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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

Species on the Move: Northeast CASC Researchers Discuss Species Range Shift in Recent Podcast Episode

Species on the Move: Northeast CASC Researchers Discuss Species Range Shift in Recent Podcast Episode

Study Reveals That Inland Recreational Fishery Harvest is Quite the Catch

Study Reveals That Inland Recreational Fishery Harvest is Quite the Catch

USGS Expertise Informs Design and Construction of New Eel Ladder at Maryland’s Eden Mill Dam

USGS Expertise Informs Design and Construction of New Eel Ladder at Maryland’s Eden Mill Dam

Publications

Distribution, abundance, and breeding activities of Southwestern Willow Flycatchers (Empidonax traillii extimus) on the San Dieguito River and upper San Luis Rey River, San Diego County, California—2025 data summary Distribution, abundance, and breeding activities of Southwestern Willow Flycatchers (Empidonax traillii extimus) on the San Dieguito River and upper San Luis Rey River, San Diego County, California—2025 data summary

Executive Summary We surveyed for Southwestern Willow Flycatchers (Empidonax traillii extimus; flycatcher) at the San Dieguito River and the upper San Luis Rey River in 2025. Surveys were completed at five locations: one along the San Dieguito River (San Dieguito [SD]), which was last surveyed in 2016, and four along the upper San Luis Rey River, including three downstream from Lake...
Authors
Scarlett L. Howell, Barbara E. Kus

Open water control of invasive mussels using benthic mats—Part 1, short-term infusion of carbon dioxide under a mat Open water control of invasive mussels using benthic mats—Part 1, short-term infusion of carbon dioxide under a mat

This study compared the efficacy of a benthic mat alone with carbon dioxide infusion under a mat for killing Dreissena polymorpha (Pallas, 1771) (zebra mussel). Three sites were selected in Loon Lake, Sleeping Bear Dunes National Lakeshore, Benzie County, Michigan, for replication of reference, benthic mat, and carbon dioxide mat treatments. Within a site, three 4-meter (m) x 4-m plots...
Authors
Diane L. Waller, Richard A. Erickson, Jeremy K. Wise, Matthew J. Meulemans, Brad E.C. Morris, Todd J. Severson, Matthew T. Barbour

Black abalone surveys at Naval Base Ventura County, San Nicolas Island, California—2023 annual report Black abalone surveys at Naval Base Ventura County, San Nicolas Island, California—2023 annual report

The U.S. Geological Survey monitors a suite of intertidal black abalone (Haliotis cracherodii) sites at San Nicolas Island, California, in cooperation with the U.S. Navy, which owns the island. The nine rocky intertidal sites were established in 1980 to study the potential effect of translocated sea otters on the intertidal black abalone population at the island. The sites were monitored...
Authors
Michael C. Kenner, Julie L. Yee

Science

North Pacific Pelagic Seabird Database

The North Pacific Pelagic Seabird Database (NPPSD) contains survey transect data designed and conducted by numerous partners primarily to census seabirds at sea. The NPPSD includes more than 486,000 transect segments and includes observations of over 20 million birds of 258 species collected over the span of 50 years (from 1973 to 2022).
North Pacific Pelagic Seabird Database

North Pacific Pelagic Seabird Database

The North Pacific Pelagic Seabird Database (NPPSD) contains survey transect data designed and conducted by numerous partners primarily to census seabirds at sea. The NPPSD includes more than 486,000 transect segments and includes observations of over 20 million birds of 258 species collected over the span of 50 years (from 1973 to 2022).
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Harmful Algal Bloom Toxins in Alaska Seabirds

Elevated ocean temperatures are linked to the development of harmful algal blooms (HABs). Toxins from these blooms may pose health threats to marine organisms, including seabirds. Since 2015, the USGS has worked with a variety of stakeholders to develop testing methods and research projects to better understand the geographic extent, timing and impacts of algal toxins in Alaska marine ecosystems...
Harmful Algal Bloom Toxins in Alaska Seabirds

Harmful Algal Bloom Toxins in Alaska Seabirds

Elevated ocean temperatures are linked to the development of harmful algal blooms (HABs). Toxins from these blooms may pose health threats to marine organisms, including seabirds. Since 2015, the USGS has worked with a variety of stakeholders to develop testing methods and research projects to better understand the geographic extent, timing and impacts of algal toxins in Alaska marine ecosystems...
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Seabirds and Forage Fish Ecology

Alaska's coastal and offshore waters provide foraging habitat for an estimated 100 million birds comprising more than 90 different species; from loons and seaducks that nest inland, to petrels and puffins that breed on islands off shore. All these birds depend on the sea to provide a wide variety of food types— from clams, crabs and urchins nearshore— to krill, forage fish, and squid offshore. The...
Seabirds and Forage Fish Ecology

Seabirds and Forage Fish Ecology

Alaska's coastal and offshore waters provide foraging habitat for an estimated 100 million birds comprising more than 90 different species; from loons and seaducks that nest inland, to petrels and puffins that breed on islands off shore. All these birds depend on the sea to provide a wide variety of food types— from clams, crabs and urchins nearshore— to krill, forage fish, and squid offshore. The...
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