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Publications

Publications from USGS science centers throughout the Southeast Region.

Filter Total Items: 10486

Water quality of the Edwards Aquifer and streams recharging the aquifer in the San Antonio region, Texas Water quality of the Edwards Aquifer and streams recharging the aquifer in the San Antonio region, Texas

The Edwards aquifer in south-central Texas is one of the most productive and most important aquifers in the State, with an average annual discharge of about 608,000 acre-ft of water during 1932-82 (Reeves and Ozuna, 1985). The Edwards aquifer is the principal source of water for municipal, industrial, and irrigation use in all or parts of five counties- Bexar, Comal, hays, Medina, and...
Authors
W.R. Roddy

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

[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

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

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
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