Publications
Explore WARC's science publications.
Filter Total Items: 3543
Comparative sensitivity of Selenastrum capricornutum and Lemna minor to sixteen herbicides Comparative sensitivity of Selenastrum capricornutum and Lemna minor to sixteen herbicides
Aquatic plant toxicity tests are frequently conducted in environmental risk assessments to determine the potential impacts of contaminants on primary producers. An examination of published plant toxicity data demonstrates that wide differences in sensitivity can occur across phylogenetic groups of plants. Yet relatively few studies have been conducted with the specific intent to compare...
Authors
J.F. Fairchild, D. S. Ruessler, P.S. Haverland, A.R. Carlson
Temperature effects on stocks and stability of a phytoplankton-zooplankton model and the dependence on light and nutrients Temperature effects on stocks and stability of a phytoplankton-zooplankton model and the dependence on light and nutrients
A model of a closed phytoplankton—zooplankton ecosystem was analyzed for effects of temperature on stocks and stability and the dependence of these effects on light and total nutrient concentration of the system. An analysis of the steady state equations showed that the effect of temperature on zooplankton and POM biomass was levelled when primary production is nutrient limited...
Authors
J. Norberg, D.L. DeAngelis
Effects of habitat suitability on the survival of relocated freshwater mussels Effects of habitat suitability on the survival of relocated freshwater mussels
Freshwater mussels are often relocated from existing beds for both conservation and management reasons. In this study, we empirically tested whether the habitat type at the destination site was important in predicting the success of mussel relocation. In 1993, four species of freshwater mussels were relocated in the Apalachicola River in Florida, into three distinct habitat types: stable...
Authors
Hannah M. Hamilton, Jayne Brim-Box, Robert M. Dorazio
AVHRR imagery used to identify hurricane damage in a forested wetland of Louisiana AVHRR imagery used to identify hurricane damage in a forested wetland of Louisiana
Certain events provide a unique opportunity to test the monitoring capability of AVHBR imagery. On 26 August 1992, Hurricane Andrew passed through Louisiana, impacting a large area of forested wetlands. One response to the widespread defoliation resulting from the hurricane impact was an abnormal bloom of new leaves and new growth in the underlying vegetation between September and...
Authors
Elijah W. Ramsey, D.K. Chappell, D.G. Baldwin
Potential for the Kentucky Dam tailwater of the Tennessee River to serve as a mussel refuge from invading zebra mussels Potential for the Kentucky Dam tailwater of the Tennessee River to serve as a mussel refuge from invading zebra mussels
No abstract available.
Authors
J. B. Sickel, J.J. Herod, H.N. Blalock
A rop net and removable walkway used to quantitatively sample fishes over wetland surfaces in the dwarf mangrove of the Southern Everglades A rop net and removable walkway used to quantitatively sample fishes over wetland surfaces in the dwarf mangrove of the Southern Everglades
We describe a 9 m2 drop net and removable walkways designed to quantify densities of small fishes in wetland habitats with low to moderate vegetation density. The method permits the collection of small, quantitative, discrete samples in ecologically sensitive areas by combining rapid net deployment from fixed sites with the carefully contained use of the fish toxicant rotenone. This...
Authors
J.J. Lorenz, C.C. McIvor, G.V.N. Powell, P. C. Frederick
Remote sensing at the Southern Science Center Remote sensing at the Southern Science Center
No abstract available
Authors
D.K. Chappell, S.C. Laine
1995 Scanned aerial photography of the Kisatchie National Forest in Louisiana 1995 Scanned aerial photography of the Kisatchie National Forest in Louisiana
No abstract available.
Authors
Calvin P. O’Neil, Lawrence R. Handley, Stephen Hartley, James B. Johnston, B. Coffland, Lynn Schoelerman
Prevalence of double wing molt in free-living ruddy ducks Prevalence of double wing molt in free-living ruddy ducks
No abstract available
Authors
William L. Hohman
Impacts of elevated inorganic carbon concentrations of the autotrophic components of coastal submersed macrophyte communities Impacts of elevated inorganic carbon concentrations of the autotrophic components of coastal submersed macrophyte communities
No abstract available.
Authors
William M. Rizzo, Hilary A. Neckles, Ronald G. Boustany, David R. Meaux, Martha R. Griffis
A spatial decision support system for coastal management: A research project at the National Wetlands Research Center of the U.S. Geological Survey A spatial decision support system for coastal management: A research project at the National Wetlands Research Center of the U.S. Geological Survey
Environmental resource managers and scientists are being challenged in developing strategies to manage complex coastal systems. From an ecological perspective, there are myriad dynamic, interrelated natural and human-induced processes that affect the health and stability of coastal systems. However, the problems associated with managing coastal resources usually transcend purely...
Authors
Wei Ji, James B. Johnston