Reports
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse more than 82,000 reports authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
Filter Total Items: 84719
Investigating the influence of forest disturbance on grizzly bear habitat ecology and fitness in the Northern Continental Divide Ecosystem Investigating the influence of forest disturbance on grizzly bear habitat ecology and fitness in the Northern Continental Divide Ecosystem
No abstract available.
Authors
Milan V. Vinks, Sarah Nelson Sells, Cecily M. Costello
A regional synthesis of climate data to inform the 2025 State Wildlife Action Plans in the Northeast U.S. A regional synthesis of climate data to inform the 2025 State Wildlife Action Plans in the Northeast U.S.
The State Wildlife Action Plans (SWAPs) are proactive planning documents, known as “comprehensive wildlife conservation strategies,” that assess the health of each state’s wildlife and habitats, identify current management and conservation challenges, and outline needed actions to conserve natural resources over the long term. SWAPs are revised every 10 years, with the last revision in...
Authors
Michelle Staudinger, Ambarish Karmalkar, Karen Terwilliger, Kevin Burgio, Alice Lubeck, Hanusia Higgins, Tracy Rice, Toni Lyn Morelli, Anthony D’Amato
A metapopulation strategy to support long term conservation of genetic diversity in Department of the Interior bison A metapopulation strategy to support long term conservation of genetic diversity in Department of the Interior bison
Once numbering in the tens of millions, plains bison (Bison bison bison) were nearly driven to extinction with only a few hundred individuals remaining by the late 19th century. Plains bison have since recovered to approximately 20,000 animals managed in conservation herds throughout North America, yet substantial challenges to their recovery remain. The Department of the Interior (DOI)...
Authors
Sara J. Oyler-McCance, Lee C. Jones, Blake McCann, Shawna J Zimmerman, Kathryn A. Schoenecker, Paul Santavy, Brendan J Moynahan
Climate vulnerability assessment of Oregon hatchery programs Climate vulnerability assessment of Oregon hatchery programs
The goal of this project was to assess the vulnerability to climate change impacts for a sample set of hatchery programs representing different geographic areas and primary anadromous species raised in state-managed Oregon hatcheries (Summary Figure 1). Freshwater and marine ecosystem processes can significantly influence salmon and steelhead survival, and understanding how these factors...
Authors
Hannah Barrett, Melanie J. Davis
Restoration monitoring metric framework: Integrating innovative remote-sensing technologies: Comparisons between field and remotely sensed vegetation surveys of restored forested and grassland sites in Ohio Restoration monitoring metric framework: Integrating innovative remote-sensing technologies: Comparisons between field and remotely sensed vegetation surveys of restored forested and grassland sites in Ohio
Restoration monitoring is generally perceived as costly and time-consuming, yet the concept of universal restoration monitoring metrics is trending for evaluation of restoration performance across spatial scales, project boundaries, and jurisdictions. Natural Resource Damage Assessment and Restoration (NRDAR) practitioners seek to restore natural resources injured by oil spills or...
Authors
Heather Theel, Molly Reif, Safra Altman, Christina Saltus, Nathan R. Beane, Samuel S. Jackson, Scott Bourne, Jennifer Laird, Shea Hammond, Kenneth Matheson, Thomas Berry, Jo Ellen Hinck, Keith Grabner, Esther D. Stroh, Robin L. Tillitt, Kristin Skrabis
Scope, setting, and purpose of the Colorado Front Range climate change vulnerability assessment for national forests Scope, setting, and purpose of the Colorado Front Range climate change vulnerability assessment for national forests
No abstract available.
Authors
Brice Hanberry, T Timberlake, N.A. Clark, Brian W. Miller, C. D. Peterson
International Ocean Discovery Program Expedition 389 preliminary report: Hawaiian drowned reefs International Ocean Discovery Program Expedition 389 preliminary report: Hawaiian drowned reefs
Our understanding of the mechanisms controlling eustatic sea level and global climate changes has been hampered by a lack of appropriate fossil coral records over the last 500 ky, particularly into and out of the glacial periods. This problem was addressed by International Ocean Discovery Program Expedition 389 by drilling a unique succession of Hawaiian drowned coral reefs now at 110...
Authors
Jody M. Webster, Ana Christina Ravelo, Hannah L.J. Grant, Margaret Stewart, M. Rydzy, Erwan Le Ber, Nicola Allison, Brian Boston, Juan Carlos Braga, Logan Brenner, Xuefei Chen, Peter Chutcharavan, Andrea Dutton, Thomas Felis, Naoto Fukuyo, Eberhard Gischler, Sahra Greve, Amy Hagen, Youri Hamon, Ed Hathorne, Marc Humblet, Stephan Jorry, Pankaj Khanna, Helen V. McGregor, Richard A. Mortlock, Ulrike Prange, Theresa Nohl, Donald Potts, Ana Prohaska, Nancy G. Prouty, Willem Renema, Kenna Rubin, Hildegard Westphal, Yusuke Yokoyama, Marley Parker
Chapter 6: Climate change, wildlife, and wildlife habitats in the Oregon Coast Range Chapter 6: Climate change, wildlife, and wildlife habitats in the Oregon Coast Range
Climate change is likely to have profound effects on wildlife species within the Oregon Coast Adaptation Partnership (OCAP) assessment area, although the direction and magnitude of effects are likely to vary across species. Increased mean and extreme temperatures, especially during summer, may cause shifts in plant and animal species ranges, reduce habitat for some temperature-sensitive...
Authors
Todd M. Wilson, Lindsey Thurman, Erik A. Beever, Peter H Singleton, Deanna H. Olson, Deanna Williams, Douglas A. Glavich
Defining sediment handling practices to limit negative impacts to larval lampreys Defining sediment handling practices to limit negative impacts to larval lampreys
Sediment manipulation activities such as dredging and restoration efforts (e.g., culvert install/repair) may disturb habitats where larval lampreys live burrowed in stream sediments. Sediment added on top of larval lamprey burrowing areas results in ‘overburden’, which poses risks of mortality from respiratory distress, reduced movement, and crushing injuries or may have sublethal...
Authors
Theresa L. Liedtke, Joe Skalicky, Lisa K. Weiland, Julie Harris, Ann E. Gray, Ralph Lampman, Joy Wade
Gulf of Mexico Marine Assessment Program for Protected Species (GOMMAPPS): Seabird surveys in the northern Gulf of Mexico, 2017-2020 Gulf of Mexico Marine Assessment Program for Protected Species (GOMMAPPS): Seabird surveys in the northern Gulf of Mexico, 2017-2020
No abstract available.
Authors
Jeffrey S. Gleason, Allison Sussman, Kayla L. Davis, J. Christopher Haney, Kathy M. Hixson, Patrick G.R. Jodice, James E. Lyons, Pamela E. Michael, Yvan G. Satgé, Emily D. Silverman, Elise F. Zipkin, R. Randy Wilson
Evaluating behavioral responses of spawning-phase Walleyes to odors of rivers and other Walleyes Evaluating behavioral responses of spawning-phase Walleyes to odors of rivers and other Walleyes
Many fish species show a remarkable ability to home to streams for spawning and fishery managers have applied that knowledge to restore or rehabilitate populations of some species. Walleye Sander vitreus show strong homing tendencies and the ability to select their natal river from other streams. The role of olfactory cues has been hypothesized but never tested in Walleye and many...
Authors
Tyler Buchinger, Troy Zorn, Nicholas S. Johnson, Weiming Li