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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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Rapid seismic and infrasound assessment of large landslides: A case study from Denali National Park and Preserve (Alaska) Rapid seismic and infrasound assessment of large landslides: A case study from Denali National Park and Preserve (Alaska)
Large, rapid landslides are a global hazard that can occur in remote, mountainous areas. Eyewitness reports of landslides and satellite imagery can often be limited or delayed, particularly during inclement weather. However, landslide-generated seismic and infrasound (low-frequency atmospheric sound) waves can be remotely detected in near real-time. This information can significantly...
Authors
Liam Toney, Michael E. West, Ezgi Karasözen, Denny M Capps, Elaine A. Collins, Kate E. Allstadt, Jana Pursley, Heather McFarlin, Anne Mangeney, David Fee, Dennis M. Staley, Matthew M. Haney, John J. Lyons, John Bellini
Population trends of dabbling ducks wintering in the alluvial valleys of Arkansas and Mississippi Population trends of dabbling ducks wintering in the alluvial valleys of Arkansas and Mississippi
Population abundances, distributions, and compositions across a diversity of taxa are changing, partly as a consequence of human-induced global modifications. Although linking population fluctuations to anthropogenic-induced alterations can be challenging, it is increasingly clear that long-term monitoring is critical to understanding changing populations. For waterfowl, concerns over...
Authors
Melanie R. Boudreau, Houston Havens, Brett Leach, Luke W. Naylor, James T. Callicutt, Aaron T. Pearse, J. Brian Davis
Decadal shifts in groundwater age detected by environmental tracers across California, USA Decadal shifts in groundwater age detected by environmental tracers across California, USA
Groundwater age offers important insight into recharge, storage, and contamination risk. Although models predict age changes can be driven by pumping and climate variability, direct observational evidence remains limited. Here, we analyzed paired environmental tracer suites (tritium, carbon-14, and tritiogenic helium-3) collected a decade apart from 268 wells across California to assess...
Authors
Bryant C. Jurgens, Zeno F. Levy
The collective application of shorebird tracking data to conservation The collective application of shorebird tracking data to conservation
Addressing urgent conservation issues, such as the drastic declines of North American migratory birds, requires creative, evidence-based, efficient, and collaborative approaches. The abundance of over 50% of monitored North American shorebird populations has declined by over 50% since 1980. To address these declines, we developed a partnership of scientists and practitioners called the...
Authors
Autumn-Lynn Harrison, Candace Stenzel, Alexandra Anderson, Jessica Howell, Richard B. Lanctot, Marley Aikens, Joaquín Aldabe, Liam A. Berigan, Joël Bêty, Erik Blomberg, Juliana Bosi de Almeida, Andy J. Boyce, David W. Bradley, Stephen C. Brown, Jay D. Carlisle, Edward Cheskey, Katherine Christie, Sylvain Christin, Rob Clay, Ashley A. Dayer, Jill L. Deppe, Willow B. English, Scott A. Flemming, Olivier Gilg, Christine Gilroy, Susan Heath, Jason M. Hill, J. Mark Hipfner, James A. Johnson, Luanne Johnson, Bart Kempenaers, Paul Knaga, Eunbi Kwon, Benjamin J. Lagassé, Jean-François Lamarre, Christopher Latty, Don-Jean Léandri-Breton, Nicolas Lecomte, Pam Loring, Laura Anne McDuffie, Rebecca L McGuire, Scott Moorhead, Juan G. Navedo, David Newstead, Erica Nol, Alina Olalla-Kerstupp, Bridget Olson, Elizabeth Olson, Julie Paquet, Allison K. Pierce, Jennie Rausch, Kevin Regan, Matthew E. Reiter, Amber M. Roth, Mike Russell, Daniel R. Ruthrauff, Sarah T. Saalfeld, Amy L. Scarpignato, Shiloh Schulte, Nathan R. Senner, Joseph A.M. Smith, Paul A. Smith, Zach Spector, Kelly Srigley Werner, Michelle L. Stantial, Audrey R. Taylor, T. Lee Tibbitts, Mihai Valcu, Nils Warnock, Walter Wehtje, Brad Winn, Michael B. Wunder
Sources and streambed storage of soft sediment and sediment-bound phosphorus in an agricultural Great Lakes tributary Sources and streambed storage of soft sediment and sediment-bound phosphorus in an agricultural Great Lakes tributary
The East River, an agricultural tributary to the Lower Fox River and Lake Michigan in Wisconsin, USA, has excessive phosphorus (P) and suspended-sediment loads that contribute to downstream eutrophication and habitat-related impairments. Spatial variations and connectivity in the sources and streambed storage of soft, fine-grained (silt and clay) sediment and related sediment-bound P...
Authors
Heidi Mae Broerman, James D. Blount, Faith Fitzpatrick, Tanja N. Williamson, Rebecca Kreiling, Isaac James Mevis, Matthew J. Komiskey
Quantitative microbial risk assessment with microbial source tracking for enteric pathogens in southwest Wisconsin private wells Quantitative microbial risk assessment with microbial source tracking for enteric pathogens in southwest Wisconsin private wells
Private wells supply drinking water for many households, and their contamination by fecal microbes presents a risk of acute gastrointestinal illness (AGI). Risk is thought to vary by contaminating fecal source, but specific associations with fecal source are unknown for most private wells in the United States. This study characterizes AGI risk in Grant, Iowa, and Lafayette counties in...
Authors
Tucker R. Burch, Joel P. Stokdyk, Joe Heffron, Sarah A. Opelt, Aaron D. Firnstahl
Net CO2 emissions from dry inland waters persist in the presence of vegetation Net CO2 emissions from dry inland waters persist in the presence of vegetation
Many inland waters are shrinking due to shifts in climate and water diversion for human uses. As they dry out, their exposed sediments emit large amounts of carbon dioxide (CO2) to the atmosphere. However, current global estimates of CO2 emissions from dry inland waters are derived exclusively from bare sediment dark-chamber measurements that do not account for the colonization of...
Authors
K. Sharma, Soren Brothers, S. Bernal, Núria Catalán, P. Keller, M. Koschorreck, S. Kosten, C. Leigh, D. von Schiller, A. Pastor, A. Larrañaga, A. Ari, A. Camacho-Santamans, A. Grinham, A. Lupon, A. Linkhorst, A. Elosegi, B. Obrador, B. D. Eyre, C. Trochine, C. C. Muniz, C. Feijoo, C. Duvert, E. Moreno-Ostos, E. Jacqueline Garcia, E. S. Oliveria, F. Cuassolo, H. R. Fernandez, J. Yeo, J. Oakes, J. R. Paranaíba, J. Pegg, J. Anselmo, J. J. Montes-Perez, L. van den Heuvel, L. Ran, L. L. Wilkinson, L. Gomez-Gener, M. Arroita, M. Shanafield, M. L. Gultemirian, M. I. Arce, M. Cobo, M. M. Sanchez-Montoya, N. Barros, N. Wells, N. Karakaya, P. Erturk Ari, Q. Struik, R. Aben, R. Rimas, S. Kumar, Sheel Bansal, S. Sarkar, S. Rodriguez-Gomez, T. Huang, T. Silverthorn, T. Datry, V. Diaz Villanueva, R. Marce
Insights into Mountain Pass carbonatite formation from in-situ sulfur isotopes and geochemistry of sulfate and sulfide minerals Insights into Mountain Pass carbonatite formation from in-situ sulfur isotopes and geochemistry of sulfate and sulfide minerals
The Mountain Pass carbonatite stock hosts a world-class rare earth element deposit and may be classified as a carbonate-sulfate igneous rock, as it contains on average > 50 volume percent carbonate minerals and 20 to 30 volume percent sulfate minerals. The sulfates range in composition from barite to celestine and locally occur with sparse sulfide minerals. We investigate the origin of...
Authors
Erin Kay Benson, Kathryn E. Watts, Michael J. Pribil, Jay M. Thompson, Heather A. Lowers
Utilization of multiple geochronology techniques to constrain the age of laterization and mineralization of the world-class Mount Weld rare earth element deposit, Western Australia Utilization of multiple geochronology techniques to constrain the age of laterization and mineralization of the world-class Mount Weld rare earth element deposit, Western Australia
Pervasive chemical weathering on stable cratons may form thick regoliths and elemental enrichment, but constraining the age of regolith formation is challenging. In this study we utilize multiple geochronological techniques on different minerals from the world-class Mount Weld rare earth element (REE) deposit, formed by lateritic weathering of a carbonatite, to constrain the age of...
Authors
Philip L. Verplanck, Cameron Mark Mercer, Jay M. Thompson, Martin Danišík, Heather A. Lowers, Leah E. Morgan, Ganesh Bhat
Local water use and climate variability drive water stress and alter ecological flows over the conterminous United States Local water use and climate variability drive water stress and alter ecological flows over the conterminous United States
Consistent, large-scale estimates of water availability are needed to identify and avoid potential conflicts among human and ecosystem uses of water. We present an assessment of water limitation, defined as the monthly balance (difference) between water supply (ws) and human consumptive water use (wc), for the conterminous United States (CONUS) during water years 2010–2020. We estimate...
Authors
Edward G. Stets, Matthew J. Cashman, Olivia L. Miller, Kathryn Powlen, Anthony J. Martinez, Julie Padilla, Althea A. Archer
Lost in translation: Reconciling different streamflow permanence data products Lost in translation: Reconciling different streamflow permanence data products
The objective of this study is to provide a framework to reconcile streamflow permanence products that provide information on whether a stream is perennial or nonperennial. Accurate classification of streams as perennial or nonperennial is important for a variety of land and water resource management decisions. However, resource managers are challenged with how to reconcile different...
Authors
Kristin Jaeger, Susan Wherry, Malia H. Scott, Audrey Marie Martinez, Roy Sando, Evan A. Thaler
Adaptive capacity of freshwater organisms in North America: Current understanding and future applications Adaptive capacity of freshwater organisms in North America: Current understanding and future applications
Freshwater species are increasingly threatened by climate change, yet our ability to assess their vulnerability remains incomplete. Typically, climate change vulnerability assessments (CCVAs) evaluate three components: exposure, sensitivity, and adaptive capacity. Adaptive capacity, defined as the ability of a species to adjust to changing conditions, provides critical insight into how...
Authors
Holly Susan Embke, Karen M Alofs, David B. Bunnell, Christy M. Caudill, Cindy Chu, Corey Garland Dunn, Kaelyn Fogelman, Spencer T. Gardner, Tomas O Hook, Scott A. Jackson, Matthew Keefer, Scott T Koenigbauer, Olivia E. LeDee, Stuart A. Ludsin, Abigail Lynch, Bonnie Myers, Elizabeth A. Nyboer, Travis Seaborn, Cory Suski, Lindsey Thurman, Annika W. Walters, Jacob Thomas Westhoff