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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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Resource use among top-level piscivores in a temperate reservoir: Implications for a threatened coldwater specialist Resource use among top-level piscivores in a temperate reservoir: Implications for a threatened coldwater specialist

Evaluations of resource use among native piscivores in natural lakes have consistently documented significant partitioning that supports coexistence. Partitioning may be less prominent in reservoirs where water-level fluctuations can compress habitat and trophic diversity, but studies are lacking. Stable isotopes and bioenergetic models were used to quantify trophic interactions within a...
Authors
Adam G. Hansen, Jennifer R. Gardner, Kristin A. Connelly, Matt Polacek, David Beauchamp

The impact of 3D finite‐fault information on ground‐motion forecasting for earthquake early warning The impact of 3D finite‐fault information on ground‐motion forecasting for earthquake early warning

We identify aspects of finite‐source parameterization that strongly affect the accuracy of estimated ground motion for earthquake early warning (EEW). EEW systems aim to alert users to impending shaking before it reaches them. The U.S. West Coast EEW system, ShakeAlert, currently uses two algorithms based on seismic data to characterize the earthquake’s location, magnitude, and origin...
Authors
Jessica R. Murray, Eric M. Thompson, Annemarie S. Baltay Sundstrom, Sarah E. Minson

Projecting the remaining habitat for the western spadefoot (Spea hammondii) in heavily urbanized southern California Projecting the remaining habitat for the western spadefoot (Spea hammondii) in heavily urbanized southern California

Extensive urbanization in coastal southern California has reduced natural habitat in this biodiversity hotspot. To better conserve ecological communities, state and federal agencies, along with local jurisdictions and private stakeholders, developed regional conservation plans for southern California. Although many protected areas exist within this region, the patchwork nature of these...
Authors
Jonathan P. Rose, Brian J. Halstead, Robert H. Packard, Robert N. Fisher

Oil and gas wastewater components alter streambed microbial community structure and function Oil and gas wastewater components alter streambed microbial community structure and function

The widespread application of directional drilling and hydraulic fracturing technologies expanded oil and gas (OG) development to previously inaccessible resources. A single OG well can generate millions of liters of wastewater, which is a mixture of brine produced from the fractured formations and injected hydraulic fracturing fluids (HFFs). With thousands of wells completed each year...
Authors
Denise M. Akob, Adam C. Mumford, Andrea Fraser, Cassandra Rashan Harris, William H. Orem, Matthew S. Varonka, Isabelle M. Cozzarelli

Airborne hybrid sensor maps the country: Multi-agency effort for testing a potential new hybrid 3DEP-NAIP sensor Airborne hybrid sensor maps the country: Multi-agency effort for testing a potential new hybrid 3DEP-NAIP sensor

No abstract available.
Authors
Jason M. Stoker, Aparajithan Sampath, Minsu Kim, Jeffrey Irwin, Eric Rounds, Josh Heyer, Julie Davenport, Gabe Bellante, Tony Kimmet, Collin McCormick, John Mootz

The silence of the clams: Forestry registered pesticides as multiple stressors on soft-shell clams The silence of the clams: Forestry registered pesticides as multiple stressors on soft-shell clams

Contaminants are ubiquitous in the environment, often reaching aquatic systems. Combinations of forestry use pesticides have been detected in both water and aquatic organism tissue samples in coastal systems. Yet, most toxicological studies focus on the effects of these pesticides individually, at high doses, and over acute time periods, which, while key for establishing toxicity and...
Authors
Alexandra G. Tissot, Elise F. Granek, Anne W Thompson, Michelle L. Hladik, Patrick W. Moran, Kaegen Scully-Engelmeyer

Influence of seasonal extreme flows on Brook Trout recruitment Influence of seasonal extreme flows on Brook Trout recruitment

Populations of Brook Trout Salvelinus fontinalis exhibit large variation in annual recruitment (abundance of young of the year [age 0]), which is likely a product of density-dependent and density-independent factors. Quantifying the importance of each of these mechanisms in regulating Brook Trout recruitment would be valuable to managers that are responsible for the conservation of this...
Authors
John A. Sweka, Tyler Wagner

Accuracy and precision of otolith-derived age Interpretations for known-age lake trout Accuracy and precision of otolith-derived age Interpretations for known-age lake trout

Catch-at-age data are used to inform important management decisions for recovering populations of Lake Trout Salvelinus namaycush. Age data for Lake Trout are commonly derived from interpretation of annual growth marks (annuli) on the fish’s otoliths. Due to the tendency for annuli to vary in appearance and the subjectivity that is inherent to any age interpretation method, it is...
Authors
Christopher Osborne, Jason Robinson, Brian F. Lantry, Brian Weidel, Ian R. Hardin, Michael J. Connerton

Review of ESA SYMP 7: A dynamic perspective on ecosystem restoration–establishing temporal connectivity at the intersection between paleoecology and restoration ecology Review of ESA SYMP 7: A dynamic perspective on ecosystem restoration–establishing temporal connectivity at the intersection between paleoecology and restoration ecology

Landscape connectivity is vital not only spatially, but also temporally; as ecosystems change, it is important to be aware of past, present, and future variables that may impact ecosystem function and biodiversity. As climate and environments continue to change, choosing appropriate restoration targets is becoming more challenging. By considering the paleoecological and...
Authors
Rachel Reid, Jenny McGuire, Jens-Christiane Svenning, G. Lynn Wingard, David Moreno-Mateos

The developing zebrafish kidney is impaired by Deepwater Horizon crude oil early-life stage exposure: A molecular to whole-organism perspective The developing zebrafish kidney is impaired by Deepwater Horizon crude oil early-life stage exposure: A molecular to whole-organism perspective

Crude oil is known to induce developmental defects in teleost fish exposed during early life stages (ELSs). While most studies in recent years have focused on cardiac endpoints, evidence from whole-animal transcriptomic analyses and studies with individual polycyclic aromatic hydrocarbons (PAHs) indicate that the developing kidney (i.e., pronephros) is also at risk. Considering the role...
Authors
Fabrizio Bonatesta, Cameron Emadi, Edwin R. Price, Yadong Wang, Justin Blaine Greer, Elvis Genbo Xu, Daniel Schlenk, Martin Grosell, Edward M. Mager

Permafrost characterization and feature identification using public domain airborne electromagnetic data, interior Alaska Permafrost characterization and feature identification using public domain airborne electromagnetic data, interior Alaska

The Alaska Division of Geological & Geophysical Surveys (DGGS) airborne electromagnetic (AEM) data are an excellent resource for permafrost characterization. AEM data can be used for pingo identification, estimating permafrost thickness, estimating surface talik thickness, evaluating permafrost health (temperature), talik identification and more. Data examples are shown from...
Authors
Abraham M. Emond, Ronald Daanen, Burke J. Minsley

Can identifying discrete behavioral groups with individual-based acoustic telemetry advance the understanding of fish distribution patterns? Can identifying discrete behavioral groups with individual-based acoustic telemetry advance the understanding of fish distribution patterns?

Identifying patterns of organismal distribution can provide valuable insights for basic and applied marine and coastal ecology because understanding where animals are located is foundational to both research and science-based conservation. Understanding variation in distributional patterns can lead to a better assessment of ecological drivers and an improved ability to predict...
Authors
Ryland B. Taylor, Martha E. Mather, Joseph M. Smith, Kayla M. Boles
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