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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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Two-stage models improve machine learning classifiers in wildlife research: A case study in identifying false positive detections of Ruffed Grouse Two-stage models improve machine learning classifiers in wildlife research: A case study in identifying false positive detections of Ruffed Grouse

Autonomous recording units are increasingly being used to monitor wildlife on large geographic and temporal scales, paired with machine learning (ML) to automate detection of wildlife. However, false positive detections from ML classifiers can result in erroneous ecological models that can lead to misguided management and conservation actions. We used a two-stage general approach to...
Authors
Laurence A. Clarfeld, Katherina D. Gieder, Robert Abrams, Christopher Bernier, Joseph Cahill, Susan Staats, Scott Wixsom, Therese M. Donovan

Oligocene–Miocene development and evolution of the south Dome Rock Mountains basin, lower Colorado River corridor, Arizona, USA Oligocene–Miocene development and evolution of the south Dome Rock Mountains basin, lower Colorado River corridor, Arizona, USA

Sedimentary basins in the Colorado River extensional corridor record large-magnitude Basin and Range extension and younger dextral shear deformation in the evolving Pacific−North America plate boundary. The south Dome Rock Mountains basin is located in west-central Arizona (USA), where the history of basin evolution, style of deformation, and timing of the transition between extension...
Authors
Timothy A. Brickey, Paul J. Umhoefer, Scott E.K. Bennett, Christine Regalla, Nancy R. Riggs, Skyler Pendleton Mavor

Exposure to ultraviolet radiation induces escape hatching of Cisco (Coregonus artedi) embryos Exposure to ultraviolet radiation induces escape hatching of Cisco (Coregonus artedi) embryos

Cisco (Otoonapii in Ojibwe; Coregonus artedi Lesueur, 1818), is a widely distributed stenothermic freshwater fish whose embryos typically incubate under ice and in the dark. We used Cisco as a model organism for testing the potential of UV-induced escape hatching behaviour. Owing to reduced ice cover and increased water transparency in north temperate lakes, these experiments provide...
Authors
Nicole Lynn Berry, David Bunnell, Erin P. Overholt, Jennifer A. Schumacher, Addison Z. Almeda, Casey W. Schoenebeck, Peter C. Jacobson, Kristopher Dey, Jason B. Smith, Andrew Tucker, Thomas J. Fisher, Elizabeth M. Mette, Bradley N. Carlson, Gretchen J.A. Hansen, Tyler D. Ahrenstorff, Derek L. Bahr, Kevin M. Keeler, Brian Weidel, Abigail J. Lynch, Craig E. Williamson

Assessing shifting technology in genetic monitoring of the North American plains bison Federal conservation herds Assessing shifting technology in genetic monitoring of the North American plains bison Federal conservation herds

Human expansion is a major driver of both declining wildlife abundance and the contraction of species’ distributions, increasing the risk of genetic erosion and the need for genetic monitoring. Rapidly advancing technology has expanded the types of genetic data that are available for wildlife conservation. However, inferences from different genetic markers could result in different...
Authors
Shawna J Zimmerman, Rachael Marie Giglio, Chris Geremia, Lee C. Jones, Blake McCann, Timothy J Smyser, Brendan J Moynahan, Sara J. Oyler-McCance

The tortoise and the antilocaprid: Adapting GPS tracking and terrain data to model wildlife walking functions The tortoise and the antilocaprid: Adapting GPS tracking and terrain data to model wildlife walking functions

Context The relationship between slope and terrestrial animal locomotion is key to landscape ecology but underexplored across species. This is partly due to a lack of scalable methodology that applies to a diversity of wildlife. Objectives This study investigates the slope-speed relationship for two species, Texas tortoise (Gopherus berlandieri) and pronghorn (Antilocapra americana)...
Authors
Samuel Norton Chambers, Joshua W. von Nonn, Matthew Alexander Burgess, Lance R. Brady, Jeffrey Bracewell, Daniel A. Guerra, Miguel L. Villarreal

A framework tool that applies weight-of-evidence integration to the analysis of existing datasets to guide freshwater conservation A framework tool that applies weight-of-evidence integration to the analysis of existing datasets to guide freshwater conservation

The overarching issue we address here is how to extract clear and actionable ecological and management insights from real-world field data that often do not satisfy traditional statistical assumptions. Toward this goal, we developed a general 12+6 step adaptive management framework tool. We applied this framework tool to existing biodiversity monitoring data to create a proof-of-concept...
Authors
Olivia Rode, Martha E. Mather, Devon Oliver, Katherine Nelson, Victoria Reed, Trisha Moore, Suyash Pratap

Bridging social and ecological science to create spatially-explicit models of human-caused mortality of carnivores Bridging social and ecological science to create spatially-explicit models of human-caused mortality of carnivores

Research indicates that human-caused mortality (HCM) is a key factor limiting numerous large carnivore populations. However, efforts to represent HCM in spatially explicit models have generally been limited in scope—often relying on proxies, such as road or human density. Yet such efforts fail to distinguish different sources of HCM, which can arise from different antecedent processes...
Authors
Jeremy T. Bruskotter, Neil H. Carter, Richard Eugene Waggaman Berl, Joseph W. Hinton, Jazmin Murphy, L. Mark Elbroch, John A. Vucetich

Integrating marine historical ecology into management of Alaska’s Pacific cod fishery for climate readiness Integrating marine historical ecology into management of Alaska’s Pacific cod fishery for climate readiness

The Pacific cod (Gadus macrocephalus) fishery was closed in 2020 after a rapid decline in biomass caused by the marine heat waves of 2014–2019. Pacific cod are exceptionally thermally sensitive and management of this fishery is now challenged by increasingly unpredictable climate conditions. Fisheries monitoring is critical for climate readiness, but short-term monitoring data may be...
Authors
Catherine F. West, Loren McClenachan, Steven J. Barbeaux, Ingrid B. Spies, Jason A. Addison, Bruce T. Anderson, Courtney A. Hofman, Katherine L. Reedy, Emma A. Elliott Smith, Michael A. Etnier, Thomas E. Helser, Bruce P. Finney

Comparison of two benthic assemblage sampling gears for use on intertidal oyster reefs in Louisiana Comparison of two benthic assemblage sampling gears for use on intertidal oyster reefs in Louisiana

Background Estuarine biodiversity plays a vital role in supporting ecosystem functions yet remains threatened by climate change and anthropogenic activity. Tracking and identifying estuarine biodiversity trends helps management ensure long-term provisions of human and environmental benefits by contributing to the estimation of habitat loss and the monitoring of restoration and...
Authors
Finella M. Campanino, Stephanie K. Archer, Jillian C. Tuptiza, Cassandra N. Glaspie, Megan La Peyre

Three decades of World Recreational Fishing Conferences: What have we learned about the dynamics of recreational fisheries? Three decades of World Recreational Fishing Conferences: What have we learned about the dynamics of recreational fisheries?

Recreational fishing extends beyond catching fish, connecting individuals with nature, generating environmental stewards and contributing significantly to both local, regional and national economies. Assessing potential impacts on ecosystems and social-ecological systems requires dedicated multi- and interdisciplinary research and integrative management and policy approaches. Managing...
Authors
Valerio Sbragaglia, Robert Arlinghaus, Faith Ochwada-Doyle, Holly Susan Embke, Lucas P Griffin, Taylor Hunt

Increased flood exposure in the Pacific Northwest following earthquake-driven subsidence and sea-level rise Increased flood exposure in the Pacific Northwest following earthquake-driven subsidence and sea-level rise

Climate-driven sea-level rise is increasing the frequency of coastal flooding worldwide, exacerbated locally by factors like land subsidence from groundwater and resource extraction. However, a process rarely considered in future sea-level rise scenarios is sudden (over minutes) land subsidence associated with great (>M8) earthquakes, which can exceed 1 m. Along the Washington, Oregon...
Authors
Tina Dura, William Chilton, David Small, Andra Garner, Andrea D. Hawkes, Diego Melgar, Simon E. Engelhart, Lydia M. Staisch, Robert C. Witter, Alan Nelson, Harvey Kelsey, Jonathan Allan, David S. Bruce, Jessica DePaolis, Mike Priddy, Richard W. Briggs, Robert Weiss, SeanPaul La Selle, Michael J. Willis, Benjamin P. Horton

Mapping predicted ecological states at landscape scales using remote sensing data and machine learning Mapping predicted ecological states at landscape scales using remote sensing data and machine learning

Dryland ecosystems, covering 45% of the Earth's land and supporting over one-third of the global population, face significant threats from land degradation and ecological state change. Managing these ecosystems is complex, and science-based frameworks like Ecological Site Descriptions and state-and-transition models are essential tools for guiding decisions to support ecological health...
Authors
Nathan J. Kleist, Christopher T. Domschke, Anna C. Knight, Travis W. Nauman, Michael C. Duniway, Sarah K. Carter
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