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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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Evidence that copepod biomass during the larval period regulates recruitment of Lake Erie walleye Evidence that copepod biomass during the larval period regulates recruitment of Lake Erie walleye

Walleye (Sander vitreus) is an economically and culturally important species in Lake Erie that has experienced large interannual variability in recruitment. We examined the importance of prey biomass during the larval period to walleye recruitment while also considering the importance of temperature. Using nine years of field data over a 22-year period (1994–2016) for larval walleye and
Authors
Cassandra J. May, R. Budnik, S. Ludsin, D. O’Donnell, James M. Hood, Edward F. Roseman, E. Marschall

An opportunistic survey reveals an unexpected coronavirus diversity hotspot in North America An opportunistic survey reveals an unexpected coronavirus diversity hotspot in North America

In summer 2020, Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) was detected on mink farms in Utah. An interagency One Health response was initiated to assess the extent of the outbreak and included sampling animals from on or near affected mink farms and testing them for SARS-CoV-2 and non-SARS coronaviruses. Among the 365 animals sampled, including domestic cats, mink...
Authors
Hon S. Ip, Kathryn M. Griffin, Jeffrey D. Messer, Megan Winzeler, Susan A. Shriner, Mary Lea Killian, Mia K. Torchetti, Thomas J. DeLiberto, Brian R. Amman, Caitlin M. Cossaboom, R. Reid Harvey, Natalie M. Wendling, Hannah Rettler, Dean Taylor, Jonathan S. Towner, Casey Barton Behravesh, David S. Blehert

Identifying negative sentiment polarity in the Judas technique Identifying negative sentiment polarity in the Judas technique

In the context of conservation science and management, the Judas technique refers to outfitting an animal (a Judas animal) with a radio transmitter or other identifier so that its movements can be tracked to locate conspecifics. Although this term is commonly used, some consider it offensive due to historical associations of the word Judas with anti-Semitic sentiments. Thus, the term has...
Authors
Austin Lee Fitzgerald, Jillian Maureen Josimovich, Charlotte J. Robinson, Robert Reed, Andrea Faye Currylow

New-generation pesticides are prevalent in California's Central Coast streams New-generation pesticides are prevalent in California's Central Coast streams

Pesticides are widely recognized as important biological stressors in streams, especially in heavily developed urban and agricultural areas like the Central California Coast region. We assessed occurrence and potential toxicity of pesticides in small streams in the region using two analytical methods: a broad-spectrum (223 compounds) method in use since 2012 and a newly developed method...
Authors
Mark W. Sandstrom, Lisa H. Nowell, Barbara Mahler, Peter C. Van Metre

A riverscape approach reveals downstream propagation of stream thermal responses to riparian thinning at multiple scales A riverscape approach reveals downstream propagation of stream thermal responses to riparian thinning at multiple scales

Hydrological connectivity in river networks influences their response to environmental changes as local effects may extend downstream via flowing water. For example, localized changes in riparian forest conditions can affect stream temperatures, and these effects may propagate downstream. However, studies evaluating stream temperature responses to riparian forest management have not...
Authors
David A. Roon, Jason B. Dunham, Christian E. Torgersen

Earthcasting: Geomorphic forecasts for society Earthcasting: Geomorphic forecasts for society

Over the last several decades, the study of Earth surface processes has progressed from a descriptive science to an increasingly quantitative one due to advances in theoretical, experimental, and computational geosciences. The importance of geomorphic forecasts has never been greater, as technological development and global climate change threaten to reshape the landscapes that support...
Authors
Behrooz Ferdowsi, John D. Gartner, Kerri N. Johnson, Alan Kasprak, Kimberly L. Miller, William Nardin, Alejandra C. Ortiz, Alejandro Tejedor

Exposure to Deepwater Horizon crude oil increases free cholesterol in larval red drum (Sciaenops ocellatus) Exposure to Deepwater Horizon crude oil increases free cholesterol in larval red drum (Sciaenops ocellatus)

The 2010 Deepwater Horizon oil spill impacted over 2100 km of shoreline along the northern Gulf of Mexico, which coincided with the spawning season of many coastal species, including red drum (Sciaenops ocellatus). Red drum develop rapidly and are sensitive to crude oil exposure during the embryonic and larval periods. This study investigates the predictions from recent transcriptomic...
Authors
Victoria McGruer, Alexis J. Khursigara, Jason T. Magnuson, Andrew J. Esbaugh, Justin Blaine Greer, Daniel Schlenk

STEPS: Slip time earthquake path simulations applied to the San Andreas and Toe Jam Hill Faults to redefine geologic slip rate uncertainty STEPS: Slip time earthquake path simulations applied to the San Andreas and Toe Jam Hill Faults to redefine geologic slip rate uncertainty

Geologic slip rates are a time-averaged measurement of fault displacement calculated over hundreds to million-year time scales and are a primary input for probabilistic seismic hazard analyses, which forecast expected ground shaking in future earthquakes. Despite their utility for seismic hazard calculations, longer-term geologic slip rates represent a time-averaged measure of the tempo...
Authors
Alexandra Elise Hatem, Ryan D. Gold, Richard W. Briggs, Katherine M. Scharer, Edward H. Field

A global ecological classification of coastal segment units to complement marine biodiversity observation network assessments A global ecological classification of coastal segment units to complement marine biodiversity observation network assessments

A new data layer provides Coastal and Marine Ecological Classification Standard (CMECS) labels for global coastal segments at 1 km or shorter resolution. These characteristics are summarized for six US Marine Biodiversity Observation Network (MBON) sites and one MBON Pole to Pole of the Americas site in Argentina. The global coastlines CMECS classifications were produced from a...
Authors
Roger Sayre, Kevin Butler, Keith Van Graafeiland, Sean Breyer, Dawn Wright, Charlie Frye, Deniz Karagulle, Madeline T. Martin, Jill Janene Cress, Tom Allen, Rebecca Allee, Rost Parsons, Bjorn Nyberg, Mark Costello, Peter Harris, Frank Muller-Karger

Vertical movement of soluble carbon and nutrients from biocrusts to subsurface mineral soils Vertical movement of soluble carbon and nutrients from biocrusts to subsurface mineral soils

Dryland ecosystems can be constrained by low soil fertility. Within drylands, the soil nutrient and organic carbon (C) cycling that does occur is often mediated by soil surface communities known as biological soil crusts (biocrusts), which cycle C and nutrients in the top ca. 0–2 cm of soil. However, the degree to which biocrusts are influencing soil fertility and biogeochemical cycling...
Authors
Kristina E. Young, Scott Ferrenberg, Robin H. Reibold, Sasha C. Reed, Tami Swenson, Trent Northen, Anthony Darrouzet-Nardi

Augmentation of natural prey reduces cattle predation by puma (Puma concolor) and jaguar (Panthera onca) on a ranch in Sonora, Mexico Augmentation of natural prey reduces cattle predation by puma (Puma concolor) and jaguar (Panthera onca) on a ranch in Sonora, Mexico

Retaliatory killing of large carnivores due to livestock predation is one of the major threats for the conservation of many declining populations of predators. According to empirical observations, there is a higher incidence of livestock predation when native prey abundance is low. In this study, we applied a treatment consisting of augmentation of prey abundance by translocation of...
Authors
Ivonne Cassaigne, Ron W. Thompson, Rodrigo A. Medellin, Melanie Culver, Alexander Ochoa, Karla Vargas, Jack L. Childs, Manuel Galaz, Jim Sanderson

Evaluating lava flow propagation models with a case study from the 2018 eruption of Kīlauea Volcano, Hawai'i Evaluating lava flow propagation models with a case study from the 2018 eruption of Kīlauea Volcano, Hawai'i

The 2018 lower East Rift Zone (LERZ) eruption of Kīlauea, Hawai’i, provides an excellent natural laboratory with which to test models of lava flow propagation. During early stages of eruption crises, the most useful lava flow propagation equations utilize readily determined parameters and require fewer a priori assumptions about future behavior of the flow. Here, we leverage the numerous
Authors
Rebecca deGraffenried, Julia E. Hammer, Hannah R. Dietterich, Ryan L. Perroy, Matthew R. Patrick, Thomas Shea
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