Publications
Explore WARC's science publications.
Filter Total Items: 3348
Rapid growth of a Eurasian haplotype of Phragmites australis in a restored brackish marsh in Louisiana, USA
While numerous studies have documented patterns of invasion by non-indigenous plant species, few have considered the invasive properties of non-native genotypes of native species. Characteristics associated with specific genotypes, such as tolerance to disturbance, may mistakenly be applied to an entire species in the absence of genetic information, which consequently may affect management decisio
Authors
Rebecca J. Howard, Steven E. Travis, Benjamin A. Sikes
Effect of hydrological conditions on nitrous oxide, methane, and carbon dioxide dynamics in a bottomland hardwood forest and its implication for soil carbon sequestration
This study was conducted at three locations in a bottomland hardwood forest with a distinct elevation and hydrological gradient: ridge (high, dry), transition, and swamp (low, wet). At each location, concentrations of soil greenhouse gases (N2O, CH4, and CO2), their fluxes to the atmosphere, and soil redox potential (Eh) were measured bimonthly, while the water table was monitored every day. Resul
Authors
K. Yu, S.P. Faulkner, M.J. Baldwin
Representing general theoretical concepts in structural equation models: The role of composite variables
Structural equation modeling (SEM) holds the promise of providing natural scientists the capacity to evaluate complex multivariate hypotheses about ecological systems. Building on its predecessors, path analysis and factor analysis, SEM allows for the incorporation of both observed and unobserved (latent) variables into theoretically-based probabilistic models. In this paper we discuss the interfa
Authors
J.B. Grace, K.A. Bollen
Modeling mechanisms of vegetation change due to fire in a semi-arid ecosystem
Vegetation growth and community composition in semi-arid environments is determined by water availability and carbon assimilation mechanisms specific to different plant types. Disturbance also impacts vegetation productivity and composition dependent on area affected, intensity, and frequency factors. In this study, a new spatially explicit ecosystem model is presented for the purpose of simulatin
Authors
J.D. White, K.J. Gutzwiller, W.C. Barrow, L.J. Randall, P. Swint
Characteristics of mangrove swamps managed for mosquito control in eastern Florida, USA
Manipulations of the vegetation and hydrology of wetlands for mosquito control are common worldwide, but these modifications may affect vital ecosystem processes. To control mosquitoes in mangrove swamps in eastern Florida, managers have used rotational impoundment management (RIM) as an alternative to the worldwide practice of mosquito ditching. Levees surround RIM swamps, and water is pumped int
Authors
B. Middleton, D. Devlin, E. Proffitt, Karen McKee, K.F. Cretini
Emergence of functional responses from interactions of individuals
No abstract available.
Authors
Donald L. DeAngelis, Shu Ju, J. Nathaniel Holland
Ecology of coral reefs in the US Virgin Islands
The US Virgin Islands (USVI ) in the northeastern Caribbean, consist of St. Croix (207 km2), St. Thomas (83 km2), St. John (52 km2) and numerous smaller islands (Dammann and Nellis 1992). They are part of the Lesser Antilles and Leeward Islands on the eastern boundary of the Caribbean plate (Fig. 8.1). An extensive platform underlies St. Thomas and St. John and connects these islands to Puerto Ric
Authors
Caroline S. Rogers, Jeff Miller, Erinn Muller, Peter J Edmunds, Richard S. Nemeth, James P. Beets, Alan M. Friedlander, Tyler B. Smith, Rafe Boulon, Christopher F.G. Jeffrey, Charles Menza, Chris Caldow, Nasseer Idrisi, Barbara Kojis, Mark E. Monaco, Anthony S. Spitzack, Elizabeth H. Gladfelter, John C. Ogden, Zandy M Hillis-Star, Ian Lundgren, William B. Schill, Ilsa B. Kuffner, Laurie L. Richardson, Barry E. Devine, Joshua D. Voss
Decreased abundance of crustose coralline algae due to ocean acidification
Owing to anthropogenic emissions, atmospheric concentrations of carbon dioxide could almost double between 2006 and 2100 according to business-as-usual carbon dioxide emission scenarios1. Because the ocean absorbs carbon dioxide from the atmosphere2, 3, 4, increasing atmospheric carbon dioxide concentrations will lead to increasing dissolved inorganic carbon and carbon dioxide in surface ocean wat
Authors
Ilsa B. Kuffner, Andreas J Andersson, Paul L. Jokiel, Ku'ulei S. Rodgers, Fred T. Mackenzie
Documentation of a Gulf sturgeon spawning site on the Yellow River, Alabama, USA
The Gulf Sturgeon Recovery Plan (USFWS, GSMFC and NMFS 1995) stressed the need to provide maximum protection to Gulf sturgeon spawning habitat. The approach employed by various Gulf sturgeon researchers, including ourselves, to document spawning has been to identify potential spawning habitat on the basis of physical characteristics and/or tracking data, collect eggs, and then raise the eggs in th
Authors
Brian R. Kreiser, J. Berg, M. Randall, F. Parauka, S. Floyd, B. Young, Kenneth J. Sulak
Auditory monitoring of anuran populations: Chapter 16
No abstract available.
Authors
Michael E Dorcas, Steven J. Price, Susan C. Walls, William J. Barichivich
Calibration of GOES-derived solar radiation data using a distributed network of surface measurements in Florida, USA
Solar radiation data are critically important for the estimation of evapotranspiration. Analysis of visible-channel data derived from Geostationary Operational Environmental Satellites (GOES) using radiative transfer modeling has been used to produce spatially- and temporally-distributed datasets of solar radiation. An extensive network of (pyranometer) surface measurements of solar radiation in t
Authors
David M. Sumner, Chandra S. Pathak, John R. Mecikalski, Simon J. Paech, Qinglong Wu, Taiye Sangoyomi
Do non-native plant species affect the shape of productivity-diversity relationships?
The relationship between ecosystem processes and species richness is an active area of research and speculation. Both theoretical and experimental studies have been conducted in numerous ecosystems. One finding of these studies is that the shape of the relationship between productivity and species richness varies considerably among ecosystems and at different spatial scales, though little is known
Authors
J.M. Drake, E.E. Cleland, M. C. Horner-Devine, E. Fleishman, C. Bowles, M. D. Smith, K. Carney, S. Emery, J. Gramling, D.B. Vandermast, J.B. Grace