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Cooperative Research Units

Established in 1935 at Iowa State University, our mission is our hallmark: work with University students to develop the conservation workforce, help decision-makers make complex conservation decisions, and to provide technical assistance between natural resource agencies and universities. We support 43 units located in 41 States, at 44 host universities. Our Program Office is in Reston, Virginia.

News

A novel method for estimating pathogen presence, prevalence, load, and dynamics at multiple scales

A novel method for estimating pathogen presence, prevalence, load, and dynamics at multiple scales

Shorebirds and Roads: How Human-altered Landscapes Influence Shorebird Movements in Alaska

Shorebirds and Roads: How Human-altered Landscapes Influence Shorebird Movements in Alaska

USGS EcoNews - Vol. 6 | Issue 1

Publications

Leveraging detection uncertainty to estimate Renibacterium salmoninarum infection status among multiple tissues and assays

Effective disease surveillance relies on accurate pathogen testing and robust prevalence estimates. Diagnostic specificity (DSp), the probability that an uninfected animal tests negative, is high when false positives are low. Diagnostic sensitivity (DSe) is the probability an infected animal tests positive; higher DSe means fewer false negatives. However, sensitivity and false negatives...
Authors
Tawni B.R. Firestone, Eric R. Fetherman, Kathryn P. Huyvaert, John D. Drennan, Rebecca E. Brock, Brooke Yeatts, Dana L. Winkelman

Long-term patterns in growth of White Sturgeon in the Sacramento-San Joaquin River basin, California.

Introduction: The Sacramento-San Joaquin River system (SSJ) of California includes both riverine, delta, and estuarine habitats and is among the most modified aquatic ecosystems in the United States. Water development projects in the system are associated with declines of many native species, including White Sturgeon Acipenser transmontanus.Methods: We used White Sturgeon pectoral fin...
Authors
Michael Quist, Shannon Blackburn, Marta Ulaski, Zachary Jackson

Modeling lamprey distribution using flow, geomorphology, and elevation in a terminal lake system

ObjectiveLampreys are an ecologically important group of fishes. Several species are imperiled and lack key distribution and habitat data. The terminal Goose Lake Basin, U.S.A. is home to two such species, the Goose Lake Lamprey, Entosphenus sp. (formally undescribed), and the Pit-Klamath Brook Lamprey, E. lethophagus. Species distribution models (SDMs) are useful for identifying key...
Authors
Jacob C. Dickey, Benjamin J. Clemens, Michael Dumelle, Melanie J. Davis

Science

USGS Ecosystems Science for Food and Water Security

USGS science developed by the Ecosystems Mission Area helps ensure safe and abundant domestic food and water supplies, ensuring all Americans access to livelihoods and traditions that connect generations with each other and the outdoors and strengthen America’s self-reliance. USGS science is used by decision makers at all levels to understand how the quality of America’s food supply is directly...
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USGS Ecosystems Science for Food and Water Security

USGS science developed by the Ecosystems Mission Area helps ensure safe and abundant domestic food and water supplies, ensuring all Americans access to livelihoods and traditions that connect generations with each other and the outdoors and strengthen America’s self-reliance. USGS science is used by decision makers at all levels to understand how the quality of America’s food supply is directly...
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USGS Ecosystems Science in Support of Economic Growth

Science provided by the USGS Ecosystems Mission Area helps boost America’s economy by providing practical tools to implement cost-effective management and development strategies that supports the Nation’s economic growth and protects our natural heritage.
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USGS Ecosystems Science in Support of Economic Growth

Science provided by the USGS Ecosystems Mission Area helps boost America’s economy by providing practical tools to implement cost-effective management and development strategies that supports the Nation’s economic growth and protects our natural heritage.
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Deep Dive: Sustaining the Rich Economic and Recreational Benefits of the Prairie Pothole Region

The wetlands of the Prairie Pothole Region provide essential benefits to communities and are a premier waterfowl breeding ground. Explore how CASC science is informing the strategic restoration and management of the Prairie Pothole Region in the face of climate change.
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Deep Dive: Sustaining the Rich Economic and Recreational Benefits of the Prairie Pothole Region

The wetlands of the Prairie Pothole Region provide essential benefits to communities and are a premier waterfowl breeding ground. Explore how CASC science is informing the strategic restoration and management of the Prairie Pothole Region in the face of climate change.
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Multimedia

A researcher is holding a steelhead
A researcher is holding a steelhead
A researcher is holding a steelhead
Two researchers are tagging a pronghorn fawn
Two researchers are tagging a pronghorn fawn
Two researchers are tagging a pronghorn fawn
Researcher is holding a largemouth bass
Researcher is holding a largemouth bass
Researcher is holding a largemouth bass
Researchers in a boat in Apache Lake, Arizona
Researchers in a boat in Apache Lake, Arizona
Researchers in a boat in Apache Lake, Arizona
Mapping Deep Fork River, Oklahoma
Mapping Deep Fork River, Oklahoma
Mapping Deep Fork River, Oklahoma
Freshwater fish in a net
Freshwater fish (yellow perch, bluegill sunfish, pumpkinseed sunfish, largemouth bass) in a net
Freshwater fish (yellow perch, bluegill sunfish, pumpkinseed sunfish, largemouth bass) in a net
Chad Teal is working in the fish lab
Chad Teal is working in the fish lab
Chad Teal is working in the fish lab
Bass eating fish
Bass eating fish
Bass eating fish
Researcher surveying for wolves in Idaho
Researcher surveying for wolves in Idaho
Researcher surveying for wolves in Idaho
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