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

Ecosystems Mission Area, Wetland and Aquatic Research Center

January 1, 1992

Loggerhead sea turtle Caretta caretta (Linnaeus) Loggerhead sea turtle Caretta caretta (Linnaeus)

Abstract not supplied at this time

Authors

C.K. Dodd

Ecosystems Mission Area, Wetland and Aquatic Research Center

January 1, 1992

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

Water Resources Mission Area, New England Water Science Center

January 1, 1992

Interim report of the technical workshop on manatee population biology. Manatee Population Research Report No. 10 Interim report of the technical workshop on manatee population biology. Manatee Population Research Report No. 10

Abstract not supplied at this time

Authors

T. J. O'Shea, B.B. Ackerman

Ecosystems Mission Area, Wetland and Aquatic Research Center

January 1, 1992

A chemometric study of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans in Great Lakes fish A chemometric study of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans in Great Lakes fish

No abstract available.

Authors

D.L. Stalling, T.R. Schwartz, D. S. De Vault, W. Dunn, S. Wold, P. Berggvist, K. Wiberg, C. Rappe

Ecosystems Mission Area, Columbia Environmental Research Center

January 1, 1992

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

Water Resources Mission Area, South Atlantic Water Science Center (SAWSC)

January 1, 1992

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

Ecosystems Mission Area, Columbia Environmental Research Center, Upper Midwest Environmental Sciences Center

January 1, 1992