Publications
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Habitat selection by three littoral zone fishes: effects of predation pressure, plant density and macrophyte type Habitat selection by three littoral zone fishes: effects of predation pressure, plant density and macrophyte type
We conducted laboratory experiments which demonstrated that three littoral zone fishes differentially selected among three macrophytes when seeking refuge from predation. In the presence of a predator (a juvenile Micropterus salmoides), mosquitofish (Gambusia holbrooki), sailfin mollies (Poecilia latipinna). and dollar sunfish (Lepomis marginatus) displayed ferential use of four tank...
Authors
J.H. Chick, C.C. McIvor
The interaction of spatial scale and predator-prey functional response The interaction of spatial scale and predator-prey functional response
Predator-prey models with a prey-dependent functional response have the property that the prey equilibrium value is determined only by predator characteristics. However, in observed natural systems (for instance, snail-periphyton interactions in streams) the equilibrium periphyton biomass has been shown experimentally to be influenced by both snail numbers and levels of available...
Authors
T.W. Blaine, D.L. DeAngelis
The effect of functional response on stability of a grazer population on a landscape The effect of functional response on stability of a grazer population on a landscape
The dynamics of interacting consumer and resource populations is one of the most thoroughly studied problems of theoretical population biology. Among the key results from the study of simple mathematical models of interacting populations is that the Holling Type 2 functional response tends to be unstable for a wide range of realistic parameters. Functional responses such as Holling Type...
Authors
A.D. Basset, D.L. DeAngelis, J.E. Diffendorfer
Blue catfish (Ictalurus furcatus ; Ictaluridae) predation on the zebra mussel in the Ohio River near Paducah, Kentucky Blue catfish (Ictalurus furcatus ; Ictaluridae) predation on the zebra mussel in the Ohio River near Paducah, Kentucky
Abstract not supplied at this time
Authors
J.J. Herod, T.L. Frye, James B. Sickel
Coastal wetlands and global change: overview Coastal wetlands and global change: overview
The potential impacts of climate change are of great practical concern to those interested in coastal wetland resources. Among the areas of greatest risk in the United States are low-lying coastal habitats with easily eroded substrates which occur along the northern Gulf of Mexico and southeast Atlantic coasts. The Intergovernmental Panel on Climate Change (IPCC) and the World...
Authors
G.R. Guntenspergen, B. Vairin, V.R. Burkett
Variation in thermal tolerance and routine metabolism among spring- and stream dwelling freshwater sculpins (Teleostei: Cottidae) of the southeastern United States Variation in thermal tolerance and routine metabolism among spring- and stream dwelling freshwater sculpins (Teleostei: Cottidae) of the southeastern United States
Evolutionary theory predicts that some aquatic organisms may adapt by directional selection to limiting physical environmental conditions, yet empirical data are conflicting. We sought to test the assumption that sculpins (family Cottidae) inhabiting thermally stable springs of the southeastern United States differ in temperature tolerance and metabolism from populations inhabiting more...
Authors
S. J. Walsh, D. C. Haney, C. M. Timmerman
A structural equation model of plant species richness and its application to a coastal wetland A structural equation model of plant species richness and its application to a coastal wetland
Studies of plant species richness have often emphasized the role of either community biomass (as an indicator of density effects) or abiotic factors. In this article we present a general model that simultaneously examines the relative importance of abiotic and density effects. General and specific models were developed to examine the importance of abiotic conditions, disturbance, and...
Authors
J.B. Grace, B.H. Pugesek
Decomposition of saltmeadow cordgrass (Spartina patens) in Louisiana coastal marshes Decomposition of saltmeadow cordgrass (Spartina patens) in Louisiana coastal marshes
In Louisiana, plant production rates and associated decomposition rates may be important in offsetting high rates of land loss and subsidence in organic marsh soils. Decomposition of Spartina patens shoot and leaf material was studied by using litter bags in mesohaline marshes in the Barataria and Terrebonne basins of coastal Louisiana. Spartina patens decomposed very slowly with an...
Authors
A.L. Foote, K.A. Reynolds
The jumping crocs of the Adelaide River The jumping crocs of the Adelaide River
Abstract not supplied at this time
Authors
C.K. Dodd
Reforestation of bottomland hardwoods and the issue of woody species diversity Reforestation of bottomland hardwoods and the issue of woody species diversity
Bottomland hardwood forests in the southcentral United States have been cleared extensively for agriculture, and many of the remaining forests are fragmented and degraded. During the last decade, however, approximately 75,000 ha of land-mainly agricultural fields-have been replanted or contracted for replanting, with many more acres likely to be reforested in the near future. The...
Authors
J. A. Allen
Shell injuries and anomalies in an insular population of Florida box turtles (Terrapene carolina bauri) Shell injuries and anomalies in an insular population of Florida box turtles (Terrapene carolina bauri)
Abstract not supplied at this time
Authors
C.K. Dodd, R. Franz, S. A. Johnson