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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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Use of regional breeding bird surveys to estimate bird populations in Big Thicket National Preserve Use of regional breeding bird surveys to estimate bird populations in Big Thicket National Preserve
We used data collected during surveys of seven North American Breeding Bird Survey routes in eastern Texas to estimate avian populations within Big Thicket National Preserve. On only 61 of the 350 count locations located along these routes did observers monitor birds within the boundaries of this preserve. On selected routes, we recorded initial bird detections during the 3-min bird...
Authors
Daniel J. Twedt, Clifford E. Shackelford
Wildfire imagery reduces risk information-seeking among homeowners as property wildfire risk increases Wildfire imagery reduces risk information-seeking among homeowners as property wildfire risk increases
Negative imagery of destruction may induce or inhibit action to reduce risks from climate-exacerbated hazards, such as wildfires. This has generated conflicting assumptions among experts who communicate with homeowners: half of surveyed wildfire practitioners perceive a lack of expert agreement about the effect of negative imagery (a burning house) on homeowner behavior, yet most believe...
Authors
Hilary Byerly Flint, Patricia A. Champ, James R. Meldrum, Hannah Brenkert-Smith
Using continuous surveys to evaluate precision and bias of inferences from design-based reach-scale sampling of stream habitat Using continuous surveys to evaluate precision and bias of inferences from design-based reach-scale sampling of stream habitat
Accurately estimating stream characteristics is essential for managing and restoring populations and aquatic ecosystems. Reach-based sampling designs have been used extensively to collect fisheries related data; however, few studies have examined the effectiveness of reach-based sampling designs for stream habitat assessments. Here, we used continuous habitat surveys to census stream...
Authors
Christopher L. Clark, Robert Al-Chokhachy, Kai Ross
Wildlife migrations highlight importance of both private lands and protected areas in the Greater Yellowstone Ecosystem Wildlife migrations highlight importance of both private lands and protected areas in the Greater Yellowstone Ecosystem
Formally protected areas are an important component of wildlife conservation, but face limitations in their effectiveness for migratory species. Improved stewardship of working lands around protected areas is one solution for conservation planning, but private working lands are vulnerable to development. In the Greater Yellowstone Ecosystem (GYE), ungulates such as elk (Cervus canadensis...
Authors
Laura C. Gigliottia, Wenjing Xu, Gabriel Zuckerman, M. Paul Atwood, Eric K. Cole, Alyson Courtemanch, Sarah Dewey, Justin A. Gude, Patrick Hnilicka, Matthew J. Kauffman, Kailin Kroetz, Arthur Lawson, Bryan Leonard, Daniel MacNulty, Eric Maichak, Douglas McWhirter, Tony W. Mong, Kelly Proffitt, Brandon Scurlock, Daniel R. Stahler, Arthur D. Middleton
Corrigendum: Associations between cyanobacteria and indices of secondary production in the western basin of Lake Erie Corrigendum: Associations between cyanobacteria and indices of secondary production in the western basin of Lake Erie
In the last year, we became aware that data used in our above-referenced manuscript from 2018 published in Limnology and Oceanography contained significant errors. In the 2018 manuscript, we found that indices of secondary production were negatively correlated to indices of cyanobacterial abundance and toxicity. Unfortunately, one of our indices of cyanobacterial abundance (biovolume)...
Authors
James H. Larson, Mary Anne Evans, Robert J Kennedy, Sean Bailey, Keith A. Loftin, Zachary R. Laughrey, Robin A. Femmer, Jeff S. Schaeffer, William B. Richardson, T.T. Wynne, John C. Nelson, Joseph W. Duris
Last Glacial Maximum and early deglaciation in the Stura Valley, southwestern European Alps Last Glacial Maximum and early deglaciation in the Stura Valley, southwestern European Alps
We combined data from geomorphologic surveys, glacial modelling, and 10Be exposure ages of boulders on moraines, to investigate the Last Glacial Maximum (LGM) and the early retreat glacial phases in the Stura Valley of the Maritime Alps. We used the exposure ages to reconstruct the timing of standstills or readvances which interrupted the post-LGM withdrawal, initiated ∼24 ka. We mapped...
Authors
Adriano Ribolini, Matteo Spagnolo, Andrew J. Cyr, Paolo Roberto Federici
Urbanization of grasslands in the Denver area affects streamflow responses to rainfall events Urbanization of grasslands in the Denver area affects streamflow responses to rainfall events
A thorough understanding of how urbanization affects stream hydrology is crucial for effective and sustainable water management, particularly in rapidly urbanizing regions. This study presents a comprehensive analysis of changes in streamflow response to rainfall events across a rural to urban gradient in the semi-arid area of Denver, Colorado. We used 8 years of April to October...
Authors
Stacy Wilson, Aditi S. Bhaskar, Benjamin Choat, Stephanie K. Kampf, Timothy Green, Kristina G. Hopkins
One hundred years of cobalt production in the Democratic Republic of the Congo One hundred years of cobalt production in the Democratic Republic of the Congo
Cobalt is an indispensable element for the manufacture of strategic technologies including advanced batteries, jet engines, rare-earth permanent magnets, petroleum catalysts, and tool parts that enable construction, manufacturing, and mining. Cobalt routinely scores high in mineral supply risk assessments due to the concentration of cobalt mine production in the Democratic Republic of...
Authors
Andrew L. Gulley
Barrier islands influence the assimilation of terrestrial energy in nearshore fishes Barrier islands influence the assimilation of terrestrial energy in nearshore fishes
We examined the relative importance of landscape features on estuarine fish trophic structure and dependence on terrestrial organic matter (OMterr) in four barrier island lagoon systems along the Alaskan Beaufort Sea coast. Our study compared two relatively large lagoon systems characterized by high river discharge and relatively free ocean water exchanges (central region near Prudhoe...
Authors
Ashley E. Stanek, Vanessa R. von Biela, Sarah M. Laske, Rebecca L. Taylor, Kenneth H. Dunton
Small anthropogenic landforms from past charcoal production control moisture dynamics and chemistry in northcentral Appalachian soils Small anthropogenic landforms from past charcoal production control moisture dynamics and chemistry in northcentral Appalachian soils
Throughout the northeastern United States (U.S.) and Europe, relict charcoal hearths (RCHs) are regularly being discovered in proximity to furnaces once used for the extraction of metal from ore or quick-lime production; charcoal produced in hearths was used as a furnace fuel. Given previous research has shown that topographic and subsurface disturbance can be great when a hearth is...
Authors
S. Bayuzick, D. Guarin, A. Bonhage, F. Hirsch, Duane R. Diefenbach, M. McDill, T. Raab, P.J. Drohan
Waveform signatures of earthquakes located close to the subducted Gorda Plate interface Waveform signatures of earthquakes located close to the subducted Gorda Plate interface
Complex seismic velocity structure near the earthquake source can affect rupture dynamics and strongly modify the seismic waveforms recorded near the fault. Fault‐zone waves are commonly observed in continental crustal settings but are less clear in subduction zones due to the spatial separation between seismic stations and the plate boundary fault. We observed anomalously long duration...
Authors
Jianhua Gong, Jeffrey J. McGuire
Limits to coseismic landslides triggered by Cascadia Subduction Zone earthquakes Limits to coseismic landslides triggered by Cascadia Subduction Zone earthquakes
Landslides are a significant hazard and dominant feature throughout the landscape of the Pacific Northwest. However, the hazard and risk posed by coseismic landslides triggered by great Cascadia Subduction Zone (CSZ) earthquakes is highly uncertain due to a lack of local and global data. Despite a wealth of other geologic evidence for past earthquakes on the Cascadia Subduction Zone, no...
Authors
Alex R. Grant, William Struble, Sean Richard LaHusen