The dataset includes specifics on bird blood and aquatic invertebrate tissue mercury concentrations measured using direct mercury analysis.

The persistence and degree of mercury contamination of the lower Carson River system (LCRS) have led to placement of a portion of the Carson River Basin (including Lahontan Reservoir) on the US. Environmental Protection Agency (EPA) National Priorities List ("Superfund") for research and cleanup. The potential toxicity of mercury concentrations within the LCRS to piscivorous birds (snowy egrets, black-crowned night-herons, and double-crested cormorants) was examined from 1997-2006. This data set supports the following publications: Henny, C.J., Hill, E.F., Grove, R.A., Kaiser, J.L., 2007, Mercury and drought along the lower Carson River, Nevada- I. Snowy egret and black-crowned night-heron annual exposure to mercury, 1997-2006: Archives of Environmental Contamination and Toxicology, v. 53, p. 269-280. Hill, E.F., Henny, C.J., Grove, R.A., 2008, Mercury and drought along the lower Carson River, Nevada- II. Snowy egret and black-crowned night-heron reproduction on Lahontan Reservoir, 1997-2006: Ecotoxicology, v. 17, p. 117-131. Hoffman, D.J., Henny, C.J., Hill, E.F., Grove, R.A., Kaiser, J.L., Stebbins, K.R., 2009, Mercury and drought along the lower Carson River, Nevada- III. Effects on blood and organ biochemistry and histopathology of snowy egrets and black-crowned night-herons on Lahontan Reservoir, 2002-2006: Journal of Toxicology and Environmental Health, Part A, v. 72, p. 1223-1241.

This dataset includes bird species, invertebrate order and family, sample identification codes, capture date, latitude, longitude, habitat, site name, bird age, total mercury concentrations in bird blood, and methylmercury concentrations in whole body aquatic invertebrates.

The persistence and degree of mercury contamination of the lower Carson River system (LCRS) have led to placement of a portion of the Carson River Basin (including Lahontan Reservoir) on the US. Environmental Protection Agency (EPA) National Priorities List ("Superfund") for research and cleanup. The potential toxicity of mercury concentrations within the LCRS to piscivorous birds (snowy egrets, black-crowned night-herons, and double-crested cormorants) was examined from 1997-2006. This data set supports the following publications: Henny, C.J., Hill, E.F., Grove, R.A., Kaiser, J.L., 2007, Mercury and drought along the lower Carson River, Nevada- I. Snowy egret and black-crowned night-heron annual exposure to mercury, 1997-2006: Archives of Environmental Contamination and Toxicology, v. 53, p. 269-280. Hill, E.F., Henny, C.J., Grove, R.A., 2008, Mercury and drought along the lower Carson River, Nevada- II. Snowy egret and black-crowned night-heron reproduction on Lahontan Reservoir, 1997-2006: Ecotoxicology, v. 17, p. 117-131. Hoffman, D.J., Henny, C.J., Hill, E.F., Grove, R.A., Kaiser, J.L., Stebbins, K.R., 2009, Mercury and drought along the lower Carson River, Nevada- III. Effects on blood and organ biochemistry and histopathology of snowy egrets and black-crowned night-herons on Lahontan Reservoir, 2002-2006: Journal of Toxicology and Environmental Health, Part A, v. 72, p. 1223-1241.

Comma-separated values (.csv) file containing data related to mercury in biota collected from Clear Lake California.

Comma-separated values (.csv) file containing data related to mercury in smallmouth bass (Micropterus dolomieu) collected from the Snake River, USA.

Comma-separated values (.csv) file containing data related to amphibian sampling across the United States between 2016 and 2021. Data files contain mercury concentrations in amphibian and dragonfly tissues, mercury concentrations in sediment, as well as amphibian morphometrics, and habitat and climate characteristics where the samples were collected.

We investigated whether foraging habitat, sex, or fidelity to a foraging area effected blood mercury concentrations in western gulls (Larus occidentalis) from three colonies on the west coast of the United States. Dataset includes total mercury concentrations in western gulls from three colony locations and associated foraging habitat of individual gulls.

Comma-separated values (.csv) file containing data related to mercury concentrations in dragonfly samples from the Willamette River Basin collected in 2023.

These data were collected as part of the Southwest Alaska Inventory and Monitoring Network (SWAN) freshwater contaminants protocol. The protocol outlines a framework for monitoring mercury (Hg) concentrations in resident lake fish within SWAN parks. The primary goal of this monitoring is to understand the spatial differences, temporal trends, and health ramifications of Hg contamination in resident lake fish. Monitoring relies on total Hg in fish axial muscle as an indicator of methyl Hg exposure. It targets four high-priority lakes which vary in size, depth, wetland cover, glacial influence, and Hg concentration. These lakes are in Katmai National Park and Preserve (KATM). The focal species is lake trout (Salvelinus namaycush), a widespread, long lived, top predator in SWAN lakes. However, if other species are sampled as bycatch, they may be retained and analyzed if they represent species-specific data gaps in Hg concentration. Two broad types of data are generated from this protocol. The first type includes observations and measurements that are recorded while sampling and processing fish (e.g., length, weight, sex). The second type includes results of analyses performed by contract laboratories (e.g., age, total Hg). This particular dataset includes those two broad types of data for 40 fish sampled in 2021. Of those fish, all 40 were lake trout.