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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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Dust in the Critical Zone: North American case studies Dust in the Critical Zone: North American case studies
The dust cycle facilitates the exchange of particles among Earth's major systems, enabling dust to traverse ecosystems, cross geographic boundaries, and even move uphill against the natural flow of gravity. Dust in the atmosphere is composed of a complex and ever-changing mixture that reflects the evolving human footprint on the landscape. The emission, transport, and deposition of dust...
Authors
Janice Brahney, Ruth C. Heindel, Thomas E. Gill, Gregory Carling, Juan M Gonzalez-Olalla, Jenny L. Hand, Derek V. Mallia, Jeffrey S. Munroe, Kevin Perry, Annie L. Putman, S. McKenzie Skiles, Brad R. Adams, Zachary T. Aanderud, Sarah M. Aarons, Daniela Aguirre, Karin Ardon-Dryer, Molly A. Blakowski, Jessie M. Creamean, Diego P. Fernandez, Hosein Foroutan, Cassandra J. Gaston, Maura Hahnenberger, Sebastian W. Hoch, Daniel K. Jones, Kerry E. Kelly, Otto I. Lang, Josh Lemonte, Richard L. Reynolds, Ramesh P. Singh, Mark Sweeney, Thorn K. Merrill
Implementation of controlled floods for sediment management on the Colorado River in Grand Canyon under aridification Implementation of controlled floods for sediment management on the Colorado River in Grand Canyon under aridification
In addition to supplying water for agriculture, cities, and industry, the Colorado River traverses the Colorado Plateau, including several of the most unique and valued National Parks and Recreation Areas in the United States. Although the water needs of these landscapes were not considered at the time water allocations were first negotiated, these needs were recognized in subsequent...
Authors
Paul E. Grams, David J. Topping, Gerard Lewis Salter, Katherine Anne Chapman, Robert B. Tusso, Erich R. Mueller
Boundary spanning increases knowledge and action on invasive species in a changing climate Boundary spanning increases knowledge and action on invasive species in a changing climate
Challenges associated with global change stressors on ecosystems have prompted calls to improve actionable science, including through boundary-spanning activities, which aim to build connections and communication between researchers and natural resource practitioners. By synthesizing and translating research and practitioner knowledge, boundary-spanning activities could support proactive...
Authors
Annette E. Evans, Eva M. Colberg, Jenica M. Allen, Evelyn M. Beaury, Carrie Jean Brown-Lima, Toni Lyn Morelli, Bethany A. Bradley
Coastal wetlands in the Anthropocene Coastal wetlands in the Anthropocene
We review the functioning and sustainability of coastal marshes and mangroves. Urbanized humans have a 7,000-year-old enduring relationship to coastal wetlands. Wetlands include marshes, salt flats, and saline and freshwater forests. Coastal wetlands occur in all climate zones but are most abundant in deltas. Mangroves are tropical, whereas marshes occur from tropical to boreal areas
Authors
John W. Day, Edward Anthony, Robert Costanza, Douglas Edmonds, Joel Gunn, Charles Hopkinson, Michael E. Mann, James Morris, Michael Osland, Tracy Quirk, Andre S. Rovai, John M Rybczyk, Thomas Spencer, Jessica Stephens, Jaia Syvitski, Robert R. Twilley, Jenneke Visser, John R. White
Archive of morphological data for the Coregonus artedi species complex of the Great Lakes, Lake Nipigon and Great Slave Lake Archive of morphological data for the Coregonus artedi species complex of the Great Lakes, Lake Nipigon and Great Slave Lake
This publication is a user guide for an archive of morphological data recorded by various authors from North American ciscoes of the Coregonus artedi species complex (subfamily Coregoninae). The archive is accessible from the Great Lakes Fishery Commission’s (GLFC) server, is open access, and contains data for the Laurentian Great Lakes; Lake Nipigon, Ontario; and Great Slave Lake...
Authors
Randy L. Eshenroder, Jonah Pollens-Dempsey, Thomas C. Pratt, Nicholas E. Mandrak, Thomas N. Todd, Timothy P. O’Brien, Scott M. Reid, Chris M. Olds, Whitney M. Woelmer, Yu-Chun Kao, Daniel L. Yule, Brian O’Malley, Paul Vecsei, Chippewas of Nawash Unceded First Nation, Little Traverse Bay Bands of Odawa Indians, Little River Band of Ottawa Indians, Andrew M. Muir
Adapting standardized trout monitoring to a changing climate for the upper Yellowstone River, Montana, USA Adapting standardized trout monitoring to a changing climate for the upper Yellowstone River, Montana, USA
Objective Long‐term standardized monitoring programs are fundamental to assessing how fish populations respond to anthropogenic stressors. Standardized monitoring programs may need to adopt new methods to adapt to rapid environmental changes that are associated with a changing climate. In the upper Yellowstone River, Montana, biologists have used a standardized, mark–recapture monitoring...
Authors
Michelle A. Briggs, Hayley Corrine Glassic, Christopher S. Guy, Scott T. Opitz, Jay J. Rotella, David A. Schmetterling
Onset of aftershocks: Constraints on the Rate-and-State model Onset of aftershocks: Constraints on the Rate-and-State model
Aftershock rates typically decay with time t after the mainshock according to the Omori–Utsu law, R(t)=K(c+t)−p, with parameters K, c, and p. The rate‐and‐state (RS) model, which is currently the most popular physics‐based seismicity model, also predicts an Omori–Utsu decay with p = 1 and a c‐value that depends on the size of the coseismic stress change. Because the mainshock‐induced...
Authors
Sebastian Hainzl, Morgan T. Page, Nicholas van der Elst
Understanding the role of recreational angling technology in angler expectations of catch, trip catch, and angler satisfaction Understanding the role of recreational angling technology in angler expectations of catch, trip catch, and angler satisfaction
Rapid technological advancement often receives a mix of criticism and welcome implementation. Fishing technologies, such as sonar, are believed to enable anglers to be more efficient and effective in their angling. There are concerns from anglers and managers of increased catch by technology users. We assessed the relationships between technology use—defined as the use of imaging...
Authors
Amanda M. Kerkhove, Ashley Trudeau, Olaf P. Jensen, Daniel A. Isermann, Patricia A. Dombrowski, Alexandra M. Latimer, Zachary S. Feiner
Bacteriological analysis of unionid hemolymph collected from freshwater mussel populations in the Pacific northwestern United States Bacteriological analysis of unionid hemolymph collected from freshwater mussel populations in the Pacific northwestern United States
Native freshwater mussel (Unionidae) mortality events have been occurring with increased frequency in recent decades, with few investigations into potential etiological agents. In the western United States, no surveys have been published regarding the bacteria associated with unionid mussels. Herein, we examine locations of known mussel mortality events in the Chehalis River (Washington)...
Authors
Eric Leis, Sara Dziki, Emilie Blevins, Diane L. Waller, Jordan Richard, Susan Knowles, Tony Goldberg
Taylorisms: The wit and witticisms of Professor William W. Taylor Taylorisms: The wit and witticisms of Professor William W. Taylor
No abstract available.
Authors
Abigail J. Lynch
Declines in brook trout abundance linked to atmospheric warming in Maryland, USA Declines in brook trout abundance linked to atmospheric warming in Maryland, USA
Salmonid fishes provide an important indicator of climate change given their reliance on cold water. We evaluated temporal changes in the density of stream-dwelling brook trout (Salvelinus fontinalis) from surveys conducted over a 36-year period (1988–2023) by the Maryland Department of Natural Resources in Eastern North America. Nonparametric trend analyses revealed decreasing densities...
Authors
Nathaniel P. Hitt, Karli M. Rogers, Zachary A. Kelly
Preliminary observations of the April 5th, 2024, Mw4.8 New Jersey earthquake Preliminary observations of the April 5th, 2024, Mw4.8 New Jersey earthquake
On 5 April 2024, 10:23 a.m. local time, a moment magnitude 4.8 earthquake struck Tewksbury Township, New Jersey, about 65 km west of New York City. Millions of people from Virginia to Maine and beyond felt the ground shaking, resulting in the largest number (>180,000) of U.S. Geological Survey (USGS) “Did You Feel It?” reports of any earthquake. A team deployed by the Geotechnical...
Authors
Oliver S. Boyd, William D. Barnhart, James Bourke, Martin C. Chapman, Paul S. Earle, Guo-chin Dino Huang, Jessica Ann Thompson Jobe, Won-Young Kim, Frederick Link, Mairi Maclean Litherland, Andrew Lloyd, Maureen Long, Sara K. McBride, Andrew J. Michael, Walter D. Mooney, Gregory Moutain, Sissy Nikolaou, Alexandros Savvaidas, Felix Waldhauser, Cecily J. Wolfe, Clara Yoon