Mercury Stable Isotope Assessment of Global Food Webs

This dataset describes mercury (Hg) stable isotope values in fish dorsal muscle from different freshwater environments across the globe. Fish were collected at numerous field sites in North America, South and Central America, Africa, and Asia from 2006-2020. Sub-samples were provided by cooperators to the U.S. Geological Survey Mercury Research Laboratory and the University of Wisconsin for mercury stable isotope analysis. Samples were analyzed for mercury stable isotopes from 2017-2021. These specimens represent multiple trophic levels and body sizes from different food webs and when adequate mass was available, multiple species from the same food web were examined. Cooperators include, but are not limited to:...

Categories: Data; Tags: Aquatic Biology, Botswana, Congo, Environmental Health, Gabon, All tags... Geochemistry, Ghana, Guatemala, Honduras, Kenya, Mongolia, Panama, Suriname, Tanzania, Thailand, USGS Science Data Catalog (SDC), United States, Venezuela, food web, isotopic analysis, mercury contamination, Fewer tags

Mercury stable isotopes in biota, sediment, groundwater, and waste piles, Clear Lake area, Lake County, California, 2019-2022

Samples were collected from Clear Lake, California from 2019-2022 by the U.S. Geological Survey (USGS) California Water Science Center, the USGS Forest and Rangeland Ecosystem Science Center (FRESC), the US Environmental Protection Agency, and EA Engineering Science and Technology Inc. to assess the extent and cycling of legacy mercury (Hg) contamination from Sulphur Bank Mine. Samples of waste rock, sediments, groundwater, and biological tissue (zooplankton, bluegill, smallmouth bass, Mississippi silversides, and largemouth bass) were analyzed for Hg stable isotopes by the U.S. Geological Survey Mercury Research Laboratory. Mercury concentrations for sediments, waste rocks, and groundwaters are included within...

Categories: Data; Tags: California, Clear Lake, California, Environmental Health, Lake County, California, USGS Science Data Catalog (SDC), All tags... fish, groundwater, isotopic analysis, mercury contamination, mine waste, sediment, Fewer tags

Mercury Stable Isotope Measurements in Water and Suspended Particulate Matter from Snake River Tributaries in Idaho and Oregon, USA

This study was designed to examine mercury (Hg) stable isotope values in filtered water and suspended particulate matter from tributaries to the Snake River located in Oregon and Idaho. Water samples were collected from 21 tributary sites representing a range of watershed land use types (e.g., agriculture, forest, etc.) within the Snake River Basin. In 2018, water samples were collected at tributary sites near the confluence of the Snake River and at sites upstream higher in the watershed. In the 2019 and 2020, the tributary water sample collection was focused on downstream sites near the Snake River. In addition, from 2015-2018 Hg stable isotopes were also measured in air, bed sediment, and geologic material from...

Categories: Data; Tags: Environmental Health, Geochemistry, Idaho, Oregon, Snake River, All tags... USGS Science Data Catalog (SDC), Water Quality, geochemistry, hydrology, mercury contamination, Fewer tags

Mercury Stable Isotope Assessment of Dragonflies and Fish Tissues across United States National Parks

This dataset details mercury (Hg) stable isotope values in dragonflies and fish tissues collected across U.S. National Parks. Dragonfly samples were collected as part of the Dragonfly Mercury Project (https://geonarrative.usgs.gov/dmp/), a citizen science project focused on using dragonfly larvae as biosentinels for Hg bioaccumulation. Fish were collected as part of separate park-wide monitoring initiatives. Biological samples were collected from 2014-2019 and composited for Hg stable isotopes measurements by the U.S. Geological Survey Contaminant Ecology Research Laboratory (CERL, Corvallis, Oregon). Measurements for Hg isotopes were performed by the U.S. Geological Survey Mercury Research Laboratory (MRL, Madison,...

Categories: Data; Tags: Acadia National Park, Aquatic Biology, Big Bend National Park, Death Valley National Park, Denali National Park, All tags... Environmental Health, Everglades National Park, Geochemistry, Glacier Bay National Park, Great Basin National Park, Great Smoky Mountains National Park, Katmai National Park, Lake Clark National Park, Lassen Volcanic National Park, Mammoth Cave National Park, Mount Rainier National Park, North Cascades National Park, Olympic National Park, Redwood National Park, Rocky Mountain National Park, Saguaro National Park, Sequoia National Park, Shenandoah National Park, USGS Science Data Catalog (SDC), Yellowstone National Park, Yosemite National Park, Zion National Park, food web, isotopic analysis, mercury contamination, Fewer tags