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: 84793
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
Fisheries research and monitoring activities of the Lake Erie Biological Station, 2023 Fisheries research and monitoring activities of the Lake Erie Biological Station, 2023
This report presents biomass-based summaries of fish communities in western Lake Erie derived from USGS bottom trawl surveys conducted from 2013 to 2023. Analyses herein evaluated trends in total biomass, abundance of dominant predator and forage species, non-native species composition, biodiversity and community structure. Data from this effort can be explored interactively online and...
Authors
Mark Richard Dufour, Francesco Guzzo, Corbin David Hilling, Kevin R. Keretz, Richard Kraus, Richard Cole Oldham, James Roberts, Joseph Schmitt
Outmigration behavior and survival of juvenile Chinook salmon (Oncorhynchus tshawytscha) in response to deep drawdown of the Lookout Point Project, Middle Fork Willamette River, Oregon Outmigration behavior and survival of juvenile Chinook salmon (Oncorhynchus tshawytscha) in response to deep drawdown of the Lookout Point Project, Middle Fork Willamette River, Oregon
An acoustic telemetry study was conducted during August 2023–February 2024 to evaluate outmigration behavior and survival of juvenile Chinook salmon (Oncorhynchus tshawytscha) in the Middle Fork Willamette River, Oregon, during an experimental operation that was designed to facilitate downstream passage through two reservoirs and two dams. The experimental operation consisted of lowering...
Authors
Dalton J. Hance, Tobias J. Kock, Jake R. Kelley, Amy C. Hansen, Russell W. Perry, Scott D Fielding
California State Waters Map Series—Benthic habitat characterization in the region offshore Humboldt Bay, California California State Waters Map Series—Benthic habitat characterization in the region offshore Humboldt Bay, California
Coastal and Marine Ecological Classification Standard (CMECS) geoform, substrate, and biotic component geographic information system (GIS) products were developed for the California State Waters of northern California in the region offshore of Humboldt Bay. The study was motivated by interest in development of offshore wind-energy capacity and infrastructure in Federal waters offshore...
Authors
Guy R. Cochrane
Distribution, abundance, breeding activities, and habitat use of the Least Bell's Vireo at Marine Corps Base Camp Pendleton, California—2023 annual report Distribution, abundance, breeding activities, and habitat use of the Least Bell's Vireo at Marine Corps Base Camp Pendleton, California—2023 annual report
Executive Summary The purpose of this report is to provide the Marine Corps with an annual summary of abundance, breeding activity, demography, and habitat use of endangered Least Bell’s Vireos (Vireo bellii pusillus) at Marine Corps Base Camp Pendleton, California (MCBCP or Base). Surveys for the Least Bell's Vireo were completed at MCBCP between April 11 and July 20, 2023. Core survey...
Authors
Suellen Lynn, Barbara E. Kus
System characterization report on Vision-1 System characterization report on Vision-1
Executive Summary This report addresses system characterization of the Airbus Vision-1 satellite and is part of a series of system characterization reports produced and delivered by the U.S. Geological Survey Earth Resources Observation and Science Cal/Val Center of Excellence. These reports present and detail the methodology and procedures for characterization; present technical and...
Authors
James C. Vrabel, Paul Bresnahan, Aparajithan Sampath, Minsu Kim, Seonkyung Park, Jeff Clauson