Data Releases
The data collected and the techniques used by USGS scientists should conform to or reference national and international standards and protocols if they exist and when they are relevant and appropriate. For datasets of a given type, and if national or international metadata standards exist, the data are indexed with metadata that facilitates access and integration.
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Amplicon sequencing of pollen foraged by Bombus affinis for compositional analysis, 2021-2023 Amplicon sequencing of pollen foraged by Bombus affinis for compositional analysis, 2021-2023
This study generated genetic 'metabarcode' data using high-throughput sequencing to characterize pollen foraging behavior of the endangered rusty-patched bumblebee, Bombus affinis. Pollen samples were collected primarily from forest meadow habitats in the Appalachian piedmont of the eastern United States, specifically within the states of Virginia and West Virginia. Three additional...
Imagery, sediment collection, photogrammetry, and meteorological data from July 2023 to November 2024, Grand Falls Dune Field, Arizona Imagery, sediment collection, photogrammetry, and meteorological data from July 2023 to November 2024, Grand Falls Dune Field, Arizona
Grand Falls dune field (GFDF) is located on the Navajo Nation, ~70 km NE of Flagstaff, AZ. This active dune field displays a range of morphologies, including barchans, dome dunes, smaller dunes, and ripples, and is bimodal both in mineralogical composition and grain size distribution. The felsic component is likely derived from the Little Colorado River, and the mafic component (basaltic...
Scientific studies that document invasive grass impacts on fire and methods to control their spread in the Intermountain West, USA from 1985 to 2023 Scientific studies that document invasive grass impacts on fire and methods to control their spread in the Intermountain West, USA from 1985 to 2023
Many non-native invasive grass species increase wildfire activity and recover more quickly than native species. This invasive grass-fire cycle has severe negative consequences for ecosystems, creating a need to understand how different invasive grass species alter fuel characteristics and fire behavior, as well as effective treatments to reduce their spread. We reviewed and compiled...
Guam, Mariana swiftlet nest behavior, 2023-2024 Guam, Mariana swiftlet nest behavior, 2023-2024
The yǻyaguak (Mariana swiftlet; Aerodramus bartschi) is an endangered cave-nesting species historically found on Guam and the southern Mariana Islands, Micronesia. The population on Guam has been severely impacted by the introduction of the brown treesnake (Boiga irregularis). We analyzed nest attendance behavior derived from near-infrared videography at the colonies at Mahlac and...
Simulated lahar extents and dynamics in the Middle Fork Nooksack River drainage, resulting from hypothetical landslide sources on the western summit of Mount Baker, Washington Simulated lahar extents and dynamics in the Middle Fork Nooksack River drainage, resulting from hypothetical landslide sources on the western summit of Mount Baker, Washington
This data release contains model input and postprocessed model output from a set of numerical simulations of hypothetical lahars initiated on Mount Baker, Washington. We constructed a set of landslide sources near the western summit of Mount Baker and simulated their initiation and downslope evolution into long-runout lahars in the Middle Fork of the Nooksack River. These simulations...
Great Lakes Restoration Initiative: Upper East River in-stream phosphorus dynamics data during runoff events in 2022 and 2023 Great Lakes Restoration Initiative: Upper East River in-stream phosphorus dynamics data during runoff events in 2022 and 2023
Nutrient and soil runoff from agricultural fields in the Upper East River basin contribute to eutrophication in downstream waters like Lake Michigan. Phosphorus is often the limiting nutrient in freshwater ecosystems and the binding of dissolved phosphorus to suspended sediment can reduce its bioavailability. These data provide information about what size particles are binding phosphorus...
Model application data for co-developed surface watershed and groundwater hydrologic models for the Upper Colorado River Basin Model application data for co-developed surface watershed and groundwater hydrologic models for the Upper Colorado River Basin
Co-developed surface and subsurface hydrologic models for the Upper Colorado River Basin and the Colorado Plateaus principal aquifer system were used to investigate the drivers of change in hydrologic water budget components during contrasting recent wet (1982–1999) and drought (2000–2022) time periods in select headwater subregions of the Upper Colorado River Basin. The hydrologic...
Effects of hypoxic exposure on survival of larval grass carp (Ctenopharyngodon idella) Effects of hypoxic exposure on survival of larval grass carp (Ctenopharyngodon idella)
We determined the effects of hypoxia exposure on grass carp larvae survival within certain developmental periods. Our goal was to establish a baseline lethal DO concentration based on both time of exposure and water temperature. In 2023 we used 6 different low dissolved oxygen concentrations (0.2, 0.4, 0.6, 0.8, 1.0 and 1.2 mg/L plus a control of 7.0 mg/L) to test survival during short...
Digital data for a 3D geologic model of the Michigan Basin region, Illinois, Indiana, Michigan, Ohio, and Wisconsin, USA (ver. 2.0, February 2026) Digital data for a 3D geologic model of the Michigan Basin region, Illinois, Indiana, Michigan, Ohio, and Wisconsin, USA (ver. 2.0, February 2026)
This digital GIS dataset and accompanying nonspatial files synthesize model outputs from a regional-scale volumetric 3D geologic model that portrays the generalized subsurface geology of the Michigan Basin region of Michigan, Wisconsin, Illinois, Indiana, and Ohio. The intent of this product is to rapidly and efficiently synthesize large quantities of geologic data from a wide variety of...
Atmospheric fallout radionuclide data and geochemical data for soil cores from four uranium mine sites, Mohave County, Arizona, April 2022 Atmospheric fallout radionuclide data and geochemical data for soil cores from four uranium mine sites, Mohave County, Arizona, April 2022
The data represent sediment depth profiles of gamma-emitting radionuclides and major, minor, and trace elements in native soil locations around four mineralized sites in Mohave County, Arizona. The four sites represent breccia pipe uranium deposits in the Grand Canyon Region in various lifecycle stages of mining: EZ2 complex (exploration), Arizona 1 mine (standby), Pinenut mine (closed...
Chesapeake Bay Land Use/Land Cover (LULC) Database 2024 Edition Chesapeake Bay Land Use/Land Cover (LULC) Database 2024 Edition
The Chesapeake Bay Land Use/Land Cover (LULC) Database facilitates the characterization of the landscape over time for three discrete time periods at 1-meter spatial resolution. The database was developed by Chesapeake Conservancy (CC) in cooperation with the University of Vermont’s Spatial Analysis Laboratory and U.S. Geological Survey (USGS) as part of a 6-year Cooperative Agreement...
Uncrewed Aircraft System (UAS) imagery and data products from a multiscale remote sensing field campaign at a biocrust monitoring site located near Castle Valley, Utah in February 2022 Uncrewed Aircraft System (UAS) imagery and data products from a multiscale remote sensing field campaign at a biocrust monitoring site located near Castle Valley, Utah in February 2022
In February 2022, the U.S. Geological Survey (USGS) National Uncrewed Systems Office (NUSO) conducted uncrewed aircraft systems (UAS) remote sensing flights to support biological soil crust (biocrust) research at an experiment site located near Castle Valley, Utah. Researchers at the USGS Southwest Biological Science Center have managed this site for over 50 years to study the effects of