, MI. Invited.
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August 2006
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Trevor J. Krabbenhoft*, Bonnie J.E. Myers*, Jesse Wong, Cindy Chu, Ralph W. Tingley III, Jeffrey A. Falke, Thomas J. Kwak, Craig P. Paukert, Abigail J. Lynch. 2020. Fish and Climate Change (FiCli) Database: Informing climate change adaptation and management actions for freshwater fishes. World Fisheries Congress, Adelaide, Australia. 11-15 October, 2020.
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October 2020
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Although climate change is known to affect fish globally, a comprehensive online, public database of how climate change has impacted inland fishes worldwide and adaptation or management practices that may address these impacts does not exist. The FiCli provides access to comprehensive published information to inform inland fish conservation and adaptation planning in a changing climate.
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Treat, C., M. R. Turetsky, J. W. Harden, and A. D. McGuire. December 2006. Soil climate controls on methane fluxes in boreal peatlands: Experimental manipulation of soil temperature and water table position in an Alaskan rich fen. Fall Meeting, American Geophysical Union, San Francisco, CA.
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December 2006
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Trainor, S. F., F. S. Chapin III, M. Bifelt, M. Calef, L. DeWilde, N. Fresco, A. D. McGuire, H. Huntington, O. Huntington, A. Lovecraft, D. C. Natcher, J. Nelson, T. S. Rupp, A. Starfield, and E. Zavaleta. October 2006. Human-fire interactions in the boreal forest of Alaska. AAAS Arctic Division Meeting, Fairbanks, AK.
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November 2006
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Torvinen, E., Falke, J., Arp, C., Whitman, M., Adams, J. and C. Zimmerman. 2015. Lake Trout (Salvelinus namaycush) otoliths as biochronological indicators of recent climate patterns in Arctic lakes. Alaska Chapter American Fisheries Society Annual Meeting, Homer, Alaska, 4-6 November, 2015.
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November 2015
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Dendrochronology techniques can be applied to growth-increment widths found in otoliths of long-lived fishes such as Lake Trout (Salvelinus namaycush) to infer climate patterns from growth rates. This master growth chronology may be used as a multidecadal proxy of recent past air and lake temperature regimes and thus will be an important addition to climatological data for the region.
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Torvinen, E., Falke, J., Arp, C., Sutton, T., and C. Zimmerman. 2017. Using Lake Trout (Salvelinus namaycush) otoliths to recreate past patterns of recent climate and growth in Arctic lakes. Alaska Chapter American Fisheries Society Annual Meeting, Fairbanks, Alaska, 19-23 March, 2017.
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March 2017
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The effects of climate change are amplified in high-latitude ecosystems, and due to the remote location of Arctic Alaska long-term spatially and temporally comprehensive climate estimates are needed. Using otoliths as a data source provides a valuable opportunity to reconstruct patterns in recent climate and Lake Trout growth, critical data for conservation and management in the warming Arctic.
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Timm, K., J. Reynolds, J.S. Littell, K. Murphy, E.S. Euskirchen, A.L. Breen, S.T. Gray, A.D. McGuire, S.T. Rupp and the Integrated Ecosystem Model for Alaska and Northwest Canada Team. 2017. Co-production and modeling landscape change – successes and challenges in developing useful climate science. Fall 2017 AGU Meeting. Poster Presentation. Invited.
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December 2017
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The Integrated Ecosystem Model (IEM) for Alaska and Northwest Canada was developed to understand how climate change influences interactions among disturbance (ex. fire), permafrost, hydrology, and vegetation and identify how these changes affect valuable ecosystem services. The IEM was a unique co-production effort in that it was driven by broad management interests (rather than one research question), and because of the landscape-scale outputs, much broader engagement was warranted.
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Tian, H., J. Melillo, D. Kicklighter, S. Pan, J. Liu, A. McGuire, and B. Moore III. July 2001. Regional carbon dynamics in monsoon Asia and its implications to the global carbon cycle. International Geosphere-Biosphere Programme Global Change Open Science Conference, Amsterdam.
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July 2001
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Thompson, C., J. Beringer, F. S. Chapin III, and A. D. McGuire. September 2003. Relationship of structural complexity to land-surface energy exchange along a gradient from arctic tundra to forest. 54th AAAS Arctic Science Conference, Fairbanks, Alaska.
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September 2003
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Thompson, C., J. Beringer, A. D. McGuire, and F. S. Chapin III. December 2003. Carbon exchange along a vegetation gradient from arctic tundra to boreal forest. Fall Meeting, American Geophysical Society, San Francisco, CA.
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December 2003
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Thompson, C., J. Beringer, A. D. McGuire, and F. S. Chapin III. August 2004. Carbon exchange along a gradient from arctic tundra to boreal treeline. Annual Meeting, Ecological Society of America, Portland, OR.
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August 2004
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Terwilliger, M. and B. Griffith. September 2006. Relationships among population and habitat characteristics for Dall's sheep in Wrangell-St. Elias National Park and Preserve, Alaska. Session 16, The Wildlife Society 2006 Annual Meeting, Anchorage, AK.
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September 2006
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Taylor, A.R., R.B. Lanctot, and A.N. Powell. 2008. Abundance and distribution of staging shorebirds on Alaska's Chukchi and Beaufort coasts. 13th Alaska Bird Conference.
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March 2008
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Taylor, A., R. Lanctot, T. Williams, A. Kitaysky, and A. Powell. Evaluating physiologic metrics for assessing site quality for species with varying molt strategies. 4th Western Hemisphere Shorebird Group Meeting, Vancouver, B.C.
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August 2011
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Taylor, A., R. Lanctot, A. Powell, and T. Williams. 2006. Should I stay or should I go now: the importance of staging sites to shorebirds on Alaska's North Slope. 28 February, Shorebird Science in the Western Hemisphere, Boulder, CO.
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February 2006
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Taylor, A. R., A. N. Powell, R. B. Lanctot, T. D. Williams, and A. S. Kitaysky. 2005. Using physiology to predict staging behavior of post-breeding shorebirds on Alaska's North Slope. Poster, Annual Meeting, Pacific Seabird Group/Waterbird Society Meeting, 19-23 January, Portland, OR.
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January 2005
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Tauzer, L., A. N. Powell, and S. Sharbaugh. 2012. Ecosystem shift in an Alaskan boreal forest: evidence that succession drives avian population change. 23 October. 15th Annual Alaska Bird Conference, Anchorage, AK.
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October 2012
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Tauzer, L. and A. Powell. 2012. Ecosystem shift in an Alaskan boreal forest: is there evidence of change in avian communities? Poster, 5th North American Ornithological Conference, Vancouver, B.C.
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August 2012
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Tatiana Loboda, Eric Kasischke, A. David McGuire, Helene Genet, and Elizabeth Hoy. 2015. The Alaska Forest Disturbance Carbon Tracking System. North American Carbon Program Meeting, Washington, DC.
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January 2015
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. This project is designed to deliver estimates of emissions from boreal forest fires in Interior Alaska obtained at moderate spatial resolution (60 m) through data fusion of Landsat-based assessment of burned area and burn severity, Moderate Resolution Imaging Spectroradiometer (MODIS)-based assessment of fire progression, and Terrestrial Ecology Model (TEM) estimates of carbon stocks on the landscape between 2001 and 2010.
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Szepanski, M. and B. Griffith. May 2005. Nutritional capacity of moose winter habitats in Alaska. Forty-first North American Moose Conference and Workshop, Whitefish, MT.
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May 2006
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Swanson, S., K. Kielland, J. Schmidt, S. Crimmins, and M. Flamme. 2023. Seasonal drivers of amplitude patterns in a variably cyclic population of red-backed voles (Nyodes rutilus). Alaska Chapter of the Wildlife Society Annual Conference, Fairbanks, AK.
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April 2023
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We evaluated the relative influence of intrinsic and extrinsic factors on cyclical dynamics of small mammals in Interior Alaska
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Strohm-Klobucar, D.D., and J.A. Falke. 2020. Gaging the importance: characterizing hydrologic regimes of headwater streams in changing boreal ecosystems. Alaska Chapter of the American Fisheries Society Annual Meeting, Fairbanks, Alaska, 23-26 March, 2020.
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March 2020
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As small streams are highly prevalent and ecologically important to boreal stream ecosystem function, understanding current and future hydrologic patterns will be important for effective aquatic species management.Our hydrologic regime characterization will provide a benchmark with which to detect potential regime shifts that may result from continued climate warming across the Northwest Boreal Ecosystem, and provide valuable information toward management and conservation of important boreal fi
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Strohm-Klobucar, D.D., J.A. Falke, and J.W. Stone 2021. Monitoring Arctic Grayling (Thymallus arcticus) demographics and vital rates in a boreal headwater tributary. Alaska Chapter of the American Fisheries Society Annual Meeting [virtual], 22-25 March, 2021.
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March 2021
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With the imminent threat of climate change, the goal of our study is to better understand the extent tributary watersheds contribute to fish population viability and structure in boreal riverscapes via long-term population monitoring. Our study will advance the current understanding of Arctic Grayling life history and habitat use, allowing managers to adapt and prioritize habitat conservation needs.
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Strohm, D.D., Falke, J.A., and Paul, J.D. 2023. Hydrologic regime characterization for wildfire-impacted streams in changing boreal ecosystems. Alaska Chapter of the American Fisheries Society Annual Meeting, Fairbanks, Alaska, 27 – 31, March 2023.
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March 2023
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Stream flow is a primary driver of boreal stream ecosystems, particularly in headwaters which are rarely monitored and where wildfires are increasing. We developed a hydrologic regime characterization that provides a baseline to identify boreal streams most affected by wildfire, detect potential regime shifts from continued climate warming and increased fire disturbance, and provide information for conservation of boreal aquatic species.
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Strohm, D.D., Falke, J.A., and Bennett, A.P. 2022. Gaging the importance of headwater tributaries: hydrologic regime characterization for streams in changing boreal ecosystems. Alaska Chapter of the American Fisheries Society Virtual Meeting, 28 February– 3 March, 2022.
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February 2022
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Stream flow is a primary ecological driver of stream ecosystems that strongly influences biotic and abiotic processes, particularly in headwater streams that are tightly linked to the surrounding landscape. Our hydrologic regime characterization will provide a baseline for boreal streams that can be used to detect potential regime shifts from continued climate warming at multiple spatial scales, and provide valuable information toward management and conservation of important boreal aquatic spec
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Steen, V., A. N. Powell, and S. Skagen. 2011. Potential effects of climate change on the distribution of wetland-associated birds in the Prairie Pothole Region, USA. 14 March, Waterbird Society Annual Meeting, Grand Island, NE.
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March 2011
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Steen, V. and A. Powell. 2011. Potential effects of climate change on waterbirds in the Prairie Pothole Region, USA. 11 March, AFO/COS/WOS Joint Meeting, Kearney, NE.
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March 2011
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Steen, V. A. and A. N. Powell. 2009. A comparison of multi-scale habitat models for black terns. Poster, 79th Cooper Ornithological Society Conference, Tucson, AZ.
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April 2009
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Steen V. A. and A. N. Powell. 2009. Nest site and foraging habitat selection by black terns in the Prairie Pothole region. COS/AOU/SCO Joint Annual Meeting, San Diego, CA.
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February 2010
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Steen V. A. and A. N. Powell. 2009. Habitat selection of black terns in the Prairie Pothole Region. 33rd Waterbird Society Conference, Cape May, NJ.
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November 2009
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Steen V. A. and A. N. Powell. 2009. A comparison of multi-scale habitat models for black terns. Poster, 16th Wildlife Society Conference, Monterey, CA.
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September 2009
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Starbuck, M., A. Metcalfe, J. Muehlbauer, D. Lytle and T. Kennedy. 2023. A deep dive on net-spinning caddisflies (Hydropsyche oslari): measurements of adult body size and stable isotopes provides insights into growing conditions for aquatic insects during the Bug Flow Experiment. National Conference on Ecological Restoration, Albuquerque, New Mexico, 14-19 April 2024.
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April 2024
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This study examined the responds of body size and feeding of caddisflies in response to the Bug Flow Experiment from Glen Canyon Dam in the Colorado River in Grand Canyon.
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Sparks, M.M., Falke, J.A., Westley, P.A.H., Adkison, M.D., Bartz, K., Quinn, T.P., Schindler, D.E., and D. Young. 2018. Predicting developmental phenology in wild populations: a case study with western Alaska sockeye salmon. Indiana Chapter American Fisheries Society Annual Meeting. 12-13 February, 2018. Lafayette, IN.
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February 2018
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We applied an empirical model to predict hatching and emergence timing to 25 western Alaska sockeye salmon (Oncorhynchus nerka) populations in four lake-nursery systems to explore current patterns and potential responses of early life history phenology to warming water temperatures. Our results reveal marked variation in the timing of hatching and emergence among populations in close proximity on the landscape, which may serve to buffer this metapopulation from climate change.
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Sparks, M., Westley, P., Falke, J., and T. Quinn. 2016. Experimental tests for thermal local adaptation and heritable phenotypic plasticity in hatching timing by sockeye salmon using a common garden approach. Evolution 2016, Austin, TX. 17-21 June, 2016.
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June 2016
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Water temperatures are increasing globally, which can be challenging for northern latitude freshwater fishes where warming is occurring at the fastest rate. Populations may adapt to warming through a combination of genetic or environmentally induced plasticity, but the extent to which these factors suffice in realistic scenarios is unknown. Our results showed that the effects of climate change during the early life history stages may by buffered by phenotypic plasticity, and that thermal variab
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Sparks, M., Westley, P., Falke, J., and M. Adkison. 2016. Predicting Sockeye Salmon (Oncorhynchus nerka) hatch timing by incorporating natural variability into an existing model. Western Alaska Interdisciplinary Science Conference. Dillingham, AK. 9-12 March 2016.
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March 2016
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An important tool for understanding the potential for adaptation is the predicted response of phenology as it relates to changes in early life history developmental temperatures. Here we present work that extends an existing empirical model to incorporate more realistic daily average temperature in place of constant temperature over the course of incubation.
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Sparks, M., Westley, P., Falke, J., and M. Adkison. 2015. Predicting Sockeye Salmon (Oncorhynchus nerka) hatch timing by incorporating natural variability into an existing model. Alaska Chapter American Fisheries Society Annual Meeting, Homer, Alaska, 4-6 November, 2015.
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November 2015
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Experiments investigating the relationship between temperature and developmental rate have been conducted with constant temperature regimes and thus current models for predicting phenology only incorporate average experienced temperatures. Our new model allows users to predict hatch timing without the need to estimate average temperature over the course of incubation and appropriately accounts for average daily temperature and each day’s respective contribution towards development.
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Sloan, V.L., C. Iversen, J. Childs, E.S. Euskirchen, A.D. McGuire, and R.J. Norby. 2012. Linking vegetation composition to geomorphic units in a polygonal tundra landscape: A framework for improving estimates of plant functional type coverage in ecosystem models. Meeting of the American Geophysical Union, San Francisco, California.
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December 2012
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Our results support this hypothesis with respect to center and trough communities, but suggest that further classification of polygon type is required to accurately predict ridge community composition.
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Silapaswan, C. S., D. L. Verbyla, and A. D. McGuire. December 2000. The use of remote sensing to evaluate the potential influences of climate change on historical vegetation dynamics. American Geophysical Union Fall Meeting, San Francisco.
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December 2000
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Shvidenko, A., R.A. Birdsey, A.D. McGuire, W. Kurz, D. Schepaschenko, and I. McCallum. Setember 2009. Impact of forests of northern extratropical belt on global carbon cycle. XIII World Forestry Congress, Buenos Aires, Argentina.
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September 2009
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Shvidenko, A., M. Apps, F. S. Chapin III, M. Fukuda, A. D. McGuire, and S. Nilsson. November 2003. Disturbances and disturbance regimes in boreal forests: A system-analytical view. International Symposium on Boreal Forest Disturbance and Its Effects to Global Warming, Hokkaido University, Sapporo, Japan. Invited.
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November 2003
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Shvidenko, A. Z., Ch. Schmullius, M. Apps, K. Bergen, J. Cihlar, D. F. Effremov, R. A. Houghton, A. D. McGuire, S. Nilsson, F. I. Pleshikov, V. A. Rozhkov, E. A. Vaganov, W. Steffen, and D.-E. Schultze. August 2002. On an integrated project on estimating the role of northern Eurasia forests in global biogeochemical cycles. International Boreal Forest Research Association XI International Conference, Boreal Forests and the Environment: Local, Regional, and Global Scales, Krasnoyarsk, Russia. Invited.
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August 2002
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Shaftel, R., Mauger, S., Falke, J., Rinella, D., Davis, J. and L. Jones. 2017. Characterization of thermal regimes in the Mat-Su Basin. MatSu Science Symposium, Palmer, Alaska, 8-9 November, 2017.
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November 2017
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Stream temperatures within river networks influence the abundance, distribution, growth rates, phenology, and survival of Pacific salmon. Our final analysis will provide an understanding of the landscape and climate conditions associated with the four thermal regimes, which can be used to help guide habitat conservation strategies and priorities for Mat-Su Basin salmon populations.
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Shaftel, R., M.L. Feddern, E. Schoen, C. Cunningham, V.R. von Biela, S. McAfee, and J.A. Falke. 2023. Modeling stream temperature and flow from gridded climate datasets in Alaska’s Yukon and Kuskokwim basins. American Fisheries Society Alaska Chapter Annual Meeting, Fairbanks, Alaska, 27-31 March 2023.
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March 2023
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Use of empirical stream temperature and streamflow datasets for research in Alaska poses several challenges: data are often unavailable for an area of interest, datasets are typically of short durations, and sites are managed independently across agencies and organizations. For this project, we reviewed gridded climate products and validated models against in situ data to develop more complete historical time series of stream temperature and streamflow in the Yukon and Kuskokwim River basins.
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Sexson, M., M. R. Petersen, and A. N. Powell. 2010. Spatiotemporal distribution of spectacled eiders during nonbreeding seasons. 14th Alaska Bird Conference, Anchorage, AK.
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November 2010
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Sexson, M., M. Petersen, and A. N. Powell. 2010. Preliminary results from ongoing spectacled eider satellite telemetry. Alaska Marine Science Symposium, Anchorage, AK.
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January 2010
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Sexson, M. G., M. R. Petersen, and A. N. Powell. 2012. Spatiotemporal distribution of Spectacled Eiders throughout the annual cycle. 23 October. 15th Annual Alaska Bird Conference, Anchorage, AK.
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October 2012
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Sexson, M. G., M. R. Peterse, and A. N. Powell. 2011. Then and now: a comparison in the distribution of Spectacled Eiders at nonbreeding areas in the past 15 years. 4th International Sea Duck Conference, Seward, AK.
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September 2011
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Servheen, G., M. Wipfli, C.V. Baxter, L. Felicetti, A.M. Marcarelli, and K. Kavanagh. September 2011. Managing and mitigating salmon-derived nutrients: Are analogs salmon avatars? Annual Meeting, American Fisheries Society, Seattle, WA.
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September 2011
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Sergeant, C. J., and Falke, J. A. 2018. A flexible and intuitive approach for categorizing streamflow patterns in Southeast Alaska. Western Division American Fisheries Society Annual Meeting, Anchorage, Alaska, 21-25 May, 2018.
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May 2018
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Hydrologic classification is a widely applied practice with numerous analytical approaches, but its fundamental goal is to arrange streams into a logical set of categories based on their flow characteristics. Identification of transitional watersheds across the landscape will provide key information for adaptive fishery and watershed conservation planning.
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Sergeant, C. J., J. R. Bellmore, R. A. Bellmore, and J. A. Falke. 2021. How will Pacific salmon in Alaska respond to changes in streamflow and water temperature? AFS Alaska Chapter Meeting, Delivered remotely, 22-25 March, 2021.
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March 2021
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Preserving habitat diversity across many watersheds supports healthy Pacific salmon populations by dampening the variability of inter-annual abundance. Our end goal is to create a user-friendly life cycle model for communities to explore the impact of various climate change scenarios on salmon.
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Sergeant, C. J., J. R. Bellmore, J. A. Falke, and R. A. Bellmore. 2022. Spawning Pacific salmon and DO dynamics in southeastern Alaska rivers. American Fisheries Society Alaska Chapter Annual Meeting, Juneau, Alaska, 28 February-4 March, 2022.
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February 2022
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Adequate dissolved oxygen (DO) levels are critical for maintaining the health of aquatic organisms in high-latitude freshwater ecosystems. We overlaid hypoxia risk predictions with proximity to current hatchery release sites across the region and the resulting maps have multiple uses, including 1) considering the potential implications of shifting summer streamflow patterns or increased straying in hypoxia-prone areas, and 2) prioritizing future ecological monitoring to determine whether predic
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Sergeant, C. J., J. A. Falke, R. L. Crumley, and J. R. Bellmore. 2019. Fuzzy streamflow classification of Gulf of Alaska coastal watersheds to support aquatic research and monitoring. Alaska Chapter American Fisheries Society Annual Meeting, Sitka, Alaska, 19-21 March, 2019.
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March 2019
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The timing and magnitude of streamflow are critical drivers of freshwater ecosystem health, but are likely to shift in this region due to continued glacial recession, diminishing snowpack, increased rainfall, and warming air temperature. Our ultimate hope is to create a widely used hydrologic framework for guiding aquatic research and monitoring throughout Gulf of Alaska coastal ecosystems.
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Sergeant, C. J., J. A. Falke, J. R. Bellmore, and R. A. Bellmore. 2020. How will Pacific salmon in Alaska respond to changes in streamflow and water temperature? ASLO-SFS Joint Summer Meeting, Madison, Wisconsin, 7-12 June, 2020.
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June 2020
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Preserving habitat diversity across many watersheds supports healthy Pacific salmon populations by dampening the variability of inter-annual abundance. Our end goal is to create a user-friendly life cycle model for communities to explore the impact of various climate change scenarios on salmon.
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Sellmer, K, M Wipfli, E Schoen, A Lopez. 2015. Juvenile Chinook Salmon predation in freshwater within the AYK Region. AK AFS
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November 2015
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Highlights the role predators play in Juvenile Chinook Salmon mortality in selected habitats, and what the important predators are at certain times of the year.
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Scott, J., B. Griffith, B. Adamcik, D. Ashe, B. Czech, R. Fischman, P. Gonzales, A.D. McGuire, and A. Pidgorna. November 2008. Managing for change: Climate change and the National Wildlife Refuge System. Region 4 Climate Change Workshop, USFWS, Atlanta, GA. Invited.
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November 2008
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Scott, J., B. Griffith, B. Adamcik, D. Ashe, B. Czech, R. Fischman, P. Gonzales, A.D. McGuire, and A. Pidgorna. November 2008. Managing for change: Climate change and the National Wildlife Refuge System. Region 3 Climate Change Workshop,USFWS, Minneapolis, MN. Invited.
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November 2008
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Scott, J., B. Griffith, B. Adamcik, D. Ashe, B. Czech, R. Fischman, P. Gonzales, A.D. McGuire and A. Pidgorna. 2009. Managing for change: Climate change and the National Wildlife Refuge System. Environmental Defense Fund Climate Change Workshop, San Francisco, CA.
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February 2009
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Scott, J., B. Griffith, B. Adamcik, D. Ashe, B. Czech, R. Fischman, P. Gonzales, A. D. McGuire, and A. Pidgorna. July 2008. Managing for change: climate change and the National Wildlife Refuge System. Invited presentation, U.S. Fish and Wildlife Service Region 6 Climate Change Workshop, 31 July 2008, Denver, CO.
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July 2008
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Scott, J., B. Griffith, B. Adamcik, D. Ashe, B. Czech, R. Fischman, P. Gonzales, A. D. McGuire, and A. Pidgorna. October 2007. Managing for change: climate change and the National Wildlife Refuge System. Invited presentation at the U.S. Environmental Protection Agency SAP 4.4 FACA Review, 22 October 2007, Arlington, VA.
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October 2007
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Scott, J., B. Griffith, B. Adamcik, D. Ashe, B. Czech, R. Fischman, P. Gonzales, A. D. McGuire and A. Pidgorna. February 2008. Managing for change: climate change and the National Wildlife Refuge System. Invited presentation, U.S. Fish and Wildlife Service Region 2 Climate Change Workshop. 13 February 2008, Albuquerque, NM.
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February 2008
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Scott, J. M., B. Griffith, R. Adamcik, D. Ashe, B. Czech, R. Fischman, P. Gonzales, and A. Pidgorna. June 2007. Managing for change: climate change and the National Wildlife Refuge System. Climate Change Session, 2007 Annual Meeting of the Cooper Ornithological Society, Moscow, ID. Invited.
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June 2007
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Scott, J. M., B. Griffith, R. Adamcik, D. Ashe, B. Czech, R. Fischman, P. Gonzales, and A. Pidgorna. July 2007. Managing for change: climate change and the National Wildlife Refuge System. Invited paper presented at the Joint FWS/USGS Executive Leadership Team Meeting, Anchorage, AK.
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July 2007
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Schädel, C., E.A.G. Schuur, A.D. McGuire, J. Canadell, J. Harden, P. Kuhry, V. Romanovsky, and M. Turetsky. 2012. Vulnerability of permafrost carbon research coordination network. Annual Meeting of the European Geophysical Union. Vienna, Austria.
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April 2012
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Schädel, C., A.D. McGuire, J. G. Canadell, J. W. Harden, P. Kuhry, V. E. Romanovsky, M. R. Turetsky, and E.A.G. Schuur. 2012. Vulnerability of permafrost carbon research coordination network. Tenth International Conference on Permafrost. Salekhard, Russia.
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July 2012
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Schuur, E.A.G, A.D. McGuire, and V.E. Romanovsky. 2016. Arctic and boreal carbon stocks and vulnerability. Fall 2016 Meeting of the American Geophysical Union. Oral Presentation.
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December 2016
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A more comprehensive understanding of these landscape processes causing permafrost to thaw abruptly has shown that upland and lowland landscapes are susceptible to abrupt thaw and that this process is likely to be an important mechanism as permafrost thaws in a warming climate. Large-scale models for the most part do not yet incorporate abrupt thaw mechanisms, but can simulate direct climate warming effects on ecosystem carbon balance. Model projections tend to estimate losses of carbon in line
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Schuur, E.A., A.D. McGuire, J. Canadell, J.W. Harden, P. Kuhry, V.E. Romanovsky, M.R. Turetsky, and C. Schadel. December 2011. Vulnerability of permafrost carbon research coordination network. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2011
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Schoen, ER, JR Neuswanger, CJ Volk, MS Wipfli, JW Savereide. 2020. Stream temperature and flow-related variability in invertebrate drift and Chinook Salmon growth in the Chena River, Alaska. Alaska Chapter American Fisheries Society annual meeting, Fairbanks, AK, March 2020.
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March 2020
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Study aimed to understand juvenile Chinook growth in relation to temperature- and streamflow-related variability in the concentrations of drifting prey and organic debris in the Chena River Basin, one of the major Chinook producers in interior Alaska. Air temperatures were unusually high and streamflows were unusually low during June and July, leading to faster growth of juvenile Chinook those months than observed during prior years, but growth slowed during August and September, when prolonged
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Schoen, E., K Sellmer, M Wipfli, A Lopez, R Ivanoff. 2017. Freshwater predation of juvenile Chinook Salmon in the Arctic-Yukon-Kuskokwim region of Alaska. AK AFS conference, Fairbanks, AK, March 2017.
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March 2017
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Study identified piscine predators of juvenile Chinook Salmon in selected watersheds of western and interior Alaska. We also determined that spring and fall seasons, and off-channel habitats are times and places that Chinook are most vulnerable to predation.
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Schoen, E. M Wipfli, E Trammel, D Rinella, and 12 coauthors. Future of Salmon in the Face of Environmental Change. Western Division of the American Fisheries Society annual conference, Anchorage, Alaska, May 2018.
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May 2018
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This work is associated with a larger effort (Schoen et al.) on understanding how landscape change will affect salmon, but this piece focuses specifically on key watershed drivers -- glacial loss, wildfires, longer and dryer summers -- on salmon habitat in the Kenai Rivers. Some habitats will become less amenable for rearing and spawning salmon, while others should improve.
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Schoen, E, M Wipfli, K Rine, T Nightengale. 2015. Pulsed food subsidies across a habitat mosaic shape growth opportunities for rearing salmon in a glacial Alaskan river. American Fisheries Society national conference. Portland, OR.
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August 2015
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The study looked at growth limiting factors for Chinook salmon in a large glacial river in Alaska. Bioenergetics results showed salmon growth was more limited by food than temperature in most habitats.
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Schoen, E, M Wipfli, K Rine, T Nightengale. 2015. Pulsed food subsidies across a habitat mosaic provide heterogeneous growth opportunities for rearing salmon in a glacial Alaskan river. AK AFS.
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November 2015
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Bioenergetic models show that food plays a more important role than temperature, and changes in food supplies as a function of hydroelectric developments could affect rearing fishes.
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Schoen, E, M Wipfli, J Trammell, D Rinella, and 11 authors. 2017. Pacific Salmon in the Face of Climate and Landscape Change: Insights from the Kenai River. AK AFS conference, Fairbanks, AK, March 2017.
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March 2017
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The work is a summary of the highlights of a manuscript submitted to Fisheries that talks about how landscape and climate change will likely affect fisheries in southcentral Alaska. It goes on to point out where the risks and opportunities may exist as fisheries change in the coming years.
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Schoen, E, M Wipfli, E Trammel, D Rinella, A Floyd, J Grunblatt, et al. Future of Salmon in the Face of Change: Lessons from One of the World's Remaining Productive Salmon Regions. Western Division of the American Fisheries Society annual conference, Anchorage, Alaska, May 2018.
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May 2018
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Work is a synthesis of the landscape factors affecting salmon populations in Alaska. Paper predicts how salmon will likely be affected by climate and landscape change in the future.
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Schoen, E, M Wipfli, B Meyer, K Rine, K Sellmer. 2017. Future of Alaskan Salmon in the Face of Change: Bringing a Food-Web Perspective to Management and Conservation. WDAFS, Missoula, MT
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May 2017
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Work summarized the outlook for Chinook Salmon and their food webs in the face of climate and landscape change. Especially brought to light the management and conservation implications of managing food webs.
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Schmidt, J., A. N. Powell, E. Rexstad, and E. Taylor. 2004. Incubation rates and patterns in a nest-box population of common goldeneyes in interior Alaska. 18 March, 2004. Alaska Bird Conference, Anchorage.
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March 2004
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Schmidt, J. H., E. Rexstad, E. J. Taylor, and A. N. Powell. 2002. Duckling survival rate and nest attendance patterns in common goldeneyes in interior Alaska: Preliminary Results. Poster; North American Sea Duck Conference, 6-10 November 2002, Victoria, B.C.
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November 2002
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Samuel, W. T., J. A. Falke, K. D. Tape, S. K. Panda, A. C. Seitz. 2023. When beavers get burned, do fish get fried? Assessing beaver impacts on fish in a fire-dominated ecosystem using a combination of traditional fish sampling and eDNA. Alaska Chapter American Fisheries Society Annual Meeting, Fairbanks, AK. March 27-31.
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March 2023
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We used a combination of <i>in situ</i> fish sampling and environmental DNA (eDNA) to assess interactions among beavers, Arctic Grayling, and wildfire in burned streams with beaver ponds, and fit models to predict fish abundance based on eDNA concentrations and environmental characteristics. Beavers partially or fully prevented fish from accessing upstream habitats at most sites, and we plan to apply the abundance-eDNA model to 56 additional sites throughout interior Alaska.
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Samuel, W. T., J. A. Falke, K. D. Tape, S. K. Panda, A. C. Seitz. 2022. When beavers get burned, do fish get fried? The role of beavers to mediate wildfire effects on freshwater fish habitat in boreal Alaska. American Fisheries Society 152nd Annual Meeting, Spokane, WA. August 21–25.
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August 2022
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Wildfire is a dominant natural disturbance process throughout boreal North America and fires are increasing in frequency, size, and severity; however, little is known about how wildfire affects fish habitat and populations despite the substantial impacts of fire on ecosystem processes, and even less is known about how fire effects may be mediated by species interactions. Overall, this study will help to provide a better understanding of the role of beavers in maintaining diverse and productive
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Samuel, W. T., J. A. Falke, K. D. Tape, S. K. Panda, A. C. Seitz. 2022. When beavers get burned, do fish get fried? The role of beavers to mediate wildfire effects on freshwater fish habitat in boreal Alaska. Alaska Chapter American Fisheries Society Meeting [Virtual]. 28 Feb – 4 Mar, 2022.
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February 2022
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Little is known about how wildfireDownload File affects fish habitat and populations despite the substantial impacts of fire on ecosystem processes, and even less is known about how fire effects may be mediated by species interactions. Our results will provide a better understanding of the role of beavers to maintain diverse and productive aquatic habitats in riverscapes under changing wildfire conditions, and yield important insights about climate adaptation for aquatic organisms in boreal str
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Russell, D. E., G. P. Kofinas, B. Griffith, and R. G White. September 2005. Assessing the impacts of oil and gas development on wild Rangifer herds: Data requirements, assessment tools and monitoring initiatives. Seventh International Conference and Exhibition of Offshore Oil and Gas Development--RAO/CIS Offshore 2005. International Symposium on Oil and Gas Activities in the Arctic. St. Petersburg, Russia.
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September 2005
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Russell, D. E., B. Griffith, and G. Kofinas. January 2003. Caribou in a changing tundra environment. Invited Lecture, Annual Meeting of the Society for Integrative and Comparative Biology. Special Theme - Biology in the Arctic. Toronto, Ontario, Canada.
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January 2003
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Rover, J., B.K. Wylie, K.P. Wickland, B. Griffith, D. Dahal, and B. Granneman. March 2010. Quantifying surface water in the Yukon River Basin. USGS Global Change Conference, Denver, CO.
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March 2010
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Rosenberger, A.E., J.B. Dunham, M.S. Wipfli, and J.M. Buffington. 2005. Effects of fire and subsequent channel-reorganizing events on invertebrate drift and rainbow trout diet in small headwater streams 10 years post-disturbance. American Geophysical Union / North American Benthological Society joint assembly conference. New Orleans, LA.
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May 2005
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Rosenberger, A.E., J. Dunham, M. Wipfli, and J. Buffington. Effects of fire and subsequent channel disturbance on invertebrate drift and trout diet 10 years post-disturbance. Seminar, joint annual meeting of the North American Benthological Society and the American Geophysical Union, New Orleans, Louisiana in a symposium titled, “Interactions Between Physical and Biological Processes in Riverine Landscapes: Ecosystem Response to Physical Processes and Disturbance,” organized by J. Buffington, A. Rosenberger, and C. Baxter. September, 2005.
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September 2005
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Invited seminar on ecosystem effects of wildfire on headwater streams.
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Rosenberger, A.E., J. Dunham, M. Wipfli, and J. Buffington. Effects of fire and subsequent channel disturbance on invertebrate drift and trout diet 10 years post-disturbance. Department of Geosciences colloquium, Idaho State University. February, 2005.
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February 2005
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Effects of fire on stream ecosystem properties.
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Roon, D.A., M.S. Wipfli, and T.L. Wurtz. November 2009. Ecological effects of introduced European bird cherry on salmonid food webs in Anchorage streams. American Fisheries Society Alaska Chapter annual meeting, Fairbanks, AK. (AFS abstract)
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November 2009
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Roon, D.A., M.S. Wipfli, T.L.Wurtz, and A. Prakash. November 2010. Invasive European bird cherry affects prey resources for juvenile coho salmon in Anchorage streams. Annual Meeting, Alaska Chapter, American Fisheries Society, Juneau, AK.
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November 2010
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Roon, D.A., M.S. Wipfli, T.L. Wurtz, and J.J. Kruse. 2012. Effects of riparian invasives on prey resources for juvenile coho salmon in southcentral Alaskan streams. American Fisheries Society Alaska Chapter meeting, Kodiak, AK, 24-26 Oct.
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October 2013
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Roon, D.A., M.S. Wipfli, T.L. Wurtz, and A. Prakash. June 2010. Invasive European bird cherry affects ecological processes within Alaska streams and riparian forests. Joint American Society of Limnology and Oceanography & North American Benthological Society annual meetings, Santa Fe, NM. (ASLO/NABS abstract)
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June 2010
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Roon, D.A., M.S. Wipfli, T.L. Wurtz, M. Rasy, and W. Rice. 2008. Ecological effects of an introduced tree, European birdcherry, on stream food webs in Campbell and Chester Creeks, Anchorage, Alaska. American Fisheries Society Alaska Chapter annual meeting, Anchorage, AK, 27-30 October.
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October 2008
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Roon, D., M. Wipfli, and T. Wurtz. September 2011. Invasive European bird cherry affects terrestrially-derived prey abundance for juvenile coho salmon. Annual Meeting, American Fisheries Society, Seattle, WA.
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September 2011
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Robinson, B., A. Powell, L. Phillips, and H. Coletti. 2014. Are prey remains accurate indicators of chick diet? Implications for long-term monitoring of Black Oystercatchers. 16th Annual Alaska Bird Conference, Juneau, AK.
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December 2014
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We assess whether NPS long term monitoring adequately assesses prey used by Black Oystercatchers to provision their young.
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Robinson, B., A. N. Powell, and L. M. Phillips. 2014. Chick provisioning and nutritional quality of Black Oystercatcher prey. The Wildlife Society Alaska Chapter, Anchorage, AK.
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April 2014
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We provide preliminary analyses of nutritional value of prey delivers to Black Oystercatcher chicks by their parents. These data will inform managers whether nearshore monitoring is proving data on metrics that apply to multiple trophic levels.
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Robbins, C.J., T. Simmons and J.D. Muehlbauer. 2024. Spatial and decadal-scale temporal changes in water chemistry and macroinvertebrates in central Alaska. Annual Meeting, Society for Freshwater Science, 2-6 June 2024.
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June 2024
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This presentation examines long-term trends in water quality and ecological community composition in streams on public lands, especially within National Park Service Units, throughout central Alaska. Results help understand trends and changes over time in response to climate change.
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Robbins, C.J., T. Simmons and J.D. Muehlbauer. 2024. Spatial and decadal-scale temporal changes in water chemistry and macroinvertebrates in central Alaska. Alaska Chapter American Fisheries Society Annual Meeting, Seward, Alaska, 25-29 March 2024.
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March 2024
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We explored a data set of water chemistry and benthic macroinvertebrate communities collected by the National Parks Service between the years 2004 and 2022 at ~225 sites in the Central Alaska Inventory and Monitoring Network. We found elevation is a key spatial driver of both water chemistry and invertebrate communities. We also detected temporally increasing trends for nitrogen concentration and invertebrate richness over the last two decades.
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Roach, J., B. Griffith, and D. Verbyla. Lake change: Landscape influences and implications for waterfowl species richness. Poster presented at the 2013 annual Coordinating Committee meeting of the Alaska Cooperative Fish and Wildlife Research Unit. Fairbanks, Alaska
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March 2013
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There is a net drying trend in lakes in Alaskan National Wildlife Refuges. Because waterfowl species richness is a positive function of lake size, lake drying is expected to reduce waterfowl species richness.
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Roach, J., B. Griffith and D. Verbyla. Heterogeneity in High Latitude Lake Area Trends and Relationship to Landscape Characteristics. Poster presented and 2012 Annual Meeting of AGU.
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December 2012
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This study identified significant, post-1986, declines in lake area in Alaskan National Wildlife Refuges and the landscape characteristics associated with the declines. We also identify substantial heterogeneity in lake change and our data provide local land managers and national strategic planners with the capacity to identify stable lakes and refuges that may serve as centers of biodiversity resiliency in a changing climate.
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Roach, J. K. and B. Griffith. August 2008. Heterogeneity in climate warming effects on arctic aquatic habitats. Invited Presentation, Symposium on Effects of Climated-related Drying and Surface Water Loss on Aquatic Ecosystems in Extreme Environments. 138th Annual Meeting, American Fisheries Society, Ottawa, Ontario.
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August 2008
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Rinella, D.J., M.S. Wipfli, and C. Stricker. August 2010. Relationships among spawning salmon abundance, stable isotope measures of marine-derived nutrient assimilation, and the fitness of stream-dwelling fishes. 7th International Conference on Application of Stable Isotope Techniques to Ecological Studies, Fairbanks, AK. (ISOECOL abstract)
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August 2010
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Rinella, D.J., M.S. Wipfli, C. Walker, and C.A. Stricker. 2005. Tracking marine-derived nutrients in riverine ecosystems in Alaska. Exxon Valdez Oil Spill Trustee Council Symposium. Anchorage, AK.
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January 2005
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Rinella, D.J., M.S. Wipfli, C. Walker, and C.A. Stricker. 2005. Marine-derived nutrients (MDN) in riverine ecosystems: Developing monitoring tools for tracking MDN in Alaska watersheds. American Geophysical Union / North American Benthological Society joint assembly conference. New Orleans, LA.
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May 2005
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Rinella, D.J., M.S. Wipfli, C. Walker, C. Stricker, and R. Heintz. 2006. Marine-derived nutrients (MDN) in riverine ecosystems: developing monitoring tools for tracking MDN in Alaska watersheds. Marine Science Symposium for Alaska, Anchorage, Alaska, 22-24 Jan; and North American Benthological Society annual meeting, Anchorage, AK, 4-8 June.
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June 2006
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Rinella, D.J., M.S. Wipfli, C. Stricker, and R. Heintz. November 2009. Relationships between spawning salmon abundance and the fitness of stream-dwelling fishes, Kenai Peninsula, Alaska. American Fisheries Society Alaska Chapter annual meeting, Fairbanks, AK. (AFS abstract)
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November 2009
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Rinella, D.J., M.S. Wipfli, C. Stricker, and C. Walker. 2008. Evaluating stable isotopes and fatty acids for tracking marine-derived nutrient assimilation in stream-resident fish. North American Benthological Society, Salt Lake City, Utah, 26-29 May, 2008.
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May 2008
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Rinella, D.J., M.S. Wipfli, C. Stricker, R. Heintz, and C. Walker. 2008. Developing tools for monitoring marine-derived nutrients in Alaska watersheds. American Fisheries Society Alaska Chapter annual meeting, Anchorage, AK, 27-30 October.
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October 2008
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Rine, K, M Wipfli, E Schoen, C Stricker. 2014. Patterns of energy flow in salmonid food webs within a large glacial Alaskan river. Joint Aquatic Sciences Meeting. Portland, OR.
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May 2014
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Study showed how energy flows through food webs via prey flow and isotope signals on the Susitna River in Alaska.
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Rine, K, M Wipfli, E Schoen, C Stricker, T Nightengale. 2015. Patterns of cross-ecosystem food subsidies to rearing salmonids within a large glacial Alaskan river. AK AFS
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November 2015
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Shows the importance of food from different sources affects salmonids on the Sustina River, and provides insight into possible landscape and climate change effects.
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Rine, K, M Wipfli, E Schoen, C Stricker, J Jones, T Nightengale. 2015. Patterns of Cross-Ecosystem Food Subsidies to Rearing Salmonids within a Large Glacial Alaskan River. American Fisheries Society national meeting. Portland, OR
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August 2015
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This study aimed to determine large-scale patterns in contributions of terrestrial, riverine, and marine food subsidies to juvenile salmonids in the large, glacially influenced Susitna River, Alaska. Stable isotope mixing models showed that the relative contribution of marine-derived nutrients to juvenile Chinook and Coho salmon increased from June to October, with availability of salmon eggs. Diet patterns differed by macrohabitat type, with aquatic and terrestrial invertebrates dominating in
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Richard Birdsey, Yude Pan, A. David McGuire1, Fangmin Zhang, Jing Chen. Past and Prospective Carbon Stocks of United States Forests: Implications for Research Priorities and Mitigation Policies. AGU Fall Meeting 2014.
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December 2014
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Projections of the future U.S. C sink have raised concerns that it may disappear in a few decades because of slower growth, continued losses of forest area, and increasing demand for timber products especially bioenergy. However, continuing atmospheric and climate changes may delay this projected decline in the sink strength for another 50 years or longer. Research is urgently needed to improve projections of land-use changes and demand for timber, quantify the large-scale effects of atmospher
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Ramankutty, N., A. McGuire, and Carbon Cycle Model Linkage Project Participants. July 2001. The effects of historical changes in global agricultural land on the terrestrial carbon cycle. International Geosphere-Biosphere Programme Global Change Open Science Conference, Amsterdam.
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May 2001
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Powell, Abby N., Emily L Weiser, and Stacia A. Backensto. 2011. Diets of two human-subsidized predators, common raven and glaucous gull, on Alaska's coastal plain. Poster. 18th Annual Conference, The Wildlife Society, Waikoloa, Hawaii.
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November 2011
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Powell, A. N., R. Suydam, and R. McGuire. Breeding biology and habitat use of king eider on the coastal plain of northern Alaska. CMI Annual Research Review, University of Alaska, Fairbanks.
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March 2005
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Powell, A. N., R. Bentzen, and S. Oppel. 2013. Survival, site use, and fidelity of king eiders: a large, multiple year study. 29 January, North American Duck Symposium, Memphis, TN.
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January 2013
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We report on the results of 8 years of satellite telemetry data, focusing on age groups that were previously unstudied. We present information on how satellite telemetry data can be used for more than locations (survival estimates, site fidelity, etc.).
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Powell, A. N., E. Rexstad, E. Taylor, and L. Phillips. Importance of the Beaufort Sea to king eiders (Somateria spectabilis). CMI Annual Review, University of Alaska, Fairbanks.
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March 2005
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Powell, A. N., A. Taylor, and R. Lanctot. 2008. Distribution and movements of staging shorebirds on Alaska's north slope. 30 October, 11th Annual MMS Information Transfer Meeting, Anchorage, Alaska.
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October 2008
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Powell, A. N. and S. Oppel. 2009. Movements and survival of first- and second-year king eiders in the Bering and Chukchi Seas. 16th Wildlife Society Conference, Monterey, CA.
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September 2009
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Powell, A. N. and S. Oppel. 2008. Movements and survival of king eiders during their first year at sea. 15 November, 3rd North American Sea Duck Conference, Quebec City, Canada.
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November 2008
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Powell, A. N. and S. Backensto. 2010. Nesting ecology of Common Ravens in an Arctic industrial landscape. The Wildlife Society, 17th Annual Conference, Snowbird, UT.
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October 2010
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Powell, A. N. and S. A. Backensto. Foraging ecology of common ravens (Corvus corax) on Alaska's coastal plain. CMI Annual Research Review, University of Alaksa, Fairbanks.
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March 2005
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Powell, A. N. and R. L. Bentzen. 2012. Using satellite telemetry to determine survival and movements of juvenile sea ducks. Microwave Telemetry, Inc. 2012 Avian and Marine Tracking Conference, Columbia, MD.
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March 2012
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Powell, A. N. and C. L. Fritz. September 2001. Breeding biology and population trends of western snowy plovers on Marine Corps Camp Pendleton, 1994-1999. The Wildlife Society 8th Annual Conference, Reno/Tahoe, Nevada.
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September 2001
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Powell, A. N. and A. Taylor. Pre-migratory movements and physiology of shorebirds staging on Alaska's North Slope. CMI Annual Review, University of Alaska, Fairbanks.
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March 2005
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Powell, A. N. 2002. Are southern California's fragmented salt marshes capable of sustaining populations of Belding's Savannah sparrows? Invited Speaker; Animals of Tidal Marshes Symposium, 25 October 2002, Patuxent, MD.
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October 2002
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Phillips, L.M., A.N. Powell, and R. Rexstad. 2005. Large scale movements and habitat characteristics of king eiders throughout the nonbreeding season. 2nd North American Sea Duck Conference, Annapolis, MD.
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November 2005
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Phillips, L., A. Powell, E. Taylor. 2005. Use of the Beaufort Sea by King Eiders. 15 March, 10th Annual MMS Information Transfer Meeting, Anchorage, AK.
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March 2005
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Phillips, L., A. N. Powell, and E. Taylor. 2004. Molt migration and ecology of King Eiders. Annual Meeting, American Ornithologists Union, Quebec City, QC, Canada. 16-21 August 2004.
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August 2004
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Phillips, L. and A. N. Powell. 2005. Large-scale movements and habitat use of King Eiders throughout the nonbreeding season. Annual Meeting, Pacific Seabird Group/Waterbird Society Meeting, 19-23 January, Portland, OR.
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January 2005
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Phillips, L. M., A. N. Powell, and E. Taylor. 2005. Use of the Beaufort Sea by king eiders. 2nd North American Sea Duck Conference, Annapolis, MD.
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November 2005
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Phillips, L. M., A. N. Powell, and E. J Taylor. 2002. Importance of the Alaskan Beaufort Sea to king eiders during fall migration. Poster; North American Sea Duck Conference, 6-10 November 2002, Victoria, B.C.
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November 2002
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Phillips, L. M. and A. N. Powell. 2005. Use of the Beaufort Sea by king eiders. 29th Waterbird Society Meeting, Jeckyll Island, GA.
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October 2005
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Perry, M.T., N.F. Hughes, M.S. Wipfli, J.R. Neuswanger, and M.J. Evenson. November 2009. Growth responses of juvenile Chinook salmon (Oncorhynchus tshawytscha) to food abundance and temperature in the Chena River, interior Alaska. American Fisheries Society Alaska Chapter annual meeting, Fairbanks, AK. (AFS abstract)
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November 2009
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Perry, M.T., N.F. Hughes, M.S. Wipfli, J.R. Neuswanger, and M.J. Evenson. April 2010. Summer growth of juvenile Chinook salmon (Oncorhynchus tshawytscha) in an Interior Alaskan River. American Fisheries Society Western Division meeting, Salt Lake City, UT. (AFS abstract)
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April 2010
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Perry, M.T., M.S. Wipfli, N.F. Hughes, J.R. Neuswanger, A.E. Rosenberger, and M.J. Evenson. 2012. Retrospective analysis of juvenile Chinook salmon growth in an interior Alaska river: insight into marine survival and density dependence. American Fisheries Society Alaska Chapter meeting, Kodiak, AK, 24-26 Oct.
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October 2013
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Perra, M., S. Crimmins, O. Couriot, T. Brnkman, G. Liston, A. Reinking, E. Coban, M. Mandel, N. Boelman, and E. Gurarie. 2023. Using auditory recording units to monitor insect activity and infer harassment intensity.
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May 2023
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We used audio recorders to quantify insect activity on the northern coastal plains of Alaska
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Perkin, J.S., Gido, K.B., Falke, J.A., Crockett, H.J., Sanderson, J.S., Johnson, E.R., and K.D. Fausch. Groundwater depletion in Western Great Plains projected to dry 250 stream-km of fish habitat in the next 45 years. Society for Freshwater Science Annual Meeting. Milwaukee, WI. 17-21 May 2015.
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May 2015
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Across the western Great Plains of North America, groundwater pumping for irrigated agriculture has depleted regional aquifers that sustain surface flow for native fishes.We synthesize the ecological consequences of past and expected future changes in surface flow using existing fish assemblage data collected from across the region.
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Peirce, J.M., T. Otis, M.S. Wipfli, and E.H. Follmann. 2006. Salmon escapement goals for wildlife: a case study at McNeil River, Alaska. American Fisheries Society Alaska Chapter annual meeting, Fairbanks, AK, 14-16 November.
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November 2006
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Paul, J.D., and J.A. Falke. 2023. Fine-scale prediction of freshwater habitat potential for Chinook Salmon (Oncorhynchus tshawytscha) across the Yukon and Kuskokwim river basins, Alaska. Alaska Chapter of the American Fisheries Society Annual Meeting, Fairbanks, Alaska, 27 – 31 March 2023.
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March 2023
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Research into environmental factors involved in the decline of Yukon River Chinook Salmon stocks has exposed information gaps regarding fine-scale freshwater habitat quality known to influence population productivity. We developed spatially-explicit habitat suitability models for spawning and rearing life-stages based on fluvial geomorphic attributes, and are developing a decision support tool based on input from stakeholders tailored to the specific applications of this dataset.
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Paukert, C. P. Olden, J. D., Lynch, A.J., Breshears, D. O., Chambers, R. C., Chu, C. Daly, M., Dibble, K.L., Falke, J., Issak, D., Jacobson, P., Jensen, O. P., and D. Munroe. November 2021. Climate Change Effects on North American Fishes to Inform Adaptation Strategies. American Fisheries Society Annual Meeting. Baltimore, MD
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November 2021
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This study reviewed the effects of climate change on fish and fisheries, and also provide a guide for how managers can implement strategies to project and enhance fish and fish habitat in a changing climate.
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Patil, V.,, E. Euskirchen, and B. Griffith. Interaction Between Lakes and Terrestrial Ecosystem Dynamics in the Yukon River Floodplain, USA. Poster presentation at the 2013 annual Coordinating Committee Meeting of the Alaska Cooperative Fish and Wildlife Research Unit. Fairbanks, Alaska.
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March 2013
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There is a net drying trend for lakes in National Wildlife Refuges in Alaska. The drying alters terrestrial plant community composition on lakes shores and influences C and N dynamics.
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Patil, V., and B. Griffith. 2012. Accuracy Assessment of 3 Remotely-Sensed Landcover Maps for the Yukon Flats National Wildlife Refuge. Annual Coordinating Committee Meeting, Alaska Cooperative Fish & Wildlife Research Unit, 26 March 2012, Fairbanks, AK
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March 2012
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Patil, V., E. Euskirchen, and B. Griffith. Interaction Between Lakes and Terrestrial Ecosystem Dynamics in the Yukon River Floodplain, in Interior Alaska, USA. AGU annual meeting 2012. GC23C-1086.
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December 2012
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There is a net drying of lakes in Alaskan National Wildlife Refuges. This drying has implications for plant community composition, C and N dynamics, and wildlife communities.
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Pastick, N.J. P. Duffy, H. Genet, T.S. Rupp, B.K. Wylie, K.D. Johnson, M.T. Jorgenson, N. Bliss, A.D. McGuire, E.E. Jafarov, and J.F. Knight. 2016. Historical and projected trends in landscape drivers affecting carbon dynamics in Alaska. Fall 2015 Meeting of the American Geophysical Union. Oral Presentation.
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December 2016
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Modern climate change in Alaska has resulted in widespread thawing of permafrost, increased fire activity, and extensive changes in vegetation distribution and productivity that have significant consequences for socio-ecological systems. Despite observations of the heightened sensitivity of these systems to change, there has not been a comprehensive assessment of factors that drive ecosystem changes throughout Alaska. Here we present research that improves understanding of the main drivers of t
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Parrett, L. S., B. Griffith, G. M. Carroll, and D. C. Douglas. September 2006. Dynamic habitat selection by caribou in the National Petroleum Reserve, Alaska. Session 44, The Wildlife Society 2006 Annual Meeting, Anchorage, AK.
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September 2006
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Parmentier, F.W., T.R. Christensen, L. Sorensen, S. Rysgaard, A.D. McGuire, P.A. Miller, and D.A. Walker. 2012. The impact of lower sea ice extent on arctic greenhouse gas exchange. Meeting of the American Geophysical Union, San Francisco, California.
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December 2012
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A warming induced by sea ice retreat leads to earlier snowmelt and higher land surface temperatures, leading to longer growing seasons. Longer growing seasons potentially promote the uptake of atmospheric CO2
by plants, while these same conditions also increase respiration and methane emissions.
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Parmentier, F.-J.W., W. Zhang, Y. Mi, X. Zhu, P.A. Miller, K. van Huissteden, D. Hayes, Q. Zhuang, A.D. McGuire, and T.R. Christensen. 2014. Higher methane emissions in regions of sea ice retreat. European Geophysical Union, Vienna, Austria.
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April 2014
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The output from three regional methane models (LPJ-GUESS WhyMe, Peatland-VU and TEM6), designed to be applied to the Arctic Region, are compared to sea ice decline. A similar spatial response to sea ice retreat by these models will increase our confidence that methane emissions in the Arctic are indeed spatially
linked to sea ice decline.
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Parmentier, F-J., T.R. Christensen, L.L. Sorensen, S. Rysgaard, A.D. McGuire, P.A. Miller, and D.A. Walker. 2013. The impact of a low sea ice extent on arctic greenhouse gas exchange. Annual Meeting of the European Geophysical Union, Vienna, Austria.
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April 2013
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This review assesses how our current
understanding of the Arctic Ocean and high latitude ecosystems can be used to predict the impact of a
lower sea ice extent on Arctic greenhouse gas exchange.
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PASTICK, NEAL, J., M. TORRE JORGENSON, BURKE J. MINSLEY, BRUCE K. WYLIE, DANA R.N. BROWN, HÉLÈNE GENET, KRISTOFER D. JOHNSON, A. DAVID MCGUIRE, M. ANDY KASS, AND JOSEPH F. KNIGHT. 2015. Towards a better understanding of the sensitivity of permafrost and soil carbon to climate and disturbance-induced change in Alaska. Fall Meeting of the American Geophysical Union. Poster Presentation.
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December 2015
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Here we present research aimed at characterizing the sensitivity of different permafrost landscapes to climate and disturbance-induced change through a compilation of in-situ observations, remote sensing and geophysical data, time series analyses, and spatio-temporal modeling. Our data-driven approach allowed for the development of a quantitative assessment of permafrost’s potential response to climate change.
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O’Donnell, J.A., J.W. Harden, V.E. Romanovsky, M.Z. Kanevskiy, M.T. Jorgenson, S.E. Ewing, A.D. McGuire, and Y. Shur. December 2009. Permafrost controls on soil C storage and turnover in upland black spruce ecosystems of interior Alaska. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2009
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O’Donnell, J.A., J.W. Harden, A.D. McGuire, V.E. Romanovsky, M.Z. Kanevskiy, and T. Jorgenson. December 2010. Soil carbon accumulation and loss in Alaska’s boreal forest: Exploring the interactive effects of wildfire and permafrost thaw. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2010
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Overduijn. K., A. N. Powell and C. Handel. 2012. Brood movement and habitat use by American and Pacific Golden-Plovers. 23 Oct, 15th Annual Alaska Bird Conference, Anchorage, AK.
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October 2012
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Overduijn, K., C. M. Handel, and A. N. Powell. 2014. Nest site selection by American and Pacific Golden-Plovers. 16th Alaska Bird Conference, Juneau, AK.
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December 2014
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We examine nest site selection of two sympatric species of plovers in western Alaska.
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Overduijn, K. S., C. M. Handel, and A. N. Powell. 2013. Brood movement and habitat use by American and Pacific Golden-Plovers. Alaska Chapter of The Wildlife Society Annual Meeting, Fairbanks, AK.
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April 2013
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We present preliminary data from an ongoing study of two sympatrically breeding shorebird species in Alaska's subarctic region.
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Overduijn, K, S., C. M. Handel, and A. N. Powell. 2013. The effects of habitat change on shorebirds in the Arctic. 5th Western Hemisphere Shorebird Conference, Santa Marta, Colombia.
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September 2013
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We present preliminary data on two sympatric species of plover nesting in Alaska's Seward Peninsula, with respect to potential increased shrubification.
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Otis, E.O., J.M. Peirce, M.S. Wipfli, and E.H. Follmann. November 2010. Radio telemetry to estimate chum salmon streamlife in McNeil River, Alaska. Annual Meeting, Alaska Chapter, American Fisheries Society, Juneau, AK.
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November 2010
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Oppel, S., R. Federer, A. N. Powell, and T. Hollmen. (2008): Effects of lipid extraction on d13C, d15N, and d34S in avian egg yolk. International Conference on the Applications of Stable Isotope Techniques to Ecological Studies, August 25-29, Honolulu, HI, USA.
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August 2008
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Oppel, S., L. Dickson, and A. Powell. 2006. Migratory patterns and winter movements of king eiders in the Bering Sea. 6 October, IV North American Ornithological Conference, Veracruz, Mexico.
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October 2006
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Oppel, S., A.N. Powell, and D. O'Brien. 2008. King eiders in northern Alaska depend on food from breeding grounds for egg production. Poster, 13th Alaska Bird Conference.
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March 2008
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Oppel, S., A. N. Powell, and D. M. O'Brien. (2008): Individual variation in nutrient allocation to egg production in an arctic sea duck. International Conference on the Applications of Stable Isotope Techniques tpo Ecological Studies, August 25-29, Honolulu, HI, USA.
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August 2008
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Oppel, S., A. N. Powell, and D. L. Dickson. 2008. Importance of the eastern Chukchi Sea for king eiders during spring and fall migration. 13th Alaska Bird Conference, Fairbanks, AK.
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March 2008
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Oppel, S. and A. N. Powell. 2009. Carbon isotope turnover as a measure of arrival time in migratory birds. 79th Cooper Ornithological Society Conference, Tucson, AZ.
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April 2009
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Oppel, S. and A. N. Powell. 2008. How important are body reserves for king eider egg formation in northern Alaska? 11 November, 3rd North American Sea Duck Conference, Quebec City, Canada.
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November 2008
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Oppel, S. and A. N. Powell. 2008. Does choice of winter region affect nesting success of nesting king eiders in northern Alaska? 11 November, 3rd North American Sea Duck Conference, Quebec City, Canada.
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November 2008
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Oppel, S. and A. N. Powell. 2008. Assigning sea ducks to wintering regions in the Bering Sea using stable isotopes of feathers. 11 November, 3rd North American Sea Duck Conference, Quebec City, Canada.
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November 2008
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Oppel, S. and A. N. Powell,2006. Migration strategies and winter movements of king eiders wintering in the Bering Sea. 10 Febraury, 11th Annual Alaska Bird Conference, Juneau, AK.
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February 2006
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Oppel, S, A. N. Powell, and D. L. Dickson. Importance of the eastern Chukchi Sea for king eiders during spring and fall migration. AOU/COS/SCO, Portland, OR.
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August 2008
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Olefeldt, D., S. Goswami, G. Grosse, D. Hayes, G. Hugelius, P. Kuhry, A.D. McGuire, V.E. Romanovsky, A.B.K Sannel, E.A.G. Schuur, and M.R. Turetsky. 2015. Thermokarst terrain: Circumpolar distribution and soil carbon vulnerability. Fall 2015 Meeting of the American Geophysical Union. Invited Oral Presentation.
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December 2015
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Here we present a first circumpolar assessment of the spatial extent and distribution of thermokarst terrain, defined as landscapes where thermokarst landforms either have developed or potentially can develop. With high soil organic carbon content, thermokarst terrain is estimated to store a disproportionate 30% of the total permafrost region soil organic carbon stock in the upper 3 meters of soil, and potentially more than half when accounting for deeper carbon stores. This first-order estimat
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O'Donnell, J. A., V. E. Romanovsky, J. W. Harden, K. Yoshikawa, and A. D. McGuire. June 2008. The effect of soil moisture and ice content on the thermal conductivity of organic soil horizons underlain by discontinuous permafrost. Ninth International Conference on Permafrost, University of Alaska Fairbanks, Fairbanks, Alaska.
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June 2008
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Nueswanger, J., N. Hughes, M. Wipfli, and A. Rosenberger. 2012. Territoriality and shadow competition within schools of juvenile chinook salmon. American Fisheries Society Annual Meeting, Minneapolis, MN.
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August 2012
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Nolan, M., R. Churchwell, J. Adams, J. McClelland, K. Tape, S. Kendall, A. Powell, K. Dunton, D. Payer, and P. Martin. 2011. Predicting the impact of glacier loss on fish, birds, floodplains, and estuaries on the Arctic National Wildlife Refuge. 4th Interagency Conference on Research in the Watersheds, Fairbanks, AK.
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September 2011
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Nicol, S., B. Griffith, J. Austen, and C. Hunter. 2012. Implications of Climate Variability for Optimal Monitoring and Adaptive Management in Wetland Systems. Final project presentation to RCRP cooperators, 28 February 2012, Seattle, WA.
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February 2012
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Neuswanger, JR, ER Schoen, CJ Volk, MS Wipfli, JW Savereide. 2020. Spatiotemporal and flow-related variability in invertebrate drift and Chinook Salmon growth in the Chena River, Alaska. Western Division American Fisheries Society annual meeting, Vancouver, BC, April 2020.
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April 2020
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Study illustrates how streamflow, temperature, and food supplies can interact to influence juvenile feeding and growth. Juvenile Chinook Salmon growth was high during the unusually warm months of June and July, 2019, and food supplies (drifting prey) increased during periods of high streamflow.
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Neuswanger, J.R., N.F. Hughes, M.S. Wipfli, and L.H. Kelly. November 2009. Improved 3-D analysis for underwater video, with applications to wild juvenile Chinook salmon foraging behavior. American Fisheries Society Alaska Chapter annual meeting, Fairbanks, AK. (AFS abstract)
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November 2009
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Neuswanger, J.R., N.F. Hughes, M.S. Wipfli, and A.E. Rosenberger. 2012. Territoriality and shadow competition within schools of juvenile Chinook salmon. American Fisheries Society annual meeting, St. Paul, MN, Aug.
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August 2013
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Neuswanger, J.R., N.F. Hughes, M.S. Wipfli, and A.E. Rosenberger. 2013. 3-D territoriality and shadow competition within schools of juvenile chinook salmon. Oral presentation given to the Alaska Chapter of the American Fisheries Society.
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October 2013
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This is the first quantiative, rigorous documentation of 3-d territories in river juvenile salmonids and probable mechanisms leading to the shape and nature of these territories.
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Neuswanger, J.R., N.F. Hughes, M. Wipfli, and A.E. Rosenberger. September 2011. The effect of drifting debris on drift-feeding fish and foraging models. Annual Meeting, American Fisheries Society, Seattle, WA.
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September 2011
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Neuswanger, J.R., M.S. Wipfli, M. Evenson, and N.F. Hughes. 2012. Effects of discharge on Chinook salmon recruitment in two interior Alaska rivers: population-level evidence and habitat-related mechanisms. American Fisheries Society Alaska Chapter meeting, Kodiak, AK, 24-26 Oct.
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October 2013
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Neuswanger, J.C., N.F. Hughes, M.S. Wipfli, and L.H. Kelly. May 2010. Improved 3-D video analysis methods, with applications to wild juvenile Chinook salmon foraging video. International Symposium: Advances in the Population Ecology of Stream Salmonids, Luarca, Asturias, Spain. (APESS abstract)
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May 2010
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Neuswanger, J.C., N.F. Hughes, M.S. Wipfli, L.H. Kelly, and A.E. Rosenberger. November 2010. The roles of territoriality and detritus in wild juvenile Chinook salmon drift-feeding behavior. Annual Meeting, Alaska Chapter, American Fisheries Society, Juneau, AK.
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November 2010
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Neuswanger, J.C., N.F. Hughes, M.S. Wipfli, L.H. Kelly, and A.E. Rosenberger. May 2010. Intra-school competition and drift-feeding behavior in wild juvenile Chinook salmon. International Symposium: Advances in the Population Ecology of Stream Salmonids, Luarca, Asturias, Spain. (APESS abstract)
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May 2010
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Neuswanger, J., N. Hughes, M.S. Wipfli, and A.E. Rosenberger. The importance of drifting debris for drift-feeding juvenile Chinook salmon. Seminar, Midnight Sun Science Symposium, Fairbanks, AK (award received). February, 2012.
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February 2012
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Provides new information on limitations to drift-feeding fishes' energy intake.
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Neuswanger, J., M. Wipfli, M. Evenson, A.E. Rosenberger, and N. Hughes. Flow-induced variability in the stock-recruitment relationships of two Interior Alaskan rivers, and related ecological mechanisms. Seminar, Arctic-Yukon-Kuskokwim Sustainable Salmon Initiative’s Chinook Salmon Synthesis Workshop, Anchorage, AK. February, 2012.
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February 2012
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Provides plausible mechanistic hypotheses accounting for recent declines in Chinook salmon abundance in the Yukon Kuskokwim drainage.
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Neuswanger, J, M Wipfli, A Rosenberger. Feeding Ecology of Juvenile Chinook Salmon in the Chena River, Interior Alaska. Western Division of the American Fisheries Society, Anchorage, Alaska, May 2018.
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May 2018
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Work shows how Juvenile Chinook Salmon compete for food resources, and how food is allocated among these young fish through their behavioral interactions.
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Neuneker, K., Falke, J., Nichols, J. and P. Richards. 2017. Migration patterns of adult Chinook Salmon in two Southeast Alaska transboundary rivers. Western Division American Fisheries Society Annual Meeting, Missoula, Montana, 22-25 May, 2017.
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May 2017
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Chinook Salmon undertake extensive migrations between food resources in the ocean and their freshwater spawning habitats, requiring them to adopt behavioral and physiological traits that will allow them to reach their spawning locations at the optimal time. Our study of the behavioral aspects of Chinook Salmon upriver migrations will help to ensure sustainable harvest of this economically important species through an improved understanding of the attributes that make successful spawners.
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Neuneker, K., Falke, J., Nichols, J. and P. Richards. 2017. Migration patterns of adult Chinook Salmon in two Southeast Alaska transboundary rivers. Alaska Chapter American Fisheries Society Annual Meeting, Fairbanks, Alaska, 19-23 March, 2017.
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March 2017
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Chinook Salmon undertake extensive migrations between food resources in the ocean and their freshwater spawning habitats, requiring them to adopt behavioral and physiological traits that will allow them to reach their spawning locations at the optimal time. Our study of the behavioral aspects of Chinook Salmon upriver migrations will help to ensure sustainable harvest of this economically important species through an improved understanding of the attributes that make successful spawners.
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Neuneker, K., Falke, J., Jaecks, T., Richards, P., and P. Etherton. 2015. Distribution and movement rates of Chinook Salmon Onchorhynchus tshawystcha in the Stikine River based on radio telemetry. Alaska Chapter American Fisheries Society Annual Meeting, Homer, Alaska, 4-6 November, 2015.
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November 2015
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In order to better understand the spawning distribution, dropout rates and migration rates of Chinook Salmon in the Stikine River, a radio telemetry study was conducted from May-August 2015.Information from this project can be used to validate and inform current mark-recapture studies and escapement estimates and help fisheries managers set more accurate harvest limits for Chinook salmon.
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Neuneker, K., Falke, J., Cox, M., Nichols, J. 2018. Proximate composition and bioelectrical impedance analysis of Yukon River Chinook Salmon. Western Division American Fisheries Society Annual Meeting, Anchorage, Alaska, 21-25 May, 2018.
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May 2018
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Chinook Salmon Oncorhynchus tshawytscha undertake energetically demanding migrations wherein they must have adequate energy reserves to survive to spawning locations and successfully reproduce. The results of this study will provide researchers with benchmark estimates of lipid, water, and protein content for Chinook Salmon in Alaska and a method to non-lethally and accurately estimate energetic status for sensitive populations such as those in Yukon River basin.
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Myers-Smith, I., J. Harden, M. Wilmking, C. Fuller, A. D. McGuire, and F. S. Chapin III. April 2007. The influence of disturbance on wetland succession in a permafrost collapse, Fairbanks, Alaska. First International Symposium on Carbon in Peatlands, Wageningen, the Netherlands.
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April 2007
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Myers-Smith, I., A. D. McGuire, J. Harden, and F. S. Chapin III. September 2003. Carbon exchange along a soil moisture gradient after fire. 54th AAAS Arctic Science Conference, Fairbanks, Alaska.
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September 2003
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Myers-Smith, I. H., A. D. McGuire, J. W. Harden, and F. S. Chapin. August 2005. The influence of disturbance on carbon exchange and succession in a permafrost collape. Annual Meeting of the Ecological Society of America, Montreal, Canada.
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August 2005
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Myers-Smith, I. H., A. D. McGuire, F. S. Chapin, and J. W. Harden. December 2004. CO2 and CH4 exchange in interior Alaska: Interactions between fire, water, soils and vegetation. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2004
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Myers, B. J. E., A. J. Lynch, T. J. Krabbenhoft, R. P. Kovach, T. J. Kwak, J. A. Falke, C. Chu, D. B. Bunnell, C. P. Paukert. Global synthesis of climate change effects on inland fish. August 2016. American Fisheries Society Annual Meeting. Kansas City, Missouri.
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August 2016
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Climate change effects on inland fish manifest in non-linear and often confounding ways over varying ecoregions and time-scales. Providing current global trends in fish responses to climate change by ecological and thermal guild will help managers anticipate future changes in fish populations and develop more strategic management plans for individual species and groups.
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Muehleck, N., K. Fitzgerald, L.H. Cheng, R. Bellmore, J. Fellman, and J. Falke. 2023. Juvenile Coho Salmon growth patterns track biennial Pink Salmon spawning abundance fluctuations in a southeast Alaska watershed. Meeting of the Alaska Chapter of the American Fisheries Society. 27–31 March, 2023, Fairbanks, AK, USA.
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March 2023
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Using bioenergetic simulations and field observations of annual growth trends, we explored the hypothesis that Pink Salmon spawning abundance fluctuations confer variable foraging and growth opportunities for juvenile Coho Salmon. Our findings indicate that juvenile salmon had disparate growth outcomes in high- and low- salmon spawning abundance years highlighting the potential importance of life-history and spawning patterns to juvenile growth in coastal drainages of Southeast Alaska.
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Muehlbauer, J.D., W.T. Samuel and V.S. Zavoico. 2024. Alaskan stream macroinvertebrate diversity between burned and unburned catchments measured using eDNA. Alaska Chapter American Fisheries Society Annual Meeting, Seward, Alaska, 25-29 March 2024.
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March 2024
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This presentation describes an effort to assess stream biodiversity using environmental DNA (eDNA) rather than traditional live invertebrate sampling. It also compares results based on two different approaches (primers) for eDNA, and compares how stream biodiversity based on these results differs along a gradient of wildfire disturbance.
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Muehlbauer, J.D., T.A. Kennedy, A.N. Metcalfe, B.R. Deemer and C.B. Yackulic. 2023. Effects of experimental “Bug Flows” on aquatic insect populations downstream of a large hydropower dam. Annual Meeting, Society for Freshwater Science, 3-7 June 2023.
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June 2023
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This presentation describes results from the Bug Flows experiment on the Colorado River in Grand Canyon. It explores the impacts of Bug Flows on aquatic invertebrate populations and other ecosystems processes.
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Muehlbauer, J.D. and W.T. Samuel 2023. Comparison of eDNA primers for aquatic invertebrate diversity in Interior Alaska streams. Alaska Chapter American Fisheries Society Annual Meeting, Fairbanks, Alaska, 27-31 March 2023.
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March 2023
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Describes results of an eDNA study for freshwater biodiversity in Interior Alaska streams.
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Muehlbauer, J.D. and Gosselin, M.D. 2022. Wildfire effects on large wood in rivers: perspectives from Interior Alaska. American Fisheries Society Annual Meeting, American Fisheries Society, Spokane, Washington, 21-25 August 2022.
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August 2022
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This presentation will summarize the effects of wildfire on large woody debris export to rivers. These results will help managers understand fire impacts on freshwater ecosystems.
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Muehlbauer, J.D. 2024. Environmental flows for food webs and fishes in Grand Canyon. School of Fisheries and Aquatic Sciences Seminar Series, University of Washington, Seattle, Washington, 17 October 2024.
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October 2024
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Public seminar on Bug Flows experiment results from the Colorado River in Grand Canyon.
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Muehlbauer, J.D. 2023. Woody debris export to large rivers following wildfire. Alaska Chapter American Fisheries Society Annual Meeting, Fairbanks, Alaska, 27-31 March 2023.
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March 2023
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Describes results of a summer 2022 study investigating the effects of wildlife on large woody debris export to large rivers.
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Muehlbauer, J.D. 2023. Woody debris export to large rivers following wildfire, Alaska EPSCoR All-Hands Meeting, Girdwood, Alaska, 7-8 February 2023.
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February 2023
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Describes results of summer 2022 study on the impact of wildfires on large woody debris export to large rivers.
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Muehlbauer, J.D. 2022. Wildfire effects on large wood export to rivers: a synthesis. Joint Aquatic Sciences Meeting, Consortium of Aquatic Science Societies, Grand Rapids, Michigan, 14-20 May 2022.
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May 2022
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This presentation will summarize the effects of wildfire on large woody debris export to rivers. These results will help managers understand fire impacts on freshwater ecosystems.
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Muehlbauer, J.D. 2022. Piloting the quantification of large woody debris inputs to large rivers following wildfire. Alaska Chapter of the American Fisheries Society Annual Meeting, Virtual, 28 February-3 March 2022.
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February 2022
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This presentation describes a pilot study to assess the presence of large wood in rivers after wildfire. This wood is an important habitat resource but also an infrastructure danger.
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Muehlbauer, J. D. and D. E. Keller. 2025. Aquatic resource recovery for salmonids following stream restoration in Interior Alaska. American Water Resources Association Spring Meeting. Anchorage, AK, 28-30 April 2025.
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April 2025
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This presentation synthesizes results from my lab group on the efficacy of stream restoration in improving habitat and food web conditions for salmon and other fish species in Interior Alaska. Results will assist with guiding future restoration practice in this region.
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Morse, J. A., A. N. Powell, and M. Tetreau. 2005. The effects of recreational disturbance on beach nesters: A case study of the black oystercatcher in Alaska. 17 July, 19th Annual Meeting of the Society for Conservation Biology, Universidade de Brasilia, Brazil.
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July 2005
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Morse, J. A., A. N. Powell, and M. Tetreau. 2004. Assessing effects of recreational activity on productivity of black oystercatchers in Kenai Fjords National Park. 2004. Alaska Bird Conference, Anchorage.
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March 2004
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Morse, J. A., A. N. Powell and M. Tetreau. 2004. Productivity of Black Oystercatchers at Kenai Fjords National Park: assessing the effects of recreational disturbance. Annual Meeting, American Ornithologists Union, Quebec City, QC, Canada, 16-21 August 2004.
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August 2004
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Morse, J. A. and A. N. Powell. 2006. The effects of recreational disturbance on breeding black oystercatchers: management implications. 9 February, 11th Alaska Bird Conference, Juneau, AK.
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February 2006
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Morse, J. A. and A. N. Powell. 2006. Does recreational disturbance impact black oystercatchers breeding in Kenai Fjords National Park? 1 March, Shorebird Science in the Western Hemisphere, Boulder, CO.
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March 2006
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Michael A. Rawlins, Anthony David McGuire, John S. Kimball, Pawlok Dass, and Members of the Model Integration Team of the Vulnerability of Permafrost Carbon Research Coordination Network. Assessment of Model Estimates of Land-Atmosphere CO2 Exchange Across Northern Eurasia. AGU 2014 Fall Meeting.
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December 2014
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Here we investigate land-atmosphere carbon dioxide (CO2) dynamics through analysis of net ecosystem productivity (NEP) and the component fluxes of gross primary productivity (GPP) and ecosystem respiration (ER) and soil carbon residence time as simulated by a set of process models over a region spanning the drainage basin of northern Eurasia. Our analysis points to improvements in model elements controlling vegetation productivity and soil respiration as being most beneficial for reducing uncer
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Meyer, B., M Wipfli, D Rinella, E Schoen, J Falke. Growth and Foraging Patterns of Juvenile Chinook and Coho Salmon in Three Geomorphically Distinct Sub-Basins of the Kenai River. Western Division of the American Fisheries Society annual conference, Anchorage, Alaska, May 2018.
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May 2018
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Work shows how climate and landscape change is predicted to change rearing habitats for Chinook and Coho salmon within the Kenai River watershed. A diverse portfolio of habitats will help protect and sustain salmon populations in the future.
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Meyer, B, M Wipfli, D Rinella, E Schoen, J Falke. 2020. Landscape diversity filters climate change influence on juvenile Chinook and Coho salmon rearing habitat in the Kenai River. Alaska Chapter of the American Fisheries Society, Fairbanks, AK.
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March 2020
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Project addresses the role of temperature and food supplies, as influenced by climate change, on Chinook and Coho salmon growth. Results show that glacially influenced rivers are more buffered and less susceptible to warming effects than rivers not influenced by glacial melt.
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Meyer, B, M Wipfli, D Rinella, E Schoen, J Falke. 2019. Climate warming effects on juvenile Chinook and Coho salmon growth are modulated by glacial-coverage in sub-basins of the Kenai River watershed. Mat-Su Salmon Symposium. Nov 2019, Palmer, AK.
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November 2019
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Study shows how water temp, modulated by glacial coverage, will change and affect rearing salmon in Alaska streams. Glacially-influenced watersheds buffer against warming air temperatures in a changing climate.
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Meyer, B, M Wipfli, D Rinella, E Schoen, J Falke. 2017. Growth and Foraging Patterns of Juvenile Chinook and Coho Salmon in Three Geomorphically Distinct Sub-Basins of the Kenai River. Alaska Chapter AFS-AWRA, Fairbanks, AK
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March 2017
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We documented how habitat and food might be changing for juvenile salmon on a major salmon producing river in Alaska. Some streams appear to be at risk in a warming climate, while others may benefit from warmer temperatures.
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Meyer, B, M Wipfli, D Rinella, E Schoen, J Falke. 2017. Growth and Foraging Patterns of Juvenile Chinook and Coho Salmon in Three Geomorphically Distinct Sub-Basins of the Kenai River. AFS, Missoula, MT
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May 2017
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Work documented how habitat and food might be changing for juvenile salmon on a major salmon producing river in Alaska. Some streams appear to be at risk in a warming climate, while others may benefit from warmer temperatures.
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Meyer, B, M Wipfli, D Rinella, E Schoen, J Falke. 2017. Growth and Foraging Patterns of Juvenile Chinook and Coho Salmon in Three Geomorphically Distinct Sub-Basins of the Kenai River. Society of Freshwater Science, Raleigh, NC
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June 2017
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Study showed how habitat and food might be changing for juvenile salmon on a major salmon producing river in Alaska. Some streams appear to be at risk in a warming climate, while others may benefit from warmer temperatures.
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Meyer, B, E Schoen, J Neuswanger, C Volk, M Wipfli, B McKenna. Short-term effects of wildfire on juvenile Chinook salmon in the Chena River. 2020 Mat-Su Salmon Symposium. 19 Nov 2020.
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November 2020
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We investigated the effects of wildfire on food resources and Chinook salmon growth on the Chena River. Fire seems to increase food abundance in the short term in smaller tributary streams that feed into the mainstem, but also increase sediment loading.
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Meyer, B, D Rinella, M Wipfli. 2015. Effects of temperature regime on juvenile Chinook and Coho salmon growth in three geomorphologically distinct sub-basins of the Kenai River. AK AFS
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November 2015
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Shows how temperature in three geomorphologically distinct watersheds on the Kenai Peninsula is expected to affect Coho and Chinook salmon. Climate change will variably affect water temperatures as a function of watershed type, and therefore affect juvenile salmonds differently across sub-basins.
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Metcalfe, A.N., T.A. Kennedy, C.A. Fritzinger, M.J. Dodrill, C.M. Szydlo, J.D. Muehlbauer, C.B. Yackulic, B.P. Holton, L.E. Durning, J.B. Sankey and T.J. Weller. 2022. Insectivorous bat foraging along the Colorado River in Grand Canyon is determined by the availability of aquatic flies (Diptera). 16th Biennial Conference of Science & Management on the Colorado Plateau & Southwest Region, Flagstaff, Arizona, 12-15 September 2022.
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September 2022
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Presentation on effects of aquatic insect on bat feeding in Grand Canyon National Park
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Metcalfe, A.N., T.A. Kennedy and J.D. Muehlbauer. 2024 Sticky situation: Insights from 12 years of monitoring emergent aquatic insects along the Colorado River in Grand Canyon. Society for Freshwater Science Annual Meeting. 2-6 June 2024.
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June 2024
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This presentation describes 12 years of monitoring data of aquatic insect emergence along the Colorado River in Grand Canyon using two different methods: sticky traps and light traps. We discuss the pros and cons of the two methods. Our results provide fodder for managers and researchers considering the addition of emergent insect sampling to their monitoring programs.
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Metcalfe, A., T. Kennedy, J. Muehlbauer, M. Dodrill, T. Weller, J. Sankey, L. Durning and C. Fritzinger. 2022. The role of insect abundance and riparian vegetation in driving bat foraging activity in Grand Canyon: insights from a community science project. Glen Canyon Dam Adaptive Management Program Annual Reporting Meeting, Virtual, 11-12 January 2022.
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January 2022
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This was a presentation at an annual stakeholder meeting. It describes the relationship between aquatic insect abundance and bat activity in the Colorado River in Grand Canyon.
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Merritt R Turetsky, Eugenie Susanne Euskirchen, Claudia I Czimczik, Mark P Waldrop, David Olefeldt, Zhaosheng Fan, Evan S Kane, Anthony David McGuire, Jennifer W Harden. Controls on northern wetland methane emissions: insights from regional synthesis studies and the Alaska Peatland Experiment (APEX). AGU 2014 Fall Meeting.
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December 2014
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At the Alaska Peatland Experiment, we are quantifying CH4 emission using static chambers, automated chambers, and towers. Our results thus far have documented the importance of soil rewetting in governing large CH4 fluxes from northern wetland soils. The APEX time series datasets are being used in a variety of modeling studies, from small-scale soil pore and microbial controls on gas production and transport to regional scale assessments of how carbon cycle feedbacks to climate vary with wetlan
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Merems, J.L., A. Brose, S.M. Crimmins, J.L. Price Tack, T.R. Van Deelen. 2020. Effects of wolves on elk habitat use in Wisconsin. Annual Conference of The Wildlife Society.
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September 2020
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Modeling the impacts of wolves on elk habitat use and population dynamics. Results will lead to improved management and monitoring of restored elk populations in Wisconsin.
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Mellon, C.D., M.S. Wipfli, and J.L. Li. 2006. Headwater streams and wildfire: short-term disturbance effects following a stand-replacing fire in northeastern Washington. North American Benthological Society annual meeting, Anchorage, AK, 4-8 June.
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June 2006
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Mellon, C.D., M.S. Wipfli, and J.L. Li. 2005. Wildfire and headwater stream productivity: Effects of intense fire on food subsidies to downstream and riparian habitats in eastern Washington. American Geophysical Union / North American Benthological Society joint assembly conference. New Orleans, LA.
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May 2005
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Mellon, C.D., M.S. Wipfli, J.L. Li, D.W. Peterson. 2007. Effects of forest fire on invertebrate dispersal from headwater streams to riparian and downstream habitats in eastern Washington. Special Workshop, Riparian Management in Headwater Catchments: Translating Science into Management. University of British Columbia, Vancouver, BC, Canada. 19-21 February.
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February 2007
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Melillo, J., H. Tian, A. McGuire, and D. Kicklighter. July 2001. Nitrogen controls on carbon sequestration. International Geosphere-Biosphere Programme Global Change Open Science Conference, Amsterdam.
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July 2001
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Melillo, J. M., H. Tian, D. W. Kicklighter, A. D. McGuire, B. Moore III, and C. J. Vorosmarty. December 2000. Ecological constraints on carbon sequestration in North America. American Geophysical Union Fall Meeting, San Francisco.
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December 2000
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Meier, R., J. Harden, C. Silapaswan, D. Swanson, Q. Zhuang, and A. D. McGuire. December 2000. Characterization of soil drainage classes for the study of soil carbon storage in Alaska. American Geophysical Union Fall Meeting, San Francisco.
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December 2000
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Medhurst, R.B., M.S. Wipfli, C.A. Binckley, J.Y. Kill, and K.P. Polivka. 2007. Differences in headwater stream invertebrate communities across logging and climatic gradients in the Cascade Range, Washington. North American Benthological Society annual meeting, Columbia, S.C., 3-8 June.
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June 2007
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Medhurst, R.B., C.A. Binckley, J.Y. Kill, M.S. Wipfli, and K. Polivka. 2006. Aquatic invertebrate community structure across climatic and disturbance gradients in the Northern Cascade Range, Washington. North American Benthological Society annual meeting, Anchorage, AK, 4-8 June.
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June 2006
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McMillan, T., S. Kendall, F. Huettmann, C. Villa, and A. Powell. 2009. Smith's longspur density and distribution in the Brooks Range, Alaska. 79th Cooper Ornithological Society Conference, Tucson, AZ.
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April 2009
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McMillan, T., F. Huettmann, and A. N Powell. 2008. Modeling Smith's longspur distribution in Alaska's Brooks Range. 13th Alaska Bird Conference.
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March 2008
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McGuire, R., L. Phillips, A. N. Powell, and R. Suydam. 2004. Factors influencing king eider nest survival on Alaska's North Slope. 16 March 2004, Alaska Bird Conference, Anchorage.
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March 2004
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McGuire, R., A. Powell, and R. Suydam. 2006. Eider one problem of another: Identifying egg predators through digital photography. 18 February, Pacific Seabird Group, Girdwood, AK.
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February 2006
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McGuire, R., A. Powell, and R. Suydam. 2005. Incubation behavior of king eiders on Alaska's coastal plain. Second North American Sea Duck Conference, Annapolis, MD.
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November 2005
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McGuire, R. and A. Powell. 2005. Incubation behavior of king eiders on the North Slope of Alaska. Annual Meeting, Pacific Seabird Group/Waterbird Society Meeting, 19-23 January, Portland, OR.
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January 2005
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McGuire, R. L., L. Phillips, R. Suydam, and A. N. Powell. 2002. Breeding biology and habitat use by king eider at Teshekpuk Lake and Kuparuk oil fields on the north slope of Alaska. Poster; North American Sea Duck Conference, 6-10 November 2002, Victoria, B.C.
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November 2002
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McGuire, A.D.. T. Schuur, and C. Schadel. Thawing, greening, browning, and other issues affecting C dynamics in the permafrost region. 2016. Third Carbon from Space Workshop: Reconciling the Land, Ocean, and Atmospheric Components of the Carbon Cycle. University of Exeter, Exeter, United Kingdom. Oral Presentation. Invited.
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January 2016
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I communicated the current understanding of the role of thawing, greening, browning, and other issues affecting C dynamics in the permafrost region. I also informed the workshop of the new synthesis activities of the Permafrost Carbon Network.
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McGuire, A.D., and Members of the Permafrost Carbon Vulnerability Research Coordination Modeling Working Group. 2014. Retrospective and future assessments of the vulnerability of permafrost and carbon in the earth system: Comparison of dynamics among process-based models. Third Carbon Pools in Permafrost Regions Workshop. Stockholm, Sweden. Invited.
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May 2014
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The results of the retrospective analyses of this study indicate that there are a number of conceptual issues that should be addressed in models that are to be used to assess the vulnerability of permafrost and carbon storage in the permafrost region.
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McGuire, A.D., and Members of the Model Integration Team of the Vulnerability of Permafrost Carbon Research Coordination Network. 2013. The vulnerability of permafrost carbon: A retrospective analysis of changes in permafrost area and carbon storage simulated by process-based models between 1960 and 2009. Meeting of the American Geophysical Union, San Francisco, California. Invited.
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December 2013
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We conducted a retrospective (1960 - 2009) comparison of how large-scale models represent permafrost carbon dynamics. . Some of the models are clearly showing a deceleration in the accumulation of soil carbon during the last fifty years. These results suggest that RH may generally overtake NPP in the future to result in net losses of carbon from permafrost zone soils.
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McGuire, A.D., and Members of the Alaska Land Carbon Assessment Team. 2015. A synthesis of terrestrial carbon balance of Alaska and projected changes in the 21st Century: Implications for climate policy and carbon management at local, regional, national, and international scales. North American Carbon Program Meeting. Washington, DC.
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January 2015
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To better understand how carbon responses in Alaska might influence national climate and carbon management policies, the U.S. Geological Survey, in collaboration with the U.S. Forest Service and university scientists, has conducted a comprehensive assessment of the historical and projected carbon balance for Alaska. This assessment of carbon dynamics in Alaska includes (1) syntheses of soil, vegetation, and surface water carbon stocks and fluxes in Alaska, and (2) state of the art models of fir
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McGuire, A.D., T.S. Rupp, and W. Kurz. 2013. Challenges in modelling disturbance regimes and their impacts in arctic and boreal ecosystems. Meeting of the American Geophysical Union, San Francisco, California. Invited.
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December 2013
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Disturbances in arctic and boreal terrestrial ecosystems influence services provided by these ecosystems to society. Our comparison of what is known about the drivers and impacts of these disturbance regimes indicates that the accurate prediction of fire regimes in arctic and boreal regions is nearest a maturity stage for incorporation into Earth System Models. Rapid progress is needed in modeling changes in other disturbance types and their impacts to facilitate their incorporation into Earth
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McGuire, A.D., T.S. Rupp, A. Breen, E. Euskirchen, and V. Romanovsky. 2014. The Integrated Ecosystem Model (IEM) for Alaska and Northwest Canada: An interdisciplinary tool to assess the responses of natural resources to climate change. US – International Association of Landscape Ecologists Annual Symposium. Anchorage, Alaska. Invited.
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May 2014
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We asynchronously coupled the three models to evaluate the long term effects of changes in climate and fire regime on vegetation distribution, soil organic horizons, and permafrost dynamics at 1km x 1 km resolution for Alaska and Northwest Canada. The simulated changes in landscape structure and function have important implications for the management of natural resources in Alaska and Northwest Canada.
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McGuire, A.D., T.R. Christensen, D.J. Hayes, A. Heroult, J.S. Kimball, C. Koven, P. Lafleur, P. Miller, W.C. Oechel, S. Sitch, and M.D. Williams. December 2011. An assessment of the carbon balance of Arctic tundra: Comparisons among observations, process models, and atmospheric inversions. Fall Meeting of the American Geophysical Union, San Francisco, CA. Invited.
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December 2011
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McGuire, A.D., S.T. Rupp, A. Bennett, W.R. Bolton, A. Breen, E.S. Euskirchen, T. Kurkowski, S.S. Marchenko, V.E. Romanovsky, M.P. Waldrop, and F. Yuan. 2012. The Alaska Integrated Ecosystem Model: An interdisciplinary tool to assess the responses of natural resources in Alaska to climate change. Meeting of the American Geophysical Union, San Francisco, California.
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December 2012
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These results suggest that there are important linkages between the fire regime, forest composition, and the structure of soil organic horizons that influence the vulnerability of permafrost degradation in interior Alaska. These changes in landscape structure and function have important implications for the management of natural resources in Alaska.
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McGuire, A.D., J.W. Harden, S. Yi, D.A. Hayes, E. Euskirchen, D.W. Kicklighter, Q. Zhuang, K. Manies, and M. Turetsky. September 2009. Meeting challenges in modeling carbon-climate feedbacks of northern high latitude ecosystems. International Conference on the Role and Importance of Peatlands in the Global Carbon Cycle: Past, Present, and Future, Prague, The Czech Republic. Invited.
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September 2009
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McGuire, A.D., Helene Genet, and Members of the Alaska Land Carbon Assessment Team. 2015. A synthesis of carbon balance of Alaska and projected changes in the 21st Century: Implications for climate policy and carbon management at local, regional, national, and international scales. International Boreal Forest Research Association Meeting. Rovenemi, Finland.
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May 2015
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To better understand how carbon responses in Alaska might influence national climate and carbon management policies, the U.S. Geological Survey, in collaboration with the U.S. Forest Service and university scientists, has conducted a comprehensive assessment of the historical and projected carbon balance for Alaska. This assessment of carbon dynamics in Alaska includes (1) syntheses of soil, vegetation, and surface water carbon stocks and fluxes in Alaska, and (2) state of the art models of fir
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McGuire, A.D., H. Genet, Y. He, S. Stackpoole, D. D’Amore, T.S. Rupp, B. Wylie, X. Zhou, and Z. Zhu. 2016. The Alaska Land Carbon Assessment: Baseline and Projected Future Carbon Storage and Greenhouse-gas Fluxes in Ecosystems of Alaska. Interagency Arctic Research Policy Committee (IARPC) Wildfire Collaboration Team Meeting. Oral Presentation. Invited.
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February 2016
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The Alaska Land Carbon Assessment was conducted to inform mitigation and adaptation policies and land management decisions at sub-regional, regional, and national scales. Ecosystem carbon balance of Alaska was estimated for two time periods, a historical period (1950-2009) and a projected period (2010-2099) by synthesizing results for upland, wetland, and inland aquatic ecosystems.
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McGuire, A.D., H. Genet, Y. He, S. Stackpoole, D. D’Amore, T.S. Rupp, B. Wylie, X. Zhou, and Z. Zhu. 2015. The Alaska Land Carbon Assessment: Baseline and Projected Future Carbon Storage and Greenhouse-gas Fluxes in Ecosystems of Alaska. Fall 2015 Meeting of the American Geophysical Union. Oral Presentation. Invited.
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December 2015
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The Alaska Land Carbon Assessment was conducted to estimate: 1) the amount of carbon stored in ecosystems of Alaska, 2) the capacity of ecosystems to sequester carbon, the rate of greenhouse-gas fluxes (GHG) in and out of the ecosystems, and 3) evaluation of the effects of the natural and anthropogenic processes or driving forces such as wildfire that control ecosystem carbon balance and GHG fluxes. Information derived from this assessment is intended to inform mitigation and adaptation policie
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McGuire, A.D., E.S. Euskirchen, D.J. Hayes, M. Balshi, Q. Zhuang, D.W. Kicklighter, and J.M. Melillo. December 2009. Assessing the potential effects of northern high latitude terrestrial ecosystems on the climate system. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2009
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McGuire, A.D., D.J. Hayes, T.R. Christensen, A. Heroult, E.S. Euskirchen, J.S. Kimball, C. Koven, P. Lafleur, P. Miller, W.C. Oechel, P. Peylin, M.D. Williams, and Y. Yi. 2013. An assessment of the carbon balance of arctic tundra in North America: Comparisons among observations, process models, and atmospheric inversions. Fourth North America Carbon Program All Investigators Meeting, Albuquerque, New Mexico.
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February 2013
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The central estimates of the observations, process-based models, and inversion models each identify stronger sinks in the 2000s compared with the 1990s.
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McGuire, A.D., D.J. Hayes, G. Stinson, D. Turner, Y. Wei, L.S. Heath, W. Kurz, T.O. West, B. McConkey, B. de Jong, D.N. Huntzinger, W.M. Post, R.B. Cook, and NACP Regional Synthesis Participants. February 2011. Towards better-constrained assessments of the carbon balance of North America in the 21st Century: A comparison of recent model and inventory-based estimates. Third North American Carbon All-Investigators Meeting, New Orleans, LA.
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February 2011
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McGuire, A.D., D.J. Hayes, D.W. Kicklighter, Q. Zhuang, M. Chen, K.R. Gurney, J.W. McClelland, J.M. Melillo, B.J.Peterson, and R.G. Prinn. July 2010. Analysis of the carbon balance of boreal Asia from 1997–2006. International Conference on Environmental Observations, Modeling and Information Systems, Tomsk, Russia.
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July 2010
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McGuire, A.D., D.J. Hayes, D.W. Kicklighter, M. Manizza, Q. Zhuang, M. Chen, M.J. Follows, K.R. Gurney, J.W. McClelland, J.M. Melillo, and B.J. Peterson. March 2010. The changing carbon cycle of the Arctic. State of the Arctic Conference, Miami, FL.
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March 2010
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McGuire, A.D., D.J. Hayes, D.W. Kicklighter, M. Manizza, Q. Zhuang, M. Chen, M.J. Follows, K.R. Gurney, J.W. McClelland, J.M. Melillo, B.J. Peterson, and R.G. Prinn. September 2009. An analysis of the carbon balance of the Arctic Basin from 1997-2006. Eighth International Carbon Dioxide Conference, Jena, Germany.
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September 2009
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McGuire, A.D., D. Lawrence, E. Burke, G. Chen, E. Jafarov, C. Koven, A. MacDougall, D. Nikolsky, S. Peng, and A. Rinke. 2015. The Temporal Evolution of Changes in Carbon Storage in the Northern Permafrost Region Simulated by Carbon Cycle Models between 2010 and 2300: Implications for Atmospheric Carbon Dynamics. Fall 2015 Meeting of the American Geophysical Union. Oral Presentation.
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December 2015
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We conducted an assessment of changes in permafrost area and carbon storage simulated by 8 process-based models between 2010 and 2300. These results suggest that the permafrost carbon feedback would not have substantial consequences until after 2100, and that effective mitigation efforts during this century have the potential to prevent the negative consequences of the permafrost carbon feedback.
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McGuire, A.D., D. Lawrence, E. Burke, G. Chen, E. Jafarov, C. Koven, A. MacDougall, D. Nicolsky, S. Peng, and D. Ji. 2016. The Temporal Evolution of Changes in Carbon Storage in the Northern Permafrost Region Simulated by Carbon Cycle Models between 2010 and 2300: Implications for Atmospheric Carbon Dynamics. Eleventh International Conference on Permafrost. Potsdam, Germany. Oral Presentation. Invited.
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June 2016
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We conducted an assessment of changes in permafrost area and carbon storage simulated by 8 process-based models between 2010 and 2300. These results suggest that the permafrost carbon feedback would not have substantial consequences until after 2100, and that effective mitigation efforts during this century have the potential to prevent the negative consequences of the permafrost carbon feedback.
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McGuire, A.D. and T.R. Christensen. October 2010. Regional Carbon Cycle Assessment and Processes: Arctic Tundra. Regional Carbon Cycle Assessment on Lands and Oceans Workshop, Viterbo, Italy. Invited.
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October 2010
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McGuire, A.D. and Members of the Model Integration Team of the Vulnerability of Permafrost Carbon Research Coordination Network. 2014. The Importance of Explicitly Representing Soil Carbon with Depth over the Permafrost Region in Earth System Models: Implications for Atmospheric Carbon Dynamics at Multiple Temporal Scales between 1960 and 2300. Fall Meeting of the American Geophysical Union. Invited.
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December 2014
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We conducted an assessment of changes in permafrost area and carbon storage simulated by process-based models between 1960 and 2300. These results indicate that there are substantial differences in responses of carbon dynamics between model that do and do not explicitly represent soil carbon with depth in the permafrost region.
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McGuire, A.D. September 2011. An assessment of the carbon balance of arctic tundra: Comparisons among observations, process models, and atmospheric inversions. GreenCyclesII and DEFROST Conference on Ocean-Land Interactions at High Latitudes. Nuuk, Greenland. Invited.
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September 2011
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McGuire, A.D. September 2011. An assessment of the carbon balance of Arctic tundra: Comparisons among observations, process models and atmospheric inversions. GreenCyclesII and DEFROST Conference on Ocean-Land Interactions at High Latitudes, Nuuk, Greenland. Invited.
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September 2011
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McGuire, A.D. October 2011. Identifying indicators of state change and forecasting future vulnerability in Alaska boreal ecosystems. 2011 Alaska Fire Science Workshop, Fairbanks, AK. Invited.
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October 2011
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McGuire, A.D. October 2011. DOS-TEM Modeling Perspective. Workshop to identify data needs for improving model representations of soil carbon responses to climate change in permafrost regions. Argonne National Laboratory, Chicago, IL. Invited.
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October 2011
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McGuire, A.D. October 2010. Feedbacks of northern high-latitude terrestrial ecosystems to the climate system. Department of Energy Climate Change Workshop on Experiments in High Latitude Ecosystems, Fairbanks, AK. Invited.
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October 2010
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McGuire, A.D. December 2011. The importance of representing interactions among permafrost dynamics, soil warming, and fire in modeling soil carbon responses of northern high latitude terrestrial ecosystems to climate change. Fall Meeting of the American Geophysical Union, San Francisco, CA. Invited.
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December 2011
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McGuire, A.D. December 2009. Alaska climate change impacts. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2009
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McGuire, A.D. August 2010. Recent impacts of climate change in Alaska and other boreal regions. XXIII IUFRO World Congress, Seoul, South Korea.
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August 2010
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McGuire, A.D. August 2009. The contemporary carbon cycle of the pan-Arctic: Data, models and spatial-temporal dynamics. Annual Meeting of the Ecological Society of America, Albuquerque, New Mexico. Invited.
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August 2009
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McGuire, A.D. April 2010. Keynote: Sensitivity of the carbon cycle in the Arctic to climate change. Symposium on Spatio-Temporal Patterns in the Carbon Balance of Northern High Latitude Regions. Stockholm University. Stockholm, Sweden.
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April 2010
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McGuire, A.D. 2012. Importance of Research on Climate Change in the Arctic-Boreal Region. NASA Arctic Boreal Vulnerability Experiment (ABoVE) Workshop. Boulder, Colorado. Invited.
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June 2012
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This presentation was a plenary invited presentation to talk about the importance of research on climate change in the Arctic-Boreal Region.
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McGuire, A. D., and the IGBP High Latitude Transect Working Group. April 2005. Responses of high latitude ecosystems to global change: Potential consequences for the climate system. Annual Meeting of the European Geophysical Union, Vienna, Austria. Invited.
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April 2005
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McGuire, A. D., R. A. Meier, Q. Zhuang, M. Macander, T. S. Rupp, E. Kasischke, D. Verbyla, D. W. Kicklighter, and J. M. Melillo. December 2000. The role of fire disturbance, climate, and atmospheric carbon dioxide in the response of historical carbon dynamics in Alaska from 1950 to 1955: The importance of fire history. American Geophysical Union Fall Meeting, San Francisco.
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December 2000
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McGuire, A. D., L. Anderson, T. R. Christensen, S. Dallimore, L. Guo, D. Hayes, M. Heimann, T. Lorenson, R. Macdonald, and N. Roulet. December 2007. Sensitivity of the carbon cycle in the Arctic to climate change. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2007
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McGuire, A. D., L. A. Joyce, J. S. Clein, D. P. Coulson, and T. J. Burnside. August 2004. Historical changes in carbon storage of the eastern United States: Uncertainties associated with forest harvest and agricultural activities. Annual Meeting, Ecological Society of America, Portland, OR.
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August 2004
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McGuire, A. D., L. A. Joyce, J. S. Clein, D. P. Coulson, T. J. Burnside, and J. F. Gentry. December 2004. Historical changes in carbon storage of the eastern United States: Uncertainties associated with forest harvest and agricultural activities. Fall Meeting of the American Geophysical Union, San Francisco, California.
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December 2004
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McGuire, A. D., J. S. Clein, and Q. Zhuang. October 2003. Modeling modes of variability in carbon exchange between high latitude terrestrial ecosystems and the atmosphere: A synthesis of progress and identification of challenges. Open Science Meeting, Study of Environmental Change in the Arctic (SEARCH), Seattle, WA.
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October 2003
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McGuire, A. D., J. Melillo, D. Kicklighter, and L. Joyce. December 2007. The role of nitrogen dynamics in the response of of terrestrial carbon dynamics to changes in atmospheric carbon dioxide, climate, and land use. Fall Meeting of the American Geophysical Union, San Francisco, CA. Invited.
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December 2007
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McGuire, A. D., E. S. Euskirchen, F. S. Chapin III, M. Balshi, Q. Zhuang, J. Melillo, D. Kicklighter, J. Walsh, and C. Wirth. April 2007. Integrated regional changes in arctic climate feedbacks: Implications for the global climate system. CLASSIC Workshop on Land-Atmosphere Interactions in the Arctic, Abisko, Sweden. Invited.
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April 2007
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McGuire, A. D., E. Euskirchen, F. S. Chapin III, M. Balshi, Q. Zhuang, J. Melillo, D. Kicklighter, J. Walsh, and C. Wirth. June 2006. Integrated regional changes in boreal forest climate feedbacks: Implications for the global climate system. USGS Global Change Workshop, Denver, CO.
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June 2006
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McGuire, A. D., E. Euskirchen, F. S. Chapin III, M. Balshi, Q. Zhuang, J. Melillo, D. Kicklighter, J. Walsh, and C. Wirth. August 2006. Integrated regional changes in boreal forest climate feedbacks: Implications for the global climate system. Thirteenth International Boreal Forest Research Association, Umea, Sweden.
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August 2006
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McGuire, A. D. and the IGBP High Latitude Transect Working Group. October 2001. Environmental variation, vegetation distribution, and carbon dynamics in high latitudes. International Symposium on Arctic Feedbacks to Global Change, Rovaniemi, Finland.
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October 2001
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McGuire, A. D. and the IGBP High Latitude Transect Working Group. August 2002. Environmental variation, vegetation distribution, and carbon dynamics in high latitudes. International Boreal Forest Research Association XI International Conference, Boreal Forests and the Environment: Local, Regional, and Global Scales, Krasnoyarsk, Russia. Invited.
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August 2002
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McGuire, A. D. and the IGBP High Latitude Transect Working Group. August 2001. Environmental variation, vegetation distribution, carbon dynamics, and water/energy exchange in high latitudes. Ecological Society of America Annual Meeting, Madison, Wisconsin.
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August 2001
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McGuire, A. D. and D. Zamolodchikov. April 2003. Status of modeling the location and timing of carbon sources and sinks in northern Eurasia. Northern Eurasian Earth System Partnership Initiative (NEESPI) Science Plan Workshop, Suzdal, Russia. Invited.
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April 2003
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McGuire, A. D. September 2002. Carbon cycling in extratropical ecosystems of the Northern Hemisphere during the 20th century: A modeling analysis of soil thermal dynamics. IGBP/GCTE-LCUC Transect Meeting, Guangzhou, China. Invited.
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September 2002
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McGuire, A. D. October 2000. The role of atmospheric carbon dioxide, climate, and disturbance in the carbon balance of the terrestrial biosphere in the twentieth century: Global and regional perspectives. Invited Colloquium, Center for Global and Climate Change Research, McGill University, Montreal, Canada.
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October 2000
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McGuire, A. D. November 2003. Progress and challenges in modeling soil carbon dynamics of high latitude ecosystems: Temporal and spatial perspectives. International Symposium on Boreal Forest Disturbance and Its Effects to Global Warming, Hokkaido University, Sapporo, Japan. Invited.
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November 2003
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McGuire, A. D. May 2008. Integrated regional changes in arctic ecosystem feedbacks: Implications for the global climate system. After the Melt: An International Conference on Ecological Responses to Arctic Climate Change, University of Aarhus, Aarhus, Denmark. Invited.
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May 2008
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McGuire, A. D. May 2004. Climate disturbance interactions in boreal forest ecosystems. Opening presentation, 12th Conference of the International Boreal Forest Research Association, Fairbanks, AK.
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May 2004
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McGuire, A. D. May 2001. Interactions between arctic terrestrial ecosystems and the climate system. The Arctic Forum 2001, Arlington, Virginia.
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May 2001
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McGuire, A. D. June 2003. Modeling analyses of circumpolar carbon responses to global change: Approaches and issues. International Arctic Research Center (IARC) and International Arctic Science Committee (IASC) Synthesis Workshop on Current and Future Status of Carbon Storage and Ecosystem-Atmosphere Exchange in the Circumpolar North: Processes, Budgets, and Projections, Skogar, Iceland. Invited.
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June 2003
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McGuire, A. D. June 2003. Climate change and tundra and boreal communities. A public forum and workshop on Early Warning from Alaska: Global Warming's Front Line, Alaska Conservation Foundation, Washington, DC. Invited.
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June 2003
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McGuire, A. D. December 2003. Progress and challenges in modeling soil carbon dynamics of high latitude ecosystems: Temporal and spatial perspectives. Fall Meeting, American Geophysical Society, San Francisco, CA. Invited.
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December 2003
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McGuire, A. D. December 2001. Environmental variation, vegetation distribution, and carbon dynamics in high latitudes. Fall Meeting, American Geophysical Union. Invited.
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December 2001
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McGuire, A. D. August 2005. Modeling responses of high latitude terrestrial ecosystems to global change. Annual Meeting of the Ecological Society of America, Montreal, Canada.
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August 2005
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McGuire, A. D. April-May 2006. Integrated regional changes in boreal forests: Implications for the global climate system. International Institute for Applied Systems Analysis, Laxenburg, Austria. Invited.
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May 2006
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McGuire, A. D. April 2008. Ecosystem changes/processes in high latitudes. NASA Carbon Cycle and Ecosystems Joint Science Workshop, University of Maryland, College Park, MD. Invited.
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April 2008
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McGuire, A. D. April 2003. Scaling plant gas exchange (photosynthesis, respiration): Modeling interactions between increasing temperature and atmospheric carbon dioxide. Terrestrial Ecosystems Responses to Atmospheric and Climatic Change (TERACC) Workshop on Interactions between Increasing CO2 and Temperature in Terrestrial Ecosystems, Lake Tahoe, California. Invited.
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April 2003
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McGuire, A. D. April 2003. Landscape analysis of moose distribution relative to fire history in interior Alaska. Second Biennial Alaska Refuge Biologist Conference, U.S. Fish and Wildlife Service, Cooper Landing, Alaska. Invited.
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April 2003
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McGuire, A. D. April 2003. Effects of increasing temperature and atmospheric CO2 on regional and global C storage. Terrestial Ecosystems Responses to Atmospheric and Climatic Change (TERACC) Workshop on Interactions between Increasing CO2 and Temperature in Terrestrial Ecosystems, Lake Tahoe, California. Invited.
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April 2003
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McGuire, A. D. April 2002. The role of atmospheric carbon dioxide, climate, and disturbance in the carbon balance of the terrestrial biosphere in the twentieth century: Global and regional perspectives. Workshop on Terrestrial Ecosystems Responses to Atmospheric and Climatic Change (TERACC). Durhan, NH. Invited.
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April 2002
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McFarland, J.J., M.S. Wipfli, and M.S. Whitman. 2012. Feeding ecology of arctic grayling (Thymallus arcticus) in a small beaded stream on the Arctic Coastal Plain, Alaska. American Fisheries Society Alaska Chapter meeting, Kodiak, AK, 24-26 Oct.
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October 2013
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McConnell, N.A., A.D. McGuire, J.W. Harden, E.S. Kane, and M.R. Turetsky. December 2010. Controls on ecosystem and root respiration in an Alaskan peatland. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2010
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McConnell, N., A.D. McGuire, J.W. Harden, and M.R. Turetsky. December 2011. Controls on ecosystem respiration in a peat plateau and adjacent collapse formations in interior Alaska. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2011
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McConnell, N., A.D. McGuire, J.W. Harden, E. Kane, and M.R. Turetsky. April 2011. Controls on ecosystem and root respiration in an Alaskan peatland. Annual Meeting of the European Geophysical Union, Vienna, Austria.
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April 2011
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Martin, A.N., Falke, J.A., Savereide, J.W., and J.A. Lopez. 2016. Estimating the Distribution of Juvenile Chinook Salmon (Oncorhynchus tshawytscha) Using Habitat Modeling and eDNA in an Interior Alaska River Basin. Annual Meeting of the American Fisheries Society, Kansas City, MO, 22-26 August 2016.
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August 2016
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Identification and protection of anadromous water bodies in Alaska are critical in light of increasing threats to fish populations, yet challenging given budgetary and logistical limitations. Our results will provide tools for managers to rapidly and efficiently map critical rearing habitats and prioritize sampling efforts to expand the known distribution of juvenile salmon in interior Alaska streams.
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Martin, A.N., Falke, J.A., Savereide, J.W., and J.A. Lopez. 2015. Estimating the distribution of juvenile Chinook Salmon (Oncorhynchus tshawytscha) using habitat modeling and eDNA in an interior Alaska river basin. Alaska Chapter American Fisheries Society Annual Meeting, Homer, Alaska, 4-6 November, 2015.
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November 2015
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Newly developed, non-invasive rapid-assessment techniques can reduce costs and sampling effort while increasing detectability (i.e., probability of observing an individual) across life stages. Our results will provide tools for managers to rapidly and efficiently map critical rearing habitats and prioritize sampling efforts to expand the known distribution of juvenile salmon in interior Alaska streams.
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Martin, A.N., Falke, J.A., Pomeranz, J.F., and J.W. Saveride. 2014. Habitat potential for juvenile Chinook Salmon (Oncorhynchus tshawytscha) in the Chena River basin, Alaska. Alaska Chapter American Fisheries Society Annual Meeting, Juneau, Alaska, 21-24 October 2014.
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October 2014
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It is estimated that less than 50% of potential waterbodies (e.g., streams, rivers or lakes) in Alaska have been documented as supporting anadromous fishes; however, identification and protection of unsampled waterbodies will be critical in light of increasing threats to fish populations owing to climate change, fishing pressure, and land development. Our results will help managers map critical rearing habitats, direct field research activities, and assist with prioritizing restoration actions.
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Martin, A.M., M.S. Wipfli, and R. Spangler. 2006. Aquatic community development in response to salmon carcass and salmon analog enrichment in newly-restored fish habitat, Resurrection Creek, Alaska. American Fisheries Society Alaska Chapter annual meeting, Fairbanks, AK, 14-16 November.
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November 2006
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Martin, A.E., M.S. Wipfli, R. Spangler. 2006. Freshwater community development in response to salmon carcass additions to newly created fish habitats in Alaska. North American Benthological Society annual meeting. Anchorage, AK, 4-8 June.
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June 2006
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Marchenko, S.S., H. Genet, E.S. Euskirchen, A.L. Breen, A.D. McGuire, S.T. Rupp, V.E. Romanovsky, W.R. Bolton, and J.E. Walsh. 2016. Estimating rates of permafrost degradation and their impact on ecosystems across Alaska and northwest Canada using the process-based permafrost dynamics model GIPL as a component of the Integrated Ecosystem Model (IEM). Fall 2016 Meeting of the American Geophysical Union. Oral Presentation.
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December 2016
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The modeling results indicate how different types of ecosystems affect the thermal state of permafrost and its stability. Although the rate of soil warming and permafrost degradation in peatland areas are slower than other areas, a considerable volume of peat will be thawed by the end of the current century. The release of carbon and the net effect of this thawing depends on the balance between increased productivity and respiration, which depend, in part, on soil moisture dynamics.
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Marchenko, S., Streletskiy, D., Romanovsky, V., McGuire, A.D, and Shiklomanov, N. 2015. The Vulnerability of Permafrost from 1960 to 2300 Based on Simulations of the Process-Based Model GIPL2 Across the Permafrost Region in the Northern Hemisphere: Implications for Soil Carbon Vulnerability. Fall Meeting of the American Geophysical Union. Poster Presentation.
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December 2015
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The main aim of this study is to evaluate the vulnerability of permafrost under climate warming across the Permafrost Region of the Northern and High-altitude Eurasia in respect to ecosystems stability, infrastructure, socioeconomic impact, and to estimate the volume of newly thawed soils, which could be potential source or sink of additional amount of carbon in the Earth System.
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Marchenko, S., Nicolsky, D., Romanovsky, V., McGuire, A.D. The Vulnerability of Permafrost from 1960 to 2300 Based on Simulations of the Process-Based Model GIPL2 Across the Permafrost Region in the Northern Hemisphere: Implications for Soil Carbon Vulnerability. AGU 2014 Fall Meeting.
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December 2014
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We estimated dynamics of the area and volume of seasonally thawed soils within the three upper meters across the entire Permafrost Domain. Our projections according to the CCSM4 RCP45 climate scenario indicate that the maximum unfrozen volume of soil within three upper meters would change from 11.3 to 17 Mio km3 between 2009 and 2300.
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Marchenko, S., H. Genet, E. Euskirchen, A.D. McGuire, T.S. Rupp, W.R. Bolton, A. Breen, M. Waldrop, S. McAfee, F. Yuan, Y. Zhang, V. Romanovsky, J. Walsh, T. Kurkowski, M. Lindgren, A. Bennett, M. Leonawicz, T. Carman, A. Floyd, and K. Timm. 2016. High resolution soil temperature and active layer dataset for estimating rates of permafrost degradation and their impact on ecosystems, infrastructure, CO2 and CH4 fluxes and net C storage following permafrost thaw in Alaska and Northwest Canada. Eleventh International Conference on Permafrost. Potsdam, Germany. Oral Presentation.
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June 2016
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The Soil Temperature and Active Layer Thickness (ALT) Gridded Database was developed to quantify the nature and rate of permafrost degradation and its impact on ecosystems, infrastructure, CO2 and CH4 fluxes and net C storage following permafrost thaw across Alaska and Northwest Canada. To develop this database, we used the process-based permafrost dynamics model GIPL2 developed in the Geophysical Institute Permafrost Lab, and which is the permafrost module of the Integrated Ecosystem Model for
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Marcarelli, A.M., C.V. Baxter, M. Wipfli, A.E. Kohler, S.F. Collins, J.E. Ebel, and G. Servheen. September 2011. Salmon nutrient mitigation effects on bottom-up processes in streams: Lessons from large-scale experiments in central Idaho. Annual Meeting, American Fisheries Society, Seattle, WA.
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September 2011
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Marcarelli, A., J. Ebel, C. Baxter, A. Kohler, S. Collins, M. Wipfli. 2013. Integrating ecosystem science into fisheries-targeted nutrient enhancement programs aimed to mitigate for the loss of Pacific salmon. American Fisheries Society Western Division annual meeting, Boise, ID, Apr.
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April 2013
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Manies, K., S. Yi, J. Harden, and A.D. McGuire. December 2008. Boreal forest organic soil properties: Variation within soil profiles and across landscapes. Fall Meeting of the American Geophysical Union, San Francisco, California.
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December 2008
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Maier, J. A. K., J. Ver Hoef, A. D. McGuire, H. A. Maier, L. Saperstein, and R. T. Bowyer. September 2003. Are data on fire history and landscape useful for predicting density and distribution of moose and enhancing management of populations in interior Alaska? 54th AAAS Arctic Science Conference, Fairbanks, Alaska.
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September 2003
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Macheel, C.A., R.P. Daanen, D. Misra, A.D. McGuire, M. Turetsky, and M. Waddington. December 2009. Application of in-situ measurements to characterize moisture and thermal dynamics in organic soils. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2009
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Macheel, C.A., R. Daanen, D. Misra, A.D. McGuire, M. Turetsky, M. Waddington, and E. Kane. September 2009. Numerical simulations of variably saturated flow with energy and water phase change in northern latitude peatlands. Annual meeting of the Association of Engineering and Environmental Geologists, Reno, Nevada.
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September 2009
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M.J. Lara, A.D. McGuire, E.S. Euskirchen, H. Genet, V. Sloan, C. Iversen, R. Norby, Y. Zhang, F. Yuan. Changes in landscape-level carbon balance of an arctic coastal plain tundra ecosystem between 1970-2100, in response to projected climate change. AGU 2014 Fall Meeting.
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December 2014
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We extrapolate model results at a 1km2 resolution across the ~1800 km2 Barrow Peninsula using a tundra geomorphology map, describing ten dominant geomorphic tundra types (Lara et al. submitted), to estimate the likely change in landscape-level carbon balance between 1970 and 2100 in response to projected climate change. Preliminary model runs for this region indicated temporal variability in response to carbon and active layer dynamics, specific to tundra geomorphic type. Overall, results sugge
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Lyu, Z., H. Genet, Y. He, Q. Zhuang, A.D. McGuire, A. Bennett, A. Breen, J. Clein, E.S. Euskirchen, K. Johnson, T. Kurkowski, N. Pastick, T.S. Rupp, B. Wylie, Z. Zhu. 2017. The Role of Driving Factors in Historical and Projected Carbon Dynamics in Wetland Ecosystems of Alaska. Fall 2017 Meeting of American Geophysical Union. Poster Presentation.
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December 2017
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Wetlands are important terrestrial ecosystems in Alaska. It is important to understand and assess their role in the regional carbon dynamics in response to historical and projected environmental conditions. A coupled modeling framework that incorporates a fire disturbance model and two biogeochemical models was used to assess the relative influence of changing climate, atmospheric carbon dioxide (CO2) concentration, and fire regime on the historical and future carbon balance in wetland ecosyste
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Lynch, A. J., B. J. E. Myers,, T. J. Krabbenhoft, R. P. Kovach, T. J. Kwak, J. A. Falke, C. Chu, D. B. Bunnell, C. P. Paukert. Global synthesis of the projected and documented effects of climate change effects on inland fishes. July 2017. Fisheries Society of the British Isles Annual Symposium. Exeter, United Kingdom.
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July 2017
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This study summarizes how climate change affects inland fish and fisheries at a global scale.
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Lynch, A. J., B. J. E. Myers, J. Wong, C. Chu, R. W. Tingley, III, J. A. Falke, T. J. Kwak, C. P. PaukertI, T. J. Krabbenhoft. August 2021. Fish and Climate Change (FiCli) Database: Informing management actions for responding to climate change effects in fishes. Tennessee River Basin Network annual meeting.
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July 2021
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We examined the effects of climate change on inland fishes using the Fish and Climate Change Database (FiCli).
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Lynch, A. J., B. J. E. Myers, J. Wong, C. Chu, J. A. Falke, T. J. Kwak, C. P. Paukert, R. W. Tingley, III, T. J. Krabbenhoft. November 2021. Reducing uncertainty in climate change responses for inland fisheries management: a decision-path approach. American Fisheries Society Annual Meeting.
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May 2021
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We examine the effects of climate change on inland fishes using the Fish and Climate Change Database (FiCli).
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Lynch, A. J., B. J. E. Myers, J. Wong, C. Chu, J. A. Falke, T. J. Kwak, C. P. Paukert, R. W. Tingley, III, T. J. Krabbenhoft. May 2021. Examining Climate Change Impacts using the Fish and Climate Change Database (FiCli). Western Division American Fisheries Society Annual Meeting.
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May 2021
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We examine the effects of climate change on inland fishes using the Fish and Climate Chanage Database (FiCli).
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Luo et al. (including A.D. McGuire). 2015. Representing soil carbon dynamics in global land models to improve future IPCC assessments. North American Carbon Program Meeting. Washington, DC.
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January 2015
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We held an international workshop in June 2014 with about 50 scientists from various areas of soil carbon research, including global model development, benchmark analysis, data assimilation, database development, and isotope and soil carbon measurement. The goal of the workshop was to exchange ideas on how to improve representation of soil carbon dynamics in global models. The workshop (1) evaluated current status of modeling SOC dynamics; (2) explored process understanding and modeling techniq
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Lopez, J.A., Jalbert, C., Campbell, M., Falke, J., and P. Westley. 2020. Population Genetics of a Northern Pike Invasion. American Fisheries Society Virtual Meeting, 14-25 September, 2020.
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September 2020
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In Alaska, translocated Northern Pike (Esox lucius) have founded an abundant and widely distributed invasive metapopulation. We are studying contrasting patterns of genetic variability between the invasive and native populations that are candidate sources of the translocated founders.
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Liang, J., M. Zhou, P. Tobin, and A.D. McGuire. 2013. Biodiversity increases individual productivity: Evidence and mechanism. Society of American Foresters 2013 National Convention, Charleston, South Carolina.
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October 2013
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Supported by empirical evidence, our theoretical model implies that maintaining a competitive equilibrium not only maintains crucial wildlife habitats and ecosystem productivity and resilience, but could also improve resource utilization and ecosystem productivity.
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Li, Z., J. Xia, A. Ahlstrom, A. Rinke, C. Koven, D.J. Hayes, D. Ji, G. Zhang, G. Krinner, G. Chen, J. Dong, J. Liang, J.C. Moore, L. Jiang, L. Yan, P. Ciais, S. Peng, Y.-P. Wang, X. Xiao, Z. Shi, A.D. McGuire, and Y. Luo. 2017. Recent slowdown of atmospheric CO2 amplification due to vegetation-climate feedback over northern lands. Fall 2017 Meeting of the American Geophysical Union. Poster Presentation.
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December 2017
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Here, based on in-situ atmospheric CO2 concentration records above 50o N, we found a slowdown of the atmospheric CO2 amplitude increase from mid-1990s to mid-2000s. This phenomenon is associated with the paused vegetation greenness and slowdown of spring warming.
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Lewis, B, and M.S. Wipfli. 2012. A review of lake fertilization as a fisheries enhancement tool in Alaska. American Fisheries Society Alaska Chapter meeting, Kodiak, AK, 24-26 Oct.
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October 2013
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Leppi, JC, DJ Rinella, MS Wipfli, MS Whitman. 2019. Diverse foraging niches and habitat use by Broad Whitefish (Coregonus nasus) in Arctic Alaska. American Fisheries Society, Alaska Chapter.
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September 2019
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Work highlights some key life history behaviors and foraging strategies of a poorly understood but highly valued subsistence fish species in Arctic Alaska-- Broad Whitefish. Information gleaned from this work helps us better understand the basic ecology of this fish, helping guide management decisions in the face of expanding petroleum development and continued climate change in Arctic Alaska.
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Leppi, JC, DJ Rinella, MS Wipfli, MS Whitman. 2019. Diverse foraging niches and habitat use by Broad Whitefish (Coregonus nasus) in Arctic Alaska. American Fisheries Society, Alaska Chapter.
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March 2019
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Work highlights some key life history behaviors and foraging strategies of a poorly understood but highly valued subsistence fish species in Arctic Alaska-- Broad Whitefish. Information gleaned from this work helps us better understand the basic ecology of this fish, helping guide management decisions in the face of expanding petroleum development and continued climate change in Arctic Alaska.
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Leppi, J, M Wipfli, A Liljedahl, D Rinella, M Whitman. Potential Implications of Climate Change for Broad Whitefish (Coregonus nasus) in Arctic Alaska. Western Division of the American Fisheries Society, Anchorage, Alaska, May 2018.
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May 2018
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Project shows how climate change is expected to affect Broad Whitefish and their habitats in Arctic Alaska. Changes in spawning habitats and migration patterns are expected.
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Latty,C. J., T. E. Hollmen, M. R. Petersen, A. N. Powell, and R. D. Andrews 2008. Biochemical and clinical responses of common eiders to implanted satellite transmitters. 11 November, 3rd North American Sea Duck Conference, Quebec City, Canada.
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November 2008
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Latty, C.J., T.E. Hollmen, M.R. Petersen, A.N. Powell, and R.D. Andrews. 2008. Abdominally implanted transmitters affect the dive performance of common eiders. 13th Alaska Bird Conference.
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March 2008
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Latty, C.J., T. E. Hollmen, M.R. Petersen, A.N. Powell, and R.D. Andrews. 2008. Abdominally implanted transmitters with percutaneous antenna affect dive performance of common eiders. Pacific Seabird Group.
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February 2008
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Latty, C. J., T.E. Hollmen, M. R. Petersen, A. N. Powell, and R. D. Andrews. 2008. Dive performance of common eiders implanted with satellite transmitters. 12 November, 3rd North American Sea Duck Conference, Quebec City, Canada.
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November 2008
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Latty, C. J., T. E. Hollmen, M. R. Petersen, A. N. Powell, and R. D. Andrews. 2006. Effects of implanted satellite transmitters on captive common eiders. 16 February, Poster, Pacific Seabird Group, Girdwood, AK.
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February 2006
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Latty, C. J., T. E. Hollmen, M. R. Petersen, A. N. Powell, and R. D. Andrews. 2006. Effects of implanted satellite transmitters on captive common eiders foraging at a depth of 4.5 m. 27 September, 13 th Annual Conference of The Wildlife Society, Anchorage, AK. Poster.
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September 2006
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Laske, SM, AE Rosenberger, MS Wipfli, CE Zimmerman. 2016. Hydrology and fish composition drives lentic food web structure in Arctic Alaska. Society for Freshwater Science, Sacramento, CA, May 21-26.
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May 2016
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This study examined how differences in surface water hydrology affect fish distribution and food web structure in 32 lentic water bodies at two locations over a range of local and regional surface water connectivity. Reduced fish species richness in isolated locations limited the number of trophic levels, seemingly due to exclusion of top fish predators. Preliminary analyses suggest that fish species assemblage and fish dietary habits influenced invertebrate assemblages. Fish distributional pat
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Laske, S.M., M.S. Wipfli, A.E. Rosenberger, and C.E. Zimmerman. 2012. Fish and invertebrate assemblages in ponds and lakes on the Arctic Coastal Plain, Alaska. American Fisheries Society Alaska Chapter meeting, Kodiak, AK, 24-26 Oct.
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October 2013
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Laske, S., A.E. Rosenberger, J.C. Koch, C.E. Zimmerman, and M.S. Wipfli. 2014. Feeding frenzy: Exploring the role of ninespine stickleback in Arctic freshwater food webs. Annual Meeting of the Society for Freshwater Science. Portland, OR. May, 2014.
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May 2014
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Presentation on potential role of fish presence on Arctic lake food webs.
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Laske, S., A. Rosenberger, M.S. Wipfli, and C. Zimmerman. 2017. Surface water connectivity among Arctic lakes drives patterns of fish species richness and composition, and food web structure. American Water Resources Association Spring Specialty Conference 2017, April 30 – May 3, 2017, Snowbird, UT.
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April 2017
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Water connectivity among Arctic lakes drives patterns of fish species richness and composition and food web structure.
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Laske, S. M., J. C. Koch, C. E. Zimmerman, M. S. Wipfli, and A. E. Rosenberger. Fish distribution in a warming Arctic: what current patterns may tell us about the future. Alaska Chapter of the American Fisheries Society Annual Meeting, Fairbanks, Oct. 2013.
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October 2013
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This work documents how, in a regional context, surface water connectivity contributes to fish species presence in North Slope lakes. This complements ongoing work in a landscape context.
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Laske, S, T Haynes, A Rosenberger, J Koch, M Wipfli, M Whitman, C Zimmerman. 2015. Influence of surface water connectivity on fish species richness and assemblages on the Arctic Coastal Plain, Alaska. American Fisheries Society national meeting. Portland, OR.
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August 2015
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We examined how fish species richness and assemblages in Arctic lakes varied with surface water connectivity. We found strong relationships between lake and surface water connectivity characteristics and richness and assemblage patterns, where the same characteristics had greater influence in isolated lakes than in connected lakes.
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Laske, S, A Rosenberger, W Kane, M Wipfli, C Zimmerman. 2015. Top-down effects of Ninespine Stickleback on invertebrate communities of small Arctic ponds: an experimental approach. AK AFS
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November 2015
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Shows how stickleback can influence invertebrate communities on the Arctic Coastal Plain. Drying from climate change will affect access of these and other fishes in freshwater habitats.
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Laske, S, A Rosenberger, M Wipfli, C Zimmerman. 2017. Generalist feeding strategies of Arctic fishes stabilize lentic food webs. AK Chapter AFS-AWRA, Fairbanks, AK
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March 2017
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Study looked at how fish feeding strategies influence Arctic food webs. We found that feeding breadth was similar among fishes and that strategy appears to aid their survivorship and stabilize food webs.
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Laske, S, A Rosenberger, M Wipfli, C Zimmerman. 2014. Feeding frenzy: Exploring the role of ninespine stickleback in Arctic freshwater food webs. Joint Aquatic Sciences Meeting. Portland, OR.
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May 2014
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Study reports on the role stickleback play in Arctic pond food webs.
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Lara, M.J., P. Martin, and A.D. McGuire. 2016. Mapping polygonal tundra geomorphology across the Arctic Coastal Plain of Alaska. Eleventh International Conference on Permafrost. Potsdam, Germany. Poster Presentation.
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June 2016
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We use an object based image analysis, using LandSat 8–OLI satellite imagery and an array of ground based photography and field data to create the first polygonal tundra geomorphology map for the ACP of Alaska, at a spatial resolution of 30 x 30 meters. This fine-scale polygonal tundra geomorphology map, characterizes arctic patterned ground across large scales, which may enable higher resolution characterization of important processes and parameters that control ecosystem structure and functio
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Lara, M.J., H. Genet, A.D. McGuire, E.S. Euskirchen, Y. Zhang, D.R.N. Brown, M.T. Jorgenson, V. Romanovsky, A. Breen, and W.R. Bolton. 2016. Thermokarst rates intensify due to climate change and forest fragmentation in an Alaskan boreal forest lowland. Eleventh International Conference on Permafrost. Potsdam, Germany. Oral Presentation.
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June 2016
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This study evaluates the trajectories and potential drivers of 60 years of forest change in a landscape subjected to permafrost thaw in unburned dominant forest types (paper birch and black spruce) associated with location on elevated permafrost plateau and across multiple time periods (1949, 1978, 1986, 1998 and 2009; Fig.1) using historical and contemporary aerial and satellite images for change detection. This work highlights that the vulnerability and resilience of lowland ice-rich permafro
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Lara, M.J., H. Genet, A.D. McGuire, E.S. Euskirchen, Y. Zhang, D. Brown1, T. Jorgenson, V.E. Romanovksy, A.L. Breen, and W.R. Bolton. 2015. Thermokarst rates intensify due to climate change and forest fragmentation in an Alaskan Boreal Forest Lowland. Fall Meeting of the American Geophysical Union. Poster Presentation.
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December 2015
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This study evaluates the trajectories and potential drivers of 60 years of forest change in a landscape subjected to permafrost thaw in unburned dominant forest types (paper birch and black spruce) associated with location on elevated permafrost plateau and across multiple time periods (1949, 1978, 1986, 1998 and 2009) using historical and contemporary aerial and satellite images for change detection.
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Lara, M.J., A.D. McGuire, E.S. Euskirchen, V.L. Sloan, C.M. Iversen, R.J. Norby, H. Genet, Y. Zhang, and F. Yuan. 2013. Modeled change in carbon balance between 1970-2100 of a polygonal arctic tundra ecosystem near Barrow, Alaska. Meeting of the American Geophysical Union, San Francisco, California.
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December 2013
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In northern Alaska, nearly 65% of the terrestrial surface is composed of polygonal tundra, where microtopographic position (i.e. high center, low center, trough) varies surface hydrology, plant community composition, and biogeochemical cycling, over small (<5m) spatial scales.The polygonal tundra land cover classification found high center & rims to represent 37.5% of the study area, low centers 19.7%, troughs 9.9%, water bodies (i.e. lakes, ponds, rivers) 17.8%, and non-polygonal tundra (i.e.
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Lara, M., A.D. McGuire, and E.S. Euskirchen. 2014. Centur time-scale implications for change in peak growing season carbon flux in ice wedge polygonal tundra on the Barrow, Peninsula. US – International Association of Landscape Ecologists Annual Symposium. Anchorage, Alaska. Invited.
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May 2014
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Results indicate that 100 years of landscape change in response to the Thaw Lake Cycle, will only slightly decrease peak season carbon uptake (-1.8 tonsC dayˉ¹), while a moderate increase (i.e. 30%) in thermokarst disturbance associated with transitions from LC to HC polygons increases the carbon sink capacity (+255.5 tonsC day ˉ¹) during the peak season.
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Kwit, I.A., J.D. Muehlbauer and J. Hagelin. 2024. An exploration of phenological mismatch between aquatic prey and a terrestrial consumer. Alaska Chapter American Fisheries Society Annual Meeting, Seward, Alaska, 25-29 March 2024.
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March 2024
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Aquatic insects play a key role in stream and terrestrial food webs. As emergence of these insects as winged adults advances earlier into the calendar year as a result of warming, there is concern about changes to the availability of these prey resources. This study will assess the ambient insect community surrounding insectivorous bird nests in various regions of Alaska to glean information about the availability of insect prey.
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Koven, C.D., E.A.G. Schuur, C. Schadel, T.J. Bohn, E.J. Burke, G. Chen, X. Chen, P. Ciais, G. Grosse, J.W. Harden, D.J. Hayes, G. Hugelius, E.E. Jafarov, G. Krinner, P. Kuhry, D.M. Lawrence, A.H. MacDougall, S.S. Marchenko, A.D. McGuire, S.M. Natali, D.J. Nicolsky, D. Olefeldt, S. Peng, V.E. Romanovsky, K.M. Schaefer, J. Strauss, C.C. Treat, and M. Turetsky. 2015. A simplified, data-constrained approach to estimate the permafrost carbon-climate feedback: The PCN Incubation-Panarctic Thermal (Pinc-PanTher) Scaling Approach. Fall Meeting of the American Geophysical Union. Oral Presentation.
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December 2015
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We present an approach to estimate the feedback from large-scale thawing of permafrost soils using a simplified, data-constrained model that combines three elements: soil carbon (C) maps and profiles to identify the distribution and type of C in permafrost soils; incubation experiments to quantify the rates of C lost after thaw; and models of soil thermal dynamics in response to climate warming.
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Koven, C.D., D.M. Lawrence, A.D. McGuire, A.G. Slater, G. Hugelius, and N. Parazoo. 2016. Permafrost in earth system models: Recent progress and future challenges. Fall 2016 Meeting of the American Geophysical Union. Oral Presentation. Invited.
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December 2016
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Permafrost is a crucial component of the Earth system, representing a key intersection point of soil physical and carbon cycle dynamics, yet has been poorly represented in Earth system models. None of the ESMs of the CMIP5 generation included permafrost carbon dynamics, and many had poor representation of soil thermal dynamics. Subsequent to CMIP5, a number of key improvements have been made to address these shortcomings, including strategies for including permafrost carbon dynamics in models,
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Kohler, A.E., T. Copeland, D.A. Vendetti, M. Wipfli, B. Lewis, L. Denny, and J. Gable. September 2011. Nutrient flux by chinook salmon in Idaho streams: The ins and outs, and implications for management. Annual meeting, American Fisheries Society, Seattle, WA.
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September 2011
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Koch, J, J Schmutz, K Gurney, S Laske, M Wipfli, T Fondell. 2014. The effect of ephemeral ponds, streams, and large lakes on nutrient fluxes, ecosystems and wildlife of the Arctic Coastal Plain of Alaska. Joint Aquatic Sciences Meeting. Portland, OR.
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May 2014
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Work showed how water body type affects water and nutrient flux on the Arctic Coastal Plain of Alaska
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Knoche, M., L. Phillips, A. Powell, and L. Quakenbush. 2006. Isotopes, feathers, and transmitters, or what can be learned about waterbirds during nonbreeding by combining marking methods. Pacific Seabird Group, 17 February, Girdwood, AK.
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February 2006
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Knoche, M., A.N. Powell, P. Barboza, M. Wooller, and L. Quakenbush. 2005. New insights into the molt migration of female King Eiders from stable carbon and nitrogen isotope analyses. Annual Meeting, Pacific Seabird Group/Waterbird Society Meeting, 19-23 January, Portland, OR.
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January 2005
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Knoche, M., A.N. Powell, P. Barboza, M. Wooller, and L. Quakenbush. 2004. King Eider wing molt: inferences from stable isotope analyses. Annual Meeting, American Ornithologists Union, Quebec City, QC, Canada. 16-21 August 2004.
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August 2004
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Klobucar, S.L., Falke, J.A., Rupp, T.S., Bieniek, P.A., Genet, H., and M.A. Lindgren. 2019. Integrating at the interface(s): modeling the effects of fire and climate change to support management and conservation of fish habitat and populations in Alaskan boreal forests. Alaska Chapter of the American Fisheries Society Annual Meeting, Sitka, Alaska, 19 – 21 March, 2019.
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March 2019
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In light of current and expected climate change driven shifts of fire regimes across the boreal interior of Alaska (e.g., increased frequency and severity), understanding the future impacts of fire to these important processes is critical for managing aquatic habitats and fish populations, as well as fire itself. . In sum, this study will improve our ability to manage future fire and climate driven effects at the terrestrial-aquatic interface, serve as a template for management in other ecoregi
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Klobucar, S.L., Falke, J.A., Rupp, T.S., Bieniek, P.A., Genet, H., and M.A. Lindgren. 2019. Fo’real changes in boreal streams: a multifaceted modeling approach to predict the effects of forest fire on aquatic habitat vulnerability in interior Alaska. 149th American Fisheries Society Annual Meeting, Reno, Nevada, 29 September – 3 October, 2019.
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September 2019
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In light of current and expected climate driven shifts of fire regimes (e.g., increased frequency, severity) across interior Alaska, understanding future impacts of fire to stream regulating biological, chemical, and physical processes are critical for managing fire, aquatic habitats, and fish populations. Our results will provide valuable insight for fire management decisions with respect to one of Alaska’s most valuable commercial, sport, and subsistence fish species.
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Klobucar, S.L., Falke, J.A., Rupp, T.S., & Bieniek, P.A. 2021. Quantifying the spark before the fire: a modeling approach to predict future effects of forest fire on aquatic habitat availability and juvenile Chinook Salmon growth in interior Alaska. Western Division American Fisheries Society Annual Meeting [Virtual]. 11-13 May, 2021.
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May 2021
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Across a warmer and drier interior Alaska concomitant shifts in fire regimes (e.g., increased frequency, severity) are likely to alter stream-regulating biological, chemical, and physical processes, and understanding and predicting these effects will be important for the management and conservation of aquatic habitats and fish populations in the future. This predicted habitat expansion would be important to consider for fire management decisions (e.g., suppression) with respect to one of Alaska
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Klobucar, S.L., Falke, J.A., Rupp, T.S., & Bieniek, P.A. 2021. Quantifying the spark before the fire: a modeling approach to predict future effects of forest fire on aquatic habitat availability and juvenile Chinook Salmon growth in interior Alaska. American Fisheries Society, Alaska Chapter, Annual Meeting. Held virtually, 22 – 25 March, 2021.
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March 2021
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Across a warmer and drier interior Alaska concomitant shifts in fire regimes (e.g., increased frequency, severity) are likely to alter stream-regulating biological, chemical, and physical processes, and understanding and predicting these effects will be important for the management and conservation of aquatic habitats and fish populations in the future. This predicted habitat expansion would be important to consider for fire management decisions (e.g., suppression) with respect to one of Alaska
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Klobucar, S.L., Falke, J.A., Rupp, T.S., & Bieniek, P.A. 2020. Quantifying the spark before the fire: a modeling approach to predict future effects of forest fire on aquatic habitat availability and juvenile Chinook Salmon growth in interior Alaska. American Fisheries Society, Alaska Chapter, Annual Meeting. Fairbanks, Alaska, 23 – 26 March, 2020.
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March 2020
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Across a warmer and drier interior Alaska concomitant shifts in fire regimes (e.g., increased frequency, severity) are likely to alter stream-regulating biological, chemical, and physical processes, and understanding and predicting these effects will be important for the management and conservation of aquatic habitats and fish populations in the future. Our results suggest potential stream reaches where expansion of Chinook Salmon into thermally suitable spawning and rearing habitats could warr
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Klobucar, S.L., Falke, J.A., Rupp, T.S., & Bieniek, P.A 2020. Playing with fire? Predicting wildland fire effects on thermal habitat and juvenile Chinook Salmon growth in interior Alaska riverscapes. Association for the Sciences of Limnology and Oceanography-Society of Freshwater Science Joint Meeting. Madison, WI, 7 – 12 June, 2020.
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June 2020
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With current and expected climate-driven shifts in Alaska fire regimes (e.g., increased frequency, severity), understanding future fire impacts on stream regulating processes are critical for managing fire, aquatic habitats, and fish populations .Our results indicate potential range expansion of salmon to stream reaches that become thermally suitable for spawning and rearing, an important consideration for fire management decisions regarding one of Alaska's most valuable commercial, sport, and
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Klobucar, S., Falke, J., Rupp, S., Bieniek, P., Genet, H., Lindgren, M., Hinkle, E., and D. Klobucar. Aquatic ecosystem vulnerability to fire and climate change in Alaskan boreal forests. Strategic Environmental Research and Development Program Annual Symposium. 3-5 December, 2019. Washington, D.C.
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December 2019
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In light of current and expected climate change driven shifts of fire regimes across the boreal interior of Alaska (e.g., increased frequency and severity), understanding the future impacts of fire to these important processes is critical for managing aquatic habitats and fish populations, as well as fire itself. Our results will improve our ability to manage future fire and climate driven effects at the terrestrial-aquatic interface, serve as a template for management in other ecoregions, and
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Klobucar, D.D., and J.A. Falke. 2019. Gaging the importance: hydrologic regime characterization for wildfire- impacted streams in changing boreal ecosystems. American Fisheries Society Annual Meeting, Reno, Nevada, 29 September – 3 October, 2019.
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September 2019
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Understanding how wildfire influences hydrologic patterns (e.g., timing, magnitude) in boreal streams is important for effective aquatic habitat and species management under a rapidly changing climate. Our hydrologic regime characterization will provide a benchmark with which to detect potential regime shifts that may result from continued climate warming and increased fire disturbance across the Northwest Boreal Ecosystem, and provide valuable information toward management and conservation of
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Klobucar, D.D., and J.A. Falke. 2019. Gaging the importance: characterizing hydrologic regimes of headwater streams in changing boreal ecosystems. Alaska Chapter of the American Fisheries Society Annual Meeting, Sitka, Alaska, 19 – 21 March, 2019.
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March 2019
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Boreal stream ecosystems, which span much of Alaska and western Canada, are changing rapidly, and shifts will likely be reflected in stream flow dynamics (e.g., timing, magnitude, duration).We will assess the degree to which headwater boreal streams reflect mainstem hydrologic regimes by characterizing historic hydrologic regimes and provide a benchmark from which to detect potential hydrologic regime shifts in response to past and future disturbance (e.g., fire) and/or climate change.
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Klapstein, S.J., M.R. Turetsky, A.D. McGuire, J.W. Harden, and J.M. Waddington. December 2011. Controls on ebullition and methane emissions in Alaskan peatlands experiencing permafrost thaw. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2011
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Kimbirauskas, R. K., R. W. Merritt, M. S. Wipfli, and P. E. Hennon. 2004. Macroinvertebrate community response to riparian red alder in forested headwaters of southeastern Alaska. North American Benthological Society annual meeting, Vancouver, Canada.
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June 2004
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Kilinc, M., J. Beringer, L. Hutley, N. Tapper, A.D. McGuire, K. Kurioka, S. Wood, and N. D'Argent. December 2008. Biophysical controls of carbon exchange in old growth Mountain Ash stands. Fall Meeting of the American Geophysical Union, San Francisco, California.
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December 2008
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Kicklighter, D.W., D.J. Hayes, J.W. McClelland, B.J. Peterson, A.D. McGuire, and J.M. Melillo. December 2010. Relative importance of multiple factors on terrestrial loading of DOC to Arctic river networks. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2010
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Kicklighter, D., M. Webster, M. Sarofim, A. McGuire, J. Melillo, J. Reilly, R. Prinn, and H. Tian. July 2001. Potential responses of terrestrial carbon storage to increasing atmospheric CO2 concentration and variable climate: Sensitivity to changes in vegetation nitrogen concentration. International Geosphere-Biosphere Programme Global Change Open Science Conference, Amsterdam.
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July 2001
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Kicklighter, D. W., M. D. Webster, A. D. McGuire, H. Tian, J. M. Reilly, J. M. Melillo, and R. G. Prinn. December 2000. Potential responses of terrestrial net primary production and carbon storage to increasing atmospheric carbon dioxide concentration and variable climate: Sensitivity to changes in vegetation nitrogen concentration. American Geophysical Union Fall Meeting, San Francisco.
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December 2000
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Kicklighter, D. W., J. M. Melillo, R. G. Prinn, A. D. McGuire, B. S. Felzer, and Q. Zhuang. May 2006. Relative importance of multiple stresses on terrestrial carbon sequestration. Spring Meeting, American Geophysical Union, Baltimore, MD.
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May 2006
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Kicklighter, D. W., J. M. Melillo, R. G. Prinn, A. D. McGuire, B. S. Felzer, and Q. Zhuang. August 2006. Importance of DOC exports on estimates of terrestrial carbon sequestration. Ninety-first Annual Meeting, Ecological Society of America, Memphis, TN.
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August 2006
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Kicklighter, D. W., J. M. Melillo, R. G. Prinn, A. D. McGuire, B. S. Felzer, and Q. Zhuang. August 2005. Relative importance of multiple stresses on terrestrial carbon sequestration. Annual Meeting of the Ecological Society of America, Montreal, Canada.
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August 2005
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Kennedy, T.A., J.D. Muehlbauer, B.R. Deemer, C.B. Yackulic, M.A. Ford, C. Szydlo and A.N. Metcalfe. 2022. Experimental ‘Bug Flows’ increased algae production and insect diversity in the Colorado River, Grand Canyon. 16th Biennial Conference of Science & Management on the Colorado Plateau & Southwest Region, Flagstaff, Arizona, 12-15 September 2022.
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September 2022
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Presentation on results of Bug Flows Experiment conducted at Glen Canyon Dam on Colorado River, Arizona.
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Kennedy, T.A., A. Metcalfe, B.R. Deemer, M. Ford, C. Szydlo, C. Yackulic and J. Muehlbauer. 2022. Update on the Bug Flow Experiment: background, monitoring, and new analyses. Glen Canyon Dam Adaptive Management Program Adaptive Management Working Group Meeting, Flagstaff, AZ, 17-18 August 2022.
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August 2022
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This presentation provides an update to Grand Canyon Colorado River stakeholders on the current state of knowledge about the Bug Flows Experiment. This experiment is ongoing, currently in its fourth year.
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Kennedy, T.A. and J.D. Muehlbauer. 2022. Project F: Aquatic ecology and food base monitoring. Glen Canyon Dam Adaptive Management Program Annual Reporting Meeting, Virtual, 11-12 January 2022.
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January 2022
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This was a presentation at an annual stakeholder meeting. It describes the yearly activities of the USGS Grand Canyon Monitoring and Research Center aquatic ecology research group.
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Kellyhouse, R. A., B. Griffith, D. C. Douglas, J. Dau, and G. Carroll. June 2001. Calving ground habitat selection: Teshekpuk Lake and Western Arctic Caribou Herds. Annual Meeting, American Society of Mammalogists, Missoula, MT.
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June 2001
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Kelly, R., H. Genet, A.D. McGuire, and F.S. Hu. 2013. Model simulations driven by paleo-forcing data reveal large and rapid responses of carbon storage to boreal fire-regime shifts. Annual Meeting of the Ecological Society of America, Minneapolis, Minnesota.
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August 2013
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This finding builds confidence in predictions made in the absence of information on the legacy of past burning. However, this result reflects that vegetation feedback dampened past fire-frequency variability in our study region. In ecosystems where such feedback is less prominent, pre-historic fire regimes likely have a greater impact on ecosystem carbon storage.
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Kelly, R., H. Genet, A.D. McGuire, and F. Hu. 2013. Paleodata-model integration reveals uncertain boreal forest carbon balance due to rapid recent fire regime change. Meeting of the American Geophysical Union, San Francisco, California.
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December 2013
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We collected 14 lake-sediment cores from the Yukon Flats, Alaska to elucidate patterns of long-term environmental change. We then converted fire-regime reconstructions from these data to input drivers for the Dynamic Organic Soils version of the Terrestrial Ecosystem Model (DOS-TEM). Combined with simulated paleoclimate from an Earth System
Model and CO2 data from ice core analysis, these "paleo-forcing" data allowed us to model past changes in
ecosystem C storage in our study area to (1) asses
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Keller, D.E., J.D. Muehlbauer, C. McGee and C. Buffington. 2024. Are we measuring the right things to inform stream restoration in Interior Alaska? Midnight Sun Science Symposium, Fairbanks, Alaska, 11-12 April 2024.
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April 2024
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This project will be an assessment of the stream restoration on Cripple Creek, located near the city of Fairbanks, in Interior Alaska. Data will be compared to reference site conditions similar to Cripple Creek’s natural channel to determine in what ways the restoration is showing measurable improvement. This project will provide feedback on the novel Stream Quantification Tool to federal agencies, such as U.S. Fish & Wildlife Service, Bureau of Land Management, and the National Park Service.
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Keller, D.E., J.D. Muehlbauer, C. McGee and C. Buffington. 2024. Are we measuring the right things to inform stream restoration in Interior Alaska? Alaska Chapter American Fisheries Society Annual Meeting, Seward, Alaska, 25-29 March 2024.
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March 2024
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This project will be an assessment of the stream restoration on Cripple Creek, located near the city of Fairbanks, in Interior Alaska. Data will be compared to reference site conditions similar to Cripple Creek’s natural channel to determine in what ways the restoration is showing measurable improvement. This project will provide feedback on the novel Stream Quantification Tool to federal agencies, such as U.S. Fish & Wildlife Service, Bureau of Land Management, and the National Park Service.
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Kasischke, E.S., S.J. Goetz, A.D. McGuire, and D.J. Hayes. December 2008. An overview of the role of disturbance in the terrestrial carbon budget. Fall Meeting of the American Geophysical Union, San Francisco, California. Invited.
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December 2008
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Kasischke, E.S., H.D. Alexander, K. Barrett, H. Genet, S.J. Goetz, J.W. Harden, E. Hoy, J.F. Johnstone, T. Jorgenson, E.S. Kane, M. Kavenskiy, M.C. Mack, A.D. McGuire, S.R. Mitchell, J.A. O’Donnell, and M. Turetsky. 2013. Challenges for understanding the combined impacts of climate change and the 2001-2010 fires on carbon cycling in Alaskan boreal forests. Meeting of the American Geophysical Union, San Francisco, California. Invited.
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December 2013
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Here, we will review recent research directed towards understanding how fire and climate interact to control carbon cycling in Alaska's boreal forest. Topics covered in this presentation will include: (a) recent changes to Alaska's fire regime; (b) factors controlling the burning of surface organic layers in Alaskan boreal forests; (c) factors controlling changes in permafrost following fire; (d) how variations in fire severity and changes in permafrost control patterns of tree seedling recruit
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Kasischke, E.S., E.S. Kane, J.A. O’Donnell, N.L. Christensen, S.R. Mitchell, M.R. Turetsky, D.J. Hayes, E. Hoy, K.M. Barrett, A.D. McGuire, and F. Yuan. December 2011. Feedbacks between climate, fire severity, and differential permafrost degradation in Alaskan black spruce forests – implications for carbon cycling. Fall Meeting of the American Geophysical Union, San Francisco, CA. Invited.
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December 2011
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Kasischke, E., M. R. Turetsky, E. S. Kane, C. Treat, J. W. Harden, K. Manies, R. D. Ottmar, A. D. McGuire, and S. Yi. December 2007. Landscape and climate controls on fire severity in Alaskan black spruce forests. Fall Meeting of the American Geophysical Union, San Francisco, CA. Invited.
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December 2007
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Kasischke, E. S., M. R. Turetsky, A. D. McGuire, and N. H. French. December 2004. Variations in the fire regime in the North American boreal forest between 1990 and 2004 and their potential impacts on terrestrial carbon storage. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2004
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Kasischke, E. S., M. R. Turetsky, A. D. McGuire, J. Harden, K. Manies, R. Ottmar, E. S. Kane, and N. H. F. French. May 2007. Recent changes in climate and the fire regime increase depth of burning of the surface organic layer in Alaskan black spruce forests. Sixth International Conference on Disturbance Dynamics in Boreal Forests, Fairbanks, AK.
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May 2007
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Kasischke, E. S., J. Allen, N. H. F. French, E. Hoy, R. Jandt, A. D. McGuire, K. A. Murphy, T. S. Rupp, M. R. Turetsky, and D. L. Verbyla. November 2006. Satellite assessment of fire severity in Alaska?s boreal forest. Third International Fire Congress, San Diego, CA.
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November 2006
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Kane, E., M. Turetsky, M. Waddington, J. Harden, and A.D. McGuire. May 2009. Seasonal ice and drainage controls over solute chemistry in a rich boreal fen: A field water table manipulation study in Interior Alaska. Spring Meeting of the American Geophysical Union, Toronto, Canada.
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May 2009
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Julius, S, J. West, B. Griffith, and J.M. Scott. August 2009. Adaptation for climate sensitive ecosystems: Synthesis and overview. Special Session 17 (Natural Resources and Climate Change:Effects and Adaptation) of 94th Ecological Society of America Annual Meeting, Albuquerque, NM.
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August 2009
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Joyce, L., A. McGuire, D. Coulson, J. Clein, T. Burnside, and J. Gentry. December 2004. Historical Land use modeling of agriculture and forestry. Fall Meeting of the American Geophysical Union, San Francisco, California.
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December 2004
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Joyce, L. A., D. P. Coulson, A. D. McGuire, R. Birdsey, and B. Smith. August 2002. Harvesting disturbances on forestland from 1600 to present. Annual Meeting, Ecological Society of America, Tucson, AZ.
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August 2002
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Joyce, L. A., D. Coulson, A. D. McGuire, and B. Smith. December 2001. U.S. timber harvest from 1750 to 1997. Fall Meeting, American Geophysical Union, San Francisco, CA.
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December 2001
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Joyce, L. A., A. D. McGuire, D. P. Coulson, J. Clein, and T. Burnside. September 2005. Historical changes in carbon storage of the eastern United States: Uncertainties associated with forest harvest and agricultural land use activities. Seventh International Carbon Dioxide Conference. Boulder, Colorado.
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September 2005
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Joy, P., M.S. Wipfli, C. Stricker, and W. Jones. 2012. Marine-nutrient assimilation in rearing coho and Chinook salmon in the Unalakleet River. American Fisheries Society Alaska Chapter meeting, Kodiak, AK, 24-26 Oct.
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October 2013
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Joy, P, W Jones, C Stricker, M Wipfli. 2015. Seasonal and landscape patterns of marine-nutrient assimilation in rearing juvenile Coho and Chinook salmon in western Alaska. AK AFS
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November 2015
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Work shows that marine nutrients from pink and chum salmon benefit other salmon species (coho and chinook), and that multispecies management of salmon may be a better approach than the traditional single species method.
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Johnston, C.E., S.A. Ewing, R.K. Varner, J.W. Harden, M.R. Turetsky, and A.D. McGuire. 2012. Methane emission through diffusion and ebullition in thaw wetlands in interior Alaska. Meeting of the American Geophysical Union, San Francisco, California.
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December 2012
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We argue that methane ebullition contributes most significantly to C loss in early stages of thaw and is related to saturation and warming of soils following permafrost thaw in northern peatlands.
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Johnson, K.D., J.W. Harden, A.D. McGuire, J. Bockheim, M. Clark, J. O’Donnell, C. Ping, and E.A. Schuur. December 2010. Soil carbon storage in Alaska: Results from a new database and a multi-regional landscape approach to spatial distribution assessment. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2010
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Johnson, K.D., J.W. Harden, A.D. McGuire, F. Yuan, and M. Clark. 2012. Permafrost degradation and organic layer thickening over a climate gradient in a discontinuous permafrost region. Meeting of the American Geophysical Union, San Francisco, California.
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December 2012
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Our results indicate obvious consequences for the carbon cycle in this region under warming conditions where increased carbon storage in the organic layer may offset an unknown carbon loss in the mineral soil as permafrost thaws.
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Johnson, K., D. Agarwal, J. Harden, A.D. McGuire, C. Swanston, and C. van Ingen. December 2009. The Alaska Soil Carbon Database: A powerful database for soil carbon synthesis and modeling. Fall Meeting of the American Geophysical Union, San Francisco, California.
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December 2009
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Jianyang Xia1*, A. David McGuire2, David Lawrence3, Eleanor Burke4, Xiaodong Chen5, Christine Delire6, Charles Koven7, Andrew MacDougall8, Shushi Peng9,10, Annette Rinke11, Kazuyuki Saito12, Wenxin Zhang13, Ramdane Alkama6, Theodore J. Bohn5, Philippe Ciais9, Bertrand Decharme6, Isabelle Gouttevin10,14, Tomohiro Hajima12, Duoying Ji11, Gerhard Krinner10, Dennis P. Lettenmaier5, Paul A. Miller13, John C. Moore11, Benjamin Smith13, Tetsuo Sueyoshi12, Zheng Shi1, Liming Yan15, Yiqi Luo1. Terrestrial ecosystem model performance for net primary productivity and its vulnerability to climate change in permafrost regions. AGU 2014 Fall Meeting.
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December 2014
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Here, we evaluated 10 terrestrial ecosystem models for their estimated net primary productivity (NPP) and its vulnerability to climate change in permafrost regions in the Northern Hemisphere. The results of this study indicate that the model predictability of C cycle in permafrost regions can be improved by better representation of those processes controlling the seasonal maximum GPP and the CUE as well as their sensitivity to climate change.
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Jason R. Neuswanger, Nicholas F. Hughes, Mark S. Wipfli, and Amanda E. Rosenberger. The importance of drifting debris for drift-feeding juvenile Chinook salmon. Alaska Chapter American Fisheries Society meeting. Nov 2011.
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November 2011
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Jalbert, C., Falke, J., Westley, P., López, J.A., Dunker K., and A. Sepulveda. 2018. Assessing vulnerability of salmonids to invasion of Northern Pike in Southcentral Alaska. Western Division American Fisheries Society Annual Meeting, Anchorage, Alaska, 21-25 May, 2018
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May 2018
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Northern Pike (Esox lucius) were illegally introduced to the Matanuska-Susitna (MatSu) basin in Southcentral Alaska in the 1950’s and their populations continue to expand. Results of this work will increase our understanding of the ongoing Northern Pike invasion in the MatSu basin and provide managers with the tools necessary to rank and identify vulnerable locations throughout Southcentral Alaska.
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Jalbert, C., Falke, J., Westley, P., López, J.A., Dunker K., and A. Sepulveda. 2018. Assessing vulnerability of salmonids to invasion of Northern Pike in Southcentral Alaska. American Fisheries Society Annual Meeting, Atlantic City, New Jersey, 19-23 August, 2018
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August 2018
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Management of ongoing invasions requires knowledge of the location and quality of available habitat across broad geographic ranges. Results of this work will increase our understanding of the ongoing Northern Pike invasion in the MatSu basin and provide managers with tools necessary to rank and identify vulnerable locations throughout Southcentral Alaska.
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Jalbert, C., Falke, J., Westley, P., López, J A., K. Dunker and A. Sepulveda. 2017. Landscape genetic diversity of native and invasive Northern pike in Alaska. MatSu Science Symposium, Palmer, Alaska, 8-9 November, 2017
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November 2017
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Northern Pike (Esox lucius) were illegally introduced to the Matanuska-Susitna River (MatSu) basin in Southcentral Alaska in the 1950’s and their populations continue to expand. We will characterize genetic diversity from native and invasive ranges create Northern Pike habitat suitability models to better evaluate the vulnerability of juvenile salmonids within the MatSu basin.
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Jalbert, C., Falke, J., Westley, P., López, A., Dunker, K., and A. Sepulveda. 2017. Landscape genetic diversity of native and invasive Northern pike in Alaska. Alaska Chapter American Fisheries Society Annual Meeting, Fairbanks, Alaska, 19-23 March, 2017
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March 2017
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This project will be the first to investigate the genetic and environmental landscape among introduced populations of Northern Pike (Esox lucius) in southcentral Alaska. This study is expected to increase our understanding of Northern Pike genetics across their native and invasive ranges, as well as our understanding of the abundance and dispersal abilities of this invader.
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Jain, A., X. Yang, H. Kheshgi, A.D. McGuire, and W.M. Post. December 2008. Nitrogen attenuation of terrestrial carbon cycle response to global environmental change. Fall Meeting of the American Geophysical Union, San Francisco, California.
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December 2008
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Jafarov, E.E., H. Genet, V.E. Romanovsky, A.D. McGuire, and S.S. Marchenko. 2012. The effects of forest fire on the frozen soil thermal state. Meeting of the American Geophysical Union, San Francisco, California.
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December 2012
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Preliminary results indicate that recovery of the permafrost thermal state depends on the successional growth rate of the upper organic layer and on
the amount of available soil moisture.
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Iversen, C.M., V.L. Sloan, P. Sullivan, E.S. Euskirchen, A.D. McGuire, R.J. Norby, A.P. Walker, J. Warren, and S.D. Wullschleger. 2013. Leaves are just the tip of the iceberg: A review of plant roots in arctic Alaska. Meeting of the American Geophysical Union, San Francisco, California.
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December 2013
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Our goal in this review is to synthesize the available literature on arctic roots, and also their treatment in models. Future research should focus on estimates of arctic root production and lifespan, across the diversity of tundra ecosystems that exist in the Arctic. Improved linkages between root traits and easily-measured aboveground traits will facilitate the representation of roots in large-scale land surface models, and advance our understanding of the contribution of roots to ecosystem C
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Huntsman, B.M., Falke, J.A., Saveride, J., and K. Bennett. 2015. Density-dependent and -independent mechanisms influencing spawning habitat selection by Chinook Salmon (Oncorhynchus tshawytscha) in the Chena River basin, Alaska. Alaska Chapter American Fisheries Society Annual Meeting, Homer, Alaska, 4-6 November 2015
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November 2015
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For struggling populations, such as Chena River Chinook Salmon, distinguishing between the strength of density-dependent and -independent mechanisms along the riverscape would be useful for managers working to restore historic levels of salmon productivity. We found that that spawning habitat in both the core and periphery were actively defended by Chinook salmon, although there was strong evidence for ideal-free distribution as well.
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Hugelius, G., A.D. McGuire, T.J. Bohn, E.J. Burke, S. Chadburn, G. Chen, X. Chen, D.J. Hayes, E.E. Jafarov, C.D. Koven, A.H. MacDougall, S. Peng, and K.M. Schaefer. 2016. Comparing permafrost soil carbon pools from coupled earth system models to empirically derived datasets. Eleventh International Conference on Permafrost. Potsdam, Germany. Oral Presentation.
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June 2016
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Here we compare the soil carbon pools generated by coupled spin-up runs of a suite of earth system models from the Permafrost Carbon Network model intercomparison (Koven et al., 2015; McGuire et al., in preparation) to the empirically based maps of soil carbon storage in the Northern Circumpolar Soil Carbon Database (NCSCD; Hugelius et al., 2014). These types of comparisons reveal interesting trends that can provide semi-quantitative relationships between soil forming processes and observed mod
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Hoy, E., E.S. Kasischke, M.R. Turetsky, E.S. Kane, K.M. Barrett, and A.D. McGuire. December 2010. Drivers of vulnerability of carbon stocks to variations in the fire regime in Alaskan boreal forests. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2010
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Hinzman, L. D., N. Bettez, W. R. Bolton, F. S. Chapin, M. B. Dyurgerov, C. L. Fastie, B. Griffith, R. D. Hollister, A. Hope, H. P. Huntington, A. M. Jensen, G. J. Jia, T. Jorgenson, D. L. Kane, D. R. Klein, G. Kofinas, A. H. Lynch, A. H. Lloyd, A. D. McGuire, F. E. Nelson, M. Nolan, W. C. Oechel, T. E. Osterkamp, C. H. Racine, V. E. Romanovsky, R. S. Stone, D. A. Stow, M. Sturm, C. E. Tweedie, G. L. Vourlitis, M. D. Walker, D. A. Walker, P. J. Webber, J. Welker, K. S. Winker, and K. Yoshikawa. December 2004. Evidence and implications of recent climate change in northern Alaska and other Arctic Regions. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2004
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Hinzman, L. D., N. Bettez, F. S. Chapin, M. Dyurgerov, C. Fastie, D. B. Griffith, A. Hope, H. P. Huntington, A. Jensen, D. L. Kane, G. Kofinas, A. Lynch, A. Lloyd, A. D. McGuire, F. E. Nelson, T. Osterkamp, W. C. Oechel, C. Racine, V. E. Romanovsky, J. Schimel, D. Stow, M. Sturm, C. E. Tweedie, G. Vourlitis, M. Walker, P. J. Webber, J. Welker, K. Winker, and K. Yoshikawa. December 2002. Evidence and implications of recent climate change in terrestrial regions of the Arctic. Fall Meeting, American Geophysical Union, San Francisco, California.
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December 2002
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Hinkle, E.G., and J.A. Falke. 2019. Aquatic food web and community response to wildfire in interior Alaska boreal streams. American Fisheries Society and The Wildlife Society Joint Annual Conference, Reno, Nevada, 29 September to 3 October, 2019.
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September 2019
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Wildfires are the primary natural disturbance in boreal forest stream ecosystems and fire regimes are expected to continue to change owing to climate warming. Understanding how mass-abundance relationships and food web structure relate to variables associated with fire disturbance may promote a better understanding of how climate warming and fire interact to impact boreal stream ecosystem food webs and provide insight into community-wide responses to wildfire.
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Hinkle, E.G., Strohm-Klobucar, D.D., and J.A. Falke. 2020. Aquatic food web and community response to wildfire in interior Alaska boreal streams. Alaska Chapter of the American Fisheries Society Annual Meeting. Fairbanks, Alaska. March, 2020.
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March 2021
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Wildfire is the primary natural disturbance in boreal forest stream ecosystems and fires are expected to continue to increase in duration and frequency owing to climate change. Knowledge of how aquatic community and food web structure relate to variables associated with fire disturbance may promote a better understanding of how climate change and fire interact to impact boreal stream ecosystems and provide insight into community-wide responses to wildfire.
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Hinkle, E.G., Strohm-Klobucar, D.D., and J.A. Falke. 2020. Aquatic food web and community response to wildfire in interior Alaska boreal streams. Alaska Chapter of the American Fisheries Society Annual Meeting. Fairbanks, Alaska. March, 2020.
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March 2020
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Wildfire is the primary natural disturbance in boreal forest stream ecosystems and fires are expected to continue to increase in duration and frequency owing to climate change. Knowledge of how aquatic community and food web structure relate to variables associated with fire disturbance may promote a better understanding of how climate change and fire interact to impact boreal stream ecosystems and provide insight into community-wide responses to wildfire.
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Hinkle, E.G., Strohm-Klobucar, D.D., and Falke, J.A. 2022. Stream habitat and assemblage response to wildfire in interior Alaska boreal streams. Oregon Chapter of the American Fisheries Society Virtual Meeting. 2-4 March 2022.
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March 2022
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Wildfire is the primary natural disturbance in boreal forest stream ecosystems and fires are expected to continue to increase in duration and frequency owing to climate change. Knowledge of how aquatic community and food web structure relate to variables associated with fire disturbance may promote a better understanding of how climate change and fire interact to impact boreal stream ecosystems and provide insight into community-wide responses to wildfire.
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Hinkle, E.G., Strohm-Klobucar, D.D., and Falke, J.A. 2022. Stream habitat and assemblage response to wildfire in interior Alaska boreal streams. Alaska Chapter of the American Fisheries Society Virtual Meeting. March 2022.
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February 2022
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Wildfire is the primary natural disturbance in boreal forest stream ecosystems and fires are expected to continue to increase in duration and frequency owing to climate change. Knowledge of how aquatic community and food web structure relate to variables associated with fire disturbance may promote a better understanding of how climate change and fire interact to impact boreal stream ecosystems and provide insight into community-wide responses to wildfire.
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Hinkle, E.G., Falke, J.A. 2022. The immediate and lasting effects of wildfire in subarctic streams. American Fisheries Society Annual Meeting, 21-27 August 2022, Spokane, WA.
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August 2022
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Wildfire is the primary natural disturbance in boreal forest stream ecosystems and fires are expected to continue to increase in duration and frequency owing to climate change. Knowledge of how aquatic communities relate to variables associated with fire disturbance may promote a better understanding of how climate change and fire interact to impact boreal stream ecosystems.
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Hinkle, E., Wooller, M., Westley, P., Falke, J.A. 2023. Arctic Grayling (Thymallus arcticus) physiology and movement behavior across a fire-impacted boreal riverscape Alaska Chapter American Fisheries Society Conference. March 2023.
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March 2023
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We quantified movement patterns using fin ray-derived strontium isotope ratios (<sup>87</sup>Sr/<sup>86</sup>Sr) and measured physiological metrics for Arctic Grayling, a species that exhibit high lifelong site fidelity across a riverscape affected by wildfire in interior Alaska. The behavioral and physiological responses of fishes to wildfire may impart resilience to fire disturbance, which will be especially important in light of a fiery future in Alaska boreal aquatic ecosystems.
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Hinkle E., and J. Falke. 2019. The effects of fire disturbance on stream fish community structure, site fidelity, life history, and genetic relatedness in boreal stream ecosystems. Alaska Chapter American Fisheries Society Annual Meeting, Sitka, Alaska, 19-21 March, 2019.
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March 2019
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Wildfires are the most prominent natural disturbance events throughout the boreal forest ecosystem, and their size, frequency, and intensity are expected to continue to increase throughout the next century owing to climate change. This research will enhance our understanding of the health of freshwater ecosystems, and provide land and fire managers a more comprehensive framework of how future wildfires will affect freshwater aquatic ecosystems.
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Hewitt, R.E., H. Genet, D.L. Taylor, A.D. McGuire, and M.C. Mack. 2017. The role of deep nitrogen and dynamic rooting profiles on vegetation dynamics and productivity in response to permafrost thaw and climate change in Arctic tundra. Fall 2017 Meeting of the American Geophysical Union. New Orleans, Louisiana. Oral Presentation.
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December 2017
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The release of permafrost-derived nitrogen (N) has the potential to fertilize tundra vegetation, modulating plant competition, stimulating productivity, and offsetting carbon losses from thawing permafrost. Dynamic rooting, mycorrhizal interactions, and coupling of N availability and root N uptake have been identified as gaps in ecosystem models. As a first step towards understanding whether arctic plants can access deep permafrost-derived N, we characterized rooting profiles and quantified acq
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Hewitt, R.E., D.L. Taylor, H. Genet, A.D. McGuire, and M.C. Mack. 2016. Deep nitrogen acquisition in warming permafrost soils: Contributions of belowground plant traits and fungal symbioses in the permafrost carbon feedback to climate. Fall Meeting of the American Geophysical Union, San Francisco, California. Oral Presentation.
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December 2016
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Plant acquisition of nitrogen (N) from thawing permafrost has the potential to play a critical role in the trajectory of future climate change. Our research provides a view belowground and mechanistic insight into plant responses to changing permafrost conditions as a first step towards understanding N regulation of the permafrost C feedback to climate.
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Hermus, J.H., J.D. Muehlbauer, D.J. Rinella, V.R. von Biela, J.A. Falke. 2024. The effects of heat stress on juvenile Chinook and Coho Salmon growth in the Deshka River. Mat-Su Salmon Science and Conservation Symposium, Palmer, Alaska, 18-19 November 2024.
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November 2024
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This presentation is an introduction to John Hermus’ master’s thesis. This project will analyze data from the Deshka River watershed, with the goal of understanding the effects of water temperature and heat stress on juvenile Chinook and Coho Salmon growth in the face of a changing climate.
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Hermus, J.H., J.D. Muehlbauer, D.J. Rinella, V.R. von Biela, J.A. Falke. 2023. The effects of water temperature and heat stress on juvenile Chinook Oncorhynchus tshawytscha, and Coho Salmon Oncorhynchus kisutch growth in the Deshka River watershed. Mat-Su Salmon Science and Conservation Symposium, Palmer, Alaska, 13-14 November 2023.
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November 2023
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This presentation is an introduction to John Hermus’ master’s thesis. This project will analyze data from the Deshka River watershed, with the goal of understanding the effects of water temperature and heat stress on juvenile Chinook and Coho Salmon growth in the face of a changing climate.
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Hermus, J.H., J.D. Muehlbauer, D.J. Rinella, V.R. von Biela and J.A. Falke. 2024. The effects of water temperature and heat stress on juvenile Chinook (Oncorhynchus tshawytscha), and Coho Salmon (Oncorhynchus kisutch) growth in the Deshka River watershed. Alaska Chapter American Fisheries Society Annual Meeting, Seward, Alaska, 25-29 March 2024.
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March 2024
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This presentation is an introduction to John Hermus’ masters thesis. This project will analyze data from the Deshka River watershed, with the goal of understanding the effects of water temperature and heat stress on juvenile Chinook and Coho Salmon growth in the face of a changing climate.
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Hepler, J., B. Griffith, J. Falke, J. Roach, J. Caikoski, and M. Cameron. 2019. Validating a GPS collar-based method to estimate calving locations and parturition rates in the Porcupine caribou herd. American Fisheries Society and The Wildlife Society Joint Annual Conference, Reno, Nevada, 29 September - 3 October, 2019.
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September 2019
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Recently developed methods based on minimum travel rates of GPS-collared caribou have shown promise for remotely monitoring calving, but these methods were developed for non-migratory rather than migratory caribou. Managers may use our results to implement a new tool for remote monitoring of migratory caribou parturition rates, calving locations and dates.
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Heimann, M., I. C. Prentice, J. Foley, T. Hickler, D. W. Kicklighter, A. D. McGuire, J. M. Melillo, N. Ramankutty, and S. Sitch. December 2001. Carbon Cycle Model Linkage Project (CCMLP): Evaluating biogeochemical process models with atmospheric measurements and field experiments. Fall Meeting, American Geophysical Union, San Francisco, CA. Invited.
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December 2001
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Heim, KC, TE McMahon, JA Falke, MS Wipfli. 2018. Unexpected places: the use of temporary aquatic habitats by fish, implications for conservation, and research needs. American Fisheries Society Annual Meeting, Atlantic City, NJ.
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August 2018
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Work highlights the importance of intermittent aquatic habitats for fishes. Points out how fish use these habitats seasonally for feeding, dispersal, and spawning during parts of the year, emphasizing the need for conservation.
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Heim, K.C., M.S. Wipfli, M.S. Whitman, N.D. Sather, and M.B. Loewen. 2012. Seasonal movement patterns of arctic grayling (Thymallus arcticus) in a small beaded stream on the Arctic Coastal Plain, Alaska. American Fisheries Society Alaska Chapter meeting, Kodiak, AK, 24-26 Oct.
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October 2013
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He, Y., Q. Zhuang, J.W. Harden, A.D. McGuire, Z. Fan, and Y. Liu. 2013. The implications of microbial and substrate limitation for the fates of carbon in different organic soil horizon types: A mechanistically based model analysis. Fall Meeting of the American Geophysical Union, San Francisco, California.
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December 2013
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In this study, we developed a multi-layer mechanistically based soil decomposition model framework for boreal forest ecosystems. A global sensitivity analysis was conducted to identify dominating biogeochemical processes and to highlight structural limitations was conducted. Our results indicates that substrate availability is likely to be a major constraint on soil decomposition in fibrous horizon (explains 50-60% of SOC pool size variation), while microbial activity exerts a predominant cont
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Hayes, D.J., R. Vargas, S. Alin, R.T. Conant, L.R. Hutyra, A.R. Jacobson, W.A. Kurz, S. Liu, A.D. McGuire, B. Poulter, and C.W. Woodall. 2017. SOCCR-2, Chapter 2: A synthesis of the North American carbon budget. Fall 2017 Meeting of the American Geophysical Union. Poster Presentation.
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December 2017
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Here we present a synthesis of the North American carbon budget for the next report (SOCCR-2) based on updated inventory data and new research over the last decade. The North American continent— including its energy systems, land-base and coastal oceans—is very likely to have been a net source of carbon to the atmosphere over the 2004-2013 time period,
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Hayes, D.J., R. Vargas, S. Alin, R.T. Conant, L.R. Hutyra, A.R. Jacobson, W.A. Kurz, S. Liu, A.D. McGuire, B. Poulter, and C.W. Woodall. 2016. The North American carbon budget past, present and future. Fall 2016 Meeting of the American Geophysical Union. Oral Presentation.
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December 2016
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The North American continent (NA) has been considered to be a significant net source of carbon to the atmosphere, with fossil fuel emissions from the U.S., Canada and Mexico far outpacing uptake on land, inland waters and adjacent coastal oceans. Here we present a synthesis of the NA carbon budget for the next report (SOCCR-2) based on updated inventory data and new research over the last decade.
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Hayes, D.J., P. Kuhry, S. Goswami, G. Grosse, A.D. McGuire, and E.A.G. Schuur. 2016. The Permafrost Regionalization Map (PeRM): How well do observations, models and experiments represent the circumarctic-scale spatial variability in permafrost carbon vulnerability? Eleventh International Conference on Permafrost. Potsdam, Germany. Poster Presentation.
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June 2016
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We developed a geospatial data synthesis and analysis framework designed to represent and characterize the variability in permafrost carbon vulnerability across the northern high latitudes. Overall, this spatial data synthesis framework work provides a critical bridge between the abundant but disordered observational and experimental data collections and the development of higher-complexity process representation of the permafrost carbon feedback in geospatial modeling frameworks.
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Hayes, D.J., J.B. Fisher, E.J. Stofferahn, C.R. Schwalm, D.N. Huntzinger, and A.D. McGuire. 2016. A model-data integration framework for NASA-ABoVE: The role of remote sensing in process-based model representation of Arctic ecosystem dynamics. 14th International Circumpolar Remote Sensing Symposium. Homer, Alaska.
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September 2016
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Here, we demonstrate the use of remote sensing to evaluate and improve model performance in simulating Arctic ecosystem dynamics, with a focus on identifying critical gaps in data and process representation.
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Hayes, D.J., G. Chen, G. Stinson, W. Kurz, and A.D. McGuire. 2013. The role of disturbance in driving carbon dynamics across the North American Boreal Forest in recent decades. Meeting of the American Geophysical Union, San Francisco, California.
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December 2013
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Here, we demonstrate results from an updated approach that integrates observational data and inventory-based information on disturbances with process-level representation of ecological dynamics using a terrestrial biogeochemistry model. The integrated approach allows for continental-scale diagnosis of the carbon sink within a simulation framework for attributing the impacts of fire and insect disturbances relative to the major driving forces, including climate, atmospheric chemistry, forest ma
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Hayes, D.J., D.W. Kicklighter, A.D. McGuire, M. Chen, Q. Zhuang, J.M. Melillo, and S.D. Wullschleger. 2012. The impact of permafrost thaw on land-atmosphere greenhouse gas exchange in recent decades over the northern high latitudes. Meeting of the American Geophysical Union, San Francisco, California.
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December 2012
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This represents a significant factor in the overall land-based greenhouse gas source of 640 MtCO2eq/yr, and an additional 6.8% contribution on top of the combined 7792 MtCO2eq/yr fossil fuel emissions from the eight Arctic nations over this time period.
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Hayes, D.J., D.P. Turner, G. Stinson, Y Wei, T.O. West, B. deJong, A.D. McGuire, R. Cook, and W.M. Post III. August 2011. Towards better-constrained assessments of the carbon balance of North America in the 21st century: A comparison of recent model and inventory-based estimates. Annual Meeting, Ecological Society of America, Austin, TX.
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August 2011
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Hayes, D.J., D.P. Turner, G. Stinson, A.D. McGuire, Y. Wei, T.O. West, L.S. Heath, B.H. de Jong, B.G. McConkey, R. Birdsey, W.A. Kurz, A.R. Jacobson, D.N. Huntzinger, Y. Pan, W.M. Post, and R.B. Cook. December 2011. Reconciling estimates of the contemporary North American carbon balance among an inventory-based approach, terrestrial biosphere models, and atmospheric inversions. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2011
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Hayes, D.J., C.E. Smyth, G. Chen, W.A. Kurz, A.D. McGuire, and G. Stinson. 2015. Improving the assessment of the State of the Carbon Cycle in North America by integrating inventory- and process- based approaches: A case study for Canada. Fall Meeting of the American Geophysical Union. Poster Presentation.
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December 2015
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Here, we demonstrate results from an updated approach that integrates inventory-based information on management and disturbances with process-level representation of ecological dynamics using a terrestrial biogeochemistry model.
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Hayes, D.J., A.D. McGuire, W.M. Post, L.S. Heath, W.A. Kurz, G. Stinson, M.M. Thornton, Y. Wei, T.O. West, and NACP Regional Synthesis Participants. December 2009. Towards better-constrained assessments of the carbon balance of North America in the 21st Century: A comparison of recent model and inventory-based estimates. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2009
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Hayes, D.J., A.D. McGuire, D.W. Kicklighter, K.R. Gurney, T.J. Burnside, and J.M. Melillo. December 2009. Recent changes in the strength of the CO2 sink in boreal land regions. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2009
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Hayes, D.J., A.D. McGuire, D.W. Kicklighter, K.R. Gurney, T.J. Burnside, and J.M. Melillo. December 2008. A recent shift in the carbon balance of high-latitude terrestrial ecosystems in response to changes in climate and disturbance regime. Fall Meeting of the American Geophysical Union, San Francisco, California.
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December 2008
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Hayes, D., G. Stinson, W. Kurz and A.D. McGuire. 2013. Multi-factor analysis of the forces driving carbon dynamics in the North American Boreal Forest over recent decades. 16th International Boreal Forest Research Association Conference, Edmonton, Alberta, Canada.
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October 2013
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Our results suggest that CO2 uptake by the region’s forests may not be as strong as estimated by atmospheric inverse models, or other process-based models that do not consider permafrost dynamics, fire impacts, and other important drivers of boreal forest carbon cycling in boreal forests. Such changes create positive feedbacks to the climate system that accelerate global warming, putting further pressure on emission reductions to achieve atmospheric stabilization targets.
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Hayes, D., G. Chen, W. Kurz, G. Stinson, and A.D. McGuire. 2015. On the integration of inventory- and process- based approaches to determine Canada’s full forest carbon budget and the forces that drive it. North American Carbon Program Meeting. Washington, DC.
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January 2015
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Our results suggest that CO2 uptake by the region’s forests may not be as strong as estimated by atmospheric inverse approaches, or other process-based models that do not consider permafrost dynamics, fire and insect impacts, and other important drivers of carbon cycling in boreal forests. Such changes create positive feedbacks to the climate system that accelerate global warming, putting further pressure on emission reductions to achieve atmospheric stabilization targets.
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Hayes, D., D. Kicklighter, A.D. McGuire, Q. Zhuang, J. Melillo, and S. Wullschleger. 2013. The impacts of permafrost thaw on land-atmosphere greenhouse gas exchange. Fourth North America Carbon Program All Investigators Meeting, Albuquerque, New Mexico.
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February 2013
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This net forcing represents a significant factor in the estimated 640 MtCO2eq/yr pan-arctic GHG source, and an additional 6.9% contribution on top of the combined 7792 MtCO2eq/yr fossil fuel emissions from the eight Arctic nations over this time period.
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Hayes, D. J., A. D. McGuire, D. W. Kicklighter, and T. J. Burnside. March 2008. Effects of climate, natural disturbance, forest management, and land use on carbon dynamics in terrestrial ecosystems of northern Eurasia. First Workshop of the NEESPI Focus Research Center for Biogeochemical Cycles, Max-Planck Institute for Biogeochemistry, Jena, Germany. Invited.
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March 2008
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Harwood, C.M. and A. N. Powell. 2013. Breeding distribution of Whimbrels in Alaska. 5th Western Hemisphere Shorebird Conference, Santa Marta, Colombia.
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September 2013
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Little is known about the distribution of breeding shorebirds in Alaska's interior. We present preliminary data on the distribution of whimbrels in interior Alaska based on historical records and current surveys.
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Harwood, C., and A. Powell. 2011. Breeding ecology of Whimbrels in interior Alaska. 4th Western Hemisphere Shorebird Group Meeting, Vancouver, B.C.
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August 2011
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Harwood, C. and A. N. Powell. 2012. Breeding ecology of Whimbrels in interior Alaska. 23 Oct, 15th Annual Alaska Bird Conference, Anchorage, AK.
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October 2012
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Harwood, C. M. and A. N. Powell. 2014. Nesting Whimbrels: The Rush to Flush. 16th Alaska Bird Conference, Juneau, AK.
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December 2014
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We evaluate whether Whimbrels select nest based on potential concealment from predators and ability to detect predators.
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Harwood, C. M. and A. N. Powell. 2013. Breeding ecology of Whimbrels in Interior Alaska. Alaska Chapter of The Wildlife Society Conference, Fairbanks, AK.
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April 2013
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Little is known about any shorebird species nesting in Alaska's interior habitats. We present preliminary results of a study on breeding ecology of Whimbrels at Kanuti National Wildlife Refuge, Alaska.
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Harings, M., Schoen, E., Hill, J., Falke, J., Matter, A., Savereide, J., McKenna, B., Ransbury, S., Keyse, M., and A. Lopez. 2022. Evaluating Environmental DNA as a Complementary Tool for Estimating Salmon Abundance in the Yukon River Basin. Alaska Chapter American Fisheries Society Annual Meeting, Virtual Meeting, 28 February - 4 March, 2022.
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February 2022
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Daily salmon abundance estimates guide critical in-season management decisions that impact subsistence fishing throughout the Yukon River Basin. The long-term vision of this project is to build capacity to support cost-effective monitoring of fish populations and enhance climate change resilience in salmon assessment throughout Alaska.
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Harings, M., Schoen, E., Falke, J., Matter, A., Savereide, J., McKenna, B., Farnham, N., Hill, J., and A. Lopez. 2022. Using quantitative PCR to estimate chum salmon abundance using environmental DNA on the Chena River. Alaska Chapter American Fisheries Society Annual Meeting, 28-30 March, 2023. Fairbanks, AK.
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March 2023
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In recent years increased frequency of high streamflow events resulted in periodic gaps in salmon escapement estimates when increased water levels limited the ability to conduct visual counts or use sonar technology. We tested a complementary method to assess salmon abundance using concentrations of environmental DNA (eDNA) shed by salmon into the water using validated species-specific quantitative PCR assays.
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Harden, J.W., M.R. Turetsky, M. Conlin, E. Kane, A.D. McGuire, and K.L. Manies. May 2009. The influence of seasonal thaw and water table dynamics on soil carbon and trace gas flux in an ecosystem grandient in Interior Alaska. Spring Meeting of the American Geophysical Union, Toronto, Canada.
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May 2009
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Harden, J.W., K.D. Johnson, C.R. Lawrence, K.L. Manies, A.D. McGuire, J.A. O’Donnell, and M.P. Waldrop. March 2010. Carbon in terrestrial landscapes: Is the past the key to the future? U.S. Geological Survey Global Change Conference, Denver, CO.
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March 2010
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Harden, J., M. Turetsky, J. Carrasco, K. Manies, A. D. McGuire, J. Neff, M. Pavich, N. Rosenbloom, S. Trumbore, and Q. Zhuang. July 2003. Towards understanding long-term terrestrial carbon: Mechanisms, modern tools, and modeling of soil systems. XVI INQUA Congress, Reno, Nevada.
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July 2003
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Harden, J., K. Manies, and A. D. McGuire. April 2006. Resilience of Alaskan boreal systems: The mechanistic role of soil temperature in fractal geometry of fire scars. Annual Meeting, European Geophysical Union, Vienna, Austria.
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April 2006
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Harden, J. W., A. D. McGuire, J. Neff, K. P. O'Neill, B. J. Stocks, and Q. Zhuang. November 2002. Soil carbon of northern latitudes and their potential for CO2 exchange. USDA Symposium on Natural Resource to Offset Greenhouse Gas Emissions, Raleigh, North Carolina. Invited.
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November 2002
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Harden, J. W. and A. D. McGuire. October-November 2000. The biogeochemistry of fire: Modeling and measuring the impact of fire on carbon, nutrients, and atmospheric emissions. Wildlife Fire Workshop, U.S. Geological Survey, Los Alamos, New Mexico.
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November 2000
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Gutierrez, L., M.S. Wipfli, N.F. Hughes, and E.C. Green. November 2009. Patterns of prey abundance for juvenile Chinook salmon in the Chena River, interior Alaska. American Fisheries Society Alaska Chapter annual meeting, Fairbanks, AK. (AFS abstract)
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November 2009
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Grosse, G., J. Harden, M.R. Turetsky, A.D. McGuire, P. Camill, C. Tarnocai, S. Frolking, T. Schuur, T. Jorgenson, S. Marchenko, and V. Romanovsky. February 2011. Vulnerability of high latitude soil carbon in North America to disturbance. Third North American Carbon All-Investigators Meeting, New Orleans, LA.
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February 2011
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Grosse, G., A.B.K. Sannel, B. Abbott, C. Arp, P. Camill, J. O’Donnell, L. Farquharson, F. Günther, D. Hayes, B.M. Jones, M.T. Jorgenson, S. Kokelj, P. Kuhry, H. Lee, J. Lenz, A. Lewkowicz, L. Liu, A.D. McGuire, A. Morgenstern, I. Nitze, D. Olefeldt, A. Parsekian, V. Romanovsky, P. Roy-Léveillée, E.A.G. Schuur, M. Turetsky, K. Walter Anthony, and S. Wullschlaeger. 2016. A synthesis of thermokarst and thermo-erosion rates in northern permafrost regions. Fall 2016 Meeting of the American Geophysical Union. Oral Presentation. Invited.
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December 2016
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Here we present a comprehensive review synthesizing measured and modeled rates of thermokarst and thermo-erosion processes from the scientific literature and own observations across the northern Hemisphere permafrost regions.
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Griffith, B., Szepanski, S., and L. G. Adams. 2011. Independence of overwinter weight change and fall condition for moose calves in Alaska. Poster presented at the annual meeting of The Wildlife Society, Hawaii, November 2011.
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November 2011
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Griffith, B., J.M. Scott, D. Ashe, and J. Baron. March 2010. Climate change adaptation options for public lands and resources. USGS Global Change Conference, Denver, CO.
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March 2010
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Griffith, B., J. Roach, and V. Patil. Lake shrinkage in Alaskan National Wildlife Refuges: Heterogeneity and implications. Paper presented ant the 2013 annual meeting of the Alaska Chapter of The Wildlife Society, 3 April 2013. Fairbanks, Alaska.
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April 2013
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This documents rates of lake drying in 8 National Wildlife Refuges in Alaska that ranged from +0.3 to -3.0%/year. Half of refuges may lose 35-77% of lake area within 50 years if current trends continue.
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Griffith, B., J. Roach and A. N. Powell. 2016. Identifying Climate Change and Cross-seasonal Research Priorities for Waterfowl. in Symposium: Climate Change and Migratory Birds: Connecting Management Challenges to Research Programs. The Wildlife Society, Annual Meeting, Raleigh NC
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October 2016
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There is a need to prioritize climate related research topics to maximize research efficiency. This talk presents preliminary results from a survey of waterfowl researchers and managers that identifies the most important factors affecting waterfowl populations and the expected effects of climate on waterfowl, via these factors.
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Griffith, B., J. P. Lawler, and D. Johnson. September 2006. Dall's sheep responses to military overflights in interior Alaska. Poster Session 35, The Wildlife Society 2006 Annual Meeting, Anchorage, AK.
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September 2006
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Griffith, B., D.C. Douglas, and N.G. Platonov. March 2010. Heterogeneity in habitat trends among circumpolar Rangifer herds. Paper presented at Special Session 3.4, Heterogeneity and Resilience of Human-Rangifer Systems: A Circumpolar Social-Ecological Synthesis. ARCSS, State of the Arctic, Miami, FL.
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March 2010
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Griffith, B., D. E. Russell, and G. P. Kofinas. February 2002. A continental system for barren-ground caribou habitat assessment. Alaska Oil and Gas Association North Slope Conference, Fairbanks, Alaska.
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February 2002
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Griffith, B., D. E. Russell, and G. Kofinas. April 2001. A continental system for barren-ground caribou habitat assessment. Ninth North American Caribou Workshop, Kuujjuaq, Canada.
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April 2001
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Griffith, B., D. C. Douglas, R. G. White, and D. E. Russell. September 2003. Climate, Fall Forage Availability, and Parturition in Barren Ground Caribou. 54th Arctic Science Conference, AAAS, Fairbanks, Alaska.
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September 2003
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Griffith, B., D. C. Douglas, R. G. White, and D. E. Russell. May 2004. Climate, fall forage availability, and parturition in barren-ground caribou. Tenth North American Caribou Workshop, Girdwood, Alaska.
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May 2004
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Griffith, B., D. C. Douglas, R. G. White, D. E. Russell, and P. A. McNeil. September 2004. Differential effects of summer and winter warming on caribou habitats: Population implications. Eleventh Annual Conference, The Wildlife Society, Calgary, Alberta, Canada.
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September 2004
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Griffith, B., C. Cuyler, R.G. White, L.G. Adams, D.E. Russell, D.C. Douglas, A. Gunn, and R.D. Cameron. February 2010. Implications of a greener north for Arctic caribou: Is trophic mismatch likely? Plenary Session, Alaska Chapter of The Wildlife Society Annual Meeting, Anchorage, AK.
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February 2010
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Griffith, B. and J.M. Scott. November 2008. Climate change adaptation options for U.S. National Wildlife Refuges. Session on Human Dimensions, Conservation Education, and Conservation Policy, The Wildlife Society 15th Annual Conference, Miami, FL.
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November 2008
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Griffith, B. and J.M. Scott. August 2009. Climate change adaptation options for public lands and resources. Organized Oral Session 6 (Climate Change Science in Conservation Planning) of 94th Ecological Society of America Annual Meeting, Albuquerque, NM.
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August 2009
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Griffith, B. and J. M. Scott. April 2008. Climate change and wildlife refuges: managing for resilience in the face of uncertainty. Invited presentation, Desert Managers Group Climate Change Symposium, 9 April 2008, Laughlin, NV.
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April 2008
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Griffith, B. September 2009. Careers in Natural Resources. Invited Panelist, University of Idaho 100th Year Celebration, College of Natural Resources, Moscow, ID.
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September 2009
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Griffith, B. October 2008. Linking climate, habitat and populations: Scale, uncertainty and mechanisms. WILDlife Potential Habitat ForeCASTing Framework (WILDCAST) Workshop, USGS and NPS, Fairbanks, AK. Invited.
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October 2008
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Griffith, B. October 2007. Climate warming effects on habitats and populations in Alaska: implications for ?Outside. Invited presentation, U.S. Fish and Wildlife Service Regional Biologists Meeting, 2 October 2007, Bethesda, MD.
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October 2007
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Griffith, B. November 2008. Herbivore trophic dynamics: Potential influences of climate warming. Workshop on Wildlife Responses to Environmental Arctic Change (WildREACH): Predicting Future Habitats of Arctic Alaska, USFWS, Fairbanks, AK. Invited.
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November 2008
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Griffith, B. November 2006. Heterogeneity in climate warming: Effects on fish, wildlife, and habitats. Alaska Chapter Annual Meeting, American Fisheries Society, Fairbanks, AK. Invited.
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November 2006
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Griffith, B. March 2011.Climate, large mammals and wetlands. USGS, Ecosystems Strategic Science Planning Team Symposium, Menlo Park, CA.
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March 2011
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Griffith, B. March 2011. Effects of climate change on the Yukon River Basin: Changes in water and implications for wildlife habitat, human subsistence, and climate regulation. Alaska Cooperative Fish and Wildlife Research Unit Coordinating Committee meeting, University of Alaska Fairbanks.
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March 2011
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Griffith, B. June 2007. Inconvenient answers: Experiences at the interface of biological research and public policy early in the 21st century. Seventy-seventh Annual Meeting, Cooper Ornithological Society, Moscow, ID.
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June 2007
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Griffith, B. June 2007. Climate induced biome shifts and their implications for management of trust species of the National Wildlife Refuge system. Seventy-seventh Annual Meeting, Cooper Ornithological Society, Moscow, ID.
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June 2007
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Griffith, B. January 2011. Yukon River Basin: Lake change and biodiversity. Yukon River Basin Investigators Meeting, Portland, OR.
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January 2011
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Griffith, B. January 2010. Caribou in the dynamic Arctic. “Why the Arctic Matters” Symposium, Western Oregon University, Monmouth, OR. Invited.
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January 2010
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Griffith, B. January 2009. Ungulate distributions in Arctic Alaska. Pilot Effort for Integrated Arctic Assessment Planning Meeting, USGS, Anchorage, AK.
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January 2009
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Griffith, B. January 2005. Application of remote sensing data to the assessment of circumpolar Rangifer habitats and populations. Charter Meeting, Circum-Arctic Rangifer Monitoring and Assessment Network, Vancouver, British Columbia, Canada.
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January 2005
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Griffith, B. February 2007. US Climate Change Science Program Synthesis and Assessment Product 4.4. Alaska Forum on the Environment, Anchorage, AK.
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February 2007
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Griffith, B. February 2007. US Climate Change Science Program Synthesis and Assessment Product 4.4. USFWS Climate Change Forum, Anchorage, AK.
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February 2007
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Griffith, B. December 2008. Panel Member – Session on Biodiversity in a Rapidly Changing Arctic. 9th National Conference on Science, Policy and the Environment. Washington, DC. Invited.
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December 2008
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Griffith, B. 2010. Heterogeneity in habitat trends among circumpolar Rangifer herds. 12th North American Caribou Workshop, Winnipeg, SK, Canada.
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October 2010
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Griffith, B. 2006. Heterogeneity in climate warming effects on wildlife habitats and populations. Invited plenary speaker, The Wildlife Society 2006 Annual Meeting, Anchorage, AK.
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September 2006
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Griffith, B. (Chair), V.J. Meretsky, and L.A. Maguire. 2013. Symposium: “A National Network for Wildlife Conservation: Challenges and Solutions.” 26th International Congress for Conservation Biology, Baltimore, MD. 24 July 2013.
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July 2013
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Publicized a discussion of a National Network for Wildlife Conservation proposed in Meretsky et al. 2012. Presented forum for various agencies and NGOs to document their experiences and answer questions.
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Griffith, B. May 2007. Potential Implications of Lake Dynamics to Ecosystem Services. USGS Lake Dynamics Symposium, Anchorage, AK. Invited.
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May 2007
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Griffith, B. February 2011. Inconvenient answers: Experiences at the interface between biological research and public policy. Cooperative Research Units New Scientist Training Session, Reston, VA.
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February 2011
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Griffith, B. February 2007. Heterogeneity in climate warming: Effects on fish, wildlife and habitats. USFWS Climate Change Forum, Anchorage, AK. Invited.
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February 2007
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Gregovich, D.P, M.S. Wipfli, and B. Frenette. 2006. Landscape correlates of threespine stickleback (Gasterosteus aculeatus) presence in small Southeast Alaska lakes. American Fisheries Society Alaska Chapter annual meeting, Fairbanks, AK, 14-16 November.
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November 2006
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Green-Markley, E.C., M.S. Wipfli, and K.M. Polivka. 2007. Do drifting invertebrates originating from fishless headwater streams affect downstream fish? American Fisheries Society Alaska Chapter annual meeting, Ketchikan, AK, 13-15 November.
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November 2007
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Green, E.C., M.T. Perry, J.R. Neuswanger, E.R. Benson, L. Gutierrez, M.S. Wipfli, N.F. Hughes, and M.J. Evenson. November 2009. The ecology of juvenile Chinook salmon in the Chena River, interior Alaska. American Fisheries Society Alaska Chapter annual meeting, Fairbanks, AK. (AFS abstract)
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November 2009
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Green, E.C., M.S. Wipfli, and K.M. Polivka. 2008. Ecological linkages between fishless headwaters and downstream fish communities. American Fisheries Society national meeting, Ottawa, Ontario, Canada, 18-21 August.
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August 2008
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Green, E.C., M.S. Wipfli, and K.M. Polivka. 2008. Do drifting invertebrates originating from fishless headwater streams affect downstream fish? North American Benthological Society, Salt Lake City, Utah, 26-29 May.
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May 2008
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Gray, S.T., A.D. McGuire, J.S. Littell, A.L. Breen, K. Timm, and T.S. Rupp. 2017. Balancing the demands of knowledge co-production and basic research for large projects in the North American Arctic. Arctic Summit Science Week 2017. Prague, Czech Republic. Oral Presentation.
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April 2017
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Numerous federal and state/provincial agencies embarked on a multi-year, multi-million dollar effort to develop the Integrated Ecosystem Model for Alaska and Northwest Canada (IEM). Given the complexity and level of stakeholder engagement involved in developing and implementing the IEM, this project offers a number a "lessons learned" with regards to project management.
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Goswami, S., D.J. Hayes, P. Kuhry, G. Hugelius, C. Schaedel, D. Olefeldt, G. Grosse, G. Chen, A. Lewkowicz, V. Romanovsky, S. Zubrzycki, S. Gruber, J. Vonk, A.D. McGuire, and E.A.G. Schuur. 2013. A regionalization approach to study vulnerability of Pan-Arctic permafrost stock to climate change. Annual Meeting of the Ecological Society of America, Minneapolis, Minnesota.
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August 2013
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The PeRM will have many usages for the researchers within the RCN and beyond – including data synthesis, model-data integration and model benchmarking – to contribute to an improved understanding of the vulnerability of the permafrost carbon pool to climate change and the implications to the global carbon budget.
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Goswami, S., D. Hayes, P. Kuhry, G. Hugelius, A.D. McGuire, and E. Schuur. 2013. The Permafrost Regionalization Map (PeRM) for studying the vulnerability of permafrost carbon. Fourth North America Carbon Program All Investigators Meeting, Albuquerque, New Mexico.
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February 2013
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The permafrost regionalization map (PeRM) is an international effort within the RCN that aims to identify and characterize the key environmental controls on carbon vulnerability among different geographic regions across the northern permafrost domain.
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Germain, S., S. Crimmins, L. Parrett, and K. Kielland. 2023. It pays to be a fat cow: juvenile weight predicts age at primiparity in northwest Alaskan moose populations. North American Caribou Workshop and Arctic Ungulate Conference, Anchorage, AK.
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May 2023
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We evaluated the impacts of cow moose weight on future reproductive capacity in western Alaska
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Genet, J., K.M. Barrett, J.F. Johnstone, A.D. McGuire, F. Yuan, E.S., Euskirchen, E.S. Kasischke, S.T. Rupp, and M.R. Turetsky. 2012. Modeling the effects of fire severity on soil organic horizons and forest composition in interior Alaska. Meeting of the American Geophysical Union, San Francisco, California.
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December 2012
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The results of these simulations indicate that it is important for ecosystem models to represent vegetation succession in order to fully understand the consequences of changes in climate and disturbance regimes on boreal ecosystems.
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Genet, H., Y. He, A.D. McGuire, Q. Zhuang, Z. Zhu, N. Pastick, B. Wylie, and K. Johnson. 2016. Quantifying the impact of permafrost dynamics on soil carbon accumulation in response to climate change and wildfire intensification in Alaska. Eleventh International Conference on Permafrost. Potsdam, Germany. Poster Presentation.
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June 2016
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To better understand the impact of permafrost freeze and thaw dynamics on the vulnerability of soil carbon stocks, we used a process-based ecosystem model, the Terrestrial Ecosystem Model (TEM). Overall, this analysis has implications for carbon mitigation strategies of land management agencies and illustrates the importance of accounting for permafrost dynamics and disturbance regimes in assessing responses of soil carbon in high latitude ecosystems.
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Genet, H., M. Lara, W.R. Bolton, and A.D. McGuire. 2016. Modeling vulnerability to thermokarst disturbance and its consequences on regional land cover dynamics in boreal Alaska. Fall Meeting of the American Geophysical Union, San Francisco, California. Poster Presentation.
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December 2016
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Estimation of the magnitude and consequences of permafrost degradation in high latitude is one of the most urgent research challenges related to contemporary and future climate change. In addition to widespread vertical degradation, ice-rich permafrost can thaw laterally, often triggering abrupt subsidence of the ground surface called thermokarst. To better understand the vulnerability of the landscape to thermokarst disturbance in Alaska, we developed the Alaska Thermokarst Model (ATM), a stat
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Genet, H., M. Lara, W.R. Bolton, A.D. McGuire, V. Romanovsky, and M. Turetsky. 2016. Modeling landscape vulnerability to thermokarst disturbance in boreal Alaska. Eleventh International Conference on Permafrost. Potsdam, Germany. Poster Presentation.
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June 2016
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To better understand the vulnerability of the landscape to thermokarst formation in boreal Alaska, we developed the Alaska Thermokarst Model (ATM), a state-and-transition model designed to simulate ecosystem transitions associated with thermokarst disturbance in Alaska and Northwestern Canada. This analysis has allowed us to assess the importance of thermokarst dynamics and landscape evolution associated with permafrost thaw in potentially vulnerable boreal forest regions during the 21st centur
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Genet, H., K. Barrett, J. Johnstone, A.D. McGuire, F. Yuan, E. Euskirchen, E. Kasischke, S. Rupp, and M. Turetsky. 2013. Modeling the effects of changes in fire severity on soil organic horizons and forest composition in interior Alaska. Fourth North America Carbon Program All Investigators Meeting, Albuquerque, New Mexico.
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February 2013
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The results of these simulations indicate that it is important for ecosystem models to represent the influence of fire severity on post-fire vegetation succession in order to fully understand the consequences of changes in climate and disturbance regimes on boreal ecosystems.
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Genet, H., A.D. McGuire, J.F. Johnstone, A.L. Breen, E.S. Euskirchen, M.C. Mack, A.M. Melvin, T.S. Rupp, E.A. Schuur, and F. Yuan. 2013. Modeling post-fire vegetation succession and its effect on permafrost vulnerability and carbon balance. Meeting of the American Geophysical Union, San Francisco, California.
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December 2013
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In this study, we present the development of an ecosystem model that integrates post-fire succession with changes in the structure and function of organic soil horizons to better represent the relationship between fire severity and vegetation succession across the landscape. The model is then used to assess changes in the carbon balance at a 1km resolution, in response to changing fire regime across the landscape in Interior Alaska.
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Genet H., Zhang Y., McGuire A.D., He Y., Johnson K., D’Amore D., Zhou X., Bennett A., Biles F., Bliss N., Breen A., Euskirchen E.S., Kurkowski T., Pastick N., Rupp S., Wylie B., Zhu Z., and Zhuang Q. 2015. The importance of permafrost thaw, fire and logging disturbances as driving factors of historical and projected carbon dynamics in Alaskan upland ecosystems. North American Carbon Program All Scientists Meeting. Washington, DC.
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January 2015
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Our simulations showed that the increase in plant productivity in response to warming in boreal and arctic regions is offset by soil carbon loss due to permafrost degradation and wildfire combustion during both historical and future simulations. Fire disturbances act as a catalyst accelerating permafrost degradation and associated soil carbon loss. In addition, our preliminary results for south coastal regions of Alaska indicate that logging of second growth forests could influence carbon dynam
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Genet H., M. Lara, A.D. McGuire, R.W. Bolton, E.S. Euskirchen, and V. Romanovsky. 2017. Integrated evaluation of the vulnerability to thermokarst disturbance and its implications for the regional carbon balance in boreal Alaska. Fall 2017 Meeting of the American Geophysical Union. Oral Presentation. Invited.
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December 2017
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We observed a nonlinear loss of permafrost plateau forest associated with TK and driven by precipitation and forest fragmentation. The results of this analysis were integrated into the Alaska Thermokarst Model (ATM), a state-and-transition model that simulates land cover change associated with thermokarst disturbance.By 2100, the model predicts a mean decrease of 7.4% (sd 1.8%) in permafrost plateau forests associated with an increase in TK fens and bogs.
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Genet H., K. Barrett, A.D. McGuire, E.S. Kasischke, M. Turetsky, S. Rupp, E.S. Euskirchen, and F.M. Yuan. 2013. Modeling the effects of fire severity on soil organic horizons and its effects on permafrost and vegetation composition in Interior Alaska. 16th International Boreal Forest Research Association Conference, Edmonton, Alberta, Canada.
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October 2013
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Factorial simulations in Interior Alaska were then conducted from 1901 to 2100, combining various scenarios of warming and fire intensification to evaluate the relative effects of warming and fire regime on boreal ecosystems. The results of these simulations indicate that it is important for ecosystem models to represent the influence of fire severity on post-fire permafrost stability and vegetation succession in order to fully understand the consequences of changes in climate and disturbance r
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Genet H, McGuire AD, He Y, Johnson K, Wylie B, Pastick N, Zhuang Q, Zhu Z, and Zhang Y. 2015. Identifying the main drivers of soil carbon response to climate change in arctic and boreal Alaska. Fall Meeting of the American Geophysical Union. Poster Presentation.
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December 2015
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To better understand the main drivers of the vulnerability of soil carbon stocks to climate change in Alaska, we ran a process-based ecosystem model, the Terrestrial Ecosystem Model (TEM), which explicitly simulates interactions between the carbon cycle and permafrost dynamics, coupled with a disturbance model (the Alaska Frame Based Ecosystem Code, ALFRESCO) and a model of biogenic methane dynamics (MDM-TEM) to assess historical and projected soil carbon dynamics in Alaska, from 1950 to 2100,
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Geiger, H.J., and M.S. Wipfli. 2008. Ratcheting down escapements: more realistic goals, marine derived nutrient effects, or artifact of the analysis procedure? American Fisheries Society Alaska Chapter annual meeting, Anchorage, AK, 27-30 October.
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October 2008
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Gates, R., S. Yezerinac, R. Lanctot, A. Powell, P. Tomkovich, and O. Valchuk. 2011. Differentiating sex and subspecies of Beringia Dunlin using morphometrics. 4th Western Hemisphere Shorebird Group Meeting, Vancouver, B.C.
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August 2011
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Gates, H. R., Lanctot, R. B., and A. N. Powell. 2010. Replacement clutch laying in an arctic-breeding shorebird in response to experimental removal. COS/AOU/SCO Joint Annual Meeting, San Diego, CA.
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February 2010
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Fraley, Kevin M., Falke, Jeffrey A., McIntosh, Angus R. 2017. Management and community ecology of trophy freshwater salmonids in New Zealand and Alaska: correlations and contrasts. 50th Anniversary Symposium of the Fisheries Society of the British Isles. July 3-7 2017. Exeter, UK.
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July 2017
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Sport fisheries for trophy freshwater salmonids, particularly rainbow trout and brown trout, are important multi-million USD industries in the tourism-driven economies of the South Island, New Zealand and Alaska, United States. Consequently, management of these fisheries is often a balancing act between conserving population health of the target species and promoting utilization by anglers.
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Fraley, K.M., and J.A. Falke. 2014. Seasonal movements of Rainbow Trout (Oncorhynchus mykiss) in the Susitna River Basin, Southcentral Alaska. Alaska Chapter American Fisheries Society Annual Meeting, Juneau, Alaska, 21-24 October 2014.
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October 2014
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Anthropogenic development and climate change threaten fishes and their habitats, even in relatively pristine watersheds such as those in Alaska thus a better understanding of seasonal movements across multiple spatial scales will assist managers in monitoring, protecting, and rehabilitating native fish populations. Results of this work could be applied to trout populations found in similar drainages in Alaska to identify critical habitats and movement corridors, which will be useful for priori
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Fraley, K.M., Falke, J.A., Yanusz, R. and S. Ivey. 2015. Seasonal movements of Rainbow Trout (Oncorhynchus mykiss) in the Susitna River Basin, Southcentral Alaska. American Fisheries Society Annual Meeting, Portland, OR. 17-20 August 2015.
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August 2015
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Anthropogenic development and climate change threaten fishes and their habitats, even in relatively pristine watersheds such as those in Alaska thus a better understanding of seasonal movements across multiple spatial scales will assist managers in monitoring, protecting, and rehabilitating native fish populations. Results of this work could be applied to trout populations found in similar drainages in Alaska to identify critical habitats and movement corridors, which will be useful for priori
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Fraley, K. M., Lunde, M. J., Bailey, L. T., Falke, J. A., and A. D. Gryska. 2013. Bioelectrical impedance analysis as a measure of energy density in arctic grayling (Thymallus arcticus). Alaska Chapter American Fisheries Society Annual Meeting, Fairbanks, AK, 7-11 October 2013.
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October 2013
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This study will develop bioelectrical impedance analysis models for arctic grayling. Once parameterized these models will allow biologists to estimate condition in this species non-lethally.
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Fitzgerald, K., R. Bellmore, J. Fellman, C. Delbecq, and J. Falke. 2023. Stream hydrology and a salmon pulse subsidy shape juvenile salmonid foraging patterns in a southeast Alaska watershed. Meeting of the Alaska Chapter of the American Fisheries Society. 27 – 31 March, 2023, Fairbanks, AK, USA.
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March 2023
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Consumers capacity to exploit pulse subsidy resources may be influenced by antecedent environmental conditions such as stream flow. For juveniles of two salmonid species, we observed that consumption optima coincided with baseflow and high flow conditions, minima were observed during severe low-water and intermediate flow values, and interannual hydrologic variation shifted growth trajectories among years, potentially impacting access to pulse subsidies.
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Fitzgerald, K., Delbecq, C., Fellman, J., Bellmore, R., and J. Falke. 2022. Understanding Impacts of Hydrologic Variability on Juvenile Salmon Growth in SE AK Watersheds. American Fisheries Society Annual Meeting. 21- 25 August, 2022, Spokane, WA, USA.
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August 2022
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Climate change is altering hydrologic regimes in watersheds of Southeast Alaska, which together support one of the most productive salmon populations on Earth, and it is expected that these coastal drainages will experience more severe low water events interspersed with larger, more frequent high flows. Our results will help parse out complex relationships among stream flows, prey fluxes, and fish growth, thus improving understanding of how shifting flow regimes may impact salmon productivity.
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Fitzgerald, K., Delbecq, C., Fellman, J., Bellmore, R., and J. Falke. 2021. Understanding Impacts of Hydrologic Variability on Juvenile Salmon Growth in The Coastal Gulf of Alaska. Joint Aquatic Sciences Meeting 2022. 14 – 20 May, 2022, Grand Rapids, MI, USA.
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May 2022
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Climate change is altering hydrologic regimes in Gulf of Alaska watersheds and it is expected that these coastal drainages will experience more severe low water events interspersed with larger, more frequent high flows. Our results will help parse out complex relationships among stream flows, prey fluxes, and fish growth, thus helping understand how shifting flow regimes may impact salmon productivity in the region.
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Fitzgerald, K., Delbecq, C., Fellman, J., Bellmore, R., and J. Falke. 2021. Understanding Impacts of Hydrologic Variability on Juvenile Salmon Growth in The Coastal Gulf of Alaska. Alaska Chapter American Fisheries Society Annual Meeting [Virtual], 28 February -4 March 2022.
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February 2022
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Climate change is altering hydrologic regimes in Gulf of Alaska watersheds and it is expected that these coastal drainages will experience more severe low water events interspersed with larger, more frequent high flows. Our results will help parse out complex relationships among stream flows, prey fluxes, and fish growth, thus helping understand how shifting flow regimes may impact salmon productivity in the region.
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Fitzgerald, K., Delbecq, C., Fellman, J., Bellmore, R., and J. Falke. 2021. Understanding Impacts of Hydrologic Variability on Juvenile Salmon Growth for a Shifting Climate in Southeast Alaska. Ocean Sciences Meeting 2022. 27 February – 4 March, 2022, Honolulu, HI, USA.
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February 2022
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The goal of this research is to investigate how hydrologic patterns influence material fluxes, and in turn, the proportion of juvenile coho salmon and dolly varden growth attributed to periods of high and low flow. Our findings will help parse out complex relationships among stream flows, material fluxes, and fish growth, thus improving our understanding of how shifting flow regimes may impact salmon productivity in the region.
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Fitzgerald, K., Delbecq, C., Fellman, J., Bellmore, R., and J. Falke. 2021. Implications of a changing flow paradigm on juvenile salmon growth in Southeast Alaska. American Fisheries Society Annual Meeting, Baltimore, MD. 6-10 November, 2021.
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November 2021
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Climate change is altering hydrologic regimes of coastal watersheds that drain into the Gulf of Alaska (GOA), and it is expected that these coastal drainages will experience more dramatic low water events, interspersed with larger and potentially more frequent high flow events. Our research will help parse out the complex relationship between streamflow patterns and juvenile salmon growth, and improve our understanding of the impacts of climate change on salmon productivity in GOA drainages.
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Fitzgerald, K., Delbecq, C., Fellman, J., Bellmore, R., and J. Falke. 2021. Implications of a changing flow paradigm on juvenile salmon growth in Southeast Alaska. Alaska Chapter American Fisheries Society Annual Meeting [virtual]. 23-25 March, 2021.
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March 2021
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Climate change is altering hydrologic regimes in the Gulf of Alaska (GOA) region. It is expected that coastal drainages will experience more dramatic low water events interspersed with larger and potentially more frequent high flows. Results of this research will help parse out the complex relationships among stream flows, material fluxes, and juvenile salmon growth, with an ultimate goal to aid future research and management actions and navigate climate change impacts in important GOA drainage
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Fellman, J., Bellmore, R., Falke, J., Weigner, T., and S. Colbert. 2022. An Integrated Framework to Understand Linkages Across Icefield-To-Ocean and Ridge-To-Reef Ecosystems. Ocean Sciences Meeting 2022. 27 February – 4 March, 2022, Honolulu, HI, USA.
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February 2022
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Nearshore marine ecosystems in Southeast Alaska and Hawai'i are thought to rely heavily on organic matter and nutrients (i.e., materials) delivered by rivers, and declining food resources associated with altered icefield-to-ocean and ridge-to-reef linkages or the looming threats of climate and/or land use change on these food resources have led to an increased interest in the management of watersheds and their linked coastal ecosystems. This integrative framework would allow for sustainable man
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Farquharson, L.M., G. Grosse, V.E. Romanovksy, B.M. Jones, C.D. Arp, and A.D. McGuire. 2013. Spatial distribution of thermokarst landforms across arctic Alaska. Meeting of the American Geophysical Union, San Francisco, California.
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December 2013
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We conducted thermokarst landform mapping and spatial and morphometric analyses using high-resolution aerial photography, an interferometric synthetic aperture radar derived digital elevation model (IfSAR DEM), and hydrographic layers from the National Land Cover Database derived from Landsat-7. Our preliminary data show that thermokarst landform distribution, the extent of thermokarst activity and the depth of maximum subsidence vary across Arctic Alaska and that surficial geology is an import
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Fan, Z., A.D. McGuire, J.W. Harden, and M.R. Turetsky. December 2011. Modeling the production and transport of methane in an Alaska rich fen peatland. Fall Meeting of the American Geophysical Union, San Francisco, CA.
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December 2011
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Falke, J.A., and L.T. Bailey. 2015. Development and calibration of bioelectric impedance analysis as a measure of energetic status of Arctic grayling (Thymallus arcticus). American Fisheries Society Annual Meeting, Portland, OR. 17-20 August 2015.
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August 2015
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This study used bioelectrical impedance analysis (BIA) to characterize the energetic status of Arctic grayling (Thymallus arcticus), and provide researchers a non-lethal method of accurately assessing condition. The BIA approach shows promise as a rapid, precise, and non-lethal measurement of energy density.
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Falke, J.A., Torgersen, C.E., and J.K. Walter. 2013. Predicting the distribution of fish in headwaters: a test of the efficacy of spatial stream network models in capturing fish abundance variability across multiple spatial scales. 23rd Annual Conference of The International Environmetrics Society, Anchorage, AK, 10-14 June 2013.
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June 2013
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This study tests the efficacy of spatial stream network models for predicting fish abundance in headwater streams. The results will be useful for managers to identify biological hotspots and improve survey designs.
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Falke, J.A., Sergeant, C.J., and J.R. Bellmore. 2020. Ecological drought and implications for salmon and riverine habitats in Alaska. Alaska Chapter American Fisheries Society Annual Meeting. Fairbanks, Alaska, 23-26 March, 2020.
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March 2020
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Ecological drought is defined as significant episodic shortages of water availability that can influence individual ecosystem services (such as salmon productivity), shift overall ecosystem states, and trigger socio-ecological feedbacks. Information on drought impacts could be used toward development of an integrated drought monitoring framework and vulnerability assessment for Alaska riverscapes, with application toward prediction of drought impacts under future climate conditions.
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Falke, J.A., Sergeant, C.J., Bellmore, J.R., and R.A. Bellmore. 2020. Ecological drought and implications for salmon and riverine habitats in Southeast Alaska. ASLO-SFS Joint Summer Meeting, Madison, Wisconsin, 7-12 June, 2020.
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June 2020
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Ecological drought is defined as significant episodic shortages of water availability that can influence individual ecosystem services (such as salmon productivity) and shift overall ecosystem states. Here we, 1) synthesize and place in context recent drought conditions across Southeast Alaska, 2) quantify the hydrologic effects of recent drought on river flow regimes, and 3) use a recently-developed community life cycle model with a user-friendly interface to investigate the impacts of drought
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Falke, J.A., Perkin, J.S., Gido, K.B., Crockett, H.J., Sanderson, J.S., Johnson, E.R., and K.D. Fausch. Groundwater depletion in Western Great Plains projected to dry 250 stream-km of fish habitat in the next 45 years. American Fisheries Society Annual Meeting, Portland, OR. 17-20. August 2015.
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August 2015
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Across the western Great Plains of North America, groundwater pumping for irrigated agriculture has depleted regional aquifers that sustain surface flow for native fishes.We synthesize the ecological consequences of past and expected future changes in surface flow using existing fish assemblage data collected from across the region.
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Falke, J.A., Perkin, J.S., Gido, K.B., Crockett, H.J., Sanderson, J.S., Johnson, E.R., and K.D. Fausch. 2021. Groundwater declines are linked to changes in Great Plains stream fish assemblages. Western Division American Fisheries Society Annual Meeting [Virtual]. 11-13 May, 2021.
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May 2021
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Across the western Great Plains of North America, groundwater pumping for irrigated agriculture has depleted regional aquifers that sustain surface flow for native fishes. We synthesize the ecological consequences of past and expected future changes in surface flow using existing fish assemblage data collected from across the region, and provide an update on the current status of groundwater management for stream fish habitat in the Great Plains.
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Falke, J.A., Martin, A. N., and B. M. Huntsman. 2014. Chena River basin juvenile Chinook salmon and physical habitat studies (2013-2016). Yukon Basin Interagency Fisheries Meeting. April 18, 2014. Fairbanks, AK.
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April 2014
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A summary of ongoing and future work in my lab on juvenile Chinook salmon habitat and ecology in the Chena River basin, interior Alaska.
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Falke, J.A., Huntsman, B.M., and E.R. Schoen. 2018. Growth potential of juvenile Chinook Salmon (Oncorhynchus tshawytscha) across a boreal riverscape. American Fisheries Society Annual Meeting, Atlantic City, New Jersey, August 20-24, 2018.
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August 2018
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Recent downturns in Chinook salmon returns across Alaska have led to strong interest in how climate variability and anthropogenic pressures influence freshwater rearing conditions of this important species. A riverscape-scale perspective of how freshwater growth conditions are mediated by climate will be critical for conservation and management of Alaskan Chinook salmon stocks under a warmer and more variable climate.
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Falke, J.A., Huntsman, B.M., and A.N. Martin. 2016. The Role of Geomorphic and Hydrologic Processes in Structuring Spawning and Rearing Habitats for Chinook Salmon in a Boreal Stream Network. American Fisheries Society Annual Meeting, Kansas City, MO, 22-26 August 2016.
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August 2016
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For our recent work in the Chena River basin, interior Alaska, we used field-based investigations and a suite spatially-explicit models to assess Chinook Salmon spawning and rearing habitat quality and dynamics. Knowledge of the distribution, amount, and relative importance of habitat features within freshwater networks gained by studies such as ours will be critical for conservation and management of Alaskan Chinook Salmon stocks under a warmer and more variable climate.
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Falke, J.A., Huntsman, B.M., Schoen, E.R., and K.E. Bennett. 2016. Growth potential of juvenile Chinook Salmon (Oncorhynchus tshawytscha) across a boreal riverscape. Alaska Chapter of the American Fisheries Society Annual Meeting, Fairbanks, AK, 20-24 March 2017.
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March 2017
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We used field-based investigations and spatially-explicit flow and stream temperature models to assess juvenile Chinook Salmon growth potential across the Chena River basin, Alaska. We found that climate variability is clearly an important driver of freshwater habitat conditions, and has a large role in controlling freshwater growth of juvenile salmon in this system.
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Falke, J.A., Flitcroft, R.M., Dunham, J.B., McNyset, K.M., Hessburg, P.H., and G.H. Reeves. 2014. Climate change and vulnerability of bull trout in a fire-prone landscape. 144th Annual Meeting, American Fisheries Society, Quebec City, Quebec, Canada, 17-21 August 2014.
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August 2014
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We used a Bayesian network (BN) approach to evaluate population vulnerability of bull trout (Salvelinus confluentus) in the Wenatchee River basin, Washington, USA under current and future climate and fire scenarios. We found that bull trout population vulnerability depended on the extent to which climate effects can be offset by management, how other factors such as habitat connectivity and fire size can be managed or mitigated, and the magnitude of climate change itself and that local manageme
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Falke, J.A., Flitcroft, R.L., Dunham, J.B., McNyset, K.M., Hessburg, P.F., and G.H. Reeves. 2014. Fish, forests, and fire: vulnerability analysis for threatened salmonids under a changing climate. Alaska Chapter American Fisheries Society Annual Meeting, Juneau, Alaska, 21-24 October 2014.
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October 2014
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Linked atmospheric and wildfire changes will complicate future management of native coldwater fishes in fire-prone landscapes and new approaches to management that incorporate uncertainty are needed to address this challenge. Overall, our Bayesian network offered a powerful approach to identify areas where forest management has the greatest potential to effect population-scale resilience of threatened salmonids in fire-prone ecosystems.
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Falke, J.A., Dunham, J.B., Hockman-Wert, D., and R. Pahl. 2014. Integrating models of species distributions, physiological thresholds, and physical potential to diagnose temperature impairment in Great Basin streams. Joint Aquatic Sciences Meeting, Portland, OR, 19-23 May 2014.
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May 2014
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This study provides a framework for evaluating thermal impairment of streams for coldwater fishes based on a weight of evidence approach. The results will assist managers and planners to diagnose impairment efficiently across broad, heterogeneous stream networks.
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Falke, J.A., Cathcart, C.N., Fox, J., Henzsey, R., and K. Lininger. 2019. Longitudinal patterns of logjams and occupancy by juvenile Chinook Salmon along a sub-Arctic boreal riverscape. American Fisheries Society Annual Meeting, Reno, Nevada, 29 September – 3 October, 2019.
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September 2019
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Large in-stream wood accumulations (i.e., logjams) are thought to provide critical rearing and refuge habitat for juvenile Chinook Salmon in sub-Arctic boreal rivers. However, the distribution and abundance of logjams along the riverscape and relationships between logjam characteristics and habitat use are poorly understood.
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Falke, J.A., Benda, L., and F. J. Adams. 2013. Chena River basin landscape-scale freshwater physical habitat studies. Alaska Chapter American Fisheries Society Annual Meeting, Fairbanks, AK, 7-11 October 2013.
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October 2013
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A poster to highlight upcoming digital landscape and thermal regime modeling to be conducted in the Chena River basin, AK. Results of the study will assist managers with evaluating salmon habitat quality.
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Falke, J.A. 2022. The Fifth National Climate Assessment: Opportunities for participation and engagement by the Alaska fisheries community. Alaska Chapter American Fisheries Society Annual Meeting [Virtual], 28 February -4 March 2022.
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February 2022
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The Fifth National Climate Assessment (NCA5), currently in development, will assess the science of climate change and its impacts across the United States and document climate change-related impacts and responses for various sectors and regions, with the goal of better informing public and private decision-making at all levels. I will highlight opportunities and resources for the Alaska fisheries community to engage with and provide input to the NCA5 Alaska Chapter.
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Falke, J.A. 2021. Bayesian networks to assess vulnerability of salmonids to climate change and wildfire in Washington and Alaska. Association for Fire Ecology 9th International Fire and Ecology Congress. 30 Nov – 4 Dec 2021 [Virtual].
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November 2021
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A useful approach to evaluate climate and fire scenarios in the face of incomplete information are Bayesian networks (BNs), decision-tools that allow for integration of disparate information sources and prediction of outcomes based on multiple scenarios. Our results will improve our ability to manage future fire and climate driven effects at the terrestrial-aquatic interface, serve as a template for management in other ecoregions, and identify habitat critical for the conservation of important
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Falke, J., Sparks, M., Torvinen, E., and P. Westley. 2017. Climate vulnerability and salmonids in Alaska: hind- and forecasting freshwater growth and phenology across species and habitats. Western Division American Fisheries Society Annual Meeting, Missoula, Montana, 23-25 May, 2017.
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May 2017
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We present a synthesis of three recent studies that hind- and forecast salmonid population responses across a broad range of climate and habitat conditions in Alaska. The complexity of responses we observed to climate variability and change highlights the importance of incorporating life-stage- |