Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10483
Estimated Water Use in Puerto Rico, 2005 Estimated Water Use in Puerto Rico, 2005
Water-use data were compiled for the 78 municipios of the Commonwealth of Puerto Rico for 2005. Five offstream categories were considered: public-supply water withdrawals and deliveries, domestic self-supplied water use, industrial self-supplied ground-water withdrawals, crop irrigation water use, and thermoelectric power freshwater use. One water-use category also was considered: power...
Authors
Wanda L. Molina-Rivera, Fernando Gómez-Gómez
Potential for 4-n-nonylphenol biodegradation in stream sediments Potential for 4-n-nonylphenol biodegradation in stream sediments
The potential for in situ biodegradation of 4-nonylphenol (4-NP) was investigated in three hydrologically distinct streams impacted by wastewater treatment plants (WWTPs) in the United States. Microcosms were prepared with sediments from each site and amended with [U-ring-14C]4-n-nonylphenol (4-n-NP) as a model test substrate. Microcosms prepared with sediment collected upstream of the...
Authors
P. M. Bradley, L. B. Barber, D.W. Kolpin, P.B. McMahon, F. H. Chapelle
Cross-kingdom amplification using Bacteria-specific primers: Complications for studies of coral microbial ecology Cross-kingdom amplification using Bacteria-specific primers: Complications for studies of coral microbial ecology
PCR amplification of pure bacterial DNA is vital to the study of bacterial interactions with corals. Commonly used Bacteria-specific primers 8F and 27F paired with the universal primer 1492R amplify both eukaryotic and prokaryotic rRNA genes. An alternative primer set, 63F/1542R, is suggested to resolve this problem.
Authors
Julia P. Galkiewicz, Christina A. Kellogg
Where temperate meets tropical: Multi-factorial effects of elevated CO2, nitrogen enrichment, and competition on a mangrove-salt marsh community Where temperate meets tropical: Multi-factorial effects of elevated CO2, nitrogen enrichment, and competition on a mangrove-salt marsh community
Our understanding of how elevated CO2 and interactions with other factors will affect coastal plant communities is limited. Such information is particularly needed for transitional communities where major vegetation types converge. Tropical mangroves (Avicennia germinans) intergrade with temperate salt marshes (Spartina alterniflora) in the northern Gulf of Mexico, and this transitional...
Authors
K.L. McKee, J.E. Rooth
Ecology of coral reefs in the US Virgin Islands Ecology of coral reefs in the US Virgin Islands
The US Virgin Islands (USVI ) in the northeastern Caribbean, consist of St. Croix (207 km2), St. Thomas (83 km2), St. John (52 km2) and numerous smaller islands (Dammann and Nellis 1992). They are part of the Lesser Antilles and Leeward Islands on the eastern boundary of the Caribbean plate (Fig. 8.1). An extensive platform underlies St. Thomas and St. John and connects these islands to...
Authors
Caroline S. Rogers, Jeff Miller, Erinn Muller, Peter J Edmunds, Richard S. Nemeth, James P. Beets, Alan M. Friedlander, Tyler B. Smith, Rafe Boulon, Christopher F.G. Jeffrey, Charles Menza, Chris Caldow, Nasseer Idrisi, Barbara Kojis, Mark E. Monaco, Anthony S. Spitzack, Elizabeth H. Gladfelter, John C. Ogden, Zandy M Hillis-Star, Ian Lundgren, William B. Schill, Ilsa B. Kuffner, Laurie L. Richardson, Barry E. Devine, Joshua D. Voss
Estimation of groundwater and nutrient fluxes to the Neuse River estuary, North Carolina Estimation of groundwater and nutrient fluxes to the Neuse River estuary, North Carolina
A study was conducted between April 2004 and September 2005 to estimate groundwater and nutrient discharge to the Neuse River estuary in North Carolina. The largest groundwater fluxes were observed to occur generally within 20 m of the shoreline. Groundwater flux estimates based on seepage meter measurements ranged from 2.86??108 to 4.33??108 m3 annually and are comparable to estimates...
Authors
T.B. Spruill, J.F. Bratton
Biological communities and geomorphology of patch reefs in Biscayne National Park, Florida, U.S.A. Biological communities and geomorphology of patch reefs in Biscayne National Park, Florida, U.S.A.
Coral reef ecosystem management benefits from continual, quantitative assessment of the resources being managed, plus assessment of factors that affect distribution patterns of organisms in the ecosystem. In this study, we investigated the relationships among physical, benthic, and fish variables in effort to help explain the distribution patterns of ecologically and economically...
Authors
Ilsa B. Kuffner, John Brock, Rikki Grober-Dunsmore, T. Don Hickey, Victor Bonito, Jeremy E. Bracone, C. Wayne Wright
Statistical analysis of major ion and trace element geochemistry of water, 1986-2006, at seven wells transecting the freshwater/saline-water interface of the Edwards aquifer, San Antonio, Texas Statistical analysis of major ion and trace element geochemistry of water, 1986-2006, at seven wells transecting the freshwater/saline-water interface of the Edwards aquifer, San Antonio, Texas
This report by the U.S. Geological Survey, in cooperation with the San Antonio Water System, describes the results of a statistical analysis of major ion and trace element geochemistry of water at seven wells transecting the freshwater/saline-water interface of the Edwards aquifer in San Antonio, Texas, either over time or in response to variations in hydrologic conditions. The data used...
Authors
Barbara Mahler
A low intensity sampling method for assessing blue crab abundance at Aransas National Wildlife Refuge and preliminary results on the relationship of blue crab abundance to whooping crane winter mortality A low intensity sampling method for assessing blue crab abundance at Aransas National Wildlife Refuge and preliminary results on the relationship of blue crab abundance to whooping crane winter mortality
We sampled blue crabs (Callinectes sapidus) in marshes on the Aransas National Wildlife Refuge, Texas from 1997 to 2005 to determine whether whooping crane (Grus americana) mortality was related to the availability of this food source. For four years, 1997 - 2001, we sampled monthly from the fall through the spring. From these data, we developed a reduced sampling effort method that...
Authors
Bruce H. Pugesek, Michael J. Baldwin, Thomas Stehn
A national reconnaissance of pharmaceuticals and other organic wastewater contaminants in the United States - I) Groundwater A national reconnaissance of pharmaceuticals and other organic wastewater contaminants in the United States - I) Groundwater
As part of the continuing effort to collect baseline information on the environmental occurrence of pharmaceuticals, and other organic wastewater contaminants (OWCs) in the Nation's water resources, water samples were collected from a network of 47 groundwater sites across 18 states in 2000. All samples collected were analyzed for 65 OWCs representing a wide variety of uses and origins...
Authors
K.K. Barnes, D.W. Kolpin, E. T. Furlong, S.D. Zaugg, M. T. Meyer, L. B. Barber
Ground-Water Flow, 2004-07, and Water Quality, 1992-2007, in McBaine Bottoms, Columbia, Missouri Ground-Water Flow, 2004-07, and Water Quality, 1992-2007, in McBaine Bottoms, Columbia, Missouri
The U.S. Geological Survey, in cooperation with the city of Columbia, Missouri, and the Missouri Department of Conservation, collected ground-water quality data, surface-water quality data, and water-level data in McBaine Bottoms, southwest of Columbia. McBaine Bottoms, adjacent to the Missouri River, is the location of the municipal-supply well field for the city of Columbia, the city...
Authors
Brenda Joyce Smith, Joseph M. Richards
Use of inverse-modeling methods to improve ground-water-model calibration and evaluate model-prediction uncertainty, Camp Edwards, Cape Cod, Massachusetts Use of inverse-modeling methods to improve ground-water-model calibration and evaluate model-prediction uncertainty, Camp Edwards, Cape Cod, Massachusetts
Historical weapons testing and disposal activities at Camp Edwards, which is located on the Massachusetts Military Reservation, western Cape Cod, have resulted in the release of contaminants into an underlying sand and gravel aquifer that is the sole source of potable water to surrounding communities. Ground-water models have been used at the site to simulate advective transport in the...
Authors
Donald A. Walter, Denis R. LeBlanc