Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10362
An investigation of the interrelation of Florida Bay dynamics to ecosystem processes in South Florida An investigation of the interrelation of Florida Bay dynamics to ecosystem processes in South Florida
No abstract available.
Authors
R.W. Schaffranek, T. J. Smith, C. W. Holmes
Effects of land use on water quality and transport of selected constituents in streams in Mecklenburg County, North Carolina, 1994–98 Effects of land use on water quality and transport of selected constituents in streams in Mecklenburg County, North Carolina, 1994–98
Transport rates for total solids, total nitrogen, total phosphorus, biochemical oxygen demand, chromium, copper, lead, nickel, and zinc during 1994–98 were computed for six stormwater-monitoring sites in Mecklenburg County, North Carolina. These six stormwater-monitoring sites were operated by the Mecklenburg County Department of Environmental Protection, in cooperation with the City of...
Authors
Gloria M. Ferrell
Water-quality, biology, and streambed sediment data and preliminary geochemical interpretations for streams in the upper Prickly Pear Creek watershed, Montana, 2000 Water-quality, biology, and streambed sediment data and preliminary geochemical interpretations for streams in the upper Prickly Pear Creek watershed, Montana, 2000
No abstract available.
Authors
Terry L. Klein, Joanna N. Thamke, Aida M. Farag
Ecological scale and its implications for freshwater fishes in the Florida Everglades Ecological scale and its implications for freshwater fishes in the Florida Everglades
No abstract available.
Authors
J.C. Trexler, W.F. Loftus, F. Jordan, J.H. Chick, K. L. Kandl, T. C. McElroy, O. L. Bass
Manatees in the Gulf of Mexico Manatees in the Gulf of Mexico
The endangered Florida manatee (Trichechus manatus latirostris) inhabits rivers and estuaries along both coasts of Florida and, to a lesser extent, adjacent states (Figure 1). Since 1990, documented sightings of manatees outside of Florida have been increasing. This increase in sightings probably represents northward shifts in manatee distribution made possible by man-made sources of...
Authors
Robert K. Bonde, Lynn W. Lefebvre
Linkages between the snail kite population and wetland dynamics in a highly fragmented South Florida landscape: Chapter 6 Linkages between the snail kite population and wetland dynamics in a highly fragmented South Florida landscape: Chapter 6
No abstract available.
Authors
Wiley M. Kitchens, Robert E. Bennetts, Donald L. DeAngelis
The great alligator-caiman debate: Meditations on crocodilian life-history strategies The great alligator-caiman debate: Meditations on crocodilian life-history strategies
No abstract available.
Authors
C.L. Abercrombie, Kenneth G. Rice, C. A. Hope
Accumulation of 2,3,7,8-tetrachlorodibenzo-p-dioxin by rainbow trout (Onchorhynchus mykiss) at environmentally relevant dietary concentrations Accumulation of 2,3,7,8-tetrachlorodibenzo-p-dioxin by rainbow trout (Onchorhynchus mykiss) at environmentally relevant dietary concentrations
Rainbow trout were fed a diet containing 1.8, 18, or 90 pg/g 3H-2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) for up to 320 d. Concentrations of TCDD were determined in muscle, liver, and ovaries at 100, 150, 200, and 250 d. Concentrations of TCDD reached an apparent steady-state concentration in liver after 100 d of exposure, whereas concentrations in other tissues continued to increase...
Authors
Paul D. Jones, Kurunthachalam Kannan, John L. Newsted, Donald E. Tillitt, Lisa L. Williams, John P. Giesy
Occurrence of cyanazine compounds in groundwater: Degradates more prevalent than the parent compound Occurrence of cyanazine compounds in groundwater: Degradates more prevalent than the parent compound
A recently developed analytical method using liquid chromatography/mass spectrometry was used to investigate the occurrence of cyanazine and its degradates cyanazine acid (CAC), cyanazine amide (CAM), deethylcyanazine (DEC), and deethylcyanazine acid (DCAC) in groundwater. This research represents some of the earliest data on the occurrence of cyanazine degradates in groundwater...
Authors
D.W. Kolpin, E.M. Thurman, S. M. Linhart
Behavioral dysfunctions correlate to altered physiology in rainbow trout (Oncorynchus mykiss) exposed to cholinesterase-inhibiting chemicals Behavioral dysfunctions correlate to altered physiology in rainbow trout (Oncorynchus mykiss) exposed to cholinesterase-inhibiting chemicals
We selected four metrics of swimming behavior (distance swam, speed, rate of turning, and tortuosity of path) and the commonly used biochemical marker, brain cholinesterase (ChE) activity, to assess (1) the sensitivity and reliability of behavior as a potential biomarker in monitoring work, (2) the potential for these endpoints to be used in automated monitoring, and (3) the linkage...
Authors
S.K. Brewer, E. E. Little, A. J. DeLonay, S.L. Beauvais, S.B. Jones, Mark R. Ellersieck
Selenium, selected inorganic elements, and organochlorine pesticides in bottom material and biota from the Colorado River delta Selenium, selected inorganic elements, and organochlorine pesticides in bottom material and biota from the Colorado River delta
Concentrations of selenium (Se) in bottom material ranged from 0.6 to 5.0 μg g−1, and from 0.5 to 18.3 μg g−1in biota; 23% of samples exceeded the toxic threshold. Concentrations of DDE in biota exceeded the toxic threshold in 30% of the samples. Greater concentrations of selenium in biota were found at sites with strongly reducing conditions, no output, alternating periods of drying and...
Authors
J. Garcia-Hernandez, Kirk A. King, A.L. Velasco, E. Shumilin, M.A. Mora, E. P. Glenn
Sediment toxicity identification evaluation (TIE) studies at marine sites suspected of ordnance contamination Sediment toxicity identification evaluation (TIE) studies at marine sites suspected of ordnance contamination
A sediment quality assessment survey and subsequent toxicity identification evaluation (TIE) study was conducted at several sites in Puget Sound, Washington. The sites were previously suspected of contamination with ordnance compounds. The initial survey employed sea urchin porewater toxicity tests to locate the most toxic stations. Sediments from the most toxic stations were selected...
Authors
R.S. Carr, M. Nipper, J.M. Biedenbach, R.L. Hooten, K. Miller, S. Saepoff