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College of Natural Resources

Physical Address:
975 W. 6th Street
Moscow, Idaho

Mailing Address:
875 Perimeter Drive MS 1138
Moscow, ID 83844-1138

Phone: 208-885-8981

Fax: 208-885-5534


Web: College of Natural Resources


Frank Wilhelm

Frank Wilhelm, Ph.D.

Professor of Limnology and Associate Director, Center for Research on Invasive Species


CNR 104D



Mailing Address

Department of Fish and Wildlife Sciences
University of Idaho
875 Perimeter Drive MS 1136
Moscow, ID 83844-1136


  • Ph.D., University of Alberta, Ecology and Environmental Science, 1999
  • M.S., Trent University, Watershed Ecosystems Graduate Program, 1994
  • B.S., Trent University, Biology/Environmental Resource Science, 1991

Research Interests

Lake management
Aquatic restoration
Food webs
Aquatic invertebrates
Non-native species

Seminal Publications

Harris, T. D., Wilhelm, F. M., Graham, J. L., and Loftin, K. A. 2014. Experimental manipulation of TN:TP ratios to suppress cyanobacterial biovolume and microcystin concentration in large scale in situ mesocosms. Lake and Reservoir Management. 30: 72-83. DOI:10.1080/10402381.2013.876131

Harris, T. D., Wilhelm, F. M., Graham, J. L., and Loftin, K. A. 2014. Experimental additions of aluminum sulphate and ammonium nitrate to large−scale in situ mesocosms to reduce cyanobacterial biovolume and microcystin concentration. Lake and Reservoir Management 30:84-93 DOI:10.1080/10402381.2013.876132

Recent Publications

Eitel, K., Wilhelm, F. M., Parsons, R., and Eitel, J. 2014. Lakes Alive. Science Scope 32: 22-29.

Wilhelm, F. M. 2013. Using service-learning to teach limnology. LakeLine 33: 34-39.

Sánchez-Murillo, R., Brooks, E. S., Sampson, L. Boll, J., and Wilhelm, F.M. 2013. Ecohydrological habitat quality and steelhead (Oncorhynchus mykiss) in an effluent dominated stream: potential benefits of waste water treatment plants in streams of the Pacific Northwest impoverished by loss of marine derived nutrients. Ecohydrology DOI: 10.1002/eco.1376.

Wilhelm, F. M., and Nelson, D. 2012. A non-lethal approach to estimate whole-body 13C and 15N stable isotope ratios of freshwater amphipods using walking legs. Invertebrate Biology. 131:110-118. DOI 10.111/j.1744-7410.2012.00259.x

Caldwell, T. J., and Wilhelm, F. M. 2011. The life history characteristics, growth and density of Mysis diluviana in Lake Pend Oreille, Idaho, USA. Journal of Great Lakes Research. 38: 58-67 Supplement 2. doi:10.1016/j/jglr.2011.07.010.

Nelson, D., and Wilhelm, F. M. 2011. Survival and growth of the stygophilic amphipod Gammarus troglophilus under laboratory conditions. Journal of Crustacean Biology 31: 424-433. DOI: 10.1651/10-3431.1

Wilhelm, F. M. 2009. Pollution of aquatic ecosystems I. In G. E. Likens, editor. Encyclopedia of Inland Waters. Volume 3, pp 110-119. Oxford: Elsevier.

Wilhelm, F. M. and Venarsky, M. P. 2009. Variation in gnathopod morphology of cave amphipods and its use in determination of sex. Journal of Crustacean Biology 29: 26-33.

Venarsky, M. P., Anderson, F. E. and Wilhelm, F. M. 2009. Population genetic study of the U.S. federally listed Illinois cave amphipod, Gammarus acherondytes. Conservation Genetics 10: 915-921. Published online 2008 DOI: 10.1007/s10592-008-9579-0

National Advising Association Faculty Advising Award 2015
Region 8 National Academic Advising Association Faculty Advisor Award of Merit 2015
University of Idaho Excellence in Advising Award. Awarded annually to outstanding UI faculty advisor. 2014.
College of Natural Sciences Outstanding faculty advisor. 2010.


Risks and effectiveness of benthic barriers as tools to eradicate infestation of Asian clams in the Ellisport Bay treatment area of Lake Pend Oreille, Idaho
Hope, ID
The goal of this research is to delimit the distribution of the non-native Asian clam in Lake Pend Oreille where they were discovered in 2012, and to examine if impermeable benthic barriers can be used to eliminate the infestation.

Willow Creek Reservoir Water Sampling in 2014 and determination of Internal Loading
Heppner, OR
The focus of this work is to sample bi-weekly water quality parameters throughout the growing season and examine the internal load of phosphorus that accumulates in the bottom waters from the sediments while the lake is thermally stratified. This internal loading will be tied to the whole lake nutrient budget to help understand the recurrence of toxic blooms of cyanobacteria that result in lake closures.

Experimental determination of the role of phosphorus on the growth of Didymosphenia geminata in the Kootenai River, Montana, downstream from Libby Dam
Libby, MT
The goal of this project is to determine potential management strategies that could be employed at the whole-river scale to reduce the occurrence of blooms of Didymo, a stalked diatom that displaces large invertebrates which serve as food for endangered fish species and trophy fisheries. We are using a mobile experimental flume facility with 32 flumes to experimentally determine the effectiveness of various treatment.

The juvenile steelhead food web in an effluent dominated stream, Troy, Idaho, determined using stable isotopes.
Troy, ID
The goal of this project is to understand the incorporation of nitrogen from the Troy wasterwater treatment plant in the foodweb of the West Fork of the Little Bear Creek which is one of the highest steelhead producing streams in the Potlatch River system.

Completed projects

Willow Creek Reservoir Water Sampling in 2013 and characterization of inflows from subwatersheds
Heppner, OR
The goal of this research was to sample water quality parameters in Willow Creek Reservoir during the 2013 growing season and to determine the sub-catchment contribution of sediment and phosphorus.

An examination of the spatial and temporal distribution and density of Mysis and zooplankton and implications for the survival of kokanee fry in Lake Pend Oreille
Sandpoint, ID
The goal of this research was to identify hotspots of mysids and zooplankton in Lake Pend Oreille to inform the stocking location and timing of hatchery-reared kokanee to increase their probability of survival. We also developed a method to identify prey suitable for various sized kokanee.

A rearing protocol for the Illinois cave amphipod, Gammarus acherondytes, to supports its recovery.
Waterloo, IL
We reared the federally endangered Illinois cave amphipod and surrogate species in the laboratory to establish under which conditions they would flourish and to develop a rearing protocol to establish robust laboratory populations.


Limnology of Fernan Lake / Adventure Learning workshop
Coeur d’Alene, ID
Led a workshop to teach middle school and high school teachers about limnology and opportunities to incorporate limnology into their curriculum
Jun 16, 2014.

Scientist in Residence, McCall Outdoor Sciences School
McCall, ID
Led approximately 65 sixth graders in exploration of lakes in winter by coring through the ice and taking water and biological samples.
Mar 18-21, 2014

Find out more about how to support my research and the Limnology Excellence Fund.

Contact Us

College of Natural Resources

Physical Address:
975 W. 6th Street
Moscow, Idaho

Mailing Address:
875 Perimeter Drive MS 1138
Moscow, ID 83844-1138

Phone: 208-885-8981

Fax: 208-885-5534


Web: College of Natural Resources