Jason B Dunham
I am a Supervisory Research Ecologist at the Forest and Rangeland Ecosystem Science Center in Corvallis, Oregon
My research is focused on landscape ecology of aquatic ecosystems, conservation biology of focal species, ecology of natural disturbance, biological invasions, and monitoring.
Professional Experience
2005 - Present: USGS, Forest and Rangeland Ecosystem Science Center, Supervisory Research Ecologist, Corvallis, Oregon
Education and Certifications
Ph.D. Ecology Evolution and Conservation Biology, University of Nevada, Reno, NV
Science and Products
Aquatic & Landscape Ecology Research Team (FRESC)
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What to do when invaders are out of control?
FLOwPER user guide—For collection of FLOw PERmanence field observations
Linkages between temperature, macroinvertebrates, and young-of-year Coho Salmon growth in surface-water and groundwater streams
Land-cover and climatic controls on water temperature, flow permanence, and fragmentation of Great Basin stream networks
Can nutrient additions facilitate recovery of Pacific salmon?
Thermal heterogeneity, migration, and consequences for spawning potential of female bull trout in a river-reservoir system
Modeling control of Common Carp (Cyprinus carpio) in a shallow lake–wetland system
Distribution and status of trout and char in North America
Decision analysis for the reintroduction of Bull Trout into the lower Pend Oreille River, Washington
Climate vulnerability assessment for Pacific salmon and steelhead in the California Current Large Marine Ecosystem
Application of multiple-population viability analysis to evaluate species recovery alternatives
Effects of a changing climate on the hydrological cycle in cold desert ecosystems of the Great Basin and Columbia Plateau
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
To request an interview, contact fresc_outreach@usgs.gov or call (541) 750-1030.
Science and Products
- Science
Aquatic & Landscape Ecology Research Team (FRESC)
Fresh waters are one of the most valuable and threatened resources worldwide. They supply critical services to society and harbor many of the world’s most imperiled species. We conduct research and provide technical assistance to address challenges to fresh waters. Our research focuses on ecological processes in freshwater and terrestrial systems and the effects of those processes on landscape...Filter Total Items: 17 - Data
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Filter Total Items: 16No Result Found - Multimedia
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
- Publications
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
Filter Total Items: 139What to do when invaders are out of control?
Biological invasions threaten species and ecosystems worldwide. Impacts from invasions are especially prevalent in freshwaters, where managers have struggled to contain the problem. Conventional approaches to managing invaders focus on prevention and control. In practice, these measures have proven to be variably effective. Control or eradication of established invaders is particularly difficult aAuthorsJason B. Dunham, Ivan Arismendi, Christina Murphy, Alex Koeberle, J Andres Olivos, James B Pearson, Francisco Pickens, David Roon, John R. StevensonFLOwPER user guide—For collection of FLOw PERmanence field observations
The accurate mapping of streams and their streamflow conditions in terms of presence or absence of surface water is important to both understanding physical, chemical, and biological processes in streams and to managing land, water, and ecological resources. This document describes a field form, FLOwPER (FLOw PERmanence), available within a mobile application (app), for standardized data collectioAuthorsKristin L. Jaeger, Jonathan Burnett, Emily D. Heaston, Steve M. Wondzell, Nathan Chelgren, Jason B. Dunham, Sherri Johnson, Mike BrownLinkages between temperature, macroinvertebrates, and young-of-year Coho Salmon growth in surface-water and groundwater streams
Ecological resources for fishes in stream food webs shift over space and time, providing a complex template of available resources that can be used for growth. We tracked water temperature in conjunction with young-of-year Coho Salmon size, growth, and diet in 2 streams with contrasting thermal regimes: a groundwater stream with colder temperatures and lower thermal variability all year and a surfAuthorsE. Y. Campbell, Jason B. Dunham, G H ReevesLand-cover and climatic controls on water temperature, flow permanence, and fragmentation of Great Basin stream networks
The seasonal and inter-annual variability of flow presence and water temperature within headwater streams of the Great Basin of the western United States limit the occurrence and distribution of coldwater fish and other aquatic species. To evaluate changes in flow presence and water temperature during seasonal dry periods, we developed spatial stream network (SSN) models from remotely sensed land-AuthorsAndrew S. Gendaszek, Jason B. Dunham, Christian E. Torgersen, David P Hockman-Wert, Michael Heck, Justin Martin Thorson, Jeffrey Michael Mintz, Todd AllaiCan nutrient additions facilitate recovery of Pacific salmon?
Multiple restoration actions have been implemented in response to declining salmon populations. Among these is the addition of salmon carcasses or artificial nutrients to mimic marine-derived nutrients historically provided by large spawning runs of salmon. A key assumption in this approach is that increased nutrients will catalyze salmon population growth. Although effects on aquatic ecosystems hAuthorsJoseph R. Benjamin, James R Bellmore, Emily Whitney, Jason B. DunhamThermal heterogeneity, migration, and consequences for spawning potential of female bull trout in a river-reservoir system
The likelihood that fish will initiate spawning, spawn successfully, or skip spawning in a given year is conditioned in part on availability of energy reserves. We evaluated the consequences of spatial heterogeneity in thermal conditions on the energy accumulation and spawning potential of migratory bull trout (Salvelinus confluentus) in a regulated river–reservoir system. Based on existing data,AuthorsJoseph R. Benjamin, Dmitri T Vidergar, Jason B. DunhamModeling control of Common Carp (Cyprinus carpio) in a shallow lake–wetland system
The introduction of Common Carp (Cyprinus carpio) into North American waterways has led to widespread alteration of aquatic ecosystems. Control of this invader has proven extremely difficult due to its capacity for rapid population growth. To help understand how Common Carp can potentially be controlled we developed a population dynamics model (CarpMOD) to explore the efficacy of active and passivAuthorsJames B Pearson, Jason B. Dunham, J Ryan Bellmore, Donald E. LyonsDistribution and status of trout and char in North America
No abstract available.AuthorsPhaedra Budy, Kevin B. Rogers, Yoichiro Kanno, Brooke E Penaluna, Nathaniel Hitt, Gary P. Thiede, Jason B. Dunham, Chad Mellison, William Somer, James DeRitoDecision analysis for the reintroduction of Bull Trout into the lower Pend Oreille River, Washington
The decision to reintroduce a species can be difficult owing to conflicting opinions and objectives, as well as uncertainty of the outcome. Structured decision making addresses these considerations by identifying realistic fundamental objectives and building achievable management alternatives, within a quantitative modeling framework. The process is driven by participation of stakeholders that repAuthorsJoseph R. Benjamin, William R. Brignon, Jason B. DunhamClimate vulnerability assessment for Pacific salmon and steelhead in the California Current Large Marine Ecosystem
Major ecological realignments are already occurring in response to climate change. To be successful, conservation strategies now need to account for geographical patterns in traits sensitive to climate change, as well as climate threats to species-level diversity. As part of an effort to provide such information, we conducted a climate vulnerability assessment that included all Pacific salmon anAuthorsLisa G Crozier, Michelle M McClure, Tim J. Beechie, Steven J. Bograd, David A. Boughton, Mark H. Carr, Thomas D. Cooney, Jason B. Dunham, Correigh M. Greene, Melissa A Haltuch, Elliott L. Hazen, Damon M Holzer, David D. Huff, Rachel C. Johnson, Chris E Jordan, Issac C Kaplan, Steven T Lindley, Nathan J Mantua, Peter B. Moyle, James M Myers, Mark W Nelson, Brian C Spence, Laurie A. Weitkamp, Thomas H. Williams, Ellen Willis-NortonApplication of multiple-population viability analysis to evaluate species recovery alternatives
Population viability analysis (PVA) is a powerful conservation tool, but one that remains unapproachable for many species. This is particularly true for species with multiple, broadly-distributed populations for which collecting suitable data can be challenging. A recently-developed method of multiple population viability analysis (MPVA), however, addresses many limitations of traditional PVA.AuthorsHelen M. Neville, Douglas R. Leasure, Daniel C. Dauwalter, Jason B. Dunham, Robin Bjork, Kurt A. Fesenmyer, Nathan Chelgren, Mary M. Peacock, Charles H. Luce, Daniel J. Isaak, Lee Ann Carranza, Jon Sjoberg, Seth J. WengerEffects of a changing climate on the hydrological cycle in cold desert ecosystems of the Great Basin and Columbia Plateau
Climate change is already resulting in changes in cold desert ecosystems, lending urgency to the need to understand climate change effects and develop effective adaptation strategies. In this review, we synthesize information on changes in climate and hydrologic processes during the last century for the Great Basin and Columbia Plateau, and discuss future projections for the 21st century. We deveAuthorsKeirith A. Snyder, Louisa B. Evers, Jeanne C. Chambers, Jason B. Dunham, John B. Bradford, Michael E. LoikNon-USGS Publications**
Rosenberger, A.E., Dunham, J.B., 2005, Validation of abundance estimates from mark-recapture and removal techniques for rainbow trout captured by electrofishing in small streams: North American Journal of Fisheries Management, v. 25, p. 1395-1410.Dunham, J.B., Pilliod, D.S., Young, M., 2004, Assessing the Consequences of Nonnative Trout in Headwater Ecosystems in Western North America: Fisheries, v. 29, no. 6, p. 18-26, https://doi.org/http://dx.doi.org/10.1577/1548-8446(2004)29[18:ATCONT]2.0.CO;2.Meeuwig, M.H., Dunham, J.B., Hayes, J.P., Vinyard, G.L., 2004, Effects of constant and cyclical thermal regimes on growth and feeding of juvenile cutthroat trout of variable sizes: Ecology of Freshwater Fish, v. 13, p. 208-216.Poole, G.C., Dunham, J.B., Keenan, D.M., Sauter, S.T., McCullough, D.A., Mebane, C., Lockwood, J.C., Essig, D.A., Hicks, M.P., Sturdevant, D.J., Materna, E.J., Spalding, M., Risley, J., Deppman, M., 2004, The case for regime-based water quality standards: BioScience, v. 54, no. 2, p. 155-161.Peterson, J., Dunham, J.B., 2003, Combining inferences from models of capture efficiency, detectability, and suitable habitat to classify landscapes for conservation of threatened bull trout: Conservation Biology, v. 17, no. 4, p. 1070-1077.Dunham, J.B., Schroeter, R., Rieman, B.E., 2003, Influence of maximum water temperature on occurence of Lahotan cutthroat trout within streams: North American Journal of Fisheries Management, v. 23, p. 1042-1049.Dunham, J.B., Rieman, B.E., Chandler, G.L., 2003, Influences of temperature and environmental variable on the distribution of bull trout within streams at the southern margin of its range: North American Journal of Fisheries Management, v. 23, p. 894-904, https://doi.org/http://dx.doi.org/10.1577/M02-028.Isaak, D.J., Thurow, R.F., Rieman, B.E., Dunham, J.B., 2003, Temporal variation in synchrony among Chinook salmon (Oncorhynchus tshawytscha) redd counts from a wilderness area in central Idaho: Canadian Journal of Fisheries and Aquatic Sciences, v. 60, p. 840-848.Dunham, J.B., Adams, S.B., Schroeter, R., Novinger, D.C., 2002, Alien invasions in aquatic ecosystems - Toward an understanding of brook trout invasions and potential impacts on inland cutthroat trout in western North America: Reviews in Fish Biology and Fisheries, v. 12, p. 373-391.Dunham, J.B., Cade, B.S., Terrell, J.W., 2002, Influences of spatial and temporal variation on fish-habitat relationships defined by regression quantiles: Transactions of the American Fisheries Society, v. 131, p. 86-98.Sauter, S.T., McMillan, J.R., Dunham, J.B., 2001, Salmonid behavior and water temperature: US Environmental Protection Agency, Region 10 EPA-910-D-01-001, p. 36.Dunham, J.B., Rieman, B.E., Davis, K., 2001, Sources and magnitude of sampling error in redd counts for bull trout: North American Journal of Fisheries Management, v. 21, p. 343-352.Dunham, J.B., 2000, Book Review - Metapopulations and Ecology by I. Hanksi. Oxford University Press, New York: Ecology, v. 81, no. 6, p. 1757-1758, https://doi.org/10.1890/0012-9658(2000)081[1757:MAE]2.0.CO;2.Dunham, J.B., Rahn, M.E., Schroeter, R., Breck, S.W., 2000, Diets of sympatric Lahontan cutthroat trout and nonnative brook trout- implications for species interactions: Western North American Naturalist, v. 60, no. 3, p. 304-310.Dunham, J.B., Dickerson, B.G., Beever, E.A., Duncan, R.D., Vinyard, G.L., 2000, Effects of food limitation and emigration on self-thinning in experimental minnow cohorts: Journal of Animal Ecology, v. 69, p. 927-934.Rieman, B.E., Dunham, J.B., 2000, Metapopulations and salmonids - A synthesis of life history patterns and empirical observations: Ecology of Freshwater Fish, v. 9, p. 51-64.Dunham, J.B., Peacock, M., Rieman, B.E., Schroeter, R., Vinyard, G.L., 1999, Local and geographic variability in the distribution of stream-living Lahontan cutthroat trout: Transactions of the American Fisheries Society, v. 128, p. 875-889.Dunham, J.B., Rieman, B.E., 1999, Metapopulation structure of bull trout - Influences of physical, biotic, and geometrical landscape characteristics: Ecological Applications, v. 9, no. 2, p. 642-655, https://doi.org/10.1890/1051-0761(1999)009[0642:MSOBTI]2.0.CO;2.Dunham, J.B., Minckley, W.L., 1998, Allozymic variation in desert pupfish from natural and artificial habitats- Genetic conservation in fluctuating populations: Biological Conservation, v. 84, p. 7-15.Dunham, J.B., Vinyard, G.L., Rieman, B.E., 1997, Habitat fragmentation and extinction risk of Lahontan cutthroat trout: North American Journal of Fisheries Management, v. 17, p. 1126-1133.Dunham, J.B., Vinyard, G.L., 1997, Incorporating stream level variability into analysis of site level fish habitat relationships- some cautionary examples: Transactions of the American Fisheries Society, v. 126, p. 323-329.Dunham, J.B., Vinyard, G.L., 1997, Relationships between body mass, population density, and the self thinning rule in stream-living salmonids: Canadian Journal of Fisheries and Aquatic Sciences, v. 54, no. 5, p. 1025-1030, https://doi.org/10.1139/f97-012.Luce, C.H., Rieman, B.E., Dunham, J.B., Clayton, J., King, J.G., and Black, T.A., 2001, Incorporating aquatic ecology into decisions on prioritization of road decommissioning: Water Resources Impact, v. 3, no. 3, p. 8-14.**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
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