Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10483
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
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
Hydrologic conditions and water quality in an agricultural area in Kleberg and Nueces Counties, Texas, 1996-98 Hydrologic conditions and water quality in an agricultural area in Kleberg and Nueces Counties, Texas, 1996-98
During 1996?98, rainfall and runoff were monitored on a 49,680-acre agricultural watershed in Kleberg and Nueces Counties in South Texas. Nineteen rainfall samples were analyzed for selected nutrients, and runoff samples from 29 storms were analyzed for major ions, nutrients, and pesticides. Loads of nutrients in rainfall and loads of nutrients and pesticides in runoff were computed. For...
Authors
Darwin J. Ockerman, Brian L. Petri
Influence of natural factors on the quality of midwestern streams and rivers Influence of natural factors on the quality of midwestern streams and rivers
Streams flowing through cropland in the Midwestern Corn Belt differ considerably in their chemical and ecological characteristics, even though agricultural land use is highly intensive throughout the entire region. These differences likely are attributable to differences in riparian vegetation, soil properties, and hydrology. This conclusion is based on results from a study of the upper...
Authors
Stephen D. Porter, Mitchell A. Harris, Stephen J. Kalkhoff
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