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Ecosystems Mission Area

The USGS Ecosystems Mission Area provides science that directly benefits the health, safety, and prosperity of the American people by providing trusted and timely information to help address the Nation’s toughest management and conservation issues impacting public lands and the surrounding communities that benefit from them. 

News

Experts Gather at Lake Tahoe to Reimagine the Future of Recreational Fishing

Experts Gather at Lake Tahoe to Reimagine the Future of Recreational Fishing

NOROCK Research in Support of Native Amphibians

NOROCK Research in Support of Native Amphibians

Cycle of a Bird Band

Cycle of a Bird Band

Publications

Natomas basin giant gartersnake annual monitoring report 2024 Natomas basin giant gartersnake annual monitoring report 2024

The giant gartersnake (Thamnophis gigas) is a semi aquatic snake endemic to the Central Valley of California. After losing 95 percent of its historic wetland habitat (Frayer and others, 1989), giant gartersnakes became state and federally listed as a threatened species (California Fish and Game Commission, 1971; U.S. Fish and Wildlife Service 1993, 1999). Continued monitoring of current
Authors
Allison M. Nguyen, Jonathan P. Rose, Anna C. Jordan, Giancarlo R. Napolitano, Daniel Macias, Elliot J. Schoenig, Gabriel A. Reyes, Brian J. Halstead

Inland recreational fisheries harvest far exceeds reported inland harvest in the United States Inland recreational fisheries harvest far exceeds reported inland harvest in the United States

Recreational fisheries are important global contributors to food security, socio-cultural practices, and local and regional economies. However, inland recreational fisheries are often overlooked by policymakers due to a limited understanding of the magnitude of participation, harvest, and economic impact. Here, we used the U.S. Inland Creel and Angler Survey Catalog and catch and effort...
Authors
Matthew D. Robertson, Holly Susan Embke, Abigail Lynch, Stephen R. Midway, Craig Paukert

Evaluating reservoir passage and survival of juvenile Chinook Salmon to support reintroduction upstream of Shasta Dam, California Evaluating reservoir passage and survival of juvenile Chinook Salmon to support reintroduction upstream of Shasta Dam, California

Objective Juvenile Chinook Salmon Oncorhynchus tshawytscha that are released upstream of Shasta Reservoir migrate more than 35 km to reach Shasta Dam, although survival through this system is poorly understood. We conducted a reservoir-scale acoustic telemetry study to quantify downstream movement and survival under seasonally variable environmental conditions to inform decisions about...
Authors
Caitlin Louise Stockwell, Joseph Mitchell Morse, Mikaeli Elizabeth Dirling, Claire E. Couch, Cyril J. Michel, Jeremy J. Notch, Tobias J. Kock

Science

Polar Bear Research

Polar bears ( Ursus maritimus) are one of 4 marine mammal species managed by the U.S. Department of Interior. The USGS Alaska Science Center leads long–term research on polar bears to inform local, state, national and international policy makers regarding conservation of the species and its habitat. Our studies, ongoing since 1985, are focused on population dynamics, health and energetics...
Polar Bear Research

Polar Bear Research

Polar bears ( Ursus maritimus) are one of 4 marine mammal species managed by the U.S. Department of Interior. The USGS Alaska Science Center leads long–term research on polar bears to inform local, state, national and international policy makers regarding conservation of the species and its habitat. Our studies, ongoing since 1985, are focused on population dynamics, health and energetics...
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Terrestrial Mammal Research

Understanding the population dynamics, predator/prey relationships and habitat ecology of terrestrial mammals, such as caribou and muskoxen, is critical for the management of these species and their habitats in Alaska.
Terrestrial Mammal Research

Terrestrial Mammal Research

Understanding the population dynamics, predator/prey relationships and habitat ecology of terrestrial mammals, such as caribou and muskoxen, is critical for the management of these species and their habitats in Alaska.
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USGS Ecosystems Mission Area: Animal Welfare Assurance

USGS Ecosystems Mission Area: Animal Welfare Assurance

The Ecosystems Mission Area (EMA) provides support for the Institutional Animal Care and Use Committees (IACUCs) at EMA science centers across the nation.
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