Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10386
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
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
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
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
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
A national pilot study of mercury contamination of aquatic ecosystems along multiple gradients" Bioaccumulation in fish A national pilot study of mercury contamination of aquatic ecosystems along multiple gradients" Bioaccumulation in fish
Water, sediment, and fish were sampled in the summer and fall of 1998 at 106 sites from 20 U.S. watershed basins to examine relations of mercury (Hg) and methylmercury (MeHg) in aquatic ecosystems. Bioaccumulation of Hg in fish from these basins was evaluated in relation to species, Hg and MeHg in surficial sediment and water, and watershed characteristics. Bioaccumulation was strongly...
Authors
William G. Brumbaugh, David P. Krabbenhoft, Dennis R. Helsel, James G. Wiener, Kathy R. Echols
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
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
Abstracts from "Coastal Marsh Dieback in the Northern Gulf of Mexico: Extent, Causes, Consequences, and Remedies Abstracts from "Coastal Marsh Dieback in the Northern Gulf of Mexico: Extent, Causes, Consequences, and Remedies
In the spring of 2000, scientists discovered a new and unprecedented loss of salt marsh vegetation in coastal Louisiana and other areas along the northern coast of the Gulf of Mexico. This dieback of salt marsh vegetation, sometimes called the brown marsh phenomenon', primarily involved the rapid browning and dieback of smooth cordgrass (Spanina alterniflora). Coastal Louisiana has...
Authors
C. Edward Proffitt, Tammy Michelle Charron