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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse more than 65,000 articles authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
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Next-generation lampricides: A three-stage process to develop improved control tools for invasive sea lamprey Next-generation lampricides: A three-stage process to develop improved control tools for invasive sea lamprey
Successful integrated management of the invasive predatory sea lamprey (Petromyzon marinus) in the Laurentian Great Lakes of North America is owed largely to the long history of beneficial use of two lampricides: 3-trifluoromethyl-4-nitrophenol (TFM) and 2′,5-dichloro-4′-nitrosalicylanilide (niclosamide). Ensuring continued successful sea lamprey control necessitates consideration of...
Authors
Steve Lantz, Bob Adair, Jon Amberg, Roger A. Bergstedt, Michael A. Boogaard, Ugo Bussy, Margaret F. Docker, Erin S. Dunlop, Alex Gonzalez, Terrance Hubert, Michael J. Siefkes, Paul Sullivan, Steve Whyard, Michael P. Wilkie, Bradley Young, Andrew M. Muir
Temperature-based modeling of incubation period to protect loggerhead hatchlings on an urban beach in Northwest Florida Temperature-based modeling of incubation period to protect loggerhead hatchlings on an urban beach in Northwest Florida
Sea turtle hatchlings face many natural and anthropogenic threats during their short journey to the water after emerging from nests. Reducing hatchling mortality is critical to population recovery of imperiled sea turtle species; however, protecting hatchlings is particularly challenging on beaches degraded by human development and disturbances, including artificial lighting. Managers...
Authors
Kennard P. Watson, Margaret Lamont
Tracking secondary lahar flow paths and characterizing pulses and surges using infrasound array networks at Volcán de Fuego, Guatemala Tracking secondary lahar flow paths and characterizing pulses and surges using infrasound array networks at Volcán de Fuego, Guatemala
Lahars are one of the greatest hazards at many volcanoes, including Volcán de Fuego (Guatemala). On 1 December 2018 at 8:00pm local Guatemala time (2:00:00 UTC), an hour-long lahar event was detected at Volcán de Fuego by two permanent seismo-acoustic stations along the Las Lajas channel on the southeast side. To establish the timing, duration, and speed of the lahar, infrasound array...
Authors
Ashley Bosa, Jeffery Johnson, Silvio DeAngelis, John J. Lyons, Amilcar Roca, Jacob F. Anderson, Armando Pineda
Establishing the foundation for the global observing system for marine life Establishing the foundation for the global observing system for marine life
Maintaining healthy, productive ecosystems in the face of pervasive and accelerating human impacts including climate change requires globally coordinated and sustained observations of marine biodiversity. Global coordination is predicated on an understanding of the scope and capacity of existing monitoring programs, and the extent to which they use standardized, interoperable practices...
Authors
Erin V. Satterthwaite, Nicholas J. Bax, Patricia Miloslavich, Lavenia Ratnarajah, Gabrielle Canonico, Daniel Dunn, Samantha E. Simmons, Roxanne J. Carini, Karen Evans, Valerie Allain, Ward Appeltans, Sonia Batten, Lisandro Benedetti-Cecchi, Anthony T. F. Bernard, R. Sky Bristol, Abigail Benson, Pier Luigi Buttigieg, Leopoldo Cavaleri Gerhardinger, Sanae Chiba, Tammy E. Davies, J. Emmett Duffy, Alfredo Giron-Nava, Astrid J. Hsu, Alexandra C. Kraberg, Raphael M. Kudela, Dan Lear, Enrique Montes, Frank Muller-Karger, Todd D. O’Brien, David Obura, Pieter Provoost, Sara Pruckner, Lisa-Maria Rebelo, Elizabeth R. Selig, Olav Sigurd Kjesbu, Craig Starger, Rick D. Stuart-Smith, Marjo Vierros, John S. Waller, Lauren V. Weatherdon, Tristan Wellman, Anna Zivian
Antimicrobial resistance: Wildlife as indicators of anthropogenic environmental contamination across space and through time Antimicrobial resistance: Wildlife as indicators of anthropogenic environmental contamination across space and through time
Prior assessments support wildlife as indicators of anthropogenically influenced antimicrobial resistance across the landscape. A ground-breaking new study suggests that wildlife may also provide information on antimicrobial resistance in the environment through time.
Authors
Andrew M. Ramey
Lagged wetland CH4 flux response in a historically wet year Lagged wetland CH4 flux response in a historically wet year
While a stimulating effect of plant primary productivity on soil carbon dioxide (CO2) emissions has been well documented, links between gross primary productivity (GPP) and wetland methane (CH4) emissions are less well investigated. Determination of the influence of primary productivity on wetland CH4 emissions (FCH4) is complicated by confounding influences of water table level and...
Authors
Jessica Turner, Ankur R. Desai, Jonathan Thom, Kimberly Wickland
Improving the usability of Galileo and Voyager images of Jupiter’s moon, Europa Improving the usability of Galileo and Voyager images of Jupiter’s moon, Europa
NASA's Voyager 1, Voyager 2, and Galileo spacecraft acquired hundreds of images of Jupiter's moon Europa. These images provide the only moderate- to high-resolution views of the moon's surface and are therefore a critical resource for scientific analysis and future mission planning. Unfortunately, uncertain knowledge of the spacecraft's position and pointing during image acquisition...
Authors
Michael T. Bland, Lynn A. Weller, Brent A. Archinal, Ethan Smith, Benjamin H Wheeler
How will baseflow respond to climate change in the Upper Colorado River Basin? How will baseflow respond to climate change in the Upper Colorado River Basin?
Baseflow is critical to sustaining streamflow in the Upper Colorado River Basin. Therefore, effective water resources management requires estimates of baseflow response to climatic changes. This study provides the first estimates of projected baseflow changes from historical (1984 – 2012) to thirty-year periods centered around 2030, 2050, and 2080 under warm/wet, median, and hot/dry...
Authors
Olivia L. Miller, Matthew P. Miller, Patrick C. Longley, Jay R. Alder, Lindsay A. Bearup, Tom Pruitt, Daniel K. Jones, Annie L. Putman, Christine Rumsey, Tim S. McKinney
Increased growth rates of stream salamanders following forest harvesting Increased growth rates of stream salamanders following forest harvesting
Timber harvesting can influence headwater streams by altering stream productivity, with cascading effects on the food web and predators within, including stream salamanders. Although studies have examined shifts in salamander occupancy or abundance following timber harvest, few examine sublethal effects such as changes in growth and demography. To examine the effect of upland harvesting...
Authors
Jacquelyn C. Guzy, Brian J. Halstead, Kelly M. Halloran, Jessica A. Homyack, John D. Willson
Ontogeny of eDNA shedding during early development in Chinook Salmon (Oncorhynchus tshawytscha) Ontogeny of eDNA shedding during early development in Chinook Salmon (Oncorhynchus tshawytscha)
Knowledge of the timing of major life history events in aquatic species is important for informing conservation and resource management planning. Accordingly, surveys of environmental DNA (eDNA) have been performed to determine the efficacy of eDNA for providing information on life history events, primarily focusing on the timing of events associated with spawning, and these studies have...
Authors
Carl O. Ostberg, Dorothy M. Chase
Surface-water/groundwater boundaries affect seasonal PFAS concentrations and PFAA precursor transformations Surface-water/groundwater boundaries affect seasonal PFAS concentrations and PFAA precursor transformations
Elevated concentrations of per- and polyfluoroalkyl substances (PFAS) in drinking-water supplies are a major concern for human health. It is therefore essential to understand factors that affect PFAS concentrations in surface water and groundwater and the transformation of perfluoroalkyl acid (PFAA) precursors that degrade into terminal compounds. Surface-water/groundwater exchange can...
Authors
Andrea K. Tokranov, Denis R. LeBlanc, Heidi M. Pickard, Bridger J. Ruyle, Larry B. Barber, Robert B. Hull, Elsie M. Sunderland, Chad D. Vecitis
Evaluation of satellite imagery for monitoring Pacific walruses at a large coastal haulout Evaluation of satellite imagery for monitoring Pacific walruses at a large coastal haulout
Pacific walruses (Odobenus rosmarus divergens) are using coastal haulouts in the Chukchi Sea more often and in larger numbers to rest between foraging bouts in late summer and autumn in recent years, because climate warming has reduced availability of sea ice that historically had provided resting platforms near their preferred benthic feeding grounds. With greater numbers of walruses...
Authors
Anthony S. Fischbach, David C. Douglas