Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 9969
Influence of salinity on relative density of American crocodiles (Crocodylus acutus) in Everglades National Park: Implications for restoration of Everglades ecosystems
The status of the American crocodile (Crocodylus acutus) has long been a matter of concern in Everglades National Park (ENP) due to its classification as a federal and state listed species, its recognition as a flagship species, and its function as an ecosystem indicator. Survival and recovery of American crocodiles has been linked with regional hydrological conditions, especially freshwater flow
Authors
Frank J. Mazzotti, Brian Smith, Michiko Squires, Michael S. Cherkiss, Seth C Farris, Caitlin Hackett, Kristen M. Hart, Venetia Briggs-Gonzalez, Laura A. Brandt
Adjudicating groundwater: A judge’s guide to understanding groundwater and modeling
Dividing the Waters offers this groundwater science bench book that cannot be matched by any other scientific or judicial publication. Adjudicating Groundwater combines the expertise and experience of academic scientists (UC Davis/Stanford), federal scientists (U.S. Geological Survey), and judicial officers to create a resource that can fulfill the needs of judges tackling the most difficult grou
Authors
Thomas Harter, Tara Moran, Eric Wildman
Microclimate influences mangrove freeze damage: Implications for range expansion in response to changing macroclimate
In response to warming winter air temperatures, freeze-sensitive mangrove forests are expected to expand at the expense of freeze-tolerant salt marshes. To better anticipate and prepare for mangrove range expansion, there is a need to advance understanding of the modulating role of microclimate. Here, we synthesized hypotheses regarding the effects of microclimatic variation on temperature gradien
Authors
Michael J. Osland, Arik M. Hartmann, Richard H. Day, Michael S. Ross, Courtney T. Hall, Laura C. Feher, William Vervaeke
Deep search: Deep sea exploration to advance research on coral/canyon/cold seep habitats
Led by the Bureau of Ocean Energy Management (BOEM), the United States Geological Survey (USGS), and OER is an interagency partnership to explore and characterize sensitive deepwater habitats of the U.S. mid- and south Atlantic deep-sea habitats. Sponsored by the National Oceanographic Partnership Program, the study has brought together scientists from six U.S. academic institutions and five USGS
Authors
Erik E. Cordes, Amanda W.J. Demopoulos, Michael Rasser, Caitlin Adams
Adapting a regional water-quality model for local application: A case study for Tennessee, USA
We evaluated whether SPAtially Referenced Regression On Watershed attributes (SPARROW) models calibrated for two adjacent USA regions could be applied at the local scale to support management decisions for streams in Tennessee. Nutrient-source apportionment of load is important for this local-scale application and demands careful consideration of uncertainty in the calibrated coefficients. We used
Authors
Anne B. Hoos, Sherry H. Wang, Gregory E. Schwarz
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 restorati
Authors
E. R. Hillman, Megan La Peyre
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 18O value
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
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 the use of
Authors
Molly E. Keogh, Alexander S. Kolker, G.A. Snedden, Alisha A. Renfro
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). Seven of the
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
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, with the su
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
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 leptocepha
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
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 life and by
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