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Browse more than 160,000 publications authored by our scientists over the past 100+ year history of the USGS.  Publications available are: USGS-authored journal articles, series reports, book chapters, other government publications, and more.

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We are focused on some of the most significant issues society faces, and our science is making a substantial contribution to the well-being of the Nation and the world. Learn more about the major topics our research covers and the programs focused on those topics.

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Filter Total Items: 175939

Distribution, abundance, and breeding activities of the Southwestern Willow Flycatcher at Marine Corps Base Camp Pendleton, California—2021 annual report Distribution, abundance, and breeding activities of the Southwestern Willow Flycatcher at Marine Corps Base Camp Pendleton, California—2021 annual report

Executive Summary The purpose of this report is to provide the Marine Corps with an annual summary of abundance, breeding activity, demography, and habitat use of the endangered Southwestern Willow Flycatcher (Empidonax traillii extimus) at Marine Corps Base Camp Pendleton (MCBCP). Surveys for the flycatcher were completed at MCBCP between May 5 and July 31, 2021. All of MCBCP’s...
Authors
Scarlett L. Howell, Barbara E. Kus
By
Ecosystems Mission Area, Western Ecological Research Center (WERC)

Hydrogeologic framework and extent of saltwater intrusion in Kings, Queens, and Nassau Counties, Long Island, New York Hydrogeologic framework and extent of saltwater intrusion in Kings, Queens, and Nassau Counties, Long Island, New York

In 2016, the U.S. Geological Survey began a multiyear cooperative study with the New York State Department of Environmental Conservation to evaluate the sustainability of Long Island’s sole-source aquifer system through hydrogeologic mapping, compilation of groundwater chloride concentrations, and groundwater flow modeling. In the initial phase of the islandwide study, the hydrogeologic...
Authors
Frederick Stumm, Jason S. Finkelstein, John H. Williams, Andrew D. Lange
By
Water Resources Mission Area, New York Water Science Center, USGS Science in Long Island Sound and its Watershed

Simulation of groundwater flow in the Long Island, New York regional aquifer system for pumping and recharge conditions from 1900 to 2019 Simulation of groundwater flow in the Long Island, New York regional aquifer system for pumping and recharge conditions from 1900 to 2019

The U.S. Geological Survey has developed a transient, groundwater-flow model that simulates hydrologic conditions in the Long Island aquifer system as part of an ongoing (since 2016) multiyear, cooperative investigation with the New York State Department of Environmental Conservation. The goals of this investigation are to assist stakeholders and resource managers to evaluate the...
Authors
Donald A. Walter, Kalle Jahn, John P. Masterson, Sarken E. Dressler, Jason S. Finkelstein, Monti
By
Water Resources Mission Area, New York Water Science Center

Comparison of seven DNA metabarcoding sampling methods to assess diet in a large avian predator Comparison of seven DNA metabarcoding sampling methods to assess diet in a large avian predator

DNA metabarcoding is a rapidly advancing tool for diet assessment in wildlife ecology. Studies have used a variety of field collection methods to evaluate diet; however, there is a pressing need to understand the differences among sampling methods and the downstream inferential consequences they may have on our ability to document diet accurately and efficiently. We evaluated seven DNA
Authors
Neil Paprocki, Shannon Blair, Courtney J. Conway, Jennifer R. Adams, Stacey A. Nerkowski, Jeff W Kidd, Lisette Waits
By
Cooperative Research Units

Landscape-scale modeling to forecast fluvial-aeolian sediment connectivity in river valleys Landscape-scale modeling to forecast fluvial-aeolian sediment connectivity in river valleys

Sedimentary landforms on Earth and other planetary bodies are built through scour, transport, and deposition of sediment. Sediment connectivity refers to the hypothesis that pathways of sediment transport do not occur in isolation, but rather are mechanistically linked. In dryland river systems, one such example of sediment connectivity is the transport of fluvially deposited sediment by...
Authors
Alan Kasprak, Joel B. Sankey, Joshua Caster
By
Ecosystems Mission Area, Southwest Biological Science Center

Wildlife health capacity enhancement in Thailand through the World Organisation for Animal Health Twinning Program Wildlife health capacity enhancement in Thailand through the World Organisation for Animal Health Twinning Program

There is an increasing need for robust wildlife health programs that provide surveillance and management for diseases in wildlife and wild aquatic populations to manage associated risks. This paper illustrates the value of a systematic method to enhancing wildlife health programs. The U.S. Geological Survey and Mahidol University, Faculty of Veterinary Science, Thailand National Wildlife...
Authors
Sarin Suwanpakdee, Nareerat Sangkachai, Anuwat Wiratsudakul, Witthawat Wiriyarat, Walasinee Sakcamduang, Peerawat Wongluechai, Choenkwan Pabutta, Ladawan Sariya, Waruja Korkijthamkul, David S. Blehert, C. LeAnn White, Daniel P. Walsh, Craig Stephen, Parntep Ratanakorn, Jonathan M. Sleeman
By
Ecosystems Mission Area, Cooperative Research Units, National Wildlife Health Center
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