Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10363
Hydrologic control of litter decomposition in seasonally flooded prairie marshes Hydrologic control of litter decomposition in seasonally flooded prairie marshes
The effect of seasonal inundation on the decomposition of emergent macrophyte litter (Scolochloa festucacea) was examined under experimental flooding regimes in a northern prairie marsh. Stem and leaf litter was subjected to six aboveground inundation treatments (ranging from never flooded to flooded April through October) and two belowground treatments (nonflooded and flooded April to...
Authors
Hilary A. Neckles, Christopher Neill
Community‐level field method for testing the toxicity of contaminated sediments in estuaries Community‐level field method for testing the toxicity of contaminated sediments in estuaries
The objective of this study was to demonstrate a method for testing the toxicity of contaminated sediments under field conditions. An artificial sediment that matches field sediment in grain‐size distribution and organic matter content was mixed from 11 components and used as the test substrate. Clean sediments and sediments spiked with zinc (∼8,000 mg/kg) were exposed in the field on a...
Authors
Mary C. Watzin, Pasquale F. Roscigno, W. David Burke
Timing of remigial molt in fulvous whistling ducks nesting in Louisiana Timing of remigial molt in fulvous whistling ducks nesting in Louisiana
No abstract available.
Authors
William L. Hohman, David M. Richard
Distribution and status of submerged vegetation in estuaries of the upper Texas coast Distribution and status of submerged vegetation in estuaries of the upper Texas coast
Composition and biomass of beds of submerged aquatic vegetation (SAV) in estuaries along the upper Texas coast were examined from bottom core and rake samples taken along 72 line transects during July–August 1987. Substrate composition, salinity, water depth, and water clarity were also measured at each sample station. Halodule wrightii was the dominant species of SAV meadows (69%...
Authors
S.E. Adair, J.L. Moore, Christopher P. Onuf
Aquatic invertebrate production in southeastern USA wetlands during winter and spring Aquatic invertebrate production in southeastern USA wetlands during winter and spring
We measured aquatic invertebrate abundance, standing stock biomass, and community production in three types of wetlands on Noxubee National Wildlife Refuge from December 1987 through April 1988. Together, Orthocyclops modestus and Daphnia pulex were the most abundant organisms collected in all habitats during both winter and spring, but each contributed little to total standing stock...
Authors
Walter G. Duffy, Douglas LaBar
Comparison of flank margin cave development on San Salvador island, Bahamas, and Isla de Mona, Puerto Rico Comparison of flank margin cave development on San Salvador island, Bahamas, and Isla de Mona, Puerto Rico
San Salvador Island, Bahamas is a 161 Km2 tectonically stable late Quaternary carbonate island located 600 km east-southeast of Miami FL. San Salvador contains numerous flank margin caves (phreatic karst features) that developed primarily in late Pleistocene eolianites. These caves developed during a short time in versy small fresh-water lenses. Cave elevations and Uranium-series ages...
Authors
J. Mylroie, J.L. Carew, E.F. Frank, Matthew C. Larsen
MAPS is for the birds MAPS is for the birds
No abstract available
Authors
David L. Watts, Daniel J. Twedt, Allan J. Mueller
Ground water and the floods of 1993 Ground water and the floods of 1993
No abstract available.
Authors
R.C. Buchmiller
Effects of weather and tides on feeding and flock positions of wintering redheads in the Chandeleur Sound, Louisiana Effects of weather and tides on feeding and flock positions of wintering redheads in the Chandeleur Sound, Louisiana
We studied the effects of weather and tides on percent feeding and flock positions of wintering redheads (Aythya americana Eyton) in the Chandeleur Sound, Louisiana, USA. Flock scans (n = 750) were made on 55 flocks from November through March of 1988–1989. The percent of the flock that was feeding was negatively correlated with time of day, temperature, water level, and distance of the...
Authors
Thomas C. Michot, E. Barry Moser, Wayne Norling
Mangroves, hurricanes, and lightning strikes: Assessment of Hurricane Andrew suggests an interaction across two differing scales of disturbance Mangroves, hurricanes, and lightning strikes: Assessment of Hurricane Andrew suggests an interaction across two differing scales of disturbance
The track of Hurricane Andrew carried it across one of the most extensive mangrove for ests in the New World. Although it is well known that hurricanes affect mangrove forests, surprisingly little quantitative information exists concerning hurricane impact on forest structure, succession, species composition, and dynamics of mangrove-dependent fauna or on rates of eco-system recovery...
Authors
Thomas J. Smith, Michael B. Robblee, Harold R. Wanless, Thomas W. Doyle
Hurricane impacts on uplands and freshwater swamp forest: Large trees and epiphytes sustained the greatest damage during Hurricane Andrew Hurricane impacts on uplands and freshwater swamp forest: Large trees and epiphytes sustained the greatest damage during Hurricane Andrew
No abstract available.
Authors
Lloyd Loope, Michael Duever, Alan Herndon, James Snyder, Deborah Jansen
Deformities in birds of the Great Lakes region. Assigning causality Deformities in birds of the Great Lakes region. Assigning causality
No abstract available.
Authors
John P. Giesy, James P. Ludwig, Donald E. Tillitt