Wetland and Aquatic Research Center

Publications

Explore WARC's science publications.

Filter Total Items: 2,335
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Year Published: 1997

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...

Marmontel, M.; Humphrey, S.R.; O'Shea, T.J.
Population viability analysis of the Florida manatee (Trichechus manatus latirostris), 1976-1991; 1997; Article; Journal; Conservation Biology; Marmontel, M.; Humphrey, S. R.; O'Shea., T. J.

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Year Published: 1997

Potential for the Kentucky Dam tailwater of the Tennessee River to serve as a mussel refuge from invading zebra mussels

No abstract available.

Cummings, K.S.; Buchanan, A. C.; Mayer, C. A.; Naimo, T.J.; Sickel, J. B.; Herod, J.J.; Blalock, H.N.

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Year Published: 1997

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...

Allen, J.A.
Reforestation of bottomland hardwoods and the issue of woody species diversity; 1997; Article; Journal; Restoration Ecology; Allen, J.A.

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Year Published: 1997

Relative costs of prebasic and prealternate molts for male blue-winged teal

We compared masses of definitive basic and alternate plumages of male Blue-winged Teal (Anas discors) to evaluate the hypothesis that nutritional investments in basic and alternate plumages are related to the duration that plumages are worn and to assess the relative costs of prebasic and prealternate molts. Because these plumages are worn by...

Hohman, W.L.; Manley, S.W.; Richard, D.

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Year Published: 1997

Shell injuries and anomalies in an insular population of Florida box turtles (Terrapene carolina bauri)

Abstract not supplied at this time

Dodd, C.K.; Franz, R.; Johnson, S.A.
Shell injuries and anomalies in an insular population of Florida box turtles (Terrapene carolina bauri); 1997; Article; Journal; Herpetological Natural History; Dodd, C.K., Jr.; Franz, R.; Johnson., S. A.

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Year Published: 1997

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...

Loreau, M.; DeAngelis, D.L.
Source-sink dynamics and the coexistence of species on a single resource; 1997; Article; Journal; Theoretical Population Biology; Loreau, M.; DeAngelis., D.L.

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Year Published: 1997

Status and restoration of the Etowah River, an imperiled Southern Appalachian Ecosystem

Abstract not supplied at this time

Benz, G.W.; Collins, D.E.; Burkhead, N.M.; Walsh, S.J.; Freeman, B.J.; Williams, J.D.
Status and restoration of the Etowah River, an imperiled Southern Appalachian Ecosystem; 1997; Book chapter; Aquatic Fauna in Peril: The Southeastern Perspective. Special Publication 1. Southeast Aquatic Research Institute.; Burkhead, N. M.; Walsh, S. J.; Freeman, B. J.; Williams, J. D.

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Year Published: 1997

Status of aquatic mollusks in the southeastern United States: a downward spiral of diversity

Abstract not supplied at this time

Benz, G.W.; Collins, D.E.; Neves, R.J.; Bogan, A.E.; Williams, J.D.; Ahlstedt, S.A.; Hartfield, P.D.
Status of aquatic mollusks in the southeastern United States: a downward spiral of diversity; 1997; Book chapter; Aquatic Fauna in Peril: The Southeastern Perspective. Special Publication 1. Southeast Aquatic Research Institute.; Neves, R. J.; Bogan, A. E.; Williams, J. D.; Ahlstedt, S. A.; Hartfield., P. D.

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Year Published: 1997

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...

Norberg, J.; DeAngelis, D.L.
Temperature effects on stocks and stability of a phytoplankton-zooplankton model and the dependence on light and nutrients; 1997; Article; Journal; Ecological Modelling; Norberg, J.; DeAngelis., D.L.

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Year Published: 1997

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....

Basset, A.D.; DeAngelis, D.L.; Diffendorfer, J.E.
Stability and functional response of grazers on a landscape; 1997; Article; Journal; Ecological Modelling; Basset, A.D.; DeAngelis, D.L.; Diffendorfer., J.E.

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Year Published: 1997

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...

Taylor, K.L.; Grace, J.B.; Marx, B.D.

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Year Published: 1997

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...

Blaine, T.W.; DeAngelis, D.L.
The effects of spatial scale on predator-prey functional response; 1997; Article; Journal; Ecological Modelling; Blaine, T.W.; DeAngelis., D.L.