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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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Multi-level thresholds of residential and agricultural land use for elk avoidance across the Greater Yellowstone Ecosystem Multi-level thresholds of residential and agricultural land use for elk avoidance across the Greater Yellowstone Ecosystem
1. Conversion of land for settlements and agriculture is increasing globally and can influence wildlife space use. However, there is limited research to identify the thresholds of land-use change that incur wildlife avoidance and how these thresh-olds might vary across levels of selection. 2. We evaluated multi-level avoidance thresholds of elk Cervus canadensis impacted by residential...
Authors
Laura Christine Gigliotti, M. Paul Atwood, Eric K. Cole, Alyson Courtemanche, Sarah Dewey, Justin A. Gude, Mark Hurley, Matthew J. Kauffman, Kailin Kroetz, Bryan Leonard, Daniel R. MacNulty, Eric Maichak, Douglas McWhirter, Tony W. Mong, Kelly Proffitt, Brandon Scurlock, Daniel Stahler, Arthur D. Middleton
The role of giant impacts in planet formation The role of giant impacts in planet formation
Planets are expected to conclude their growth through a series of giant impacts: energetic, global events that significantly alter planetary composition and evolution. Computer models and theory have elucidated the diverse outcomes of giant impacts in detail, improving our ability to interpret collision conditions from observations of their remnants. However, many open questions remain...
Authors
Travis S.J. Gabriel, Saverio Cambioni
Toward absolute abundance for conservation applications: Estimating the number of contributors via microhaplotype genotyping of mixed-DNA sample Toward absolute abundance for conservation applications: Estimating the number of contributors via microhaplotype genotyping of mixed-DNA sample
Molecular methods including metabarcoding and quantitative polymerase chain reaction have shown promise for estimating species abundance by quantifying the concentration of genetic material in field samples. However, the relationship between specimen abundance and detectable concentrations of genetic material is often variable in practice. DNA mixture analysis represents an alternative...
Authors
Yue Shi, Cory Dick, Kirby Karpan, Diana S. Baetscher, Mark J. Henderson, Suresh A Sethi, Megan V. McPhee, Wesley A. Larson
Viewing river corridors through the lens of critical zone science Viewing river corridors through the lens of critical zone science
River corridors integrate the active channels, geomorphic floodplain and riparian areas, and hyporheic zone while receiving inputs from the uplands and groundwater and exchanging mass and energy with the atmosphere. Here, we trace the development of the contemporary understanding of river corridors from the perspectives of geomorphology, hydrology, ecology, and biogeochemistry. We then...
Authors
Adam Wymore, Adam Ward, Ellen E. Wohl, Judson Harvey
Applying decision analysis to diverse domains: An introduction to the special issue Applying decision analysis to diverse domains: An introduction to the special issue
No abstract available.
Authors
Saurabh Bansal, Johannes Ulrich Siebert, Jeffrey M. Keisler, Karen Jenni
Wildlife health surveillance: Gaps, needs and opportunities Wildlife health surveillance: Gaps, needs and opportunities
Disease emergence represent a global threat for public health, economy, and biological conservation and most of the emerging diseases have zoonotic origin from wildlife. To prevent their spread and to support the implementation of control measures, disease surveillance and reporting systems are needed, and due to globalisation, these activities should be carried at world level. To define...
Authors
M. Delgado, N. Ferrari, A. Fanelli, S. Muset, L. Thompson, Jonathan M. Sleeman, C. LeAnn White, Daniel P. Walsh, C. Wannous, P. Tizzani
Water quality at Chaco Culture National Historical Park and the potential effects of hydrocarbon extraction Water quality at Chaco Culture National Historical Park and the potential effects of hydrocarbon extraction
Study region
Authors
Benjamin S. Linhoff, Kimberly R. Beisner, Andrew G. Hunt, Zachary M. Shephard
A science and management partnership to restore coregonine diversity to the Laurentian Great Lakes A science and management partnership to restore coregonine diversity to the Laurentian Great Lakes
Similar to many freshwater ecosystems, the Laurentian Great Lakes of North America have undergone numerous anthropogenic stressors resulting in considerable loss of biodiversity and habitat. Among Great Lakes fishes, the coregonine sub-family has endured the most extensive declines, including extinction of several species (Coregonus johannae, C. alpenae, and C. kiyi orientalis) and at...
Authors
David B. Bunnell, Amanda Susanne Ackiss, Karen M. Alofs, Cory O. Brant, Charles R. Bronte, Randall M. Claramunt, John M. Dettmers, Andrew Edgar Honsey, Nicholas E. Mandrak, Andrew M. Muir, Victor Santucci, David R. Smith, Russell M. Strach, John A. Sweka, Brian Weidel, William Mattes, Kurt R. Newman
Biotic and abiotic factors affecting short-term survival of two age-0 Rainbow Trout strains in Colorado streams Biotic and abiotic factors affecting short-term survival of two age-0 Rainbow Trout strains in Colorado streams
Both biotic and abiotic factors can influence the survival and growth of age-0 salmonids. Diseases, such as whirling disease, can also affect salmonid demographics and population dynamics. Here, we conducted a supplementary analysis and evaluated specific stream characteristics that may have been responsible for the differences in growth and survival of two whirling disease resistant...
Authors
B.W. Avila, Dana L. Winkelman, E.R. Fetherman
Invasion-mediated mutualism disruption is evident across heterogeneous environmental conditions and varying invasion intensities Invasion-mediated mutualism disruption is evident across heterogeneous environmental conditions and varying invasion intensities
The impact of a biological invasion on native communities is expected to be uneven across invaded landscapes due to differences in local abiotic conditions, invader abundance, and traits and composition of the native community. One way to improve predictive ability about the impact of an invasive species given variable conditions is to exploit known mechanisms driving invasive species'...
Authors
Morgan Roche, Ian S. Pearse, Helen R. Sofaer, Stephanie N Kivlin, Greg Spyreas, David N. Zaya, Susan Kalisz
Advances in morphodynamic modeling of coastal barriers: A review Advances in morphodynamic modeling of coastal barriers: A review
As scientific understanding of barrier morphodynamics has improved, so has the ability to reproduce observed phenomena and predict future barrier states using mathematical models. To use existing models effectively and improve them, it is important to understand the current state of morphodynamic modeling and the progress that has been made in the field. This manuscript offers a review...
Authors
Steven Hoagland, Catherine Jeffries, Jennifer Irish, Robert Weiss, Kyle Mandli, Sean Vitousek, Catherine Johnson, Mary Cialone
Global responses to the COVID-19 pandemic by recreational anglers: Considerations for developing more resilient and sustainable fisheries Global responses to the COVID-19 pandemic by recreational anglers: Considerations for developing more resilient and sustainable fisheries
The global COVID-19 pandemic resulted in many jurisdictions implementing orders restricting the movements of people to inhibit virus transmission, with recreational angling often either not permitted or access to fisheries and/or related infrastructure being prevented. Following the lifting of restrictions, initial angler surveys and licence sales suggested increased participation and...
Authors
J. Robert Britton, Adrian C. Pinder, Josep Alos, Robert Arlinghaus, Andy J. Danylchuk, Wendy Edwards, Katia M. F. Freire, Casper Gundelund, Kieran Hyder, Ivan Jaric, Robert J. Lennox, Wolf-Christian Lewin, Abigail J. Lynch, Stephen R. Midway, Warren M. Potts, Karina L. Ryan, Christian Skov, Harry V. Strehlow, Sean R. Tracey, Jun-ichi Tsuboi, Paul A. Venturelli, Jessica L. Weir, Marc Simon Weltersbach, Steven J. Cooke