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

California Staff Member


Dr. Margaret Wilzbach

Margaret Wilzbach

Unit Leader
Phone: (707) 826 - 5645
Email: wilzbach@humboldt.edu
Personal website

Education

  • Ph D Oregon State University, Corvallis 1985
  • MS University of Illinois, Champaign 1978
  • BS University of Illinois, Champaign 1976

Biography

Dr. Margaret Wilzbach served as Assistant Unit Leader since 1999. She assumed the position of Unit Leader in March 2014.

Teaching Interest

Ecology of running waters; ecology and behavior of salmonid fishes.

Research Interest

Ecology and conservation of salmonid fishes, fish/invertebrate interactions, stream ecology.

Research Publications Publication Date
Wilzbach,M., M.J. Ashenfelter, S.J. Ricker. 2012. Movement of Resident Rainbow Trout Transplanted below a Barrier to Anadromy. Transactions of the American Fisheries Society. 141:2, 294-304. | Abstract | Download | Publisher Website 2012-03-31
Wilzbach, P., and K. W. Cummins. 2000. Profitable stream positions differ for brook trout and cutthroat trout. Pg. 265-266 in Wild Trout VII. Management in the New Millenium: are we ready? 2000-10-31
Wilzbach, M. A., K. W. Cummins, T. K. Barnes, and J. C. Trexler. 2002. Channel-floodplain coupling in the Kissimmee River, Florida (USA): invertebrate movement and fish feeding. Vereinigung fur theoretische und angewandte Limnologie, Verhandlungen. 28: 164-172. 2002-02-28
Wilzbach, M. A., K. W. Cummins, L. M. Rojas, P. J. Rudershausen, and J. Locascio. 1999. Establishing baseline seagrass parameters in a small estuarine bay. Pg. 125-135 in S. A. Bortone (ed. ), Seagrasses: monitoring ecology, physiology, and management. CRC Press, Boca Raton. 1999-01-31
Wilzbach, M. A., B. C. Harvey, J. L. White, and R. J. Nakamoto. 2005. Effects of riparian canopy opening and salmon carcass addition on the abundance and growth of resident salmonids. Canadian Journal of Fisheries and Aquatic Sciences 62: 58-67. 2005-03-31
Wilzbach, M. 2001. Review of "Wildstream: a natural history of the free flowing river". Fisheries 28(8):43. 2001-03-31
Wilzbach M. A., and K. W. Cummins. Rivers and Streams: Physical Setting and Adapted Biota. In Sven Erik Jorgensen and Brian D. Fath (Editor-in-Chief), Ecosystems. Vol. [4] of Encyclopedia of Ecology, 5 vols. pp. [3095-3106] Oxford: Elsevier. 2008-06-30
Mull, K. E., and M. A. Wilzbach. Selection of spawning sites by coho salmon in a northern California stream. North American Journal of Fisheries Management 27:1343-1354. 2007-11-30
Malakauskas, D. M., and M. Wilzbach. 2012. Invertebrate assemblages in the lower Klamath River, with reference to Manayunkia speciosa. California Fish and Game 98(4):214-235; 2012. | Abstract | Download 2012-12-31
Malakauskas, D. M., Willson, S. J., M. A. Wilzbach, and N. A. Som. 2013. Flow variation and substrate type affect dislodgement of the freshwater polychaete, Manayunkia speciosa. Freshwater Science 2013, 32(3):862-873 | Download 2013-06-30
Madej, M. A., M. A. Wilzbach, K. W. Cummins, C. Ellis, and S. Hadden. 2002. The contribution of suspended organic sediments to turbidity and sediment flux. Proceedings, 8th Federal Interagency Sedimentation Conference. April 2002, Reno, Nevada. 2002-10-31
K W Cummins and M A Wilzbach. Rivers and Streams: Ecosystem Dynamics and Integrating Paradigms. In Sven Erik Jorgensen and Brian D. Fath (Editor-in-Chief), Ecosystems. Vol. [4] of Encyclopedia of Ecology, 5 vols. pp. [3084-3095] Oxford: Elsevier. 2008-06-30
Hodge, B.W., M.A. Wilzbach, W.G. Duffy, R.M. Quiñones, and J.A. Hobbs. Life history diversity in Klamath River steelhead. Transactions of the American Fisheries Society 145:227-238, 2016. | Download 2016-02-28
Hodge, B., M.A. Wilzbach, and W.D. Duffy. 2013. Potential fitness benefits of the half-pounder life history in Klamath River steelhead. Transactions of the American Fisheries Society, 2014. 143:864-875, 2014. | Abstract | Download 2014-06-30
Frazey, S. L., and M. A. Wilzbach. The relationship between productivities of salmonids and forest stands in northern California watersheds. Western Journal of Applied Forestry. 22 (2) 2007:73-80. 2007-04-30
Cummins, K., M. Wilzbach, R. Merritt, and J. Brock. 1999. Evaluation of the restoration of the Kissimmee River in South Florida. In Hamilton, S. W., and D. S. White (eds). 1999. The natural history of the lower Tennessee and Cumberland River valleys. Austin Peay State University Press, Clarksville, TN. 1999-01-31
Cummins, K. W., and M. A. Wilzbach. 2005. The inadequacy of the fish-bearing criterion for stream management. Aquat. Sci. 67:486-491 2005-09-30
Ambrose, H. E., M. A. Wilzbach, and K. W. Cummins. 2004. Periphyton response to increased light and salmon carcass introduction in northern California streams. Journal of the North American Benthological Society, 23: 701-712 2004-11-30
Project Completion Date
Klamath Basin S3 Model 2019-09-30
Eel River Monitoring 2015-07-30
Shasta River Coho 2014-04-01
Establish & Operated Cooperative Fish & Wildlife Research 2017-03-30
Prairie Creek Fisheries and Aquatic Ecosystem Synthesis 2015-09-30
Phase II: Monitoring the endangered Tidewater Goby using environmental DNA in water samples: Field tests 2019-06-30
Redwood Creek Life Cycle Monitoring - DIDSON 2015-03-31
Upper and Lower Redwood Creek Juvenile Salmon (Smolt) Abundance Project 2017-03-31
Prairie Creek Juvenile Salmonid (Smolt) Abundance Project 2017-03-31
Genetic Analysis of Tidewater Goby Tissue Samples 2014-05-31
Salmon in the Redwood Creek Basin 2016-03-31
Monitoring the endangered Tidewater Goby using water samples 2013-12-30
Disease Reduction in Klamath River Salmon 2012-12-31
The Role of Barriers in the Conservation of McCloud Redband Trout 2011-08-21
Polychaete Laboratory Work 2011-05-30
Production of myxospores of Ceratomyxa shasta in Chinook salmon carcasses 2011-09-30
Myxozoan Fish Disease Research and Monitoring 2012-12-31
Basal Hollow Roost Selection 2019-06-30
Prairie Creek Coho Salmon Life Cycle Monitoring 2020-03-31
Monitoring threatened Coho Salmon populations in Humboldt Bay tributaries 2020-09-30
Monitoring Chinook Salmon in Redwood Creek to assess the impacts of a modified estuary 2020-06-30
Characterizing the foraging ecology of marbled murrelets in coastal waters adjacent to old growth redwoods 2018-06-30
Rangewide Giant Kangaroo Rat Surveys & Monitoring Optimization 2018-12-31
Giant Kangaroo Rat Population Monitoring in Panoche Valley 2016-06-30
Tidewater Goby Survey 2018-09-30
Habitat selection in an Arctic Seabird: Implications for Climate Change 2019-12-31
Townsend's Big-Eared Bat Statewide Assessment 2017-12-31
Redwood Creek Life Cycle Monitoring DIDSON 2015-2017 2017-03-01
Export of Invertebrate Drift From Headwater Streams 2018-06-30
Presentations Presentation Date
Wilzbach, M.A. and B.W. Hodge. 2015. Life history variation in Klamath River steelhead. 2015-08-17
Wilzbach, M.A. 2016. Fisheries and Aquatic Resources of Prairie Creek. Prairie Creek Technical Advisory Committee for Redwood National Park. Orick, California. April 5, 2016. 2016-04-05
Wilzbach, M.A. 2015. Role and source of macroinvertebrates in fish growth. Riparian Summit Conference. Korbel, California. 29-30 August 2015. 2015-04-29
Rizza, S., A.P. Kinziger, J.C. Garza, and M.A. Wilzbach. 2015. Asymmetric introgression between Coastal Cutthroat Trout and steelhead in the Smith River Basin, California. 145th Annual Meeting of the American Fisheries Society. Portland, Oregon. August 16-20, 2015. 2015-08-19
Hollis, J. and M.A. Wilzbach. 2016. Export of invertebrate drift from fishless headwater streams of the lower Klamath River Basin, California, and its use by trout. Annual Meeting, Society for Freshwater Science. Sacramento, California. May 21-26, 2016. 2016-05-24
Hollis, J. and M. A. Wilzbach. 2016. Export of invertebrate drift from fishless headwater streams in the lower Klamath River Basin, California, and its use by trout. Coast Redwood Forest Symposium, Eureka, California. 2016-09-13
Dockham, A., M.A. Wilzbach, and G. Horton. 2015. Comparison of benthic invertebrate community structure and diet composition of steelhead trout in Dry Creek, California. 33rd Annual Meeting Salmonid Restoration Federation. Santa Rosa, California. Mar 11-14, 2015. 2015-03-14
Dockham, A. and M.A. Wilzbach. 2014. Comparison of benthic invertebrate community structure and diet composition of steelhead trout (Oncorhynchus mykiss) in Dry Creek, California. 1st Ann. Meeting California Chapter Society of Freshwater Science. 2014-11-19
Chen E. K., Henderson M.J. 2018 Contribution of juvenile estuarine residency to Chinook Salmon recruitment in Redwood Creek, California. Oregon Chapter of the American Fisheries Society 54nd Annual Meeting, Eugene, OR. March 13-16, 2018. 2018-03-14
Chen E. K., Henderson M.J. 2018 Contribution of juvenile estuarine residency to Chinook Salmon recruitment in Redwood Creek, California. Cal-Neva Chapter of the American Fisheries Society 52nd Annual Meeting, San Luis Obispo, CA. Feb 28-March 2, 2018. 2018-03-01
Technical Publications Publication Date
Wilzbach. M.A. 2016. State of the fisheries and aquatic resources of Prairie Creek. Final Report to Redwood National and State Park, Cooperative Agreement P13AC00848. | Download 2016-01-31
Wilzbach, P., D.M. Malakauskas, S.J. Willson. 2013. Myxozoan Fish Disease Research and Monitoring, Final Project Report. National Fish and Wildlife Foundation. | Download 2013-01-31
Wilzbach, P. 2008. Movement of resident trout transplanted below a barrier to anadromy. IN Summary of the Eleventh annual Pacific coast Steelhead Management Meeting. http://www.psmfc.org/steelhead2008. 2008-01-31
Wilzbach, M.A., M.D. Sparkman, P.Y. Drobny, M.E. Gordon, and C.M.G. Boone. 2016. Prairie Creek Monitoring Project, 2015 Season: a report to the Fisheries Restoration Grants Program Project P1210321. 98 pg. | Download 2016-02-28
Wilzbach, M. A. 2005. Using riparian canopy opening and salmon carcass addition to increase salmonid growth. Western Forester, Society of American Foresters 50(2):6-7. 2005-03-31
Sparkman, M.D., R. Park, L. Osborn, and M.A.Wilzbach. 2016. Lower Redwood Creek juvenile salmonid (smolt) abundance project, study year 2015: a report to the Fisheries Restoration Grants Program, Project No. P1210322. 85 pp. | Download 2016-01-31
Moore, T.L. and M.A. Wilzbach. 2016. Distribution and relative abundance of juvenile Coho Salmon in the Redwood Creek Basin, Humboldt County, California. Final report to the California Department of Fish and wildlife Fisheries Restoration Grant Program, Project P1210320. | Download 2016-03-31
Hendrickson, G.L., N.E. Campise 2013. Production of Myxospores of Ceratomyxa shasta in Chinook Salmon Carcasses, Final Project Report, Oregon State University. | Download 2013-02-28
Duffy, W. G., M. A. Wilzbach, M. Wheeler and S. Frazey. 2003. Watershed restoration validation monitoring protocols for California. California Department of Fish and Game, Sacramento. 2003-02-28
Duffy, W. G. and M. A. Wilzbach. 2004. A standard weight equation for juvenile coho salmon. California Department of Fish and Game, Sacramento. 2004-07-31