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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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Estimating GPS-based social aggregation metrics using collar data Estimating GPS-based social aggregation metrics using collar data

Understanding social aggregation patterns in ungulate herds is essential for gaining behavioral insights, optimizing resource use, reducing human-wildlife conflict, and managing disease risk. As chronic wasting disease is the preeminent disease-related threat to cervid populations in North America, knowledge of contact between individuals and spatiotemporal patterns of aggregation...
Authors
William Michael Janousek, Gavin G. Cotterill, Olivia J. Lobo, Eric K. Cole, Sarah R. Dewey, Tabitha A. Graves

Semantic segmentation of light-toned veins in multimodal ChemCam data Semantic segmentation of light-toned veins in multimodal ChemCam data

Since the Mars Science Laboratory landed in 2012, the ChemCam instrument aboard the rover has collected in-situ laser-induced breakdown spectroscopy (LIBS) data and context images along more than 35 km of the Gale Crater traverse, providing valuable observations including diagenetic features such as light-toned veins. These veins are of particular scientific interest because they are...
Authors
Ana Lomashvili, Kristin Rammelkamp, Protim Bhattacharjee, Olivier Gasnault, Elise Clavé, Christoph H. Egerland, Susanne Schröder, Travis S.J. Gabriel, Ari Essunfeld, Stéphane Le Mouélic, Begüm Demir

Describing the seasonal abundance and growth rates of larval fishes across productivity gradients in Lake Huron in 2017 Describing the seasonal abundance and growth rates of larval fishes across productivity gradients in Lake Huron in 2017

Several of the Laurentian Great Lakes, including Lake Huron, have undergone oligotrophication in the past decades and prey fish biomass has concomitantly declined. One potential mechanism to explain declines in prey fish is slower growth and lower survival at the larval stage. To determine whether reduced productivity affects the growth of larval fish, we sampled larval fishes and their
Authors
David B. Bunnell, Lauren A. Eaton, Patricia M. Dieter, Paris D. Collingsworth, Joel C. Hoffman, Mark D. Rowe, Wendylee Stott, Amanda Susanne Ackiss, Edward S. Rutherford

Ecology of Lake Erie – Wetlands and lake-wide planktonic communities: A synthesis Ecology of Lake Erie – Wetlands and lake-wide planktonic communities: A synthesis

No abstract available.
Authors
Stuart A. Ludsin, Mohiuddin Munawar, Anna G. Boegehold, D. Andrew R. Drake, Kurt P. Kowalski, Lauren M. Pintor

Abundance and movement patterns of fish accessing a reconnected Lake Erie coastal wetland: Insights from high-resolution sonar data Abundance and movement patterns of fish accessing a reconnected Lake Erie coastal wetland: Insights from high-resolution sonar data

Coastal wetlands of the Laurentian Great Lakes are complex ecosystems that provide essential biological services, including providing habitat for a suite of fish species. As restoration efforts for these coastal wetlands increase, there is a need to characterize how well restored areas support the life histories of wetland, riverine, and lake fishes. Most traditional survey methods (e.g...
Authors
Kurt P. Kowalski, Alexandra A. Bozimowski, McKenzie K.H. Smith, Michael R. Eggleston, Maxwell F. Ramsay, Holly J. Eschenburg

A chromosome-level genome assembly of a vernal pool specialist amphibian, the Western Spadefoot, Spea hammondii A chromosome-level genome assembly of a vernal pool specialist amphibian, the Western Spadefoot, Spea hammondii

We assembled and annotated a chromosome-level genome for the Western Spadefoot, Spea hammondii (Anura, Scaphiopodidae) representing one of only three amphibians included in the California Conservation Genomics Project (CCGP). Spea hammondii is a vernal pool breeding anuran native to California and northwestern Baja California which has undergone both range contractions and local...
Authors
Ben Thompsky, Eric Beraut, Robert D. Cooper, Merly Escalona, Robert E. Espinoza, Robert N. Fisher, Courtney Miller, Oanh Nguyen, Samuel Sacco, Ruta Sahasrabudhe, William E. Seligmann, Erin Tofflemier, Ian J. Wang, H. Bradley Schaffer

Mineral chemistry perspective on remobilization of stored magma at Kamakai'a Hills, Southwest Rift Zone of Kilauea, Island of Hawai'i, USA Mineral chemistry perspective on remobilization of stored magma at Kamakai'a Hills, Southwest Rift Zone of Kilauea, Island of Hawai'i, USA

Differentiated magmas stored in the rift zones of Kīlauea have received more attention in recent years following eruption of andesite during the early phase of 2018 lower East Rift Zone activity. Despite this growing interest, some of the most voluminous eruptions of differentiated rift zone magmas remain poorly studied. One such eruption, and the most voluminous exposed differentiated...
Authors
Drew T. Downs, May Sas

How wildlife respond to tropical cyclones: Short-term tactics and long-term impacts How wildlife respond to tropical cyclones: Short-term tactics and long-term impacts

From butterflies to lizards and from sharks to seabirds, wildlife exhibit tactics to survive the impacts of tropical cyclones, also known as hurricanes, cyclones, or typhoons depending on where they occur. Some species seek refuge during the storm by moving, some remain in place and ride it out, and others move longer distances, avoiding the main impacts of the storm altogether. Tropical...
Authors
Erin L. Koen, Mohamed Khalil Meliane, Zachery B. Holmes, Karl E. Miller, William J. Barichivich, Emilie Dedeban, Alex Furst, Miranda Imeri, Peyton E. Niebanck, Samantha Nunn, Kailee Pearson, Nicole Rita, Brier Ryver, Dakotah Shaffer, Susan C. Walls, E. Hance Ellington

Influence of modeling assumptions on pedestrian evacuation success for non-eruptive lahar hazards at Mount Rainier, Washington Influence of modeling assumptions on pedestrian evacuation success for non-eruptive lahar hazards at Mount Rainier, Washington

Previous efforts to characterize lahar threats posed to communities downstream of volcanoes have focused primarily on delineating hazard zones that lack information on lahar-arrival times and exposure estimates that implicitly treat threats to be the same regardless of distance from the volcano. Estimated lahar-arrival times, travel times for individuals to leave hazard zones, and...
Authors
Nathan J. Wood, Jeff Peters

Fifteen years of WRTDS for advancing water-quality science: A critical review of methodological developments and global applications Fifteen years of WRTDS for advancing water-quality science: A critical review of methodological developments and global applications

Contamination by nutrients, major ions, and metals poses a major threat to global water sustainability. Understanding how these pollutants vary across time and space requires long-term monitoring and robust statistical approaches. Traditional methods, however, often struggle to account for streamflow variability, seasonality, and nonlinear responses. Introduced in 2010, the Weighted...
Authors
Qian Zhang, Robert M. Hirsch, Laura A. DeCicco, Jennifer C. Murphy

Towards affordable wetland evapotranspiration monitoring using the Variance-Bowen Ratio method: Insights from three contrasting wetlands Towards affordable wetland evapotranspiration monitoring using the Variance-Bowen Ratio method: Insights from three contrasting wetlands

Accurate measurement of evapotranspiration (ET) is essential for sustainable water management. Standard methods such as eddy covariance (EC) are costly, while alternatives such as surface renewal are cheaper but require calibration and complex data processing. This study evaluates the utility of the Variance-Bowen Ratio (VBR) method for estimating ET across three California’s wetlands...
Authors
Tianxin Wang, Gabriel B. Senay, Joseph Verfaille, Daphne J. Szutu, MacKenzie Friedrichs, Jack R. Eggleston, Dennis Baldocchi
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