Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 9967
Isolating the AFFF signature in coastal watersheds using oxidizable PFAS precursors and unexplained organofluorine
Water supplies for millions of U.S. individuals exceed maximum contaminant levels for per- and polyfluoroalkyl substances (PFAS). Contemporary and legacy use of aqueous film forming foams (AFFF) is a major contamination source. However, diverse PFAS sources are present within watersheds, making it difficult to isolate their predominant origins. Here we examine PFAS source signatures among six adja
Authors
Bridger J. Ruyle, Heidi M. Pickard, Denis R. LeBlanc, Andrea K. Tokranov, Colin P. Thackray, Xindi C. Hu, Chad D. Vecitis, Elsie M. Sunderland
Reproduction
Lake charr Salvelinus namaycush are typically fall spawners although one ecotype has populations that spawn during spring and fall (siscowets in Lake Superior). Lake charr are iteroparous (reproduce more than once in a lifetime) with group-synchronous ovarian development and typically spawn once per year. However, lake charr may not reproduce every year, a phenomenon known as skipped spawning. Fre
Authors
Frederick W. Goetz, J. Ellen Marsden, Catherine A. Richter, Donald E. Tillitt, Shawn P. Sitar, Stephen Riley, Charles C. Krueger
Practical field survey operations for flood insurance rate maps
The U.S. Geological Survey assists the Federal Emergency Management Agency in its mission to identify flood hazards and zones for risk premiums for communities nationwide, by creating flood insurance rate maps through updating hydraulic models that use river geometry data. The data collected consist of elevations of river channels, banks, and structures, such as bridges, dams, and weirs that can a
Authors
Nicholas J. Taylor, Caelan E. Simeone
An increase in the slope of the concentration-discharge relation for total organic carbon in major rivers in New England, 1973 to 2019
The mobilization and transport of organic carbon (OC) in rivers and delivery to the near-coastal ocean are important processes in the carbon cycle that are affected by both climate and anthropogenic activities. Riverine OC transport can affect carbon sequestration, contaminant transport, ocean acidification, the formation of toxic disinfection by-products, ocean temperature and phytoplankton produ
Authors
Thomas G. Huntington, Michael Wieczorek
Review of the invasive Asian clam Corbicula spp. (Bivalvia: Cyrenidae) distribution in North America, 1924–2019
The bivalve Corbicula is one of the most successful aquatic mollusk invaders in the world. Since being introduced to North America from its native range in Asia, it has dispersed widely over a large portion of the continent from southern Canada to Panama. The first evidence of its introduction in the Western Hemisphere was discovered in 1924 in British Columbia, Canada. A review of distribution
Authors
Amy J. Benson, James D. Williams
Long-term carbon sinks in marsh soils of coastal Louisiana are at risk to wetland loss
Coastal marshes are essential habitats for soil carbon accumulation and burial, which can influence the global carbon budget. Coastal Louisiana has extensive marsh habitats (fresh, intermediate, brackish, and saline) where soil cores were collected to a depth of 100 cm at 24 sites to assess long-term carbon accumulation and burial rates. Select soil depth intervals were analyzed for bulk density,
Authors
Melissa M. Baustian, Camille Stagg, Carey L. Perry, Leland C. Moss, Tim J. B. Carruthers
Gulf of Mexico blue hole harbors high levels of novel microbial lineages
Exploration of oxygen-depleted marine environments has consistently revealed novel microbial taxa and metabolic capabilities that expand our understanding of microbial evolution and ecology. Marine blue holes are shallow karst formations characterized by low oxygen and high organic matter content. They are logistically challenging to sample, and thus our understanding of their biogeochemistry and
Authors
N.V. Patin, Z.A. Dietrich, A. Stancil, M. Quinan, J.S. Beckler, E. R. Hall, J Culter, Christopher G. Smith, Martial Taillefert, F.J. Stewart
Re‐purposing groundwater flow models for age assessments: Important characteristics
Groundwater flow model construction is often time‐consuming and costly, with development ideally focused on a specific purpose, such as quantifying well capture from water bodies or providing flow fields for simulating advective transport. As environmental challenges evolve, the incentive to re‐purpose existing groundwater flow models may increase. However, few studies have evaluated which charact
Authors
Paul F. Juckem, J. Jeffrey Starn
National-scale reservoir thermal energy storage pre-assessment for the United States
The U.S. Geological Survey is performing a pre-assessment of the cooling potential for reservoir thermal energy storage (RTES) in five generalized geologic regions (Basin and Range, Coastal Plains, Illinois Basin, Michigan Basin, Pacific Northwest) across the United States. Reservoir models are developed for the metropolitan areas of eight cities (Albuquerque, New Mexico; Charleston, South Carolin
Authors
Jeff D. Pepin, Erick R. Burns, Jesse E. Dickinson, Leslie L. Duncan, Eve L. Kuniansky, Howard W. Reeves
Tropicalization of temperate ecosystems in North America: The northward range expansion of tropical organisms in response to warming winter temperatures
Tropicalization is a term used to describe the transformation of temperate ecosystems by poleward‐moving tropical organisms in response to warming temperatures. In North America, decreases in the frequency and intensity of extreme winter cold events are expected to allow the poleward range expansion of many cold‐sensitive tropical organisms, sometimes at the expense of temperate organisms. Althoug
Authors
Michael Osland, Philip Stevens, Margaret Lamont, Richard Brusca, Kristen Hart, Hardin Waddle, Catherine Langtimm, Caroline Williams, Barry Keim, Adam Terando, Eric Reyier, Katie Marshall, Michael E. Loik, Ross Boucek, Amanda Lewis, Jeffrey A. Seminoff
Production of haploid gynogens to inform genomic resource development in the paleotetraploid pallid sturgeon (Scaphirhynchus albus)
Order Acipenseriformes (sturgeons and paddlefishes) is an ancient lineage of osteichthyan fishes (>200 million years old) with most extant species at conservation risk. A relatively basal species, the pallid sturgeon, Scaphirhynchus albus, is a federally endangered species native to the Mississippi and Missouri River basins. Hybridization with sympatric shovelnose sturgeon, S. platorynchus, is one
Authors
Richard Flamio Jr., Kimberly Chojnacki, Aaron J. Delonay, Marlene J Dodson, Rachel M. Gocker, Jill Jenkins, Jeffrey Powell, Edward J. Heist
Feral swine as sources of fecal contamination in recreational waters
Recreational waters are primary attractions at many national and state parks where feral swine populations are established, and thus are possible hotspots for visitor exposure to feral swine contaminants. Microbial source tracking (MST) was used to determine spatial and temporal patterns of fecal contamination in Congaree National Park (CONG) in South Carolina, U.S.A., which has an established pop
Authors
Anna M. McKee, Paul M. Bradley, David Shelley, Shea McCarthy, Marirosa Molina