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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
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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Distribution, Abundance, and Breeding Activities of the Southwestern Willow Flycatcher at Marine Corps Base Camp Pendleton, California—2020 Annual Report Distribution, Abundance, and Breeding Activities of the Southwestern Willow Flycatcher at Marine Corps Base Camp Pendleton, California—2020 Annual Report
Executive Summary Surveys for the endangered Southwestern Willow Flycatcher (Empidonax traillii extimus) were done at Marine Corps Base Camp Pendleton (MCBCP or “Base”), California, between May 4 and July 31, 2020. All of MCBCP’s historically occupied riparian habitat (core survey area) was surveyed for flycatchers in 2020. Additionally, one-fifth of the unoccupied riparian habitat (non...
Authors
Scarlett L. Howell, Barbara E. Kus
Distribution, abundance, and habitat characteristics of Coastal Cactus Wrens (Campylorhynchus brunneicapillus) in San Diego County, California—2023 Data Summary Distribution, abundance, and habitat characteristics of Coastal Cactus Wrens (Campylorhynchus brunneicapillus) in San Diego County, California—2023 Data Summary
Executive Summary We surveyed for coastal Cactus Wren (Campylorhynchus brunneicapillus) in 507 established plots in San Diego County in 2023, encompassing 4 genetic clusters (Otay, Lake Jennings, Sweetwater/Encanto, and San Pasqual). Two surveys were completed at each plot between March 1 and July 31. Cactus Wrens were detected in 181 plots (36 percent of plots). Cactus Wrens were...
Authors
Suellen Lynn, Barbara E. Kus
Nihoa and Laysan Island passerines population abundances, trends, and habitat utilization Nihoa and Laysan Island passerines population abundances, trends, and habitat utilization
Nihoa and Laysan Island, part of the Northwestern Hawaiian Islands, are host to three endangered passerine species—Nihoa finch (Telespiza ultima), Nihoa millerbird (Acrocephalus familiaris kingi), and Laysan finch (Telespiza cantans). Using point-transect distance sampling survey records from 2010 to 2022 for Nihoa and 2013 to 2019 for Laysan Island, we estimated the density and...
Authors
Trevor Bak, Richard J. Camp, Chris Farmer, Rachel A. Rounds, Sheldon M. Plentovich, John Vetter, Paul C. Banko
Peak streamflow trends in Illinois and their relation to changes in climate, water years 1921–2020 Peak streamflow trends in Illinois and their relation to changes in climate, water years 1921–2020
This report characterizes changes in peak streamflow in Illinois and the relation of these changes to climatic variability, and provides a foundation for future studies that can address nonstationarity in peak-flow frequency analysis in Illinois. Records of annual peak and daily streamflow at streamgages and gridded monthly climatic data (observed and modeled) were examined across four...
Authors
Mackenzie K. Marti, Thomas M. Over
Accuracy assessment of three-dimensional point cloud data collected with a scanning total station on Shinnecock Nation Tribal lands in Suffolk County, New York Accuracy assessment of three-dimensional point cloud data collected with a scanning total station on Shinnecock Nation Tribal lands in Suffolk County, New York
A combined point cloud of about 85.6 million points was collected during 27 scans of a section of the western shoreline along the Shinnecock Peninsula of Suffolk County, New York, to document baseline geospatial conditions during July and October 2022 using a scanning total station. The three-dimensional accuracy of the combined point cloud is assessed to identify potential systematic...
Authors
Michael L. Noll, William D. Capurso, Anthony Chu
Groundwater, surface-water, and water-chemistry data, Black Mesa area, northeastern Arizona—2019–2021 Groundwater, surface-water, and water-chemistry data, Black Mesa area, northeastern Arizona—2019–2021
The Navajo (N) aquifer is an extensive aquifer and the primary source of groundwater in the 5,400-square-mile Black Mesa area in northeastern Arizona. Water availability is an important issue in the Black Mesa area because of the arid climate, past industrial water use, and continued water requirements for municipal use by a growing population. Precipitation in the area typically ranges...
Authors
Jon P. Mason
Yellowstone Volcano Observatory 2023 annual report Yellowstone Volcano Observatory 2023 annual report
The Yellowstone Volcano Observatory (YVO) monitors volcanic and hydrothermal activity associated with the Yellowstone magmatic system, carries out research into magmatic processes occurring beneath Yellowstone caldera, and issues timely warnings and guidance related to potential future geologic hazards. YVO is a collaborative consortium that includes the U.S. Geological Survey (USGS)...
Authors
Yellowstone Volcano Observatory
National Aquatic Environmental DNA Strategy National Aquatic Environmental DNA Strategy
Aquatic life is the engine of ecosystems and economies. In environments ranging from freshwater through marine, this biodiversity underpins the health, culture, opportunities, and economic wellbeing of the Nation -- from local communities to the entire country. The ability to evaluate the status, trends, and future projections of nature is key to maintaining national prosperity, and this...
Authors
Kelly D Goodwin, Mike Weise, Christopher P. Meyer, Masha Edmondson, Katie Fillingham, Dee Allen, Alicia Amerson, Meredith L. Barton, Abby Benson, Gabrielle Canonico, Zachary Gold, Jennifer Gumm, Margaret Hunter, Nina Joffe, Richard Lance, Alyse Larkin, Ricardo Letelier, Christine Lipsky, Dana McCoskey, Cheryl Morrison, Karen Clark, John A. Darling, Amelia-Juliette Demery, Meredith Everett, Colette Fletcher-Hoppe, Krista M. Nichols, Kim M. Parsons, James Price, Kimberly Puglise, Katie Scholl, Mike K Schwartz, Adam J. Sepulveda, Janet Shannon, Woody Turner, Timothy White
The U.S. Geological Survey Ohio Water Microbiology Laboratory The U.S. Geological Survey Ohio Water Microbiology Laboratory
The U.S. Geological Survey Ohio Water Microbiology Laboratory is a part of the Ohio-Kentucky-Indiana Water Science Center. The mission of the laboratory is to provide microbiological data of public health significance from surface waters, groundwaters, and sediments for a variety of study objectives. The laboratory conducts internal projects, works with external cooperators, and assists...
Authors
Braden M. Lanier, Amie M.G. Brady, Jessica R. Cicale, Christopher M. Kephart, Lauren D. Lynch, Maxim W. Schroeder, Erin A. Stelzer
Bees of the Buenos Aires National Wildlife Refuge—A preliminary report on a bee survey in a vulnerable semi-desert grassland of the Sonoran Desert Bees of the Buenos Aires National Wildlife Refuge—A preliminary report on a bee survey in a vulnerable semi-desert grassland of the Sonoran Desert
Pollinators are vital to the continued existence and seed production of about 87.5 percent of all flowering plants (Ollerton and others, 2011). In the semi-desert grasslands of Buenos Aires National Wildlife Refuge, in the Sonoran Desert of the United States, flowering forbs provide seed vital to the food base of wildlife, including the 136 species of resident and migratory birds using...
Authors
Kathryn A. Thomas, Angela M. Hoover, M. Kathryn Busby
Management challenge: The RAD Framework to address ecological transformation Management challenge: The RAD Framework to address ecological transformation
No abstract available.
Authors
Kelly Fisher, Alison K. Post, Brendan K. Hobart, Nayani T Ilangakoon, Casey Jenson, Anirudh Maiya, Wynne Emily Moss, R. C. Nagy
Neotropical migratory bird monitoring study at Marine Corps Base Camp Pendleton, California—2021 annual data summary Neotropical migratory bird monitoring study at Marine Corps Base Camp Pendleton, California—2021 annual data summary
Executive Summary Two Monitoring Avian Productivity and Survivorship (MAPS) stations were operated at Marine Corps Base Camp Pendleton (MCBCP), California, in 2021: one at De Luz Creek and one at the Santa Margarita River. The stations were established to provide data on Neotropical migratory birds at MCBCP to support the dual missions of environmental stewardship and military readiness...
Authors
Shannon M. Mendia, Barbara E. Kus