Publications
Explore WARC's science publications.
Filter Total Items: 3377
Imperiled amphibians: A historical perspective
Abstract not supplied at this time
Authors
C. K. Dodd
Status and restoration of the Etowah River, an imperiled Southern Appalachian Ecosystem
Abstract not supplied at this time
Authors
N.M. Burkhead, S. J. Walsh, B. J. Freeman, J.D. Williams
Use of inexpensive pressure transducers for measuring water levels in wells
Frequent measurement of below ground water levels at multiple locations is an important component of many wetland ecosystem studies. These measurements, however, are usually time consuming, labor intensive, and expensive. This paper describes a water-level sensor that is inexpensive and easy to construct. The sensor is placed below the expected low water level in a shallow well and, when connected
Authors
B. D. Keeland, J.F. Dowd, W.S. Hardegree
Long-term growth trends of baldcypress (Taxodium distichum (L.) rich.) at Caddo Lake, Texas
Caddo Lake, situated on the border of northeast Texas and northwest Louisiana, USA is a medium-sized lake dominated by stands of baldcypress (Taxodiwn distichum). A study of tree growth was initiated at Caddo Lake to address concerns about the health of the baldcypress ecosystem. The lake has been subjected to several dramatic water-level changes over the past 200 years, including water-level stab
Authors
B. D. Keeland, P.J. Young
Vertebrate herbivory in managed coastal wetlands: A manipulative experiment
Structural marsh management and nutria herbivory are both believed to strongly influence plant production in the brackish, deltaic marshes of coastal Louisiana, USA. Previous studies have tested the effects of structural management on aboveground biomass after implementing management, but very few studies have collected data before and after management. Thus, to test the effects of structural mars
Authors
L.A. Johnson, A.L. Foote
The effects of herbivory on neighbor interactions along a coastal marsh gradient
Many current theories of community function are based on the assumption that disturbances such as herbivory act to reduce the importance of neighbor interactions among plants. In this study, we examined the effects of herbivory (primarily by nutria, Myocastor coypus) on neighbor interactions between three dominant grasses in three coastal marsh communities, fresh, oligohaline, and mesohaline. The
Authors
K.L. Taylor, J.B. Grace, B.D. Marx
Conserving coastal wetlands despite sea-level rise
Abstract not supplied at this time
Authors
W.K. Nuttle, T. J. Smith
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. Temperature increa
Authors
J. Norberg, D.L. DeAngelis
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 method require
Authors
J.J. Lorenz, C.C. McIvor, G. V. N. Powell, P. C. Frederick
Population viability analysis of the Florida manatee (Trichechus manatus latirostris), 1976-1991
Recent development of age-determination techniques for Florida manatees (Trichechus manatus latirostris) has permitted derivation of age-specific data on reproduction and survival of a sample of 1212 carcasses obtained throughout Florida from 1976–1991. Population viability analysis using these data projects a slightly negative growth rate (−0.003) and an unacceptably low probability of persistenc
Authors
M. Marmontel, S.R. Humphrey, T. J. O'Shea
Source-sink dynamics and the coexistence of species on a single resource
We investigate the potential for coexistence of species that compete for a shared resource when the resource occurs in both a source area acting as a refuge and a sink area where it is used by the competing species. Our model shows that the mixing rate between the source and sink resource populations has a dramatic influence on the outcome of competition. When there is a strict sink–source depende
Authors
M. Loreau, D.L. DeAngelis
A simulation study of the spatiotemporal dynamics of the Unionid mussels
Abstract not supplied at this time
Authors
Hooi-Ling Lee, D.L. DeAngelis