Data

The U.S. Geological Survey (USGS) has compiled the Energy Geochemistry Database (EGDB), containing 3,619,149 analytical results for 111,791 samples collected by the Energy Resources Program (ERP) to develop an understanding of the physical and geochemical processes responsible for hydrocarbon formation. It also serves as a tool to assess oil and gas potential for sedimentary basins in...

This dataset contains a list of words that occurred at least 100 times from a news media search in LexisNexis, a large news archive database, about water bottling facilities in the U.S. from 1990 to 2024. Each word listed was classified as typically discussed in the context of the environment, the economy, both or neither. The data was used to conduct natural language processing lexicon...

This data release provides phytoplankton environmental DNA data and cyanotoxin gene qPCR data from an algal bloom at Ash River Boat Docks on Kabetogama Lake, Voyageurs National Park, Minnesota, USA (USGS site ID 482603092511801) collected in 2021 and analyzed by the commercial laboratory Jonah Ventures. We sampled cyanobacteria over a 24-hour period at Ash River Boat Docks in Kabetogama...

This data release provides phytoplankton and fish environmental DNA (eDNA) and cyanotoxin biosynthesis gene abundance data from an algal bloom at Ash River Boat Docks on Kabetogama Lake (USGS site ID 482603092511801) collected between September 12 and September 13, 2023. Algal bloom samples were collected every three hours over a 24-hour period at two sites, one at the end of a dock and...

Environmental DNA (eDNA) metabarcoding may have utility in biodiversity surveys of marine environments, particularly for small, rare, or cryptic taxa that are more difficult to study using traditional methods (e.g., trawling and visual surveys). For this study, we used an eDNA metabarcoding approach to characterize biodiversity in the above-seafloor water column across three West Coast...

We used an environmental DNA (eDNA) autosampler and a backpack manual sampler to collect eDNA samples at Naval Base Ventura County's Point Mugu Sea Range in May and June 2025. Samples were sent to Wilderlab for metabarcoding analysis using their basic panel of five primers to amplify DNA from a variety of taxa, including vertebrates (fish, mammals, reptiles, amphibians, and birds)...

We used Wilderlab eDNA kits to collect eDNA samples in a creek colloquially known as Cañada del Puerto Creek (Hydrologic Unit Code 12 number 180600140201) on Santa Cruz Island, California, in May 2025. Samples were sent to Wilderlab for metabarcoding analysis using their comprehensive panel of assays to amplify DNA from a variety of taxa, including vertebrates (fish, mammals, reptiles...

Quantitative PCR results for surveillance of New Zealand mudsnail environmental DNA at the U.S. Fish and Wildlife Service Alchesay National Fish Hatchery.

This U.S. Geological Survey (USGS) data release provides the data used to predict areas with the greatest probability of ephemeral stream channel instability on north side of the Grand Valley in western Colorado, during 2018-20. The USGS developed a method for automatically extracting channel cross-section geometry from existing remotely sensed terrain models. Based on estimated flood...

To explore the capacity of microbiota to reflect water quality, we advanced methods using flow cytometry for measuring bacterial metabolic activity. After exposure of three bacterial species to five compounds that can be found in watersheds (i.e., an herbicide, a preservative, an antibiotic, and two hormones), flow cytometry methodology was used to measure esterase activity.

This dataset contains known and estimated ages of polar bears sampled from the southern Beaufort Sea of Alaska. Whole blood was collected from polar bears of known chronological age between 1987 and 2016. Chronological age was known because all the bears in this data set were initially captured as a dependent cub-of-the-year, yearling, or 2-year-old, and that allowed us to know...

The Edwards aquifer in south-central Texas is one of the most permeable and productive aquifers in the United States and is the major source of public water supply for Bexar, Comal, Hays, Medina, and Uvalde Counties. The Edwards aquifer also supplies large quantities of water for use in agriculture, business, and industry in the region. The major artesian springs of the Edwards aquifer...