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It's in the Air: The Ecological Effects of Nitrogen Deposition in Rocky Mountain National Park

Encroaching development, overuse, and air- and waterborne contaminants from outside park boundaries are causing noticeable changes to water quality and ecosystem health and functioning. The Front Range metropolitan area from Fort Collins south to Colorado Springs includes 75 percent of Colorado's population and its most productive agricultural More...

  • Photo of lead investigator Dr. Jill Baron preparing to extract water from a soil lysimeter

Seabird Tissue Archival and Monitoring Project (STAMP)

This project is a joint effort for developing and testing protocols for collecting, processing, transporting, and storing seabird eggs collected at several Alaska Maritime National Wildlife Refuge (AMNWR) colonies. Seabird Tissue Archival and Monitoring Project (STAMP) is a long-term, cooperative project that is currently collecting, processing, More...

  • image of common (center) and thick-billed Murres

Assessment of Selenium and Atrazine Exposure and Effects to Wildlife at the North Platte National Wildlife Refuge, Scottsbluff, Nebraska

The primary goal of the proposed research is to evaluate selenium and atrazine exposure and effects to fish, amphibians, and waterfowl that utilize the Refuge. The following subordinate objectives will be met to investigate selenium exposure and effects to wildlife on the Refuge: 1.Measure selenium concentrations and total organic content in More...

  • map showing levels of usage of atrazine in the USA

Chemical Contamination of Hatchery Fish Feed

This project addresses the occurrence of metal and organochlorine contaminant residues in commercial feeds purchased by the U.S. Fish and Wildlife Service (FWS) hatcheries. Research into fish feed quality could benefit all hatchery and aquaculture operations and assist in the interpretation of the effects of pollution on wild fish. Results from More...

  • Salmon with broken back syndrome

Environmental contaminants in freshwater fish and their risk to piscivorous wildlife based on a national monitoring program

Organochlorine chemical residues and elemental concentrations were measured in piscivorous and benthivorous fish at 111 sites from large U.S. river basins. Potential contaminant sources such as urban and agricultural runoff, industrial discharges, mine drainage, and irrigation varied among the sampling sites. Our objectives were to provide summary More...

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Sources of Organochlorine Contaminants and Mercury in Seabirds from the Aleutian Archipelago of Alaska

The Aleutian archipelago of Alaska, which separates the North Pacific Ocean from the Bering Sea, supports a diverse and abundant community of resident and migratory seabirds, comprising over 26 species and 10 million birds. However, comparatively little data exist on sources of environmental contaminants for this community despite extensive More...

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Contaminant Biology Program: Databases

This web page lists databases related to contaminant research across government agencies and partnerships. Many of the links include access to documented trends in the occurrence of persistent toxic chemicals that may threaten fish and wildlife resources, summaries of the results from aquatic acute toxicity tests, Avian Incident Monitoring, More...

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