Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10419
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
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
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
Land-use classes to characterize watersheds and unsaturated zones in North Carolina Land-use classes to characterize watersheds and unsaturated zones in North Carolina
This web site contains the Federal Geographic Data Committee-compliant metadata (documentation) for digital data produced for the North Carolina, Department of Environment and Natural Resources, Public Water Supply Section, Source Water Assessment Program. The metadata are for 11 individual Geographic Information System data sets. An overlay and indexing method was used with the data to...
Authors
Silvia Terziotti, Jo Leslie Eimers