Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 9967
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 freshwater mus
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
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 present bec
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
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 guide conse
Authors
Sean M. Hoban, Michael W. Bruford, Josephine D'Urban Jackson, Margarida Lopes-Fernandes, Myriam Heuertz, Paul A. Hohenlohe, Per Sjögren-Gulve, Gernot Segelbacher, Cristiano Vernesi, Sally Aitken, Laura D. Bertola, Paulette Bloomer, Martin Breed, Hernando Rodríguez-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
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 effective in det
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
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 concentration
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
OverviewContinuous 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 planners, th
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
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 groundwater sites in
Authors
Stephen P. Opsahl, MaryLynn Musgrove, Keith E. Mecum
Identifying mangrove-coral habitats in the Florida Keys
Coral reefs are degrading due to many synergistic stressors. Recently there have been a number of global reports of corals occupying mangrove habitats that provide a supportive environment or refugium for corals, sheltering them by reducing stressors such as oxidative light stress and low pH. This study used satellite imagery and manual ground-truthing surveys to search for mangrove-coral habitats
Authors
Christina A. Kellogg, Ryan P. Moyer, Mary Jacobsen, Kimberly K. Yates
Pesticides and their degradates in groundwater reflect past use and current management strategies, Long Island, New York, USA
Long Island, New York, has a mix of urban/suburban to agricultural/horticultural land use and nearly 3 million residents that rely on a sole-source aquifer for drinking water. The analysis of shallow groundwater (<40 m below land surface) collected from 54 monitoring wells across Long Island detected 53 pesticides or pesticide degradates. Maximum concentrations for individual pesticides or pestici
Authors
Irene Fisher, Patrick J. Phillips, Banu Bayraktar, Shirley Chen, Brendan A. McCarthy, Mark W. Sandstrom
Status of the major aquaculture carps of China in the Laurentian Great Lakes Basin
There is concern of economic and environmental damage occuring if any of the four major aquacultured carp species of China, black carp Mylopharyngodon piceus, bighead carp Hypophthalmichthys nobilis, silver carp H. molitrix, or grass carp Ctenopharyngodon idella, were to establish in the Laurentian Great Lakes. All four are reproducing in the Mississippi River Basin. We review the status of these
Authors
Duane Chapman, Amy J. Benson, Holly S. Embke, Nicole R. King, Patrick Kočovský, Teresa D. Lewis, Nicholas E. Mandrak
Mangrove blue carbon in the face of deforestation, climate change, and restoration
Coastal wetlands have disproportionately high carbon densities, known as blue carbon, compared to most terrestrial ecosystems. Mangroves and their blue carbon stocks are at risk globally from land‐use and land‐cover change (LULCC) activities such as aquaculture, alongside biophysical disturbances such as sea‐level rise and cyclones. Global estimates of carbon emissions from mangrove loss have been
Authors
Daniel A. Friess, Ken Krauss, Pierre Taillardat, Maria Fernanda Adame, Erik S. Yando, Clint Cameron, Sigit D. Sasmito, Meriadec Sillanpaa
Cliff Feature Delineation Tool and Baseline Builder version 1.0 user guide
Coastal cliffs constitute 80 percent of the world’s coastline, with seacliffs fronting a large proportion of the U.S. West Coast shoreline, particularly in California. Erosion of coastal cliffs can threaten infrastructure and human life, yet the spatial and temporal scope of cliff studies have been limited by cumbersome traditional methods that rely on the manual interpretation of seacliff feature
Authors
Alexander C. Seymour, Cheryl J. Hapke, Jonathan Warrick