Articles
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
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.
Filter Total Items: 77868
Modeling the effects of interior headland restoration on estuarine sediment transport processes in a marine-dominant estuary Modeling the effects of interior headland restoration on estuarine sediment transport processes in a marine-dominant estuary
The effects of interior headland restoration on estuarine sediment transport processes were assessed through process-based numerical modeling. Three proposed interior headland restoration scenarios in the Grand Bay estuary (Mississippi/Alabama) were modeled using Delft3D to understand impacts on suspended sediment concentrations, bed level morphology, and sediment fluxes under present...
Authors
Robert L. Jenkins, Davina Passeri, Christopher G. Smith, David M. Thompson, Kathryn E.L. Smith
Managing conflict between nesting common terns and herring gulls Managing conflict between nesting common terns and herring gulls
Context: Due to the frequent depredation of eggs and chicks by herring gulls (Larus argentatus), numerous approaches to reduce their impact on tern colonies have been tested by wildlife managers. Previous studies have shown that the use of overhead lines presents a promising method to prevent gull nesting in tern colonies, but little work has evaluated if this approach is suitable for...
Authors
Jeffery D. Sullivan, Amy O’Donnell, Lauren Marie-Therese Lescure, Andrew Rapp, Carl C. Callahan, Peter C. McGowan, Tim Carney, Diann Prosser
The late Pleistocene Sacarosa tephra-fall deposit, Misti Volcano, Arequipa, Peru: Its magma, eruption, and implications for past and future activity The late Pleistocene Sacarosa tephra-fall deposit, Misti Volcano, Arequipa, Peru: Its magma, eruption, and implications for past and future activity
Between 38.5 ka cal BP and 32.4 ka cal BP, a dacitic Volcanic Explosivity Index 5 eruption at Misti volcano emplaced the Sacarosa tephra-fall deposit. Its biotite phenocrysts, fine grain size, scarce lithics, and abundant loose crystals characterize the deposit at locations sampled. The eruption’s ~ 800 °C magma rose rapidly from ~ 10 km depth, culminating in a Plinian eruption which...
Authors
Christopher Harpel, JJ Cuno, Marie K. Takach, M. Rivera, Rigoberto Aguilar, Frank III Tepley, F. Garcia-Arenal
Predicting burn severity for integration with post-fire debris-flow hazard assessment: A case study from the Upper Colorado River Basin, USA Predicting burn severity for integration with post-fire debris-flow hazard assessment: A case study from the Upper Colorado River Basin, USA
Background: Burn severity significantly increases the likelihood and volume of post-wildfire debris flows. Pre-fire severity predictions can expedite mitigation efforts because precipitation contributing to these hazards often occurs shortly after wildfires, leaving little time for post-fire planning and management. Aim: The aim of this study was to predict burn severity using pre-fire...
Authors
Adam Gerhard Wells, Todd Hawbaker, John Kevin Hiers, Jason W. Kean, Rachel A. Loehman, Paul F. Steblein
Integrating remote sensing with ground-based observations to quantify the effects of an extreme freeze event on black mangroves (Avicennia germinans) at the landscape scale Integrating remote sensing with ground-based observations to quantify the effects of an extreme freeze event on black mangroves (Avicennia germinans) at the landscape scale
Climate change is altering the frequency and intensity of extreme weather events. Quantifying ecosystem responses to extreme events at the landscape scale is critical for understanding and responding to climate-driven change but is constrained by limited data availability. Here, we integrated remote sensing with ground-based observations to quantify landscape-scale vegetation damage from...
Authors
Melinda Martinez, Michael Osland, James B. Grace, Nicholas Enwright, Camille Stagg, Simen Kaalstad, Gordon Anderson, Anna R. Armitage, Just Cebrian, Karen L. Cummins, Richard Day, Donna J. Devlin, Kenneth H. Dunton, Laura Feher, Alejandro Fierro-Cabo, Elena A. Flores, Andrew From, A. Randall Hughes, David A. Kaplan, Amy K. Langston, Christopher J. Miller, Charles E. Proffitt, Nathan G.F. Reaver, Colt R. Sanspree, Caitlin M. Snyder, Andrew P. Stetter, Kathleen M. Swanson, Jamie E. Thompson, Carlos Zamora-Tovar
Editorial: Ecological and behavioral traits of apex predators in oceanic insular ecosystems: Advances and challenges in research and conservation Editorial: Ecological and behavioral traits of apex predators in oceanic insular ecosystems: Advances and challenges in research and conservation
No abstract available.
Authors
Filipe Alves, Nuno Queiroz, Patrick G.R. Jodice
Native fish abundance and habitat selection changes in the presence of nonnative piscivores Native fish abundance and habitat selection changes in the presence of nonnative piscivores
We compared abundance patterns and developed resource selection models for imperilled native southwestern (USA) fishes in the presence and absence of Black Bass (Micropterus spp.) to evaluate how fishes alter their selection for habitats when sympatric with a nonnative piscivore. We collected data using snorkel surveys and in-stream habitat sampling in Fossil Creek (AZ), upstream (native...
Authors
Christopher J. Jenney, Javan Mathias Bauder, Scott A. Bonar
Assessing the suitability of YY males and ZZ females as an invasive species population control method across life histories Assessing the suitability of YY males and ZZ females as an invasive species population control method across life histories
Natural resource managers use tools to control invasive species. In theory, stocking YY males or ZZ females would allow managers to skew sex ratios until populations collapse. In combination with other suppression methods, such as removal, this approach could be incorporated into Integrated Pest Management plans. For example, fishery managers have stocked YY males to control isolated non...
Authors
Richard A. Erickson, Hannah Mann Thompson, Stacie A. Kageyama, Grace M. Andriacchi, Aaron R. Cupp, Reynaldo Patino, Jon Amberg
Conservation at the nexus of niches: Multidimensional niche modeling to improve management of Prairie Chub Conservation at the nexus of niches: Multidimensional niche modeling to improve management of Prairie Chub
Objective A central challenge in applied ecology is understanding how organisms are spatially and temporally distributed and how management might be tailored to maintain or restore species distributions. The niche concept is central to understanding species distributions, but the diversity of niche definitions requires that multiple dimensions be considered. For example, the Grinnellian...
Authors
Zachary D. Steffensmeier, Shannon K. Brewer, Maeghen Wedgeworth, Trevor A. Starks, Anthony W. Rodger, Erin Nguyen, Joshuah S. Perkin
A survey of non-USGS continuous streamflow gaging networks in the Pacific Northwest A survey of non-USGS continuous streamflow gaging networks in the Pacific Northwest
Extensive streamflow data sources exist beyond the largest streamflow data provider in the United States, the U.S. Geological Survey. We developed and distributed a survey to about 300 individuals and organizations that collect streamflow data across the Pacific Northwest (Idaho, Oregon, Washington). We received 100 responses with 56% of those sufficiently complete to include in the...
Authors
Kendra E. Kaiser, Kyle W. Blasch, Mcallister Hall
Estimating lentic recreational fisheries catch and effort across the United States Estimating lentic recreational fisheries catch and effort across the United States
Recreational fisheries represent a socially, ecologically, and economically significant component of global fisheries. The U.S. Inland Creel and Angler Survey Catalog (CreelCat) database includes inland recreational fisheries survey data across the United States to facilitate large-scale analyses. However, because survey methods differ, a statistical method capable of integrating these...
Authors
Matthew Robertson, Stephen R. Midway, Holly Susan Embke, Anna Kaz, Mitchel Lang, Craig P. Paukert, Nicholas A. Sievert, Lyndsie S. Wszola, Abigail J. Lynch
AIMS for wildlife: Developing an automated interactive monitoring system to integrate real-time movement and environmental data for true adaptive management AIMS for wildlife: Developing an automated interactive monitoring system to integrate real-time movement and environmental data for true adaptive management
To effectively manage species and habitats at multiple scales, population and land managers require rapid information on wildlife use of managed areas and responses to landscape conditions and management actions. GPS tracking studies of wildlife are particularly informative to species ecology, habitat use, and conservation. Combining GPS data with administrative data and a diverse suite...
Authors
Michael L. Casazza, Austen Lorenz, Cory T. Overton, Elliott L. Matchett, Andrea Lynn Mott, Desmond Alexander Mackell, Fiona McDuie