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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.

Filter Total Items: 77868

The persistence of time: The lifespan of Bacillus anthracis spores in environmental reservoirs The persistence of time: The lifespan of Bacillus anthracis spores in environmental reservoirs

Anthrax is a lethal bacterial zoonosis primarily affecting herbivorous wildlife and livestock. Upon host death Bacillus anthracis vegetative cells form spores capable of surviving for years in soil. Anthrax transmission requires host exposure to large spore doses. Thus, conditions that facilitate higher spore concentrations or promote spore survival will increase the probability that a...
Authors
Zoe R. Barandongo, Amelie C. Dolfi, Spencer A. Bruce, Kristyna Rysava, Yen-Hua Huang, Hendrina Joel, Ayesha Hassim, Pauline L. Kamath, Henriette van Heerden, Wendy Christine Turner

Illegal shooting is now a leading cause of death of birds along power lines in the western USA Illegal shooting is now a leading cause of death of birds along power lines in the western USA

Human actions, both legal and illegal, affect wildlife in many ways. Inaccurate diagnosis of cause of death undermines law enforcement, management, threat assessment, and mitigation. We found 410 dead birds collected along 196 km of power lines in four western USA states during 2019 – 2022. We necropsied these carcasses to test conventional wisdom suggesting that electrocution is the...
Authors
Eve C. Thomason, Natalie J.S. Turley, James R. Belthoff, Tara Conkling, Todd E. Katzner

Bayesian spatio-temporal survival analysis for all types of censoring with application to a wildlife disease study Bayesian spatio-temporal survival analysis for all types of censoring with application to a wildlife disease study

In this article, we consider modeling arbitrarily censored survival data with spatio-temporal covariates. We demonstrate that under the piecewise constant hazard function, the likelihood for uncensored or right-censored subjects is proportional to the likelihood of multiple conditionally independent Poisson random variables. To address left- or interval-censored subjects, we propose to...
Authors
Kehui Yao, Jun Zhu, Daniel J. O'Brien, Daniel P. Walsh

Understanding drivers of mercury in lake trout (Salvelinus namaycush), a top-predator fish in southwest Alaska's parklands Understanding drivers of mercury in lake trout (Salvelinus namaycush), a top-predator fish in southwest Alaska's parklands

Mercury (Hg) is a widespread element and persistent pollutant, harmful to fish, wildlife, and humans in its organic, methylated form. The risk of Hg contamination is driven by factors that regulate Hg loading, methylation, bioaccumulation, and biomagnification. In remote locations, with infrequent access and limited data, understanding the relative importance of these factors can pose a...
Authors
Krista K. Bartz, Michael P. Hannam, Tammy L. Wilson, Ryan F. Lepak, Jacob M. Ogorek, Daniel Young, Collin A. Eagles-Smith, David P. Krabbenhoft

The During Nearshore Event Experiment (DUNEX): A collaborative coastal community experiment to address coastal resilience The During Nearshore Event Experiment (DUNEX): A collaborative coastal community experiment to address coastal resilience

The During Nearshore Event Experiment (DUNEX) was a large-scale coastal field effort focused on improving understanding of during-storm nearshore processes to ultimately develop predictive technologies, engineering solutions, and actions to enhance coastal resilience. The experiments were conducted on the North Carolina coast by a multidisciplinary group of over 30 research scientists...
Authors
Jessamin A. Straub, Mary A. Cialone, Britt Raubenheimer, Jenna A. Brown, Nicole Elko, Katherine L. Brodie

CONUS404: The NCAR-USGS 4-km long-term regional hydroclimate reanalysis over the CONUS CONUS404: The NCAR-USGS 4-km long-term regional hydroclimate reanalysis over the CONUS

A unique, high-resolution, hydroclimate reanalysis, 40-plus-year (October 1979–September 2021), 4 km (named as CONUS404), has been created using the Weather Research and Forecasting Model by dynamically downscaling of the fifth-generation European Centre for Medium-Range Weather Forecasts (ECMWF) atmospheric reanalysis of the global climate dataset (ERA5) over the conterminous United...
Authors
R. M. Rasmussen, F. Chen, C. H. Liu, K. Ikeda, A. Prein, J. Kim, T. Schneider, A. Dai, D. Gochis, A. Dugger, Y. Zhang, A. Jaye, J. Dudhia, C. He, M. Harrold, L. Xue, S. Chen, A. Newman, E. Dougherty, R. Abolafia-Rozenzweig, N. Lybarger, Roland J. Viger, David P. Lesmes, Katherine Skalak, John Brakebill, Donald Walter Cline, Krista A. Dunne, K. Rasmussen, G. Miguez-Macho

Intraspecific trait variability facilitates tree species persistence along riparian forest edges in Southern Amazonia Intraspecific trait variability facilitates tree species persistence along riparian forest edges in Southern Amazonia

Tropical forest fragmentation from agricultural expansion alters the microclimatic conditions of the remaining forests, with effects on vegetation structure and function. However, little is known about how the functional trait variability within and among tree species in fragmented landscapes influence and facilitate species’ persistence in these new environmental conditions. Here, we...
Authors
Leonardo Maracahipes-Santos, Divino Vicente Silvério, Leandro Maracahipes, Marcia N. Macedo, Eddie Lenza, Kathi Jo Jankowski, Michelle Wong, Antonio Carlos Silveiro da Silva, Christopher Neill, Giselda Durigan, Paulo Brando

A Great Escape: Resource availability and density-dependence shape population dynamics along trailing range edges A Great Escape: Resource availability and density-dependence shape population dynamics along trailing range edges

Populations along geographical range limits are often exposed to unsuitable climate and low resource availability relative to core populations. As such, there has been a renewed focus on understanding the factors that determine range limits to better predict how species will respond to global change. Using recent theory on range limits and classical understanding of density dependence...
Authors
Alexej Sirén, Marketa Zimova, Chris Sutherland, John T. Finn, Jillian R. Kilborn, Rachel M. Cliche, Leighlan S. Prout, L. Scott Mills, Toni Lyn Morelli

Frequent transitions in mating-type locus chromosomal organization in Malassezia and early steps in sexual reproduction Frequent transitions in mating-type locus chromosomal organization in Malassezia and early steps in sexual reproduction

Fungi in the basidiomycete genus Malassezia are the most prevalent eukaryotic microbes resident on the skin of human and other warm-blooded animals and have been implicated in skin diseases and systemic disorders. Analysis of Malassezia genomes revealed that key adaptations to the skin microenvironment have a direct genomic basis, and the identification of mating/meiotic genes suggests a...
Authors
Marco A. Coelho, Giuseppe Ianiri, Marcia David-Palma, Bart Theelen, Rohit Goyal, Aswathy Narayanan, Jeffrey M. Lorch, Kaustuv Sanyal, Teun Boekhout, Joseph Heitman

Occupancy and activity patterns of nine-banded armadillos (Dasypus novemcinctus) in a suburban environment Occupancy and activity patterns of nine-banded armadillos (Dasypus novemcinctus) in a suburban environment

The geographic range of the nine-banded armadillo (Dasypus novemcinctus) has rapidly been expanding within the United States for the last 150 years. One of the factors contributing to this astounding range expansion is the species’ ability to survive in and colonize human-dominated areas. Despite the fact that armadillos live alongside humans in numerous towns and cities across the...
Authors
Brett Alexander DeGregorio, Matthew R. McElroy, Emily P. Johansson

Diving deeper into seep distribution along the Cascadia Convergent Margin, USA Diving deeper into seep distribution along the Cascadia Convergent Margin, USA

Previous margin-wide studies of methane seep distribution along the Cascadia Subduction Zone indicate peaks in seep density within the landward limit of the of gas hydrate stability zone (GHSZ; ≤500 m depth), suggesting a link between current ocean warming, acceleration of hydrate dissociated, and methane emissions. This inferred connection, however, may not account for regional geologic...
Authors
Jane A. Rudebusch, Nancy G. Prouty, James E. Conrad, Janet Watt, Jared W. Kluesner, Jenna C. Hill, Nathaniel C. Miller, Sally J. Watson, Jess Hillman
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