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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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Using life history traits to assess climate change vulnerability in understudied species Using life history traits to assess climate change vulnerability in understudied species

Climate change is a primary threat to biodiversity, but for many species, we still lack information required to assess their relative vulnerability to changes. Climate change vulnerability assessment (CCVA) is a widely used technique to rank relative vulnerability to climate change based on species characteristics, such as their distributions, habitat associations, environmental...
Authors
Ross K Hinderer, Blake R. Hossack, Lisa A Eby

Changes in streamflow seasonality associated with hydroclimatic variability in the north-central United States among three discrete temporal periods, 1946–2020 Changes in streamflow seasonality associated with hydroclimatic variability in the north-central United States among three discrete temporal periods, 1946–2020

Study regionNorth-central United StatesStudy focusThis study uses circular statistics to characterize the seasonal properties of annual maximum (AMS) and peaks-over-threshold (POT) streamflow time series for 841 and 623 selected U.S. Geological Survey (USGS) streamgages, respectively, without regulation or substantial diversion among common 75-, 50-, and 30-year trend periods through...
Authors
Nancy A. Barth, Harper N. Wavra, Anthony R Koebele, Steven K. Sando

Characterizing directivity in small (M 2.4-5) aftershocks of the Ridgecrest sequence Characterizing directivity in small (M 2.4-5) aftershocks of the Ridgecrest sequence

Directivity, or the focusing of energy along the direction of an earthquake rupture, is a common property of earthquakes of all sizes and can cause increased hazard due to azimuthally dependent ground‐motion amplification. For small earthquakes, the effects of directivity are generally less pronounced due to reduced rupture size, yet the directivity in small events can bias source...
Authors
Shanna Chu, Annemarie S. Baltay Sundstrom, Rachel E. Abercrombie

Drought before fire increases tree mortality after fire Drought before fire increases tree mortality after fire

Fire and drought are expected to increase in frequency and severity in temperate forests due to climate change. To evaluate whether drought increases the likelihood of post-fire tree mortality, we used a large database of tree survival and mortality from 32 years of wildland fires covering four dominant western North American conifers. We used Bayesian hierarchical modeling to predict...
Authors
C. Alina Cansler, Micah C. Wright, Phillip J. van Mantgem, Timothy M. Shearman, J. Morgan Varner, Sharon M. Hood

Global patterns of coseismic landslide runout mobility differ from aseismic landslide trends Global patterns of coseismic landslide runout mobility differ from aseismic landslide trends

Coseismic landslides significantly contribute to human and economic losses during and immediately following earthquakes, yet very little data on the runout of such landslides exist. While well-established behavior of aseismic (e.g., hydrologically triggered) landslide runout mobility suggests strong correlation between landslide size and mobility, limited studies of coseismic landslide...
Authors
Alex R. Grant, Natalie K. Culhane

Pragmatically mapping Phragmites with unoccupied aerial systems: A comparison of invasive species land cover classification using RGB and multispectral imagery Pragmatically mapping Phragmites with unoccupied aerial systems: A comparison of invasive species land cover classification using RGB and multispectral imagery

Unoccupied aerial systems (UASs) are increasingly being deployed in coastal environments to rapidly map and monitor changes to geomorphology, vegetation, and infrastructure, particularly in difficult to access areas. UAS data, relative to airplane or satellite data, typically have higher spatial resolution, sensor customization, and increased flexibility in temporal resolution, which...
Authors
Alexandra Danielle Evans, Jennifer Marie Cramer, Victoria Mary Scholl, Erika E. Lentz

Invisible hand of sampling for management: Underlying needs to survey a threatened seabird can bias aggregated data Invisible hand of sampling for management: Underlying needs to survey a threatened seabird can bias aggregated data

Aim Surveying for a species of concern ahead of proposed activities that alter its habitat is routine practice in conservation and management. Such surveys may accumulate large datasets that could further elucidate trends in abundance and distribution. However, the as-needed surveying of proposed activities may impart a sample site selection bias on the data if used for another purpose...
Authors
Ryan Baumbusch, Adam Duarte, James T. Peterson

Mixed responses of tenebrionid beetles to solar energy development in the Mojave Desert Mixed responses of tenebrionid beetles to solar energy development in the Mojave Desert

Solar energy development causes land-use change and habitat alteration that may affect desert ecosystems. Tenebrionid beetles have evolved to exploit desert environments and heavily contribute to ecosystem functionality in aridlands, yet their species-specific, ecological responses to solar energy development are unknown. Our objective was to elucidate effects of solar energy development...
Authors
Steven Mark Grodsky, Joshua W. Campbell, Karl A. Roeder, Evan Waite, Ethan R. Wright, M. Andrew Johnston

New York State climate impacts assessment chapter 05: Ecosystems New York State climate impacts assessment chapter 05: Ecosystems

The people of New York have long benefited from the state's diversity of ecosystems, which range from coastal shorelines and wetlands to extensive forests and mountaintop alpine habitat, and from lakes and rivers to greenspaces in heavily populated urban areas. These ecosystems provide key services such as food, water, forest products, flood prevention, carbon storage, climate moderation
Authors
Sheila Hess, Douglas A. Burns, Garrett Boudinot, Carrie Brown-Lima, Jason Corwin, John Foppert, George Robinson, Kevin C. Rose, Matthew D. Schlesinger, Rebecca Shuford, Amanda Stevens

Trophic transfer of fipronil residues to black-footed ferrets: Implications for ferret safety, flea control, and plague mitigation Trophic transfer of fipronil residues to black-footed ferrets: Implications for ferret safety, flea control, and plague mitigation

Sylvatic plague, caused by the flea-borne bacterium Yersinia pestis, is an invasive disease in North America that causes reductions of native fauna and transforms ecosystems. Fipronil baits have shown promise in reducing flea loads on prairie dogs Cynomys spp. for plague mitigation. Many species depend on prairie dogs and their ecological influences, including the black-footed ferret...
Authors
Tyler N. Tretten, David A. Eads, John P. Hughes, Gregory P. Dooley, Dean E. Biggins

Retention of T‐bar anchor tags by adult steelhead during their upstream migration Retention of T‐bar anchor tags by adult steelhead during their upstream migration

Objective: T-bar anchor tags can be used to obtain recapture data from anglers, directly estimate exploitation, and evaluate population dynamics. Unfortunately, their use by biologists to study anadromous salmonid fisheries is limited. Two hurdles to adoption include the functional difficulty of tagging large anadromous salmonids using conventional tagging equipment and a lack of...
Authors
Nicholas S. Voss, Joshua L. McCormick, William J. Lubenau, Brett J. Bowersox, Timothy Copeland, Michael C. Quist

Smectite-rich horizons in Inceptisols trigger shallow landslides in tropical granitic terranes Smectite-rich horizons in Inceptisols trigger shallow landslides in tropical granitic terranes

Puerto Rico was affected by >70,000 landslides in the wake of 2017 Hurricane Maria, and landslide prevalence was especially high in the Utuado region in the Cordillera Central. Landslide density was highest where soil parent material is granodiorite; landslide slip surfaces tended to be shallow (
Authors
Peter C. Ryan, D. Mahmud, K. L. Derenoncourt, L. F. Nerbonne, I. L. Perez-Martin, J. Reyes Collovati, M. Junaid, Corina Cerovski-Darriau
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