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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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Chronic, low concentration pesticide exposure alters reproduction and behavior in the intertidal sea anemone, Anthopleura elegantissima Chronic, low concentration pesticide exposure alters reproduction and behavior in the intertidal sea anemone, Anthopleura elegantissima

Widespread pesticide and herbicide use paired with frequent transport away from application sites has led to pesticide presence in nearly all terrestrial and aquatic environments globally. Pesticides have unintentional toxic effects on non-target organisms by interfering with cellular processes, behavior, feeding, reproduction, and disrupting endocrine processes. The aggregating anemone
Authors
Bria Bleil, Elise Granek, Nathan Kirk, Michelle Hladik

Memory and jamming in fault zone sediments Memory and jamming in fault zone sediments

Many subsurface processes involve transitions in granular material states, from arrested to creeping to flowing. Experiments and frameworks for idealized systems reveal that granular fabrics develop during shearing, co-evolve with applied stress, and govern such transitions. We use microtomography to test whether fabrics at two San Andreas fault sites reflect slip history and whether...
Authors
Jhardel Dasent, Vashan Wright, Katherine M. Scharer, Michael Manga, Richard Kilburn

From sample to sonde to Sentinel-2: Insights from a multi-scale chlorophyll-a monitoring effort in the Hudson River, New York From sample to sonde to Sentinel-2: Insights from a multi-scale chlorophyll-a monitoring effort in the Hudson River, New York

Monitoring cyanobacteria and other nuisance phytoplankton in the Hudson River is of great interest given its societal and ecological importance. Satellite remote sensing provides a cost-effective method to monitor chlorophyll-a (chl-a), a common proxy for algal biomass; however, the dynamic nature of rivers complicates approaches traditionally applied to lakes and oceans. During 2021...
Authors
Wilson Salls, Robert J. Welk, Tyler King, Natasha Scavotto, Rebecca Gorney, Sabina Gifford, Michael Stouder, Elizabeth Nystrom, Jennifer Graham

Rice cultivation supports growth and survival of a threatened semi-aquatic reptile Rice cultivation supports growth and survival of a threatened semi-aquatic reptile

Integration of agroecosystems and other working landscapes with protected lands and waters is critical to the conservation of Earth's biodiversity. Rice agroecosystems support many species by providing aquatic habitat where natural wetlands have been altered or drained. In regions with long dry seasons, rice fields and associated irrigation canals provide essential habitat for wetland...
Authors
Jonathan Rose, Allison Nguyen, Anna Jordan, Daniel Antonio Macias, Elliot Schoenig, Giancarlo Ray Napolitano, Richard Kim, Julia Ersan, Alexandria Fulton, Brian Halstead

Seasonal movements of nonnative White Catfish in the Penobscot River estuary Seasonal movements of nonnative White Catfish in the Penobscot River estuary

Objective White Catfish Ameiurus catus has been introduced to coastal watersheds across the United States. In the Penobscot River, Maine, this species has become increasingly common in upstream habitats that have been made accessible by recent dam removals. We characterized the movements of White Catfish to understand the temporal variation in their movement patterns and contextualize...
Authors
Andrea N. Casey, Matthew A. Mensinger, Joseph Zydlewski

Predicting sediment bulk density for San Francisco Estuary Predicting sediment bulk density for San Francisco Estuary

Sediment bulk density (ρ-dry) and particle size are two important parameters for predicting sediment bed erosion. ρ-dry, however, is difficult to measure accurately. The units of ρdry have not been consistently reported in the literature, leading to confusion, particularly in the calculation of sediment budgets that typically require integrating mass-based and volumetric components...
Authors
Samantha C. McGill, Jessica Lacy

Downstream persistence of cyanobacteria in New Jersey's Raritan River basin Downstream persistence of cyanobacteria in New Jersey's Raritan River basin

Few studies have examined cyanobacteria persistence starting from lacustrine cyanobacteria harmful algal blooms (HABs) downstream. Multiple lakes and reservoirs within New Jersey's Raritan Basin Water Supply Complex (RBWSC) feature recurrent HABs and discharge water into the Raritan River. As the RBWSC provides drinking water to 1.5 million people, these HABs create drinking water...
Authors
Kyle Clonan, Meiyin Wu, Heather A. Heckathorn, Heather Desko, Eric Ernst, Pamela Reilly, Robert Schuster, Robert Newby, Annie Hurley, Alessandra Rossi

Biologging to identify nesting and non-nesting emergences for four species of imperiled sea turtles Biologging to identify nesting and non-nesting emergences for four species of imperiled sea turtles

Quantifying sea turtle nesting behavior is essential for recovery planning and evaluating management actions. Traditional monitoring approaches, based on nest counts from beach surveys, can misclassify non-nesting emergences, obscure true fecundity, and underestimate clutch frequency, metrics that directly influence population models and regulatory decisions. Here, we demonstrate that...
Authors
Kristen Hart, Connor White, Donna Shaver, Margaret Lamont, Michael Cherkiss, Andrew Crowder, Nicholas Whitney

Growth of a passive lava lake during the 2020–2021 eruption of Kīlauea volcano, Hawaii Growth of a passive lava lake during the 2020–2021 eruption of Kīlauea volcano, Hawaii

We investigate the growth of a passive lava lake in Halemaʻumaʻu crater during the December 2020 to May 2021 eruption of Kīlauea volcano, Hawaii. Fed by vents above their surfaces, the formation of passive lava lakes in topographic lows is an important process in the growth of basaltic volcanoes. We captured visible and thermal images during 17 helicopter overflights and applied...
Authors
Brett Carr, Matthew Patrick, Hannah R. Dietterich, Michael Zoeller, Carolyn Parcheta, Drew Downs, Patricia Nadeau, Christoper Hamilton

Environmental tradeoffs of urban stream restoration in Fairfax County, Virginia Environmental tradeoffs of urban stream restoration in Fairfax County, Virginia

Regulatory mandates to improve water quality and stream health have driven substantial investment in stream restoration. Most projects aim to improve channel-floodplain connectivity, reduce sediment erosion, and enhance habitat for aquatic organisms, yet few include adequate pre- and post-restoration monitoring to assess outcomes. Since 2007, Fairfax County, Virginia, and the U.S...
Authors
Aaron Porter, Christopher Ruck, Spencer Tassone

Early season tropical cyclones affect birds breeding on a barrier island Early season tropical cyclones affect birds breeding on a barrier island

Animal populations often experience acute natural disturbances, most of which are connected to short—term weather events. Occurrences of early—season tropical cyclones during the peak of the avian breeding season are likely to increase with climate change, which can substantially impact populations of coastal breeding birds at multiple scales. To understand the acute impacts of severe...
Authors
Theodore Zenzal, Amanda Anderson, Brock Geary, Jessica Schulz, Robert Dobbs, Wylie Barrow, Hardin Waddle
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