Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 9969
Polychlorinated biphenyl congeners in emergent mayflies from the upper Mississippi River
We determined polychlorinated biphenyls (pcbs) in emergent mayflies (hexagenia bilineata) from a 1250-km reach of the upper mississippi river (UMR). Total pcb concentrations (sum of 125 congeners) ranged from 0.21 To 4.1 Mu g/g of dry weight (1.2-29 mu g/g of lipid weight). Concentrations were highest in pools near the twin cities and the quad cities metropolitan areas. Longitudinal movement of pc
Authors
M.T. Steingraeber, T.R. Schwartz, J.G. Wiener, J.A. Lebo
Intraspecific variation in the response of Taxodium distichum seedlings to salinity
Seedlings of 15 open-pollinated families of baldcypress (Taxodium distichum) were tested for their tolerance to combined salinty and flooding stress. Ten of the families were from coastal locations in Louisiana or Alabama, USA, that were slightly brackish. The other families were from locations not affected by saltwater intrusion. Five salinity levels were investigated--0,2,4,6, and 8 g -1 artific
Authors
J. A. Allen, J. L. Chambers, D. McKinney
Environmental contaminants in redheads wintering in coastal Louisiana and Texas
Whole body and liver analyses indicated that wintering redheads (Aythya americana; n = 70) in coastal Louisiana (one site) and Texas (two sites) were relatively free of contamination with common trace elements, organochlorines, and hydrocarbons. Most trace elements, including As, Cr, Hg, Mg, Mn, Ni, Pb, Se, Sr, and Zn, were within background concentrations in livers; levels of B, Cd, Cu, and Fe
Authors
T.C. Michot, T. W. Custer, A.J. Nault, C. A. Mitchell
Prospects for improving the salt tolerance of forest trees: A review
Three major themes related to the improvement of salt tolerance in forest tree species are examined. First, evidence demonstrating that substantial intraspecific variation in salt tolerance exists in many species is presented. This evidence is important because it suggests that efforts to improve salt tolerance through conventional plant breeding techniques are justified. Second, the physiological
Authors
J. A. Allen, J. L. Chambers, M. Stine
Portable platforms for setting rocket nets in open-water areas
Portable platforms for setting rocket nets in open-water habitats were developed and used to capture 1116 waterfowl of seven species during September and October 1991 and 1992 in southwestern Louisiana. Incidence of mortality (1% of captured birds) and escape (3% of captured birds) was low. Rocket-netting from platforms was a reliable and efficient technique for capturing waterfowl, and should be
Authors
R. R. Cox, A. D. Afton
Recent accretion in two managed marsh impoundments in coastal Louisiana
Recent accretion was measured by the feldspar marker horizon method in two gravity-drained, managed, marsh impoundments and unmanaged reference marshes located on the rapidly subsiding coast of Louisiana. Water level management was designed to limit hydrologic exchange to the managed marsh by regulating the direction and rate of water flows. During a drawdown-flooding water management cycle, the u
Authors
Donald R. Cahoon
1994 Annual summary: ENTERGY Lake Dardanelle fish and zebra mussel study
Abstract not supplied at this time
Authors
J.N. Stoeckel, C.J. Gagen, J.J. Herod, R.K. Beadel, S.D. Shook, C.S. Howell, P. Penny
Coral reef monitoring manual for the Caribbean and Western Atlantic
Abstract not supplied at this time
Authors
C.S. Rogers, G. Garrison, R. Grober, Z. Hillis, M.A. Franke
1993 Annual report on the radio telemetry of manatees in Puerto Rico
Abstract not supplied at this time
Authors
J. P. Reid, R. K. Bonde, Dean E. Easton, H. I. Kochman
The Freshwater Fishes of Virginia
Abstract not supplied at this time
Authors
R.E. Jenkins, N.M. Burkhead
Standard operating procedures for zebra mussel monitoring project with ENTERGY Corporation
Abstract not supplied at this time
Authors
C.J. Gagen, J.N. Stoeckel, R.K. Beadel, J.J. Herod, D.O. McCollum
Standard operating procedures for the fish monitoring project with ENTERGY Corporation
Abstract not supplied at this time
Authors
C.J. Gagen, J.N. Stoeckel, R.K. Beadel, J.J. Herod, D.O. McCollum