Biogeochemical cycles impart significant control on ecosystem structure, function, and ecosystem services, such as nutrient sequestration, transformation, long-term storage, mitigation of water quality concerns, and carbon fixation/mineralization processes that support local food webs.
Isotope geochemistry offers novel insight into sources, processes, and fates of a broad array of elements that are relevant to ecosystem science. These geochemical insights also integrate well with food web studies, offering a more complete assessment of critical nutrient sources, fixation, and ultimately secondary production.
This project includes studies that explicitly focus on elements (for example, carbon, nitrogen, sulfur) that have strong linkages between geochemical compartments and biological production (for example, nutrient sources/fates, decomposition, carbon fixation, food webs) as well as related processes for non-essential elements (for example, bioaccumulation) and long-term storage/permanence important to ecosystem function and persistence (for example, soil carbon). The latter also includes studies of natural environmental archives (for example, tree rings, sediments) that inform on historical and contemporary ecosystem health with the goal of aiding conservation and management.
Geology, Geophysics, and Geochemistry Stable Isotope Laboratory (GSIL)
Trophic pathways supporting juvenile Chinook and Coho salmon in the glacial Susitna River, Alaska: patterns of freshwater, marine, and terrestrial resource use across a seasonally dynamic habitat mosaic Trophic pathways supporting juvenile Chinook and Coho salmon in the glacial Susitna River, Alaska: patterns of freshwater, marine, and terrestrial resource use across a seasonally dynamic habitat mosaic
Wood decay in desert riverine environments Wood decay in desert riverine environments
Isotopic insights into biological regulation of zinc in contaminated systems Isotopic insights into biological regulation of zinc in contaminated systems
Ecotoxicoparasitology: Understanding mercury concentrations in gut contents, intestinal helminths and host tissues of Alaskan gray wolves (Canis lupus) Ecotoxicoparasitology: Understanding mercury concentrations in gut contents, intestinal helminths and host tissues of Alaskan gray wolves (Canis lupus)
Mercury cycling in agricultural and managed wetlands: a synthesis of methylmercury production, hydrologic export, and bioaccumulation from an integrated field study Mercury cycling in agricultural and managed wetlands: a synthesis of methylmercury production, hydrologic export, and bioaccumulation from an integrated field study
Holocene dynamics of the Florida Everglades with respect to climate, dustfall, and tropical storms Holocene dynamics of the Florida Everglades with respect to climate, dustfall, and tropical storms
Mercury cycling in agricultural and managed wetlands of California: experimental evidence of vegetation-driven changes in sediment biogeochemistry and methylmercury production Mercury cycling in agricultural and managed wetlands of California: experimental evidence of vegetation-driven changes in sediment biogeochemistry and methylmercury production
Carbon and sediment accumulation in the Everglades (USA) during the past 4000 years: rates, drivers, and sources of error Carbon and sediment accumulation in the Everglades (USA) during the past 4000 years: rates, drivers, and sources of error
Benthic macroinvertebrate and fish communities in Lake Huron are linked to submerged groundwater vents Benthic macroinvertebrate and fish communities in Lake Huron are linked to submerged groundwater vents
Isotope and Chemical Methods in Support of the U.S. Geological Survey Science Strategy, 2003-2008 Isotope and Chemical Methods in Support of the U.S. Geological Survey Science Strategy, 2003-2008
Biogeochemical cycles impart significant control on ecosystem structure, function, and ecosystem services, such as nutrient sequestration, transformation, long-term storage, mitigation of water quality concerns, and carbon fixation/mineralization processes that support local food webs.
Isotope geochemistry offers novel insight into sources, processes, and fates of a broad array of elements that are relevant to ecosystem science. These geochemical insights also integrate well with food web studies, offering a more complete assessment of critical nutrient sources, fixation, and ultimately secondary production.
This project includes studies that explicitly focus on elements (for example, carbon, nitrogen, sulfur) that have strong linkages between geochemical compartments and biological production (for example, nutrient sources/fates, decomposition, carbon fixation, food webs) as well as related processes for non-essential elements (for example, bioaccumulation) and long-term storage/permanence important to ecosystem function and persistence (for example, soil carbon). The latter also includes studies of natural environmental archives (for example, tree rings, sediments) that inform on historical and contemporary ecosystem health with the goal of aiding conservation and management.