Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10379
Effects of salinity and light on growth and interspecific interactions between Myriophyllum spicatum L. and Ruppia maritima L. Effects of salinity and light on growth and interspecific interactions between Myriophyllum spicatum L. and Ruppia maritima L.
Submerged macrophyte habitats provide significant benefits to estuarine systems. In southeast Louisiana, Myriophyllum spicatum L. (milfoil) and Ruppia maritima L. (widgeongrass) are dominant species existing across fresh to brackish areas. Though frequently co-occurring across the range of salinity and light conditions, their individual responses to changing environmental conditions from
Authors
E. R. Hillman, Megan La Peyre
Modeling δ18O as an early indicator of regime shift arising from salinity stress in coastal vegetation Modeling δ18O as an early indicator of regime shift arising from salinity stress in coastal vegetation
In many important coastal habitats, a combination of increasing soil salinization due to sea level rise, reduced precipitation and storm surges may induce regime shift from salinity-intolerant glycophytic vegetation to salinity-tolerant halophytic species. Early detection of regime shift due to salinity stress in vegetation may facilitate conservation efforts. It has been shown that the...
Authors
Su Yean Teh, Hock Lye Koh, Donald L. DeAngelis, Clifford I. Voss, Leonel da Silveira Lobo Sternberg
Hydrodynamic controls on sediment retention in an emerging diversion-fed delta Hydrodynamic controls on sediment retention in an emerging diversion-fed delta
The morphodynamics of river-dominated deltas are largely controlled by the supply and retention of sediment within deltaic wetlands and the rate of relative sea-level rise. Yet, sediment budgets for deltas are often poorly constrained. In the Mississippi River Delta, a system rapidly losing land due to natural and anthropogenic causes, restoration efforts seek to build new land through...
Authors
Molly E. Keogh, Alexander S. Kolker, Gregg A. Snedden, Alisha A. Renfro
Per- and polyfluoroalkyl substances (PFAS) in plasma of the West Indian manatee (Trichechus manatus) Per- and polyfluoroalkyl substances (PFAS) in plasma of the West Indian manatee (Trichechus manatus)
Per- and polyfluoroalkyl substances (PFAS) are ubiquitous, synthetic anthropogenic chemicals known to infiltrate and persist in biological systems as a result of their stability and bioaccumulation potential. This study investigated 15 PFAS, including short-chain carboxylic and sulfonic acids, and their presence in a threatened herbivore, the West Indian manatee (Trichechus manatus)...
Authors
Kady Palmer, Jacqueline T. Bangma, Jessica L. Reiner, Robert K. Bonde, Jeffrey E. Korte, Ashley S. P. Boggs, John A. Bowden
Potential for increased inundation in flood-prone regions of southeast Florida in response to climate and sea-level changes in Broward County, Florida, 2060–69 Potential for increased inundation in flood-prone regions of southeast Florida in response to climate and sea-level changes in Broward County, Florida, 2060–69
The U.S. Geological Survey, in cooperation with Broward County Environmental Planning and Resilience Division, has developed county-scale and local-scale groundwater/surface-water models to study the potential for increased inundation and flooding in eastern Broward County that are due to changes in future climate and sea-level rise. These models were constructed by using MODFLOW 2005...
Authors
Jeremy D. Decker, Joseph D. Hughes, Eric D. Swain
Assemblage structure, vertical distributions and stable‐isotope compositions of anguilliform leptocephali in the Gulf of Mexico Assemblage structure, vertical distributions and stable‐isotope compositions of anguilliform leptocephali in the Gulf of Mexico
In August 2007, October 2008 and September–October 2010, 241 Tucker trawl and plankton net tows were conducted at the surface to depths of 1377 m at six locations in the northern and eastern Gulf of Mexico (GOM) to document leptocephalus diversity and determine how assemblage structure, larval size, abundance and isotopic signatures differ across the region and with depth. Overall, 2696
Authors
Andrea M. Quattrini, Jennifer McClain Counts, Stephen J. Artabane, Adela Roa-Varon, Tara C. McIver, Michael Rhode, Steve W. Ross
Design and methods of the U.S. Geological Survey Northeast Stream Quality Assessment (NESQA), 2016 Design and methods of the U.S. Geological Survey Northeast Stream Quality Assessment (NESQA), 2016
During 2016, as part of the National Water-Quality Assessment Project (NAWQA), the U.S. Geological Survey conducted the Northeast Stream Quality Assessment (NESQA) to investigate stream quality in the northeastern United States. The goal of the NESQA was to assess the health of wadeable streams in the region by characterizing multiple water-quality factors that are stressors to aquatic...
Authors
James F. Coles, Karen Riva-Murray, Peter C. Van Metre, Daniel T. Button, Amanda H. Bell, Sharon L. Qi, Celeste A. Journey, Rich W. Sheibley
Factors affecting the occurrence of lead and manganese in untreated drinking water from Atlantic and Gulf Coastal Plain aquifers, eastern United States—Dissolved oxygen and pH framework for evaluating risk of elevated concentrations Factors affecting the occurrence of lead and manganese in untreated drinking water from Atlantic and Gulf Coastal Plain aquifers, eastern United States—Dissolved oxygen and pH framework for evaluating risk of elevated concentrations
Groundwater samples collected during 2012 and 2013 from public-supply wells screened in the Atlantic and Gulf Coastal Plain aquifers of the eastern and southeastern U.S. rarely contained lead or manganese concentrations that exceeded drinking-water limits, despite having corrosive characteristics. Data indicate that the occurrence of dissolved lead and manganese in sampled groundwater...
Authors
Craig J. Brown, Jeannie R. B. Barlow, Charles A. Cravotta, Bruce D. Lindsey
Research priorities for freshwater mussel conservation assessment Research priorities for freshwater mussel conservation assessment
Freshwater mussels are declining globally, and effective conservation requires prioritizing research and actions to identify and mitigate threats impacting mussel species. Conservation priorities vary widely, ranging from preventing imminent extinction to maintaining abundant populations. Here, we develop a portfolio of priority research topics for freshwater mussel conservation...
Authors
Noe Ferreira-Rodriguez, Yoshihiro B. Akiyama, Olga V. Aksenova, M. Christopher Barnhart, Yulia V. Bespalaya, Arthur E. Bogan, Ivan N Bolotov, Prem B. Budha, Cristhian Clavijo, Susan J. Clearwater, Gustavo Darrigran, Van Tu Do, Karel Douda, Elsa Froufe, Clemens Gumpinger, Lennart Henrikson, Chris L. Humphrey, Nathan A. Johnson, Olga Klishko, Michael W. Klunzinger, Satit Kovitvadhi, Uthaiwan Kovitvadhi, Jasna Lajtner, Manuel Lopes-Lima, Evelyn A. Moorkens, Shigeya Nagayama, Karl-Otto Nagel, Mitsunori Nakano, Junjiro N. Negishi, Paz Ondina, Panu Oulasvirta, Vincent Prie, Nicoletta Riccardi, Mudite Rudzite, Fran Sheldon, Ronaldo Sousa, David L. Strayer, Motoi Takeuchi, Jouni Taskinen, Amilcar Teixeira, Jeremy S. Tiemann, Maria Urbanska, Simone Varandas, Maxim V. Vinarski, Barry J. Wicklow, Tadeusz Zajac, Caryn C. Vaughn
Considerations for Globigerinoides ruber (white and pink) paleoceanography: Comprehensive insights from a long‐running sediment trap Considerations for Globigerinoides ruber (white and pink) paleoceanography: Comprehensive insights from a long‐running sediment trap
We present a detailed analysis of the seasonal distribution, size, morphological variability and geochemistry of co‐occurring pink and white chromotypes of Globigerinoides ruberfrom a high‐resolution (1–2 weeks) and long‐running sediment trap time series in the northern Gulf of Mexico. We find no difference in the seasonal flux of the two chromotypes. Although flux of G. ruber is...
Authors
Julie N. Richey, Kaustubh Thirumalai, Deborah Khider, Caitlin E. Reynolds, Judson W. Partin, Terrence M. Quinn
Assessment of bird exposure to lead at Tyndall and Beale Air Force Bases, 2016–17 Assessment of bird exposure to lead at Tyndall and Beale Air Force Bases, 2016–17
Soil contamination by lead (Pb) from past small munitions training on Beale Air Force Base, California, and Tyndall Air Force Base, Florida, may result in adverse effects for passerine birds that utilize the locations. A study was conducted during 2016-17 by the U.S. Geological Survey, in cooperation with the U.S. Fish and Wildlife Service and U.S. Air Force, at both Air Force Bases...
Authors
Timothy A. Bargar
Diatom assemblage changes in agricultural alluvial plain streams and application for nutrient management Diatom assemblage changes in agricultural alluvial plain streams and application for nutrient management
In large, alluvial floodplains dominated by agriculture, small streams have the potential to experience nutrient enrichment affecting algal assemblage structure and metabolism. Nutrient enrichment is largely driven by application of nutrients and altered hydrologic regimes. To inform stressor–response-based nutrient reduction goals for agricultural alluvial plain streams, diatom...
Authors
Matthew B. Hicks, Jason M. Taylor