Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10383
Bathymetric mapping, sediment quality, and water quality of Lake Delhi, Iowa, 2001-02 Bathymetric mapping, sediment quality, and water quality of Lake Delhi, Iowa, 2001-02
Lake Delhi was formed in 1929 when the Interstate Power Company dammed the Maquoketa River near Delhi, Iowa, for generation of hydroelectric power. The resulting 450-acre lake became a popular area in eastern Iowa for boating, swimming, and fishing. Hydroelectric power generation ended in 1973, and lakeside residents purchased the dam to maintain the recreational opportunities of the...
Authors
Douglas J. Schnoebelen, Jason C. McVay, Kimberlee K. Barnes, Kent Becher
Interactions of an insecticide, herbicide, and natural stressors in amphibian community mesocosms Interactions of an insecticide, herbicide, and natural stressors in amphibian community mesocosms
Amphibians developing in wetlands embedded within or near agricultural lands may frequently encounter chemical mixtures. The objectives of our study were to determine the effects that post-application concentrations of an insecticide (carbaryl) and an herbicide (atrazine) have on body mass, development, and survival of two anuran species (southern leopard frog, Rana sphenocephala...
Authors
M.D. Boone, S.M. James
Using strip-transect aerial surveys to estimate manatee abundance and population trend in the Ten Thousand Islands Region of southwest Florida Using strip-transect aerial surveys to estimate manatee abundance and population trend in the Ten Thousand Islands Region of southwest Florida
No abstract available.
Authors
Dean E. Easton, Lynn W. Lefebvre, T.J. Doyle
Mass tree mortality leads to mangrove peat collapse at Bay Islands, Honduras after Hurricane Mitch Mass tree mortality leads to mangrove peat collapse at Bay Islands, Honduras after Hurricane Mitch
We measured sediment elevation and accretion dynamics in mangrove forests on the islands of Guanaja and Roatan, Honduras, impacted by Hurricane Mitch in 1998 to determine if collapse of underlying peat was occurring as a result of mass tree mortality. Little is known about the balance between production and decomposition of soil organic matter in the maintenance of sediment elevation of...
Authors
Donald R. Cahoon, P. Hensel, J. Rybczyk, K.L. McKee, C.E. Proffitt, B.C. Perez
Survival, transport, and sources of fecal bacteria in streams and survival in land-applied poultry litter in the upper Shoal Creek basin, southwestern Missouri, 2001–2002 Survival, transport, and sources of fecal bacteria in streams and survival in land-applied poultry litter in the upper Shoal Creek basin, southwestern Missouri, 2001–2002
Densities of fecal coliform bacteria along a 5.7-mi (mile) reach of Shoal Creek extending upstream from State Highway 97 (site 3) to State Highway W (site 2) and in two tributaries along this reach exceeded the Missouri Department of Natural Resources (MDNR) standard of 200 col/100 mL (colonies per 100 milliliters) for whole-body contact recreation. A combination of techniques was used...
Authors
John G. Schumacher
Quality of sediment discharging from the Barton Springs system, Austin, Texas, 2000-2002 Quality of sediment discharging from the Barton Springs system, Austin, Texas, 2000-2002
Four spring outlets of the Barton Springs system provide the only known habitat for the Barton Springs salamander (Eurycea sosorum), a federally listed endangered species. After heavy rainfall, sediment is flushed through the Barton Springs segment of the Edwards aquifer and springflow often becomes turbid (cloudy). Sediment in urban areas often has high concentrations of hydrophobic...
Authors
Barbara Mahler
Heavy metals and metalloids in egg contents and eggshells of passerine birds from Arizona Heavy metals and metalloids in egg contents and eggshells of passerine birds from Arizona
Concentrations of inorganic elements were determined in eggs of passerine birds including the endangered southwestern willow flycatcher (Empidonax traillii extimus) from four regions in Arizona. The main aim of the study was to determine the distribution of metals in egg contents and eggshells, with emphasis on the deposition of Sr in eggshells. Seventy eggs of 11 passerine species were...
Authors
Miguel A. Mora
Turquoise water, silver palms and fluorescent green Leiocephalus Turquoise water, silver palms and fluorescent green Leiocephalus
Abstract not supplied at this time
Authors
C.K. Dodd
A pre-vegetated mat technique for the restoration of submersed aquatic vegetation A pre-vegetated mat technique for the restoration of submersed aquatic vegetation
Communities of submersed aquatic vegetation (SAV) provide critical habitat for wintering waterfowl and many commercially important fish species. Submersed aquatic vegetation also helps minimize storm damage by reducing wave action and stabilizing sediments, and they improve water quality by sequestering nutrients and contaminants (Zieman and Zieman 1989).
Authors
R.G. Boustany
Genotype and elevation influence Spartina alterniflora colonization and growth in a created salt marsh Genotype and elevation influence Spartina alterniflora colonization and growth in a created salt marsh
Colonization, growth, and clonal morphology differ with genotype and are influenced by elevation. Local adaptation of Spartina alterniflora to environmental conditions may lead to dominance by different suites of genotypes in different locations within a marsh. In a constructed marsh, we found reduced colonization in terms of density of clones with increasing distance from edge in a 200...
Authors
C.E. Proffitt, S.E. Travis, K.R. Edwards