Environmental stressors that impact habitat and wildlife species include: abiotic factors (for example, land use, temperature); soil, air, and water quality (for example, eutrophication, contaminants); and disturbance (for example, fire, drought, hurricanes, species invasions). Understanding how these stressors impact ecosystems is critical to conservation and management.
Chemical and isotopic techniques are very useful for improving our mechanistic understanding of the role of environmental stressors on ecosystems and wildlife species. Studies within this project generally emphasize animal fitness impacts related to stressors, such as food web disruptions, changes in resource quantity and quality, trophic transfer of non-essential elements, and the effects of landscape disturbances.
Tracer data can be used qualitatively and quantitatively to estimate effects, assess risk, and inform management actions. Such approaches are also very amenable to a range of temporal and spatial scales, where previous studies have ranged from discrete river drainages to oceanic basins and retrospective study designs that rely on environmental archives or museum specimens.
Geology, Geophysics, and Geochemistry Stable Isotope Laboratory (GSIL)
Food Webs and Wildlife Nutrition
Ecosystem Biogeochemistry
Wildlife Biogeography
Water chemistry, stable isotopes, and trace metals in sediment, water and biota in Torch Lake and Gratiot Lake, Keweenaw Peninsula, Michigan, USA, July and October 2021 Water chemistry, stable isotopes, and trace metals in sediment, water and biota in Torch Lake and Gratiot Lake, Keweenaw Peninsula, Michigan, USA, July and October 2021
Geochemical Analyses of Water, Mine tailings, Fluvial Suspended Sediments, Fluvial Bed Sediments, and Fluvial Flood Deposit Sediments from the Big River and Meramec River Drainage Basins, Missouri Geochemical Analyses of Water, Mine tailings, Fluvial Suspended Sediments, Fluvial Bed Sediments, and Fluvial Flood Deposit Sediments from the Big River and Meramec River Drainage Basins, Missouri
Laboratory analyses for fish tissue samples from Lake Koocanusa and Kootenai River Basin, Montana, 2022 (ver. 2.0, May 2025) Laboratory analyses for fish tissue samples from Lake Koocanusa and Kootenai River Basin, Montana, 2022 (ver. 2.0, May 2025)
Modeled Pacific salmon escapement biomass and nutrient and contaminant concentrations across western North America, 1976-2015 (version 2.0, October 2024) Modeled Pacific salmon escapement biomass and nutrient and contaminant concentrations across western North America, 1976-2015 (version 2.0, October 2024)
Total mercury, methylmercury, and isotopic composition in various life stages of boreal chorus frogs (Pseudacris maculata) at two subalpine ponds in the Rocky Mountains, CO, USA, 2015 Total mercury, methylmercury, and isotopic composition in various life stages of boreal chorus frogs (Pseudacris maculata) at two subalpine ponds in the Rocky Mountains, CO, USA, 2015
Mercury concentrations, isotopic composition, biomass, and taxonomy of stream and riparian organisms in the vicinity of Yellow Pine, Idaho, 2015-2016. Mercury concentrations, isotopic composition, biomass, and taxonomy of stream and riparian organisms in the vicinity of Yellow Pine, Idaho, 2015-2016.
Below are publications associated with this project.
Metal-rich lacustrine sediments from legacy mining perpetuate copper exposure to aquatic-riparian food webs Metal-rich lacustrine sediments from legacy mining perpetuate copper exposure to aquatic-riparian food webs
Continental-scale nutrient and contaminant delivery by Pacific salmon Continental-scale nutrient and contaminant delivery by Pacific salmon
Complex life histories alter patterns of mercury exposure and accumulation in a pond-breeding amphibian Complex life histories alter patterns of mercury exposure and accumulation in a pond-breeding amphibian
Increased mercury and reduced insect diversity in linked stream-riparian food webs downstream of a historical mercury mine Increased mercury and reduced insect diversity in linked stream-riparian food webs downstream of a historical mercury mine
Temporal influences on selenium partitioning, trophic transfer, and exposure in a major U.S. river Temporal influences on selenium partitioning, trophic transfer, and exposure in a major U.S. river
Benthic algal (Periphyton) growth rates in response to nitrogen and phosphorus: Parameter estimation for water quality models Benthic algal (Periphyton) growth rates in response to nitrogen and phosphorus: Parameter estimation for water quality models
Environmental stressors that impact habitat and wildlife species include: abiotic factors (for example, land use, temperature); soil, air, and water quality (for example, eutrophication, contaminants); and disturbance (for example, fire, drought, hurricanes, species invasions). Understanding how these stressors impact ecosystems is critical to conservation and management.
Chemical and isotopic techniques are very useful for improving our mechanistic understanding of the role of environmental stressors on ecosystems and wildlife species. Studies within this project generally emphasize animal fitness impacts related to stressors, such as food web disruptions, changes in resource quantity and quality, trophic transfer of non-essential elements, and the effects of landscape disturbances.
Tracer data can be used qualitatively and quantitatively to estimate effects, assess risk, and inform management actions. Such approaches are also very amenable to a range of temporal and spatial scales, where previous studies have ranged from discrete river drainages to oceanic basins and retrospective study designs that rely on environmental archives or museum specimens.
Geology, Geophysics, and Geochemistry Stable Isotope Laboratory (GSIL)
Food Webs and Wildlife Nutrition
Ecosystem Biogeochemistry
Wildlife Biogeography
Water chemistry, stable isotopes, and trace metals in sediment, water and biota in Torch Lake and Gratiot Lake, Keweenaw Peninsula, Michigan, USA, July and October 2021 Water chemistry, stable isotopes, and trace metals in sediment, water and biota in Torch Lake and Gratiot Lake, Keweenaw Peninsula, Michigan, USA, July and October 2021
Geochemical Analyses of Water, Mine tailings, Fluvial Suspended Sediments, Fluvial Bed Sediments, and Fluvial Flood Deposit Sediments from the Big River and Meramec River Drainage Basins, Missouri Geochemical Analyses of Water, Mine tailings, Fluvial Suspended Sediments, Fluvial Bed Sediments, and Fluvial Flood Deposit Sediments from the Big River and Meramec River Drainage Basins, Missouri
Laboratory analyses for fish tissue samples from Lake Koocanusa and Kootenai River Basin, Montana, 2022 (ver. 2.0, May 2025) Laboratory analyses for fish tissue samples from Lake Koocanusa and Kootenai River Basin, Montana, 2022 (ver. 2.0, May 2025)
Modeled Pacific salmon escapement biomass and nutrient and contaminant concentrations across western North America, 1976-2015 (version 2.0, October 2024) Modeled Pacific salmon escapement biomass and nutrient and contaminant concentrations across western North America, 1976-2015 (version 2.0, October 2024)
Total mercury, methylmercury, and isotopic composition in various life stages of boreal chorus frogs (Pseudacris maculata) at two subalpine ponds in the Rocky Mountains, CO, USA, 2015 Total mercury, methylmercury, and isotopic composition in various life stages of boreal chorus frogs (Pseudacris maculata) at two subalpine ponds in the Rocky Mountains, CO, USA, 2015
Mercury concentrations, isotopic composition, biomass, and taxonomy of stream and riparian organisms in the vicinity of Yellow Pine, Idaho, 2015-2016. Mercury concentrations, isotopic composition, biomass, and taxonomy of stream and riparian organisms in the vicinity of Yellow Pine, Idaho, 2015-2016.
Below are publications associated with this project.