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Browse more than 82,000 reports authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.

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Multitemporal LIDAR analysis of pre- and post-Eagle Creek Fire debris flows, western Columbia River Gorge, Hood River and Multnomah Counties, Oregon Multitemporal LIDAR analysis of pre- and post-Eagle Creek Fire debris flows, western Columbia River Gorge, Hood River and Multnomah Counties, Oregon

No abstract available.
Authors
William J. Burns, Nancy C. Calhoun, Michael Zimmerman, Joshua R. Roering, Maryn Sanders, Benjamin Leshchinsky, David Mariano De Sousa, Michael J. Olsen, Francis K. Rengers, Nicolas Wahde Mathews
By
Geologic Hazards Science Center

Quality of groundwater used for domestic supply in the Gilroy-Hollister basin and surrounding areas, California, 2022 Quality of groundwater used for domestic supply in the Gilroy-Hollister basin and surrounding areas, California, 2022

More than 2 million Californians rely on groundwater from domestic wells for drinking-water supply. This report summarizes a 2022 California Groundwater Ambient Monitoring and Assessment Priority Basin Project (GAMA-PBP) water-quality survey of 33 domestic and small-system drinking-water supply wells in the Gilroy-Hollister Valley groundwater basin and the surrounding areas, where more...
Authors
Kirsten E. Faulkner, Bryant C. Jurgens
By
California Water Science Center

Environmental DNA monitoring of invasive Central American boas in St. Croix at Salt River Bay National Historical Park and Ecological Preserve (SARI) Environmental DNA monitoring of invasive Central American boas in St. Croix at Salt River Bay National Historical Park and Ecological Preserve (SARI)

Invasive Central American boas (Boa imperator) have established a reproducing population on the western side of St. Croix, U.S. Virgin Islands but prevalence throughout the island is largely unknown. The large snakes threaten endemic and endangered species through competition and predation, jeopardizing island biodiversity. Environmental DNA (eDNA) methods were used to investigate...
Authors
Caitlin Beaver, Alexis B. Tays, Wilfre Fuentes Santos, Madison E.A. Harman, Kristen A. Ewen, Evan L. Gwilliam, Margaret Hunter
By
Ecosystems Mission Area, Wetland and Aquatic Research Center

Evaluating mountain goat population structure in Glacier National Park and Waterton Lakes National Park Evaluating mountain goat population structure in Glacier National Park and Waterton Lakes National Park

Mountain goats are an iconic, climate-sensitive species across their North American alpine range. Among its nearly complete complement of native wildlife, no single species embodies Glacier National Park (GNP) more than the mountain goat. They play an important role as an alpine food source for many of the park’s carnivores including wolverines, mountain lions, and grizzly bears...
Authors
Tabitha A. Graves, Eliza Stein, Lindsay M Dose, Rachel S. Crowhurst, Heather Thomas, Clinton W. Epps, Rob Found, Jami Belt, Mark Biel
By
Ecosystems Mission Area, Northern Rocky Mountain Science Center

Effects of climate change on Midwestern ecosystems: Central and Eastern North American Grassland and Shrubland Effects of climate change on Midwestern ecosystems: Central and Eastern North American Grassland and Shrubland

The Central and Eastern North American Grassland and Shrubland ecosystem may be increasingly shaped by intensifying drought and shifting seasonality. Rising temperatures and more variable precipitation, marked by longer dry spells, are projected to increase evapotranspiration and soil moisture deficits, and yield more frequent drought. At the same time, warming temperatures are projected...
Authors
Hugh Ratcliffe, Katherine Charton, Taylor Siddons, Marta P. Lyons, Olivia E. LeDee

Developing eRNA assays for spawning and juvenile bigheaded carps Developing eRNA assays for spawning and juvenile bigheaded carps

No abstract available.
Authors
Stephen Frank Spear
By
Ecosystems Mission Area, Upper Midwest Environmental Sciences Center
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