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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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Landscape-scale modeling to forecast fluvial-aeolian sediment connectivity in river valleys Landscape-scale modeling to forecast fluvial-aeolian sediment connectivity in river valleys
Sedimentary landforms on Earth and other planetary bodies are built through scour, transport, and deposition of sediment. Sediment connectivity refers to the hypothesis that pathways of sediment transport do not occur in isolation, but rather are mechanistically linked. In dryland river systems, one such example of sediment connectivity is the transport of fluvially deposited sediment by...
Authors
Alan Kasprak, Joel B. Sankey, Joshua Caster
Wildlife health capacity enhancement in Thailand through the World Organisation for Animal Health Twinning Program Wildlife health capacity enhancement in Thailand through the World Organisation for Animal Health Twinning Program
There is an increasing need for robust wildlife health programs that provide surveillance and management for diseases in wildlife and wild aquatic populations to manage associated risks. This paper illustrates the value of a systematic method to enhancing wildlife health programs. The U.S. Geological Survey and Mahidol University, Faculty of Veterinary Science, Thailand National Wildlife...
Authors
Sarin Suwanpakdee, Nareerat Sangkachai, Anuwat Wiratsudakul, Witthawat Wiriyarat, Walasinee Sakcamduang, Peerawat Wongluechai, Choenkwan Pabutta, Ladawan Sariya, Waruja Korkijthamkul, David S. Blehert, C. LeAnn White, Daniel P. Walsh, Craig Stephen, Parntep Ratanakorn, Jonathan M. Sleeman
A conterminous United States–Wide validation of relative tidal elevation products A conterminous United States–Wide validation of relative tidal elevation products
Recent large-scale spatial products have been developed to assess wetland position in the tidal frame, but nationwide comparisons and validations are missing for these products. Wetland position within the tidal frame is a commonly used characteristic to compare wetlands across biogeomorphic gradients and factors heavily into wetland vulnerability models. We utilize a dataset of 365...
Authors
Justine Annaliese Neville, Glenn R. Guntenspergen, James Grace, Michael Osland, Bogdan Chivoiu
Uncertainty and spatial correlation in station measurements for mb magnitude estimation Uncertainty and spatial correlation in station measurements for mb magnitude estimation
The body‐wave magnitude () is a long‐standing network‐averaged, amplitude‐based magnitude used to estimate the magnitude of seismic sources from teleseismic observations. The U.S. Geological Survey National Earthquake Information Center (NEIC) relies on in its global real‐time earthquake monitoring mission. Although waveform modeling‐based moment magnitudes are the modern standard to
Authors
William L. Yeck, Adam T. Ringler, David R. Shelly, Paul S. Earle, Harley M. Benz, David C. Wilson
Declines and shifts in morphological diversity of ciscoes (Coregonus spp.) in lakes Huron and Michigan, 1917–2019 Declines and shifts in morphological diversity of ciscoes (Coregonus spp.) in lakes Huron and Michigan, 1917–2019
Ciscoes (Coregonus spp.) were historically abundant and ecologically important in Laurentian Great Lakes ecosystems. Despite well-documented declines in their abundance and taxonomic diversity, declines in morphological diversity remain understudied. This knowledge gap is especially pertinent for lakes Michigan and Huron, which have each lost six of eight historical species. Improved...
Authors
Paul W. Fedorowicz, Yu-Chun Kao, Amanda Susanne Ackiss, Katie Victoria Anweiler, Andrew Edgar Honsey
A unified approach to long-term population monitoring of grizzly bears in the Greater Yellowstone Ecosystem A unified approach to long-term population monitoring of grizzly bears in the Greater Yellowstone Ecosystem
Long-term wildlife research and monitoring programs strive to maintain consistent data collections and analytical methods. Incorporating new techniques is important but can render data sets incongruent and limit their potential to discern trends in demographic parameters. Integrated population models (IPMs) can address these limitations by combining data sources that may span different...
Authors
Matthew J. Gould, Justin Clapp, Mark A. Haroldson, Cecily M. Costello, J. Joshua Nowak, Hans Martin, Michael Ebinger, Daniel D. Bjornlie, Daniel Thompson, Justin A. Dellinger, Matthew A. Mumma, Paul Lukacs, Frank T. van Manen
Skill assessment of a total water level and coastal change forecast during the landfall of a hurricane Skill assessment of a total water level and coastal change forecast during the landfall of a hurricane
The Total Water Level and Coastal Change Forecast (TWL&CC Forecast) provides coastal communities with 6-day notice of potential elevated water levels and coastal change (i.e., dune erosion, overwash, or inundation) on sandy beaches that threatens safety, infrastructure, or resources. This continuously operating model provides hourly information for select regions along U.S. Gulf of...
Authors
Justin J. Birchler, Margaret L. Palmsten, Kara S. Doran, Sharifa Karwandyar, Joshua Michael Pardun, Elora M. Oades, Ryan P. Mulligan, Eli Sawyer Whitehead-Zimmers
Crystal resorption as a driver for mush maturation: An experimental investigation Crystal resorption as a driver for mush maturation: An experimental investigation
The thermal state of a magma reservoir controls its physical and rheological properties: at storage temperatures close to the liquidus, magmas are dominated by melt and therefore mobile, while at lower temperatures, magmas are stored as a rheologically locked crystal network with interstitial melt (crystal mush). Throughout the lifetime of a magmatic system, temperature fluctuations...
Authors
Martin F. Mangler, Madeleine C.S. Humphreys, Alexander A. Iveson, Kari M. Cooper, Michael A. Clynne, Amanda Lindoo, Richard A. Brooker, Fabian B. Wadsworth
Combined high rates of alternative breeding strategies unexpectedly found among populations of a solitary nesting raptor Combined high rates of alternative breeding strategies unexpectedly found among populations of a solitary nesting raptor
Social monogamy is the prevalent mating system in birds, but alternative strategies of extra-pair paternity (EPP) and conspecific brood parasitism (CBP) occur in many species. Raptors are virtually absent in discussions of broad taxonomic reviews regarding EPP and CBP likely because these strategies are mostly absent or at low frequency; CBP is unreported in solitary nesting raptors. In...
Authors
Robert N. Rosenfield, Sarah A. Sonsthagen, William E. Stout, Timothy G. Driscoll, Andrew C. Stewart, Paul N. Frater, Sandra L. Talbot
Predicting the effects of solar energy development on plants and wildlife in the Desert Southwest, United States Predicting the effects of solar energy development on plants and wildlife in the Desert Southwest, United States
Utility-scale solar energy (USSE) is rapidly expanding and expected to compose the largest source of renewable-generated electricity in the United States and globally over the coming decades. Lands in the hot Desert Southwest (Chihuahuan, Mojave, Sonoran, and San Joaquin Deserts) are increasingly selected for USSE development because of their high solar irradiance. The Desert Southwest...
Authors
Claire C. Karban, Jeffrey E. Lovich, Steven Mark Grodsky, Seth M. Munson
Abiotic and demographic drivers of flea parasitism on deer mice in a recovering mixed-conifer forest a decade postfire Abiotic and demographic drivers of flea parasitism on deer mice in a recovering mixed-conifer forest a decade postfire
With the intensity and frequency of wildfires increasing rapidly, the need to study the ecological effects of these wildfires is also growing. An understudied aspect of fire ecology is the effect fires have on parasite–host interactions, including ectoparasites that might be pathogen vectors. Although some studies have examined the impacts of fire on ticks, studies on other ectoparasites
Authors
Colton J. Padilla, Jessica T. Martin, James W. Cain, Matthew E. Gompper
The relationship between maturation size and maximum tree size from tropical to boreal climates The relationship between maturation size and maximum tree size from tropical to boreal climates
The fundamental trade-off between current and future reproduction has long been considered to result in a tendency for species that can grow large to begin reproduction at a proportionately larger size. Due to the prolonged time required to reach maturity, estimates of tree maturation size remain unavailable and we lack a global view on the generality and the shape of this trade-off...
Authors
Valentin Journe, Michał Bogdziewicz, Benoit Courbaud, Georges Kunstler, Tong Qiu, Marie-Claire Aravena Acuña, Davide Ascoli, Yves Bergeron, Daniel Berveiller, Thomas Boivin, Raul Bonal, Thomas Caignard, Maxime Cailleret, Rafael Calama, J. Julio Camarero, Chia-Hao Chang-Yang, Jerome Chave, Francesco Chianucci, Thomas Curt, Andrea Cutini, Adrian J. Das, Evangelia Daskalakou, Hendrik Davi, Nicolas Delpierre, Sylvain Delzon, Michael Dietze, Sergio Donoso Calderon, Laurent Dormont, Josep Maria Espelta, William Farfan-Rios, Michael Fenner, Jerry F. Franklin, Catherine A. Gehring, Gregory S. Gilbert, Georg Gratzer, Cathryn H. Greenberg, Arthur Guignabert, Qinfeng Guo, Andrew Hacket-Pain, Arndt Hampe, Qingmin Han, Mick E. Hanley, Janneke Hille Ris Lambers, Jan Holik, Kazuhiko Hoshizaki, Ines Ibanez, Jill F. Johnstone, Johannes M. H. Knops, Richard K. Kobe, Hiroko Kurokawa, Jonathan G. A. Lageard, Jalene M. LaMontagne, Mateusz Ledwon, Francois Lefevre, Theodor Leininger, Jean-Marc Limousin, James A. Lutz, Diana Macias, Anders Marell, Eliot J. B. McIntire, Emily V. Moran, Renzo Motta, Jonathan A. Myers, Thomas A. Nagel, Shoji Naoe, Mahoko Noguchi, Julian Norghauer, Michio Oguro, Jean-Marc Ourcival, Robert Parmenter, Ian S. Pearse, Ignacio M. Perez-Ramos, Lukasz Piechnik, Tomasz Podgorski, John Poulsen, Miranda D. Redmond, Chantal D. Reid, Pavel Samonil, C. Lane Scher, William H. Schlesinger, Barbara Seget, Shubhi Sharma, Mitsue Shibata, Miles Silman, Michael A. Steele, Nathan L. Stephenson, Jacob N. Straub, Samantha Sutton, Jennifer J. Swenson, Margaret Swift, Peter A. Thomas, Maria Uriarte, Giorgio Vacchiano, Amy V. Whipple, Thomas G. Whitham, S. Joseph Wright, Kai Zhu, Jess K. Zimmerman, Magdalena Zywiec, James S. Clark