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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.
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Development and evaluation of the remote passive integrated transponder tag reader for customizable monitoring of wildlife Development and evaluation of the remote passive integrated transponder tag reader for customizable monitoring of wildlife
Increasing the quantity and quality of mark-reencounter data can be important when individual identification data are needed to address research or management questions. Physical recapture methods tend to be labor-intensive and therefore expensive, while remote detection methods are not easily applied to all taxa or are proprietary and thus difficult to customize. However, partnerships...
Authors
Staci M. Amburgey, Aadithya Prakash, Amy A. Yackel Adams, Shane R. Siers, Sarah J. Converse
Tracking diagenetic alteration of magnetic susceptibility in thrust ridge and slope basin sediments of the Cascadia margin (ODP Sites 1249 and 1252; IODP Site U1325) Tracking diagenetic alteration of magnetic susceptibility in thrust ridge and slope basin sediments of the Cascadia margin (ODP Sites 1249 and 1252; IODP Site U1325)
We investigated sediment core records from the Cascadia Margin (Ocean Drilling Program Sites 1249 and 1252 at Hydrate Ridge; Integrated Ocean Drilling Program Site U1325 offshore Vancouver Island) using a Zr/Rb heavy mineral proxy from X-ray fluorescence (XRF) core scanning to identify intervals of primary detrital magnetic susceptibility (κ) and predict intervals where diagenesis caused...
Authors
Stephen C. Phillips, Joel E. Johnson, William Clyde, Wei-Li Hong, Jacob Setera, Marta E. Torres
Landscape transcriptomic analysis detects thermal stress responses and potential adaptive variation in wild brook trout (Salvelinus fontinalis) during successive heatwaves Landscape transcriptomic analysis detects thermal stress responses and potential adaptive variation in wild brook trout (Salvelinus fontinalis) during successive heatwaves
Extreme weather events, such as heatwaves, are becoming more frequent and intense as a result of climate change. Critically, such extreme weather events can be more important drivers of extirpation and selection than changes in annual or seasonal averages and they pose a particularly large threat to poikilothermic organisms. In this study, we evaluated the transcriptomic response of a...
Authors
Justin Waraniak, Sarah Batchelor, Tyler Wagner, Jason Keagy
Flow cytometric detection of waterborne bacteria metabolic response to anthropogenic chemical inputs to aquatic ecosystems Flow cytometric detection of waterborne bacteria metabolic response to anthropogenic chemical inputs to aquatic ecosystems
Typical investigations into the biological consequences of suspected xenobiotics or nutrients introduced in watersheds include analytical chemistry screens of environmental samples—such as periphyton responses or studies of fish condition—which are all costly in terms of equipment, reagents, time, and human resources. An alternative is to assess pollutant effects on waterborne bacteria...
Authors
Jill Jenkins, Scott Mize, Darren Johnson, Bonnie L. Brown
ARCHI: A new R package for automated imputation of regionally correlated hydrologic records ARCHI: A new R package for automated imputation of regionally correlated hydrologic records
Missing data in hydrological records can limit resource assessment, process understanding, and predictive modeling. Here, we present ARCHI (Automated Regional Correlation Analysis for Hydrologic Record Imputation), a new, open-source software package in R designed to aggregate, impute, cluster, and visualize regionally correlated hydrologic records. ARCHI imputes missing data in “target”...
Authors
Zeno F. Levy, Robin L. Glas, Timothy J. Stagnitta, Neil C. Terry
Characterizing pyrethroid and fipronil concentrations in biosolids Characterizing pyrethroid and fipronil concentrations in biosolids
Pesticides are prevalent in wastewater, yet few studies have measured pesticides in biosolids and aqueous media from samples collected concurrently. Seventeen California wastewater treatment plants (WWTPs) were sampled in May 2020. Biosolids samples were analyzed for 27 analytes, and paired aqueous samples (influent and effluent) were analyzed for 23 analytes. Analytes included fipronil...
Authors
John Wheeler, Gabrielle Pecora Black, Michelle L. Hladik, Corey Sanders, Jennifer Teerlink, Luann Wong, Xuyang Zhang, Robert Budd, Thomas M Young
Avian influenza infection and antibodies not identified in eastern wild turkeys (Meleagris gallopavo silvestris) sampled on the Delmarva Peninsula Avian influenza infection and antibodies not identified in eastern wild turkeys (Meleagris gallopavo silvestris) sampled on the Delmarva Peninsula
Although highly pathogenic avian influenza presents a notable threat to domestic turkeys (Meleagris gallopavo domesticus), there have been minimal infections identified in wild turkeys (Meleagris gallopavo) across the United States. Indeed, recent infections in wild turkeys have either been linked back to or suspected to be the result of spillback from nearby infected domestic turkeys...
Authors
Jeffery D. Sullivan, Johanna Alexandra Harvey, Rebecca L. Poulson, David E. Stallknecht, C. Robert Long, Cindy P. Driscoll, Diann J. Prosser, Jennifer M. Mullinax
The role of bedrock circulation depth and porosity in mountain streamflow response to prolonged drought The role of bedrock circulation depth and porosity in mountain streamflow response to prolonged drought
Quantitative understanding is lacking on how the depth of active groundwater circulation in bedrock affects mountain streamflow response to a multi‐year drought. We use an integrated hydrological model to explore the sensitivity of a variety of streamflow metrics to bedrock circulation depth and porosity under a plausible extreme drought scenario lasting up to 5 years. Endmember depth...
Authors
Rosemary W.H. Carroll, Andrew H. Manning, Kenneth H. Williams
Laboratory assessment for recovery of porcine circovirus 2 and porcine reproductive and respiratory syndrome virus using two types of commercially available hollow-fiber ultrafilters Laboratory assessment for recovery of porcine circovirus 2 and porcine reproductive and respiratory syndrome virus using two types of commercially available hollow-fiber ultrafilters
Groundwater near swine farms is an uninvestigated reservoir for porcine reproductive and respiratory syndrome virus (PRRSV) and porcine circoviruses (PCVs). Enteric microorganisms are often collected from groundwater via dead-end ultrafiltration, but recovery of PRRSV and PCV with this method has not been assessed. We recovered PRRSV2 and PCV2 by dead-end ultrafiltration followed by...
Authors
Aaron D. Firnstahl, Gabi Doughan, Sarah A. Opelt, Rachel M. Cook, Joseph Heffron, Karen Krueger, Mark A. Borchardt, Locke Karriker, Joel P. Stokdyk, Tucker R. Burch
Analyzing multi-year nitrate concentration evolution in Alabama aquatic systems using a machine learning model Analyzing multi-year nitrate concentration evolution in Alabama aquatic systems using a machine learning model
Rising nitrate contamination in water systems poses significant risks to public health and ecosystem stability, necessitating advanced modeling to understand nitrate dynamics more accurately. This study applies the long short-term memory (LSTM) modeling to investigate the hydrologic and environmental factors influencing nitrate concentration dynamics in rivers and aquifers across the...
Authors
Bahareh KarimiDermani, Christopher Green, Geoffrey Tick, Hossein Gholizadeh, Wei Wei, Yong Zhang
Migration of seismicity from the mantle to the upper crust beneath Harrat Lunayyir volcanic field, Saudi Arabia Migration of seismicity from the mantle to the upper crust beneath Harrat Lunayyir volcanic field, Saudi Arabia
Harrat Lunayyir is a volcanic field in Saudi Arabia that experienced a Mw~5.4 earthquake driven by an upper-crustal dike intrusion in May 2009. This volcanic field has exhibited numerous forms of volcanic seismicity both prior to and since the 2009 dike intrusion. Significantly, earthquakes within the lithospheric mantle and, rarely, the lower crust are present in the two-decade long...
Authors
Alexander R. Blanchette, Simon L. Klemperer, Walter D. Mooney, Turki A. Sehli
Impact of thermoelectric power plant operations and water use reporting methods on thermoelectric power plant water use Impact of thermoelectric power plant operations and water use reporting methods on thermoelectric power plant water use
Thermoelectric power generation accounts for over 41% of total U.S. freshwater withdrawals, making understanding the determinants of power plants’ water withdrawals (WW) and consumption (WC) critical for reducing the sector’s reliance on increasingly scarce water resources. However, reported data inconsistencies and incomplete analysis of potential determinants of thermoelectric water...
Authors
Eric Sjostedt, Richard Rushforth, Vincent Tidwell, Melissa A. Harris, Ryan McManamay, Landon Marston