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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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Viral outbreak dynamics and evolution in wildlife at the interface with humans Viral outbreak dynamics and evolution in wildlife at the interface with humans
In this study, we used a multi-faceted approach to understand patterns of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) transmission and persistence in a wild white-tailed deer (Odocoileus virginianus) population. Serology data indicated transmission of SARS-CoV-2 and persistence during the seven-month sampling period. Traditional disease modelling based on deer-to-deer...
Authors
Rachael Marie Giglio, Aaron Westmoreland, Mark Q. Wilber, Grete WIlson-Henjum, Aung Nyein Chan, Billy Gardner, Wantida Horpiencharoen, Roderick B. Gagne, Avery M. Corondi, Alec Baker, Matthew A. Combs, Jefferey Chandler, Kezia R. Manlove, Kim M. Pepin, W. David Walter
Interaction strength and harvest intensity mediate predator–prey dynamics on coral reefs Interaction strength and harvest intensity mediate predator–prey dynamics on coral reefs
Understanding predator–prey relationships is fundamental to our knowledge of the stability and resilience of ecological systems. These dynamics are shaped by both ecological factors, like interaction strength, and anthropogenic factors, like harvest intensity, which can have large-scale implications for community structure. However, few studies have focused on the combined impact of...
Authors
Sophia A. Rahnke, Winter. Kawika B., Lillian Joy Tuttle Raz, Lisa C. McManus
Spatial connections between the timing of hydroclimatic extremes Spatial connections between the timing of hydroclimatic extremes
No abstract available.
Authors
Stacey Archfield
Memory and jamming in fault zone sediments Memory and jamming in fault zone sediments
Many subsurface processes involve transitions in granular material states, from arrested to creeping to flowing. Experiments and frameworks for idealized systems reveal that granular fabrics develop during shearing, co-evolve with applied stress, and govern such transitions. We use microtomography to test whether fabrics at two San Andreas fault sites reflect slip history and whether...
Authors
Jhardel Dasent, Vashan Wright, Katherine M. Scharer, Michael Manga, Richard Kilburn
From sample to sonde to Sentinel-2: Insights from a multi-scale chlorophyll-a monitoring effort in the Hudson River, New York From sample to sonde to Sentinel-2: Insights from a multi-scale chlorophyll-a monitoring effort in the Hudson River, New York
Monitoring cyanobacteria and other nuisance phytoplankton in the Hudson River is of great interest given its societal and ecological importance. Satellite remote sensing provides a cost-effective method to monitor chlorophyll-a (chl-a), a common proxy for algal biomass; however, the dynamic nature of rivers complicates approaches traditionally applied to lakes and oceans. During 2021...
Authors
Wilson Barg Salls, Robert J. Welk, Tyler V. King, Natasha Scavotto, Rebecca Michelle Gorney, Sabina R. Gifford, Michael D.W. Stouder, Elizabeth A. Nystrom, Jennifer L. Graham
Harmonization of a water withdrawal dataset for the conterminous United States Harmonization of a water withdrawal dataset for the conterminous United States
The U.S. Geological Survey is developing nationally consistent water-use modeling approaches to replace previous methods relying on locally specific reported and estimated data. These national assessments require datasets that incorporate water withdrawal variability across the United States and over long periods. However, source data often have unclear definitions, missing or varied...
Authors
Carol L. Luukkonen, Ayman H. Alzraiee, Deidre M. Herbert, Richard G. Niswonger, Joshua Larsen, Cheryl A. Buchwald, Natalie Houston, Cheryl A. Dieter, Lisa D. Miller, Jana S. Stewart
Rice cultivation supports growth and survival of a threatened semi-aquatic reptile Rice cultivation supports growth and survival of a threatened semi-aquatic reptile
Integration of agroecosystems and other working landscapes with protected lands and waters is critical to the conservation of Earth's biodiversity. Rice agroecosystems support many species by providing aquatic habitat where natural wetlands have been altered or drained. In regions with long dry seasons, rice fields and associated irrigation canals provide essential habitat for wetland...
Authors
Jonathan P. Rose, Allison M. Nguyen, Anna Jordan, Daniel Antonio Macias, Elliot James Schoenig, Giancarlo Ray Napolitano, Richard Kim, Julia S.M. Ersan, Alexandria M. Fulton, Brian J. Halstead
Seasonal movements of nonnative White Catfish in the Penobscot River estuary Seasonal movements of nonnative White Catfish in the Penobscot River estuary
Objective White Catfish Ameiurus catus has been introduced to coastal watersheds across the United States. In the Penobscot River, Maine, this species has become increasingly common in upstream habitats that have been made accessible by recent dam removals. We characterized the movements of White Catfish to understand the temporal variation in their movement patterns and contextualize...
Authors
Andrea N. Casey, Matthew A. Mensinger, Joseph D. Zydlewski
Predicting sediment bulk density for San Francisco Estuary Predicting sediment bulk density for San Francisco Estuary
Sediment bulk density (ρ-dry) and particle size are two important parameters for predicting sediment bed erosion. ρ-dry, however, is difficult to measure accurately. The units of ρdry have not been consistently reported in the literature, leading to confusion, particularly in the calculation of sediment budgets that typically require integrating mass-based and volumetric components...
Authors
Samantha C. McGill, Jessica R. Lacy
Causal analysis of fire regime drivers in California Causal analysis of fire regime drivers in California
Background Understanding the relative contribution of climate and human factors to wildfires is critical for managing risk across California’s diverse ecosystems, in the United States (US).Aims We propose a model that distinguishes between proximate and ultimate drivers of fire regimes and apply it to a century of fire and climate data to assess regional variation in causal mechanisms...
Authors
Jon Keeley, Alexandra D. Syphard
Downstream persistence of cyanobacteria in New Jersey's Raritan River basin Downstream persistence of cyanobacteria in New Jersey's Raritan River basin
Few studies have examined cyanobacteria persistence starting from lacustrine cyanobacteria harmful algal blooms (HABs) downstream. Multiple lakes and reservoirs within New Jersey's Raritan Basin Water Supply Complex (RBWSC) feature recurrent HABs and discharge water into the Raritan River. As the RBWSC provides drinking water to 1.5 million people, these HABs create drinking water...
Authors
Kyle Clonan, Meiyin Wu, Heather A. Heckathorn, Heather Desko, Eric Ernst, Pamela A. Reilly, Robert L. Schuster, Robert Newby, Annie Hurley, Alessandra Rossi
Biologging to identify nesting and non-nesting emergences for four species of imperiled sea turtles Biologging to identify nesting and non-nesting emergences for four species of imperiled sea turtles
Quantifying sea turtle nesting behavior is essential for recovery planning and evaluating management actions. Traditional monitoring approaches, based on nest counts from beach surveys, can misclassify non-nesting emergences, obscure true fecundity, and underestimate clutch frequency, metrics that directly influence population models and regulatory decisions. Here, we demonstrate that...
Authors
Kristen Hart, Connor F. White, Donna J. Shaver, Margaret Lamont, Michael Cherkiss, Andrew G. Crowder, Nicholas M. Whitney