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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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Response of nutrient limitation to invasive fish suppression: How carcasses and analog pellets alter periphyton Response of nutrient limitation to invasive fish suppression: How carcasses and analog pellets alter periphyton
The native Yellowstone Cutthroat Trout (Oncorhynchus clarkii bouvieri Jordan and Gilbert, 1883) population in Yellowstone Lake, Yellowstone National Park, Wyoming, USA, is in decline because of competition from the introduced, invasive Lake Trout (Salvelinus namaycush Walbaum in Artedi, 1792). Gillnetting is used to suppress adult Lake Trout; however, methods are being developed to...
Authors
Dominique R. Lujan, Lusha M. Tronstad, Michelle A. Briggs, Lindsey K. Albertson, Hayley C. Glassic, Christopher S. Guy, Todd M Koel
Critical thermal maximum of stream fishes including distinct populations of Smallmouth Bass Critical thermal maximum of stream fishes including distinct populations of Smallmouth Bass
Understanding the thermal tolerances of stream fishes, including sport fishes, is important for assessing thermal stressors that are common across the landscape. Our study objectives were to determine the thermal tolerances of 17 stream fishes (15 species and 2 genetically distinct populations of juvenile Smallmouth Bass Micropterus dolomieu: the Neosho subspecies M. dolomieu velox and...
Authors
Shannon K. Brewer, R. Mollenhauer, J. Alexander, D.E. Moore
Diet analysis using generalized linear models derived from foraging processes using R package mvtweedie Diet analysis using generalized linear models derived from foraging processes using R package mvtweedie
Diet analysis integrates a wide variety of visual, chemical, and biological identification of prey. Samples are often treated as compositional data, where each prey is analyzed as a continuous percentage of the total. However, analyzing compositional data results in analytical challenges, for example, highly parameterized models or prior transformation of data. Here, we present a novel
Authors
James T. Thorson, Mayumi L. Arimitsu, Taal Levi, Gretchen Roffler
Using surrogate taxa to inform response methods for invasive Grass Carp in the Laurentian Great Lakes Using surrogate taxa to inform response methods for invasive Grass Carp in the Laurentian Great Lakes
Sampling method decisions are critical for the effective monitoring and management of fisheries. Deploying the most effective sampling methodologies is particularly important when responding to new invasive species, where early response efforts have the best chances for eradication. In the Laurentian Great Lakes, the invasive Grass Carp Ctenopharyngodon idella is sampled using boat...
Authors
Jason L. Fischer, Lucas Nathan, John Buszkiewicz, Julia Colm, D. Andrew R. Drake, Mark R. DuFour, Patrick Kocovsky, Dave Marson, Eric R. B. Smyth, Ryan Young, Kelly F. Robinson
Golden eagle occupancy surveys and monitoring strategy in coastal southern California, United States Golden eagle occupancy surveys and monitoring strategy in coastal southern California, United States
Golden eagles (Aquila chrysaetos) are of increasing conservation concern in western North America. Effective conservation measures for this wide-ranging, federally protected raptor species require monitoring frameworks that accommodate strong inference on the status of breeding populations across vast landscapes. We used a broad-scale sampling design to identify relationships between...
Authors
David Wiens, Peter H. Bloom, Melanie C. Madden, Patrick Kolar, Jeff A. Tracey, Robert N. Fisher
Implementation of the CCDC algorithm to produce the LCMAP Collection 1.0 annual land surface change product Implementation of the CCDC algorithm to produce the LCMAP Collection 1.0 annual land surface change product
The increasing availability of high-quality remote sensing data and advanced technologies have spurred land cover mapping to characterize land change from local to global scales. However, most land change datasets either span multiple decades at a local scale or cover limited time over a larger geographic extent. Here, we present a new land cover and land surface change dataset created...
Authors
George Z. Xian, Kelcy Smith, Danika F. Wellington, Josephine Horton, Qiang Zhou, Congcong Li, Roger F. Auch, Jesslyn F. Brown, Zhe Zhu, Ryan R. Reker
Long-term suspended sediment and particulate organic carbon yields from the Reynolds Creek Experimental Watershed and Critical Zone Observatory Long-term suspended sediment and particulate organic carbon yields from the Reynolds Creek Experimental Watershed and Critical Zone Observatory
Long-term (>20 y) suspended sediment (SS) and particulate organic carbon (POC) records are relatively rare and yet are necessary for understanding linkages between climate, erosion and carbon export. We estimated long-term (>23 y) SS and POC yields from four nested catchments that ranged from
Authors
Kayla L Glossner, Kathleen A. Lohse, Alison P. Appling, Zane K Cram, Erin Murray, Sarah E. Godsey, Steve Van Vactor, Emma P McCorkle, Mark Seyfried, Frederick B Pierson
Predator–prey interactions of terrestrial invertebrates are determined by predator body size and species identity Predator–prey interactions of terrestrial invertebrates are determined by predator body size and species identity
Predator–prey interactions shape ecosystems and can help maintain biodiversity. However, for many of the earth's most biodiverse and abundant organisms, including terrestrial arthropods, these interactions are difficult or impossible to observe directly with traditional approaches. Based on previous theory, it is likely that predator–prey interactions for these organisms are shaped by a
Authors
Ana Miller-ter Kuile, Austen Apigo, An Bui, Bartholomew DiFiore, Elizabeth S. Forbes, Michelle Lee, Devyn Orr, Daniel L Preston, Rachel Behm, Taylor A. Bogar, Jasmine N. Childress, Rodolfo Dirzo, Maggie Klope, Kevin D. Lafferty, John Mclaughlin, Marisa F Morse, Carina Motta, Kevin Park, Katherine A. Plummer, David A. Weber, Ronny Young, Hillary S. Young
Post-landing major element quantification using SuperCam laser induced breakdown spectroscopy Post-landing major element quantification using SuperCam laser induced breakdown spectroscopy
The SuperCam instrument on the Perseverance Mars 2020 rover uses a pulsed 1064 nm laser to ablate targets at a distance and conduct laser induced breakdown spectroscopy (LIBS) by analyzing the light from the resulting plasma. SuperCam LIBS spectra are preprocessed to remove ambient light, noise, and the continuum signal present in LIBS observations. Prior to quantification, spectra are...
Authors
Ryan B. Anderson, Olivier Forni, Agnes Cousin, Roger C. Wiens, Samuel M. Clegg, Jens Frydenvang, Travis S.J. Gabriel, Ann M. Ollila, Susanne Schröder, Olivier Beyssac, Erin Gibbons, David Vogt, Elise Clave, Jose-Antonio Manrique, Carey Legett, Paolo Pilleri, Raymond Newell, Joseph Sarrao, Sylvestre Maurice, Gorka Arana, Karim Benzerara, Pernelle Bernardi, Sylvain Bernard, Bruno Bousquet, Adrian J. Brown, Cesar Alvarez-Llamas, Baptiste Chide, Edward A. Cloutis, Jade Comellas, Stephanie Connell, Erwin Dehouck, Dorothea Delapp, Ari Essunfeld, Cecile Fabre, Thierry Fouchet, Cristina Garcia, Laura Garcia-Gomez, Patrick J. Gasda, Olivier Gasnault, Elisabeth M. Hausrath, Nina L. Lanza, Javier Laserna, Jeremie Lasue, Guillermo Lopez, Juan Manuel Madariaga, Lucia Mandon, Nicolas Mangold, Pierre-Yves Meslin, Marion Nachon, Anthony Nelson, Horton E. Newsom, Adriana Reyes-Newell, Scott Robinson, Fernando Rull, Shiv Sharma, Justin L. Simon, Pablo Sobron, Imanol Torre Fernandez, Arya Udry, Dawn Venhaus, Scott McLennan, Richard V. Morris, Bethany L. Ehlmann
Response to comment on “Mercury isotope fractionation by internal demethylation and biomineralization reactions in seabirds: Implications for environmental mercury science”: Principles and limitations of source tracing and process tracing with stable isot Response to comment on “Mercury isotope fractionation by internal demethylation and biomineralization reactions in seabirds: Implications for environmental mercury science”: Principles and limitations of source tracing and process tracing with stable isot
No abstract available.
Authors
Alain Manceau, Romain Brossier, Sarah E. Janssen, Brett Poulin
Factors affecting spatiotemporal variation in survival of endangered winter-run Chinook Salmon outmigrating from the Sacramento River Factors affecting spatiotemporal variation in survival of endangered winter-run Chinook Salmon outmigrating from the Sacramento River
Among four extant and declining Chinook salmon (Oncorhynchus tshawytscha) runs in California’s Central Valley, none have declined as precipitously as Sacramento River winter-run Chinook Salmon. In addition to habitat loss, migratory winter-run employ a life history strategy to reside and feed in stopover habitats on their way from freshwaters to the ocean. This life history strategy is...
Authors
Jason L. Hassrick, Arnold J. Ammann, Russell W. Perry, Sara N. John, Miles E. Daniels
Major reorganization of the Snake River modulated by passage of the Yellowstone Hotspot Major reorganization of the Snake River modulated by passage of the Yellowstone Hotspot
The details and mechanisms for Neogene river reorganization in the U.S. Pacific Northwest and northern Rocky Mountains have been debated for over a century with key implications for how tectonic and volcanic systems modulate topographic development. To evaluate paleo-drainage networks, we produced an expansive data set and provenance analysis of detrital zircon U-Pb ages from Miocene to
Authors
Lydia M. Staisch, Jim E. O'Connor, Charles M. Cannon, Christopher S. Holm-Denoma, Paul K. Link, John Lasher, Jeremy A. Alexander