Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10362
Escherichia coli bacteria density in relation to turbidity, streamflow characteristics, and season in the Chattahoochee River near Atlanta, Georgia, October 2000 through September 2008—Description, statistical analysis, and predictive modelin Escherichia coli bacteria density in relation to turbidity, streamflow characteristics, and season in the Chattahoochee River near Atlanta, Georgia, October 2000 through September 2008—Description, statistical analysis, and predictive modelin
Water-based recreation—such as rafting, canoeing, and fishing—is popular among visitors to the Chattahoochee River National Recreation Area (CRNRA) in north Georgia. The CRNRA is a 48-mile reach of the Chattahoochee River upstream from Atlanta, Georgia, managed by the National Park Service (NPS). Historically, high densities of fecal-indicator bacteria have been documented in the...
Authors
Stephen J. Lawrence
Geochemical and hydrologic data for San Marcos Springs recharge characterization near San Marcos, Texas, November 2008--December 2010 Geochemical and hydrologic data for San Marcos Springs recharge characterization near San Marcos, Texas, November 2008--December 2010
During 2008–10, the U.S. Geological Survey, in cooperation with the San Antonio Water System, collected geochemical and hydrologic data in Bexar, Comal, and Hays Counties, Texas, to define and characterize the sources of recharge to San Marcos Springs. Precipitation samples were collected for stable isotope analysis at 1 site and water-quality samples were collected at 7 springs, 21...
Authors
Cassi L. Crow
Water quality and the composition of fish and macroinvertebrate communities in the Devils and Pecos Rivers within and upstream from the Amistad National Recreation Area, Texas, 2005-7 Water quality and the composition of fish and macroinvertebrate communities in the Devils and Pecos Rivers within and upstream from the Amistad National Recreation Area, Texas, 2005-7
To gain a better understanding of the water quality and status of fish and macroinvertebrate communities, the U.S. Geological Survey, in cooperation with the National Park Service and Amistad National Recreation Area, completed a reconnaissance-level survey of the water quality and fish and macroinvertebrate communities in the Devils and Pecos Rivers in and upstream from the Amistad...
Authors
J. Bruce Moring
Linking urbanization to the Biological Condition Gradient (BCG) for stream ecosystems in the Northeastern United States using a Bayesian network approach Linking urbanization to the Biological Condition Gradient (BCG) for stream ecosystems in the Northeastern United States using a Bayesian network approach
Urban development alters important physical, chemical, and biological processes that define urban stream ecosystems. An approach was developed for quantifying the effects of these processes on aquatic biota, and then linking those effects to endpoints that can be used for environmental management. These complex, interacting systems are challenging to model from a scientific standpoint. A...
Authors
Roxolana Kashuba, Gerard McMahon, Thomas F. Cuffney, Song Qian, Kenneth Reckhow, Jeroen Gerritsen, Susan Davies
Response to comments on "Productivity is a poor predictor of plant species richness" Response to comments on "Productivity is a poor predictor of plant species richness"
Pan et al. claim that our results actually support a strong linear positive relationship between productivity and richness, whereas Fridley et al. contend that the data support a strong humped relationship. These responses illustrate how preoccupation with bivariate patterns distracts from a deeper understanding of the multivariate mechanisms that control these important ecosystem...
Authors
James B. Grace, Peter B. Adler, Eric W. Seabloom, Elizabeth T. Borer, Helmut Hillebrand, Yann Hautier, Andy Hector, W. Stanley Harpole, Lydia R. O’Halloran, T. Michael Anderson, Jonathan D. Bakker, Cynthia S. Brown, Yvonne M. Buckley, Scott L. Collins, Kathryn L. Cottingham, Michael J. Crawley, Ellen Ingman Damschen, Kendi F. Davies, Nicole M. DeCrappeo, Philip A. Fay, Jennifer Firn, Daniel S. Gruner, Nicole Hagenah, Virginia L. Jin, Kevin P. Kirkman, Johannes M.H. Knops, Kimberly J. La Pierre, John G. Lambrinos, Brett A. Melbourne, Charles E. Mitchell, Joslin L. Moore, John W. Morgan, John L. Orrock, Suzanne M. Prover, Carly J. Stevens, Peter D. Wragg, Louie H. Yang
Estimating shorebird populations during spring stopover in rice fields of the Louisiana and Texas Gulf Coastal Plain Estimating shorebird populations during spring stopover in rice fields of the Louisiana and Texas Gulf Coastal Plain
Migrating shorebird populations using approximately 2% of Louisiana and Texas Gulf Coastal rice fields were surveyed during spring migration (March–May of 1997 and 1998) using biweekly stratified random surveys conducted at 50 roadside survey points and approximately 30,000 shorebirds were observed. Shorebird counts were extrapolated and almost 1.4 million birds in 1997 and over 1.6...
Authors
Wayne Norling, Clinton W. Jeske, Tyler F. Thigpen, Paul C. Chadwick
Myocastor coypus Molina (coypu) Myocastor coypus Molina (coypu)
Myocastor coypus (coypu) (Figure 30.1) is a large semi-aquatic rodent native to South America that is now present in all continents, except Oceania and Antarctica, after widespread introductions in the 1930-1940s. There is a division in English speaking countries as to common name usage. In England and former British colonies (i.e. Kenya) they are called "coypus". In North America and...
Authors
Sandro Bertolino, Laura M Guichon, Jacoby Carter
Simulation of streamflow and the effects of brush management on water yields in the upper Guadalupe River watershed, south-central Texas, 1995-2010 Simulation of streamflow and the effects of brush management on water yields in the upper Guadalupe River watershed, south-central Texas, 1995-2010
The U.S. Geological Survey, in cooperation with the Texas State Soil and Water Conservation Board and the Upper Guadalupe River Authority, developed and calibrated a Soil and Water Assessment Tool watershed model of the upper Guadalupe River watershed in south-central Texas to simulate streamflow and the effects of brush management on water yields in the watershed and to Canyon Lake for...
Authors
Johnathan R. Bumgarner, Florence E. Thompson
Hydrologic, vegetation, and soil data collected in selected wetlands of the Big River Management area, Rhode Island, from 2008 through 2010 Hydrologic, vegetation, and soil data collected in selected wetlands of the Big River Management area, Rhode Island, from 2008 through 2010
The Rhode Island Water Resources Board planned to develop public water-supply wells in the Big River Management Area in Kent County, Rhode Island. Research in the United States and abroad indicates that groundwater withdrawal has the potential to affect wetland hydrology and related processes. In May 2008, the Rhode Island Water Resources Board, the U.S. Geological Survey, and the...
Authors
Meredith S. Borenstein, Francis C. Golet, David S. Armstrong, Robert F. Breault, Timothy D. McCobb, Peter K. Weiskel
Modification of selected South Carolina bridge-scour envelope curves Modification of selected South Carolina bridge-scour envelope curves
Historic scour was investigated at 231 bridges in the Piedmont and Coastal Plain physiographic provinces of South Carolina by the U.S. Geological Survey in cooperation with the South Carolina Department of Transportation. These investigations led to the development of field-derived envelope curves that provided supplementary tools to assess the potential for scour at bridges in South...
Authors
Stephen T. Benedict, Andral W. Caldwell
Flooded area and plant zonation in isolated wetlands in well fields in the Northern Tampa Bay Region, Florida, following reductions in groundwater-withdrawal rates Flooded area and plant zonation in isolated wetlands in well fields in the Northern Tampa Bay Region, Florida, following reductions in groundwater-withdrawal rates
The extent and duration of the flooded area were compared in two reference wetlands and nine wetlands in well fields in the northern Tampa Bay region, Florida, to determine whether reductions in well-field groundwater-withdrawal rates resulted in increases in wetland flooded area. Flooded area, expressed as a percentage of the total wetland area, was used to provide a quantitative and...
Authors
Kim H. Haag, William R. Pfeiffer
Optimum swimming pathways of fish spawning migrations in rivers Optimum swimming pathways of fish spawning migrations in rivers
Fishes that swim upstream in rivers to spawn must navigate complex fluvial velocity fields to arrive at their ultimate locations. One hypothesis with substantial implications is that fish traverse pathways that minimize their energy expenditure during migration. Here we present the methodological and theoretical developments necessary to test this and similar hypotheses. First, a cost...
Authors
Brandon McElroy, Aaron DeLonay, Robert Jacobson