Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10362
The use of tumors in wild populations of fish to assess ecosystem health The use of tumors in wild populations of fish to assess ecosystem health
Evidence has linked toxicants in aquatic systems with cancer in fish and population level effects on species. Thus some types of tumors may be useful monitors of ecosystem health, at least as affected by genotoxins and promoters. However, tumors caused by purely genetic mechanisms or by virus would not be good indicators. Only neoplasms which have chemicals as a portion of their etiology...
Authors
Paul C. Baumann
Redistribution of soil nitrogen, carbon and organic matter by mechanical disturbance during whole-tree harvesting in northern hardwoods Redistribution of soil nitrogen, carbon and organic matter by mechanical disturbance during whole-tree harvesting in northern hardwoods
To investigate whether mechanical mixing during harvesting could account for losses observed from forest floor, we measured surface disturbance on a 22 ha watershed that was whole-tree harvested. Surface soil on each 10 cm interval along 81, randomly placed transects was classified immediately after harvesting as mineral or organic, and as undisturbed, depressed, rutted, mounded...
Authors
D.F. Ryan, Thomas G. Huntington, Martin C. Wayne
Herbicide transport in rivers: Importance of hydrology and geochemistry in nonpoint-source contamination Herbicide transport in rivers: Importance of hydrology and geochemistry in nonpoint-source contamination
Alachlor, atrazine, cyanazine, metolachlor, and metribuzin were measured at six sites during 1984 and 1985 in large subbasins within the Cedar River, IA. A computer model separated the Cedar River discharge hydrograph into groundwater and overland-flow components. The concentration of herbicides in the river when groundwater was the major flow component was less than 1.0 μg/L and...
Authors
P. J. Squillace, E.M. Thurman
Cadmium and mercury in emergent mayflies (Hexagenia bilineata) from the upper Mississippi River Cadmium and mercury in emergent mayflies (Hexagenia bilineata) from the upper Mississippi River
Burrowing mayflies (Hexagenia bilineata) were analyzed to assess longitudinal patterns in their cadmium and mercury content along the upper Mississippi River. Emergent mayflies (subimagoes and imagoes) were collected in 1988 at 34 sites (25 navigation pools), extending 1260 km from Little Falls, Minnesota, downstream to St. Louis, Missouri. Cadmium concentrations in composite samples of...
Authors
J. Therese Dukerschein, James G. Wiener, Ronald G. Rada, Mark T. Steingraeber
Cypress-tupelo swamp restoration in southern Louisiana Cypress-tupelo swamp restoration in southern Louisiana
No abstract available.
Authors
J. A. Allen
[Book review] Life History and Ecology of the Slider Turtle, by J. W. Gibbons [Book review] Life History and Ecology of the Slider Turtle, by J. W. Gibbons
Review of: Life History and Ecology of the Slider Turtle. J. W. Gibbons. Smithsonian, 2000. ISBN: 1560982136.
Authors
C.K. Dodd
Two-dimensional circulation modeling of the Pamlico River estuary, North Carolina Two-dimensional circulation modeling of the Pamlico River estuary, North Carolina
A two dimensional, vertically averaged, unsteady flow model was applied to a 50- kilometer reach of the Pamlico River estuary, North Carolina. The model computational grid, which consists of about 16,000 square cells, each 200 meters on a side, was developed from more than one million depth soundings. Information from a comprehensive data-collection network, including six water-level...
Authors
G. L. Giese, Jerad Bales
Effects of impoundments on freshwater mussels (Mollusca: Bivalvia: Unionidae) in the main channel of the Black Warrior and Tombigbee rivers in western Alabama Effects of impoundments on freshwater mussels (Mollusca: Bivalvia: Unionidae) in the main channel of the Black Warrior and Tombigbee rivers in western Alabama
Abstract not supplied at this time
Authors
J.D. Williams, S.L.H. Fuller, R. Grace
Study links Big Cypress fox squirrel to golf courses Study links Big Cypress fox squirrel to golf courses
Abstract not supplied at this time
Authors
P.G.R. Jodice, J.R. Snyder
The non-marine herpetofauna of Egmont Key, Hillsborough County, Florida The non-marine herpetofauna of Egmont Key, Hillsborough County, Florida
Abstract not supplied at this time
Authors
R. Franz, C.K. Dodd, A.M. Bard
Biological diversity of a temporary pond herpetofauna in north Florida sandhills Biological diversity of a temporary pond herpetofauna in north Florida sandhills
From 1985 through 1990, the herpetofauna of a temporary pond in an uplands longleaf pine sandhills community in north-central Florida was monitored. A drift fence completely encircled the pond. Animals were captured in pitfall traps and marked as they entered and exited the pond basin. I captured 16 155 individuals of 42 species (16 amphibians, 26 reptiles). The species richness...
Authors
C.K. Dodd