Cold-water fishes like trout, salmon, and charr are especially vulnerable to shifting conditions related to climate change; for example, warmer temperatures and more variable hydroclimate. Native cutthroat trout of the southern Rocky Mountains now only occupy a tiny fraction of their historic habitats because of stressors such as non-native fishes, habitat fragmentation, and detrimental land management practices.
Using a combination of field and modeling approaches, we address how climate may influence native cutthroat trout and how conservation strategies can be tailored in a climate-smart approach to maximize conservation benefits under recent and projected climate conditions. Our research includes modeling surface temperatures for mountain lakes, and examining how altered thermal and hydrologic regimes affect critical life history events, such as spawning migrations. Ultimately, we will integrate these ecological patterns into state-of-the-art decision support models and use these models as tools to aid in the conservation of native cutthroat trout populations.
Below are other science projects associated with this project.
Aquatic Ecology and Contaminants
Below are publications associated with this project.
Past and future warming of a deep European lake (Lake Lugano): What are the climatic drivers?
Assessing and addressing the re-eutrophication of Lake Erie: central basin hypoxia
Fragmentation and thermal risks from climate change interact to affect persistence of native trout in the Colorado River basin
Estimating risks to aquatic life using quantile regression
Characterizing invertebrate traits in wadeable streams of the contiguous US: differences among ecoregions and land uses
The past as prelude to the future for understanding 21st-century climate effects on Rocky Mountain Trout
Indirect consequences of hypolimnetic hypoxia on zooplankton growth in a large eutrophic lake
Evidence of hypoxic foraging forays by yellow perch (Perca flavescens) and potential consequences for prey consumption
Effects of hypoxia on consumption, growth, and RNA:DNA ratios of young Yellow Perch
Seasonal and interannual effects of hypoxia on fish habitat quality in central Lake Erie
Reconnaissance of weathering rates in alpine catchments of central Colorado, USA
Climate-induced changes in high elevation stream nitrate dynamics
Below are partners associated with this project.
- Overview
Cold-water fishes like trout, salmon, and charr are especially vulnerable to shifting conditions related to climate change; for example, warmer temperatures and more variable hydroclimate. Native cutthroat trout of the southern Rocky Mountains now only occupy a tiny fraction of their historic habitats because of stressors such as non-native fishes, habitat fragmentation, and detrimental land management practices.
Using a combination of field and modeling approaches, we address how climate may influence native cutthroat trout and how conservation strategies can be tailored in a climate-smart approach to maximize conservation benefits under recent and projected climate conditions. Our research includes modeling surface temperatures for mountain lakes, and examining how altered thermal and hydrologic regimes affect critical life history events, such as spawning migrations. Ultimately, we will integrate these ecological patterns into state-of-the-art decision support models and use these models as tools to aid in the conservation of native cutthroat trout populations.
- Science
Below are other science projects associated with this project.
Aquatic Ecology and Contaminants
The Aquatic Ecology and Contaminants Team investigates critical ecological processes operating in aquatic and riparian ecosystems and how these processes are affected by human activities. We address questions through a combination of field studies, laboratory experiments, and modeling, while working at multiple levels of biological organization from cells through ecosystems. Topics include land... - Publications
Below are publications associated with this project.
Filter Total Items: 13Past and future warming of a deep European lake (Lake Lugano): What are the climatic drivers?
We used four decades (1972–2013) of temperature data from Lake Lugano, Switzerland and Italy, to address the hypotheses that: [i] the lake has been warming; [ii] part of the warming reflects global trends and is independent from climatic oscillations and [iii] the lake will continue to warm until the end of the 21st century. During the time spanned by our data, the surface waters of the lake (0–5AuthorsFabio Lepori, James RobertsAssessing and addressing the re-eutrophication of Lake Erie: central basin hypoxia
Relieving phosphorus loading is a key management tool for controlling Lake Erie eutrophication. During the 1960s and 1970s, increased phosphorus inputs degraded water quality and reduced central basin hypolimnetic oxygen levels which, in turn, eliminated thermal habitat vital to cold-water organisms and contributed to the extirpation of important benthic macroinvertebrate prey species for fishes.AuthorsDonald Scavia, J. David Allan, Kristin K. Arend, Steven Bartell, Dmitry Beletsky, Nate S. Bosch, Stephen B. Brandt, Ruth D. Briland, Irem Daloğlu, Joseph V. DePinto, David M. Dolan, Mary Anne Evans, Troy M. Farmer, Daisuke Goto, Haejin Han, Tomas O. Höök, Roger Knight, Stuart A. Ludsin, Doran Mason, Anna M. Michalak, R. Peter Richards, James Roberts, Daniel K. Rucinski, Edward Rutherford, David J. Schwab, Timothy M. Sesterhenn, Hongyan Zhang, Yuntao ZhouFragmentation and thermal risks from climate change interact to affect persistence of native trout in the Colorado River basin
Impending changes in climate will interact with other stressors to threaten aquatic ecosystems and their biota. Native Colorado River cutthroat trout (CRCT; Oncorhynchus clarkii pleuriticus) are now relegated to 309 isolated high-elevation (>1700 m) headwater stream fragments in the Upper Colorado River Basin, owing to past nonnative trout invasions and habitat loss. Predicted changes in climatAuthorsJames Roberts, Kurt D. Fausch, Douglas P. Peterson, Mevin HootenEstimating risks to aquatic life using quantile regression
One of the primary goals of biological assessment is to assess whether contaminants or other stressors limit the ecological potential of running waters. It is important to interpret responses to contaminants relative to other environmental factors, but necessity or convenience limit quantification of all factors that influence ecological potential. In these situations, the concept of limiting factAuthorsTravis S. Schmidt, William H. Clements, Brian S. CadeCharacterizing invertebrate traits in wadeable streams of the contiguous US: differences among ecoregions and land uses
Much is known about invertebrate community traits in basins across Europe, but no comprehensive description of traits exists for the continental US. Little is known about the trait composition of invertebrates in reference or least-disturbed basins of the US, how trait composition varies among ecoregions, or how consistently traits respond to land use. These elements are essential to development oAuthorsRobert E. Zuellig, Travis S. SchmidtThe past as prelude to the future for understanding 21st-century climate effects on Rocky Mountain Trout
Bioclimatic models predict large reductions in native trout across the Rocky Mountains in the 21st century but lack details about how changes will occur. Through five case histories across the region, we explore how a changing climate has been affecting streams and the potential consequences for trout. Monitoring records show trends in temperature and hydrographs consistent with a warming climateAuthorsDaniel J. Isaak, Clint C. Muhlfeld, Andrew S. Todd, Robert Al-chokhachy, James Roberts, Jeffrey L. Kershner, Kurt D. Fausch, Steven W. HostetlerIndirect consequences of hypolimnetic hypoxia on zooplankton growth in a large eutrophic lake
Diel vertical migration (DVM) of some zooplankters in eutrophic lakes is often compressed during peak hypoxia. To better understand the indirect consequences of seasonal hypolimnetic hypoxia, we integrated laboratory-based experimental and field-based observational approaches to quantify how compressed DVM can affect growth of a cladoceran, Daphnia mendotae, in central Lake Erie, North America. ToAuthorsDaisuke Goto, Kara Lindelof, David L. Fanslow, Stuart A. Ludsin, Steven A. Pothoven, James Roberts, Henry A. Vanderploeg, Alan E. Wilson, Tomas O. HöökEvidence of hypoxic foraging forays by yellow perch (Perca flavescens) and potential consequences for prey consumption
Previous studies in a variety of ecosystems have shown that ecologically and economically important benthic and bentho-pelagic fishes avoid hypoxic (AuthorsJames Roberts, Paul A. Grecay, Stuart A. Ludsin, Steve A. Pothoven, Henry A. Vanderploeg, Tomas O. HöökEffects of hypoxia on consumption, growth, and RNA:DNA ratios of young Yellow Perch
As in various freshwater and coastal marine ecosystems worldwide, seasonal bottom water hypoxia is a recurring phenomenon in Lake Erie’s central basin. While bottom hypoxia can strongly affect sessile benthic animals, its effects on mobile organisms such as fish are less understood. We evaluated the potential for bottom hypoxia to affect the growth rates of yellow perch Perca flavescens, a speciesAuthorsJames Roberts, Stephen B. Brandt, David Fanslow, Stuart A. Ludsin, Steven A. Pothoven, Donald Scavia, Tomas O. HöökSeasonal and interannual effects of hypoxia on fish habitat quality in central Lake Erie
1. Hypoxia occurs seasonally in many stratified coastal marine and freshwater ecosystems when bottom dissolved oxygen (DO) concentrations are depleted below 2–3 mg O2 L-1. 2. We evaluated the effects of hypoxia on fish habitat quality in the central basin of Lake Erie from 1987 to 2005, using bioenergetic growth rate potential (GRP) as a proxy for habitat quality. We compared the effect of hypoxiAuthorsKristin K. Arend, Dmitry Beletsky, Joseph DePinto, Stuart A. Ludsin, James Roberts, Daniel K. Rucinski, Donald Scavia, David J. Schwab, Tomas O. HöökReconnaissance of weathering rates in alpine catchments of central Colorado, USA
No abstract available.AuthorsR.E. Wanty, P. L. Verplanck, C. Bern, T. Todoro, C. San Juan, E.H. deWitt, T. L. Klein, D. Fey, T.S. Schmidt, S. E. ChurchClimate-induced changes in high elevation stream nitrate dynamics
Mountain terrestrial and aquatic ecosystems are responsive to external drivers of change, especially climate change and atmospheric deposition of nitrogen (N). We explored the consequences of a temperature-warming trend on stream nitrate in an alpine and subalpine watershed in the Colorado Front Range that has long been the recipient of elevated atmospheric N deposition. Mean annual stream nitrateAuthorsJill Baron, T.M. Schmidt, M.D. Hartman - Partners
Below are partners associated with this project.