Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10386
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
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
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
Nutrient concentrations, loads, and yields in the Eucha-Spavinaw Basin, Arkansas and Oklahoma, 2002-2006 Nutrient concentrations, loads, and yields in the Eucha-Spavinaw Basin, Arkansas and Oklahoma, 2002-2006
The City of Tulsa, Oklahoma, uses Lake Eucha and Spavinaw Lake in the Eucha-Spavinaw basin in northwestern Arkansas and northeastern Oklahoma for public water supply. Taste and odor problems in the water attributable to blue-green algae have increased in frequency. Changes in the algae community in the lakes may be attributable to increases in nutrient levels in the lakes, and in the...
Authors
Robert L. Tortorelli
Emergence of functional responses from interactions of individuals Emergence of functional responses from interactions of individuals
No abstract available.
Authors
Donald L. DeAngelis, Shu Ju, J. Nathaniel Holland
Fire and nonnative invasive plants in the central bioregion Fire and nonnative invasive plants in the central bioregion
The Central bioregion is a vast area, stretching from Canada to Mexico and from the eastern forests to the Rocky Mountains, dominated by grasslands and shrublands, but inclusive of riparian and other forests. This bioregion has been impacted by many human induced changes, particularly relating to agricultural practices, over the past 150 years. Also changed are fire regimes, first by...
Authors
James B. Grace, Kristin Zouhar
Historical changes in the Mississippi-Alabama barrier-island chain and the roles of extreme storms, sea level, and human activities Historical changes in the Mississippi-Alabama barrier-island chain and the roles of extreme storms, sea level, and human activities
Barrier-island chains worldwide are undergoing substantial changes, and their futures remain uncertain. An historical analysis of a barrier-island chain in the north-central Gulf of Mexico shows that the Mississippi barriers are undergoing rapid systematic land loss and translocation associated with: (1) unequal lateral transfer of sand related to greater updrift erosion compared to...
Authors
Robert A Morton
A Key to the Pupal Exuviae of the Midges (Diptera: Chironomidae) of Everglades National Park, Florida A Key to the Pupal Exuviae of the Midges (Diptera: Chironomidae) of Everglades National Park, Florida
A key has been developed for identifying the pupal exuviae of 132 taxa of chironomid midges collected in Everglades National Park, as well as 18 additional species from freshwater habitats adjacent to the Park. Descriptions and illustrations are based upon voucher specimens from extensive collections of chironomid pupal exuviae for faunal surveys and biomonitoring research conducted in...
Authors
Robert E. Jacobsen
Effect of hydrological conditions on nitrous oxide, methane, and carbon dioxide dynamics in a bottomland hardwood forest and its implication for soil carbon sequestration Effect of hydrological conditions on nitrous oxide, methane, and carbon dioxide dynamics in a bottomland hardwood forest and its implication for soil carbon sequestration
This study was conducted at three locations in a bottomland hardwood forest with a distinct elevation and hydrological gradient: ridge (high, dry), transition, and swamp (low, wet). At each location, concentrations of soil greenhouse gases (N2O, CH4, and CO2), their fluxes to the atmosphere, and soil redox potential (Eh) were measured bimonthly, while the water table was monitored every...
Authors
K. Yu, S.P. Faulkner, M.J. Baldwin