Cooperative Fish and Wildlife Research Units Program:
Education, Research and Technical Assistance for Managing Our Natural Resources

Staff Member

Allyson Yarra

Master's
Email: ayarra@usgs.gov

Education

  • MS University of Arkansas 2017
  • BS University of Massachusetts Amherst 2015
Research Publications Publication Date
Yarra, A.N. and D.D. Magoulick. 2020. Effect of stream permanence on predation risk of lotic crayfish by riparian predators. Southeastern Naturalist 19:673-691. doi.org/10.1656/058.019.0407 November 2020
Yarra, A.N. and D.D. Magoulick. 2019. Modeling effects of invasive species and drought on crayfish extinction risk and population dynamics. Aquatic Conservation: Marine and Freshwater Ecosystems 29:1-11. DOI:10.1002/aqc.2982 January 2019
Yarra, A.N. and D.D. Magoulick. 2018. Stream permanence is related to crayfish occupancy and abundance in the Ozark Highlands, USA. Freshwater Science 37:54–63. DOI:10.1086/696020 March 2018
Project Completion Date
Investigating Impacts of Winter Lake Drawdowns on Littoral Ecosystems December 2019
Impacts of Surface Water Supply Reservoirs on Stream Flow and Biota June 2024
Integrating spatial data for predicting the influence of altered hydrologic and thermal conditions on fish assemblage traits and taxa across stream flow regimes June 2025
Presentations Presentation Date
Yarra, A.N., T.A. Richards, and A.H. Roy. 2015. Impacts of thermal and flow alteration on benthic stream macroinvertebrates downstream of water supply reservoirs. Annual Meeting of the Society for Freshwater Science, 17-21 May 2015, Milwaukee, WI. May 2015
Yarra, A.N., T.A. Richards, and A.H. Roy. 2015. Impacts of thermal and flow alteration on benthic stream macroinvertebrates downstream of surface water reservoirs in Massachusetts. New England Association of Environmental Biologists, 18-20 March 2015, Bartlett, NH. March 2015
Yarra, A.N., T.A. Richards, and A.H. Roy. 2014. Assessing effects of surface water supply reservoirs on stream hydrologic and thermal regimes in Massachusetts. Annual Meeting of the New England Association of Environmental Biologists, 26-28 March 2014, Burlington, VT. March 2014
Yarra, A.N., L.A. Bruckerhoff and D.D. Magoulick. 2016. Influence of flow regime, geomorphology and habitat on crayfish assemblages of the Ozark Highlands. Society for Freshwater Science, Sacramento, California. May 2016
Yarra, A.N., L.A. Bruckerhoff and D.D. Magoulick. 2015. Crayfish occupancy in response to hydrologic regime and geomorphology in Ozark streams. Symposium on Conservation, Ecology, and Taxonomy of Southeastern Crayfish, Southern Division American Fisheries Society, Savannah, Georgia. January 2015
Stein, B., A.N. Yarra and D.D. Magoulick. 2015. The importance of substrate size for crayfish in intermittent and groundwater streams. Arkansas Water Resources Center conference, Fayetteville, Arkansas. June 2015
Roy, A.H., T.A. Richards, C.R. Smith, and A.N. Yarra. 2015. Investigating impacts of impoundments on the hydrology, temperature, and fish assemblages in Massachusetts streams. New England Association of Environmental Biologists, 18-20 March 2015, Bartlett, NH. March 2015
Magoulick, D.D., J.T. Fox, A. Yarra, R. Fournier, L. Bayer. 2024. Environmental thresholds and other approaches for aquatic conservation. U.S. Fish and Wildlife Service and U.S. Geological Survey Coop Unit Liaisons meeting. June 2024
Magoulick, D.D. and A.N. Yarra. 2017. Effect of stream permanence on predation risk of lotic crayfish by riparian and aquatic predators. Symposium on Challenges, insights and opportunities in crayfish conservation and ecology, Society for Freshwater Science, Raleigh, North Carolina. June 2017
Role and Organization Individual         Start Date        End Date       
American Fisheries Society - Chapter President Yarra August 2015 Present