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PCBs measured in three tributaries of the Niagara River Area of Concern (AOC), 2018-2019 PCBs measured in three tributaries of the Niagara River Area of Concern (AOC), 2018-2019
Water-borne polychlorinated biphenyls (PCBs) were sampled in three tributaries of the Niagara River Area of Concern (AOC) in 2018 and 2019 using semipermeable membrane devices (SPMDs). This data set is a compilation of data from two sampling efforts, focused on determining the presence and distribution of total and congener PCBs in these tributaries.
Boreal toad metamorph capture, recapture and covariates data, Colorado 2017-2018 Boreal toad metamorph capture, recapture and covariates data, Colorado 2017-2018
This dataset includes two files, 1) site -specific covariates including the presence of predators (fish), disease (Batrachochytrium dendrobatidis [Bd] - amphibian chytrid fungus), and permanence (ephemeral or permanent) of sites in Rocky Mountain National Park, Colorado. The dataset was analyzed for planned publication of a manuscript in Population Ecology, Crockett, J., E. Muths and L.L...
Pilot study on bathymetric change analyses in the Sacramento-San Joaquin Delta, California Pilot study on bathymetric change analyses in the Sacramento-San Joaquin Delta, California
The bathymetry of the Sacramento-San Joaquin Delta affects the flow of water and sediment throughout the system and is a basic control on levee stability, habitat distribution, and water quality. Delta bathymetry is dynamic, responding to both natural forces and human activities. Assessment of future Delta conditions is aided by understanding how its bathymetry has changed in the past...
Experimental coral-growth data and time-series imagery for Acropora palmata in the Florida Keys, U.S.A. Experimental coral-growth data and time-series imagery for Acropora palmata in the Florida Keys, U.S.A.
The USGS Coral Reef Ecosystems Studies project (https://coastal.er.usgs.gov/crest/) provides science that helps resource managers tasked with the stewardship of coral reef resources. This data release contains data on coral-growth rates and time-series photographs taken of colonies of the elkhorn coral, Acropora palmata, grown at five sites on the Florida Keys reef tract from spring 2018...
Inorganic Constituent and Ancillary Data for Evaluation of Lithium in Groundwater in the United States, 1991-2018 Inorganic Constituent and Ancillary Data for Evaluation of Lithium in Groundwater in the United States, 1991-2018
Lithium concentrations in untreated groundwater from 1,464 public-supply wells, 1,676 domestic-supply wells, and 1,560 monitoring wells distributed across 33 principal aquifers in the United States were evaluated for spatial variations and possible explanatory factors. For context, lithium concentrations are compared to a drinking-water only threshold (60 mg/L) and a Health-Based...
Arsenic Speciation method performance data, species hold times data and supporting information Arsenic Speciation method performance data, species hold times data and supporting information
This dataset includes data collected to validate a method of analysis for arsenic species As(III), As(V), dimethylarsinate (DMA), and monomethylarsonate (MMA) in surface water and groundwater samples. It also includes site information and water chemistry for samples used in the validation and used for other studies of arsenic species in groundwater. It includes speciation data measured...