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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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Beyond optimality: Dryland ecosystems infrequently use water efficiently for carbon gain Beyond optimality: Dryland ecosystems infrequently use water efficiently for carbon gain

Optimality theory assumes plants maximize carbon gain per unit water lost and is often implemented to scale leaf-level carbon gain and water use to regional and global scales. Optimality theory is often mathematically represented by assuming plant water-use efficiency (WUE) scales with VPDk, where k = ½ represents expected optimal behavior. It is unclear, however, if this relationship...
Authors
Emma G. Reich, Kym Samuels-Crow, John B. Bradford, Marcy Litvak, Daniel Rodolphe Schlaepfer, Kiona Ogle

Ecovoltaic solar energy development effects to microclimate, temperature, and soil moisture in panel array interspaces in a warm desert Ecovoltaic solar energy development effects to microclimate, temperature, and soil moisture in panel array interspaces in a warm desert

Solar energy development is increasing in warm deserts of the southwestern United States, and ecovoltaics has emerged as an approach to maintain ecosystem function within solar facilities while meeting increasing regional energy demands. The Solar Gemini Project, located in the northeastern Mojave Desert, USA, is one of largest photovoltaic facilities incorporating an ecovoltaics...
Authors
Juan Pinos, Seth M. Munson, Claire C. Karban, Matthew D. Petrie

Satellite radar advances could transform global snow monitoring Satellite radar advances could transform global snow monitoring

The recent SnowEx campaign and the new NISAR satellite mission are lighting the way to high-resolution snowpack monitoring and improved decisionmaking in critical river basins around the world.
Authors
Randall Ray Bonnell, Jack Tarricone, Hans-Peter Marshall, Elias Deeb, Carrie Vuyovich

Using a BACI design to assess stream ecology and chemistry response after wildfire Using a BACI design to assess stream ecology and chemistry response after wildfire

Wildfires can have complex effects on aquatic communities, which can be either beneficial or adverse depending on the setting. In California, USA, the size, frequency, and severity of wildfires has greatly increased over the last few decades. Understanding the effects of fire on aquatic ecosystem health and human land use has become increasingly important in managing the interface of the...
Authors
Marissa L. Wulff, Jason T. May, Brock M. Huntsman, Ian R. Waite, Larry M. Brown

Elevation mediates juvenile steelhead demographic response to stream temperature and flow Elevation mediates juvenile steelhead demographic response to stream temperature and flow

Climate change alters streams by modifying flow dynamics, temperature, and biotic communities, changing the habitat where stream dwelling fish have evolved. We used snorkel survey data spanning four decades to investigate how juvenile steelhead (anadromous Oncorhynchus mykiss) counts and size structure were influenced by stream temperature and flow. Warmer temperatures were associated...
Authors
Ryan A. Vosbigian, Alexa Ballinger, Timothy E. Link, Timothy Copeland, Matthew Richard Falcy

Between a rock and a hard place: Experiences of the chronic wasting disease management community Between a rock and a hard place: Experiences of the chronic wasting disease management community

Chronic wasting disease (CWD) is a widespread and incurable cervid disease. Despite continuing investments, the logistical challenges of CWD have required wildlife managers and researchers to navigate changing priorities with conflicting public perceptions. When overcoming difficult management problems, leveraging exploratory methods may identify previously unrecognized hypotheses. In...
Authors
Patrick Roan, Brad Milley, Nicholas W. Cole

Advancing current understanding of Martian impact-generated hydrothermal systems through novel coupled modeling: Insights from Gale, Jezero, and other craters Advancing current understanding of Martian impact-generated hydrothermal systems through novel coupled modeling: Insights from Gale, Jezero, and other craters

Impact-generated hydrothermal systems are considered potentially habitable environments on Mars, Earth, and other planetary bodies for microbial life. However, there is an ongoing debate regarding what geological features on Mars provide definitive evidence for such systems. Although earlier studies have modeled hydrothermal processes in Martian craters, they often lacked integration...
Authors
Alexander J. Trowbridge, Simone Marchi, Joshua M. Taron, Gordon R. Osinski

A 10-year continuous daily simulation of chloride flux from a suburban watershed in Fairfax County, Virginia, USA A 10-year continuous daily simulation of chloride flux from a suburban watershed in Fairfax County, Virginia, USA

Increasing levels of chloride in surface water are associated with detrimental effects on water quality, aquatic ecosystems, infrastructure, and human health. Numerous mass-balance studies have inferred watershed transport processes by interpreting chloride inputs and outputs, but few represent internal dynamics explicitly. We constructed a coupled water/chloride mass balance model to...
Authors
Jeffrey G. Chanat, Christopher Allan Custer

Potential interactions between birds and floating photovoltaic solar energy: Spatially informed species vulnerabilities, techno-ecological risks, and sustainability trade-offs Potential interactions between birds and floating photovoltaic solar energy: Spatially informed species vulnerabilities, techno-ecological risks, and sustainability trade-offs

Floating photovoltaics (floating solar panels; FPV) can reduce the negative impacts of solar energy development in terrestrial environments, but their effects on freshwater ecosystems remain poorly understood. We examined potential FPV interactions with avian biodiversity, using previously modeled technical potential of FPV in the northeastern United States. We developed a vulnerability...
Authors
Allison D. Binley, Adam Gallaher, Amanda D. Rodewald, Steven Mark Grodsky

Are behavioural ecotoxicity endpoints relevant at the population level? Evidence-based insights for environmental protection Are behavioural ecotoxicity endpoints relevant at the population level? Evidence-based insights for environmental protection

A substantial body of evidence exists demonstrating that exposure to environmental contaminants can alter animal behavior. Moreover, methodological and technological advancements, as well as increasing standardization, mean that behavioral ecotoxicity studies are more rigorous and reliable than ever before. Despite this, behavioral data are still seldom used in the risk assessment and...
Authors
Michael G. Bertram, Marlene Ågerstrand, Jack A. Brand, Bryan W. Brooks, ZhiChao Dang, Alex T. Ford, Henner Hollert, Matthew K. LeFauve, Jack L. Manera, Jake M. Martin, Marcus Michelangeli, Maria Moiron, Eleanor R. Moore, Holly J. Puglis, Andrew Sih, Jeffery A. Steevens, Eli S.J. Thoré, Bob B.M. Wong, Lauren Zink, Tomas Bodin

The impact of 3D structure on coseismic coastal land-level change and tsunami generation in the Cascadia Subduction Zone The impact of 3D structure on coseismic coastal land-level change and tsunami generation in the Cascadia Subduction Zone

Estimates of coseismic vertical displacements from past and potential future subduction zone earthquakes provide critical constraints on regional seismic and tsunami hazard. Many studies use elastic homogeneous half-space models to calculate vertical displacements from a specified earthquake slip distribution, neglecting complexities of 3D structure in subduction zone settings. Here, we...
Authors
Audrey M. Dunham, Jeonghyeop Kim, Erin A. Wirth, David A. Schmidt, Randy J. LeVeque, Yong Wei, Loyce M. Adams, Frederick Pollitz

The value of reducing uncertainties to support the management of a high‐elevation endemic salamander The value of reducing uncertainties to support the management of a high‐elevation endemic salamander

Many salamander populations are declining, and methods to determine how best to allocate limited resources to slow or reverse these declines could support land managers in their decision‐making processes. Multiple types of uncertainty may delay management decisions, including when (1) knowledge of a species' ecology is incomplete, (2) climate change effects on environmental covariates...
Authors
Evan H. Campbell Grant, Jo A. Werba, Riley Olivia Mummah, Adrianne Brand
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