Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10386
Effects of water level alteration on carbon cycling in peatlands Effects of water level alteration on carbon cycling in peatlands
Globally, peatlands play an important role in the carbon (C) cycle. High water level is a key factor in maintaining C storage in peatlands, but water levels are vulnerable to climate change and anthropogenic disturbance. This review examines literature related to the effects of water level alteration on C cycling in peatlands to summarize new ideas and uncertainties emerging in this...
Authors
Yehui Zhong, Jiang Ming, Beth Middleton
Endocrine disrupting activities and geochemistry of water resources associated with unconventional oil and gas activity Endocrine disrupting activities and geochemistry of water resources associated with unconventional oil and gas activity
The rise of hydraulic fracturing and unconventional oil and gas (UOG) exploration in the United States has increased public concerns for water contamination induced from hydraulic fracturing fluids and associated wastewater spills. Herein, we collected surface and groundwater samples across Garfield County, Colorado, a drilling-dense region, and measured endocrine bioactivities...
Authors
Christopher D. Kassotis, Jennifer S. Harkness, Phuc H. Vo, Danh C. Vu, Kate Hoffman, Katelyn M. Cinnamon, Jennifer N. Cornelius-Green, Avner Vengosh, Chung-Ho Lin, Donald E. Tillitt, Robin L. Kruse, Jane A. McElroy, Susan C. Nagel
Assessing the ecological risks of per‐ and polyfluoroalkyl substances: Current state‐of‐the science and a proposed path forward Assessing the ecological risks of per‐ and polyfluoroalkyl substances: Current state‐of‐the science and a proposed path forward
Per‐ and poly‐fluoroalkyl substances (PFAS) encompass a large, heterogenous group of chemicals of potential concern to human health and the environment. Based on information for a few relatively well‐understood PFAS such as perfluorooctane sulfonate and perfluorooctanoate, there is ample basis to suspect that at least a subset can be considered persistent, bioaccumulative, and/or toxic...
Authors
Gerald T. Ankley, Philippa Cureton, Robert A. Hoke, Magali Houde, Anupama Kumar, Jessy Kurias, Roman P. Lanno, Chris McCarthy, John L. Newsted, Christopher J. Salice, Bradley E. Sample, Maria S. Sepúlveda, Jeffery A. Steevens, Sara Valsecchi
SurfRCaT: A tool for remote calibration of pre-existing coastal cameras to enable their use as quantitative coastal monitoring tools SurfRCaT: A tool for remote calibration of pre-existing coastal cameras to enable their use as quantitative coastal monitoring tools
The Surf-camera Remote Calibration Tool (SurfRCaT) is a Python-based software application to calibrate and rectify images from pre-existing video cameras that are operating at coastal sites in the United States. The software enables remote camera calibration and subsequent image rectification by facilitating the remote-extraction of ground control points using airborne lidar observations...
Authors
Matthew P. Conlin, Peter N Adams, Benjamin Wilkinson, Gregory Dusek, Margaret L. Palmsten, Jenna A. Brown
A global biophysical typology of mangroves and its relevance for ecosystem structure and deforestation A global biophysical typology of mangroves and its relevance for ecosystem structure and deforestation
Mangrove forests provide many ecosystem services but are among the world’s most threatened ecosystems. Mangroves vary substantially according to their geomorphic and sedimentary setting; while several conceptual frameworks describe these settings, their spatial distribution has not been quantified. Here, we present a new global mangrove biophysical typology and show that, based on their...
Authors
Thomas A. Worthington, Philine zu Ermgassen, Daniel A. Friess, Ken Krauss, Catherine E. Lovelock, Rick Tingey, Colin D. Woodroffe, Pete Bunting, N. Cormier, David Lagomasino, Richard Lucas, Nicholas J. Murray, William J. Sutherland, Mark Spalding
Resolving species boundaries in the critically imperiled freshwater mussel species, Fusconaia mitchelli (Bivalvia: Unionidae) Resolving species boundaries in the critically imperiled freshwater mussel species, Fusconaia mitchelli (Bivalvia: Unionidae)
Species are a fundamental unit of biology, and defining accurate species boundaries is integral to effective conservation and management of imperiled taxa. Freshwater mussels (Bivalvia: Unionidae) are among the most imperiled groups of organisms in North America, yet species boundaries remain uncertain for many taxa. The False Spike, Fusconaia mitchelli (Simpson in Dall, 1895), is a...
Authors
Chase H. Smith, Nathan Johnson, Kaitlyn Havlik, Robert D. Doyle, Charles R. Randklev
River channel response to dam removals on the lower Penobscot River, Maine, United States River channel response to dam removals on the lower Penobscot River, Maine, United States
Most geomorphology studies of dam removals have focused on sites with appreciable quantities of stored sediments. There is great interest in channel responses to sediment releases because of potential effects on aquatic and riparian habitats and human uses of these areas. Yet, behind many dams in the Northeast U.S. and other regions of the world only minor accumulations of sediment are...
Authors
Mathias J. Collins, Alice R. Kelley, Pamela J. Lombard
Genetic diversity targets and indicators in the CBD post-2020 Global Biodiversity Framework must be improved Genetic diversity targets and indicators in the CBD post-2020 Global Biodiversity Framework must be improved
The 196 parties to the Convention on Biological Diversity (CBD) will soon agree to a post-2020 global framework for conserving the three elements of biodiversity (genetic, species, and ecosystem diversity) while ensuring sustainable development and benefit sharing. As the most significant global conservation policy mechanism, the new CBD framework has far-reaching consequences- it will...
Authors
Sean M. Hoban, Michael W. Bruford, Josephine D’Urban Jackson, Margarida Lopes-Fernandes, Myriam Heuertz, Paul A. Hohenlohe, Per Sjogren-Gulve, Gernot Segelbacher, Cristiano Vernesi, Sally Aitken, Laura D. Bertola, Paulette Bloomer, Martin Breed, Hernando Rodriguez-Correa, W. Chris Funk, Catherine E. Grueber, Margaret Hunter, Rodolfo Jaffe, Libby Liggins, Joachim Mergeay, Farideh Moharrek, David O'Brien, Rob Ogden, Clarisse Palma-Silva, Ivan Paz-Vinas, Jennifer Pierson, Uma Ramakrishnan, Murielle Simo-Droissart, Naoki Tani, Lisette Waits, Linda Laikre
Use of environmental DNA to detect grass carp spawning events Use of environmental DNA to detect grass carp spawning events
The timing and location of spawning events are important data for managers seeking to control invasive grass carp populations. Ichthyoplankton tows for grass carp eggs and larvae can be used to detect spawning events; however, these samples can be highly debris-laden, and are expensive and laborious to process. An alternative method, environmental DNA (eDNA) technology, has proven...
Authors
Cari-Ann Hayer, Michael F. Bayless, Amy E. George, Nathan Thompson, Catherine A. Richter, Duane Chapman
Acute and chronic toxicity of nickel and zinc to a laboratory cultured mayfly (Neocloeon triangulifer) in aqueous but fed exposures Acute and chronic toxicity of nickel and zinc to a laboratory cultured mayfly (Neocloeon triangulifer) in aqueous but fed exposures
Aquatic insects are poorly represented in water quality criteria, and previous studies have suggested a lack of sensitivity in acute toxicity tests despite observational studies demonstrating the contrary. Our objectives were to determine the toxicity of nickel (Ni) and zinc (Zn) to the mayfly Neocloeon triangulifer in fed acute (96-h) and chronic exposures to estimate aqueous effect
Authors
David J. Soucek, Amy Dickinson, Christan E. Schlekat, Eric Van Genderen, Edward J. Hammer
Effects of urbanization on water quality in the Edwards aquifer, San Antonio and Bexar County, Texas Effects of urbanization on water quality in the Edwards aquifer, San Antonio and Bexar County, Texas
Overview Continuous water-quality monitoring data and chemical analysis of surface-water and groundwater samples collected during 2017–19 in the recharge zone of the Edwards aquifer were used to develop a better understanding of the surface-water/groundwater connection in and around Bexar County in south-central Texas. This fact sheet is provided to inform water-resource managers, city...
Authors
Stephen P. Opsahl, MaryLynn Musgrove, Keith E. Mecum
Temporal and spatial variability of water quality in the San Antonio segment of the Edwards aquifer recharge zone, Texas, with an emphasis on periods of groundwater recharge, September 2017–July 2019 Temporal and spatial variability of water quality in the San Antonio segment of the Edwards aquifer recharge zone, Texas, with an emphasis on periods of groundwater recharge, September 2017–July 2019
Ongoing urbanization on the Edwards aquifer recharge zone in the greater San Antonio area raises concern about the potential adverse effects on the public water supply from development. To address this concern, the U.S. Geological Survey, in cooperation with the City of San Antonio, studied patterns of temporal and spatial changes in water quality at selected surface-water and...
Authors
Stephen P. Opsahl, MaryLynn Musgrove, Keith E. Mecum