John R Pierce
I am Ecologist at the USGS Forest and Rangeland Ecosystem Science Center
Science and Products
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.
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.
Geochemical data for water, sediment, and biota in Lake Combie, California, 2017-2021 Geochemical data for water, sediment, and biota in Lake Combie, California, 2017-2021
This dataset includes field measurements and laboratory analyses of surface water, bottom water (sediment-water interface), surficial (0-2 cm) sediment, pore water (0-2 cm), and biota collected in Lake Combie, California, from September 2017 through August 2021. The study area includes six sites within the reservoir where discrete samples of surface water, bottom water, sediment, and...
Contaminants in larval, juvenile, and adult Pacific lamprey (Entosphenus tridentatus), Oregon, 2017-2021 Contaminants in larval, juvenile, and adult Pacific lamprey (Entosphenus tridentatus), Oregon, 2017-2021
This data release contains analytical results of organohalogenated compounds and mercury in lamprey and sediment that were collected from rivers in Oregon and along the Pacific northwest coast from 2017 to 2021. In 2017, 20 lamprey were collected off the Washington and Oregon coasts by the National Oceanic and Atmospheric Administration. These ocean-caught juvenile lamprey were...
Total mercury and methylmercury in biota from Cottage Grove Reservoir, Coast Fork Willamette River, and additional reservoirs in Oregon (ver. 2.0, February 2024) Total mercury and methylmercury in biota from Cottage Grove Reservoir, Coast Fork Willamette River, and additional reservoirs in Oregon (ver. 2.0, February 2024)
Comma Separated Value (CSV) file containing data related to total and methyl mercury concentrations in biota from the Willamette Basin in Oregon; specifically, Cottage Grove Reservoir, waters upstream of the reservoir, and additional reservoirs within the Willamette Basin.
Mercury in fishes from Clear Lake, California, 2019 and 2020 (ver. 2.0, February 2022) Mercury in fishes from Clear Lake, California, 2019 and 2020 (ver. 2.0, February 2022)
Comma-separated values (.csv) file containing data related to mercury in fishes collected from Clear Lake, California. These data are superseded by Pierce, J.R., Feyrer, F.V., Young, M.J., Enos, E.R., Clause, J.K., Alpers, C.N., and Eagles-Smith, C.A., 2022, Mercury in biota from Clear Lake, California (ver. 3.0, August 2024): U.S. Geological Survey data release, https://doi.org/10.5066...
Summary of Total Mercury Concentrations in Dragonfly Larvae, Western Mosquitofish, and Tree Swallow Eggs Collected from Cosumnes River Preserve 2011 2013 Summary of Total Mercury Concentrations in Dragonfly Larvae, Western Mosquitofish, and Tree Swallow Eggs Collected from Cosumnes River Preserve 2011 2013
The Cosumnes River Preserve in the Californias Central Valley contains a mosaic of managed wetlands where conditions may promote high levels of methylmercury bioaccumulation. In order to document potential environmental health risk in these wetlands due to mercury, we analyzed dragonfly larvae, western mosquitofish, and tree swallow eggs collected from wetlands and rice fields of the...
Science and Products
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.
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.
Geochemical data for water, sediment, and biota in Lake Combie, California, 2017-2021 Geochemical data for water, sediment, and biota in Lake Combie, California, 2017-2021
This dataset includes field measurements and laboratory analyses of surface water, bottom water (sediment-water interface), surficial (0-2 cm) sediment, pore water (0-2 cm), and biota collected in Lake Combie, California, from September 2017 through August 2021. The study area includes six sites within the reservoir where discrete samples of surface water, bottom water, sediment, and...
Contaminants in larval, juvenile, and adult Pacific lamprey (Entosphenus tridentatus), Oregon, 2017-2021 Contaminants in larval, juvenile, and adult Pacific lamprey (Entosphenus tridentatus), Oregon, 2017-2021
This data release contains analytical results of organohalogenated compounds and mercury in lamprey and sediment that were collected from rivers in Oregon and along the Pacific northwest coast from 2017 to 2021. In 2017, 20 lamprey were collected off the Washington and Oregon coasts by the National Oceanic and Atmospheric Administration. These ocean-caught juvenile lamprey were...
Total mercury and methylmercury in biota from Cottage Grove Reservoir, Coast Fork Willamette River, and additional reservoirs in Oregon (ver. 2.0, February 2024) Total mercury and methylmercury in biota from Cottage Grove Reservoir, Coast Fork Willamette River, and additional reservoirs in Oregon (ver. 2.0, February 2024)
Comma Separated Value (CSV) file containing data related to total and methyl mercury concentrations in biota from the Willamette Basin in Oregon; specifically, Cottage Grove Reservoir, waters upstream of the reservoir, and additional reservoirs within the Willamette Basin.
Mercury in fishes from Clear Lake, California, 2019 and 2020 (ver. 2.0, February 2022) Mercury in fishes from Clear Lake, California, 2019 and 2020 (ver. 2.0, February 2022)
Comma-separated values (.csv) file containing data related to mercury in fishes collected from Clear Lake, California. These data are superseded by Pierce, J.R., Feyrer, F.V., Young, M.J., Enos, E.R., Clause, J.K., Alpers, C.N., and Eagles-Smith, C.A., 2022, Mercury in biota from Clear Lake, California (ver. 3.0, August 2024): U.S. Geological Survey data release, https://doi.org/10.5066...
Summary of Total Mercury Concentrations in Dragonfly Larvae, Western Mosquitofish, and Tree Swallow Eggs Collected from Cosumnes River Preserve 2011 2013 Summary of Total Mercury Concentrations in Dragonfly Larvae, Western Mosquitofish, and Tree Swallow Eggs Collected from Cosumnes River Preserve 2011 2013
The Cosumnes River Preserve in the Californias Central Valley contains a mosaic of managed wetlands where conditions may promote high levels of methylmercury bioaccumulation. In order to document potential environmental health risk in these wetlands due to mercury, we analyzed dragonfly larvae, western mosquitofish, and tree swallow eggs collected from wetlands and rice fields of the...