Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10483
Annual layers revealed by GPR in the subsurface of a prograding coastal barrier, southwest Washington, U.S.A Annual layers revealed by GPR in the subsurface of a prograding coastal barrier, southwest Washington, U.S.A
The southwest Washington coastline has experienced extremely high rates of progradation during the late Holocene. Subsurface stratigraphy, preserved because of progradation and interpreted using ground-penetrating radar (GPR), has previously been used successfully to document coastal response to prehistoric storm and earthquake events. New GPR data collected at Ocean Shores, Washington...
Authors
L. J. Moore, H.M. Jol, S. Kruse, S. Vanderburgh, G. M. Kaminsky
Degradation of picric acid and 2,6-DNT in marine sediments and waters: The role of microbial activity and ultra-violet exposure Degradation of picric acid and 2,6-DNT in marine sediments and waters: The role of microbial activity and ultra-violet exposure
Bio- and photo-transformation of two munitions and explosives of concern, 2,6-dinitrotoluene (2,6-DNT) and 2,4,6-trinitrophenol (picric acid) were assessed in spiked marine sediments and water. A sandy and a fine-grained sediment, with 0.25% and 1.1% total organic carbon, respectively, were used for biotransformation assessments at 10 and 20 °C. Sterilized sediments were used as controls...
Authors
Marion Nipper, Yaorong Qian, R. Scott Carr, Karen Miller
Historic topographic sheets to satellite imagery—A methodology for evaluating coastal change in Florida's Big Bend tidal marsh Historic topographic sheets to satellite imagery—A methodology for evaluating coastal change in Florida's Big Bend tidal marsh
This open-file report details the methodology used to rectify, digitize, and mosaic nineteen 19th century topographic sheets on the marsh-dominated Big Bend Gulf coast of Florida. Historic charts of tidal marshes in Florida's Big Bend were prepared in a digital grid-based format for comparison with modern features derived from 1995 satellite imagery. The chart-by-chart rectification...
Authors
Ellen A. Raabe, Amy E. Streck, Richard P. Stumpf
Geochemical characterization of shallow ground water in the Eutaw aquifer, Montgomery, Alabama Geochemical characterization of shallow ground water in the Eutaw aquifer, Montgomery, Alabama
Ground water samples were collected from 30 wells located in, or directly down gradient from, recharge areas of the Eutaw aquifer in Montgomery, Alabama. The major ion content of the water evolves from calcium-sodium-chloride- dominated type in the recharge area to calcium-bicarbonate-dominated type in the confined portion of the aquifer. Ground water in the recharge area was...
Authors
J.L. Robinson, C.A. Journey
Novel geophysical and geochemical techniques used to study submarine groundwater discharge in Biscayne Bay, Florida Novel geophysical and geochemical techniques used to study submarine groundwater discharge in Biscayne Bay, Florida
Authors
Peter W. Swarzenski, Bill Burnett, Chris Reich, Henrieta Dulaiova, Richard Peterson, Jeff Meunier
Flow cytometric analysis of crayfish haemocytes activated by lipopolysaccharides Flow cytometric analysis of crayfish haemocytes activated by lipopolysaccharides
Lipopolysaccharides (LPS) from Gram-negative bacteria are strong stimulators of white river crayfish, Procambarus zonangulus, haemocytes in vitro. Following haemocyte treatment with LPS and with LPS from rough mutant R5 (LPS Rc) from Salmonella minnesota, flow cytometric analysis revealed a conspicuous and reproducible decrease in cell size as compared to control haemocytes. These LPS...
Authors
W. Cardenas, J.R. Dankert, J.A. Jenkins
Standing crop and aboveground biomass partitioning of a dwarf mangrove forest in Taylor River Slough, Florida Standing crop and aboveground biomass partitioning of a dwarf mangrove forest in Taylor River Slough, Florida
The structure and standing crop biomass of a dwarf mangrove forest, located in the salinity transition zone ofTaylor River Slough in the Everglades National Park, were studied. Although the four mangrove species reported for Florida occurred at the study site, dwarf Rhizophora mangle trees dominated the forest. The structural characteristics of the mangrove forest were relatively simple...
Authors
C. Coronado-Molina, J.W. Day, E. Reyes, B.C. Perez
Coefficients of productivity for Yellowstone's grizzly bear habitat Coefficients of productivity for Yellowstone's grizzly bear habitat
This report describes methods for calculating coefficients used to depict habitat productivity for grizzly bears in the Yellowstone ecosystem. Calculations based on these coefficients are used in the Yellowstone Grizzly Bear Cumulative Effects Model to map the distribution of habitat productivity and account for the impacts of human facilities. The coefficients of habitat productivity...
Authors
David John Mattson, Kim Barber, Ralene Maw, Roy Renkin
Development of a passive, in situ, integrative sampler for hydrophilic organic contaminants in aquatic environments Development of a passive, in situ, integrative sampler for hydrophilic organic contaminants in aquatic environments
Increasingly it is being realized that a holistic hazard assessment of complex environmental contaminant mixtures requires data on the concentrations of hydrophilic organic contaminants including new generation pesticides, pharmaceuticals, personal care products, and many chemicals associated with household, industrial, and agricultural wastes. To address this issue, we developed a...
Authors
D.A. Alvarez, J. D. Petty, J.N. Huckins, T. L. Jones-Lepp, D.T. Getting, J.P. Goddard, S.E. Manahan
Preparing for climate change: The potential consequences of climate variability and change Preparing for climate change: The potential consequences of climate variability and change
Over the past decades, scientific research has greatly advanced the knowledge and understanding of global environmental change. Research supported by the U. S. Global Change Research Programme (USGCRP) and research and assessment results by international organizations such as the Intergovernmental Panel on Climate Change (IPCC), the World Climate Research Program (WCRP), and the...
Authors
Zhu Ning, R. E. Turner, T.W. Doyle, Kamran Abdollahi, Alma Thornton, Enrique Reyes, D. Justic, E. Swenson, Wael Khairy, Kam-Biu Liu
Comparing groups using structural equations Comparing groups using structural equations
No abstract available.
Authors
James B. Grace