Wetland and Aquatic Research Center
Explore WARC's science publications.
Energetic constraints and the paradox of a diffusing population in a heterogeneous environment
Previous mathematical analyses have shown that, for certain parameter ranges, a population, described by logistic equations on a set of connected patches, and diffusing among them, can reach a higher equilibrium total population when the local carrying capacities are heterogeneously distributed across patches, than when carrying capacities having...Wang, Yuanshi; DeAngelis, Donald L.
The effects of tropical cyclone-generated deposition on the sustainability of the Pearl River marsh, Louisiana: The importance of the geologic framework
Shoreline retreat is a tremendously important issue along the coast of the northern Gulf of Mexico, especially in Louisiana. Although this marine transgression results from a variety of causes, the crucial factor is the difference between marsh surface elevation and rising sea levels. In most cases, the primary cause of a marsh's inability to keep...McCloskey, Terrence A.; Smith, Christopher G.; Liu, Kam-Biu; Nelson, Paul R.
The influence of seep habitats on sediment macrofaunal biodiversity and functional traits
Chemosynthetic ecosystems in the Gulf of Mexico (GOM) support dense communities of seep megafaunal invertebrates that rely on endosymbiotic bacteria for nutrition. Distinct infaunal communities are associated with the biogenic habitats created by seep biota, where habitat heterogeneity and sediment geochemistry ...Demopoulos, Amanda W. J.; Bourque, Jill R.; Durkin, Alanna; Cordes, Erik E.
Introduction and dispersal of non-native bullseye snakehead Channa marulius (Hamilton, 1822) in the canal system of southeastern Florida, USA
An established population of bullseye snakehead (Channa marulius), a large predatory fish from southeastern Asia, was identified for the first time in North America from waters in southeastern Florida, USA, in the year 2000. Since then, it has dispersed throughout the extensive canal system in the area from West Palm Beach south to Miramar....Benson, Amy J.; Schofield, Pamela J.; Gestring, Kelly B.
Expectations of Maurepas Swamp response to a river reintroduction, Louisiana
Mississippi River reintroductions (freshwater diversions) into wetlands previously disconnected from the river have been implemented in southeastern Louisiana as a means to rehabilitate degraded and submerging wetlands. To date, all active Mississippi River reintroductions have targeted marsh habitat. However, a 57 cubic meter per second (2,000...Krauss, Ken W.; Shaffer, Gary P.; Keim, Richard F.; Chambers, Jim L.; Wood, William B.; Hartley, Stephen B.
Stable isotope analysis enhances our understanding of diamondback terrapin Malaclemys terrapin foraging ecology
Dietary studies on generalist predators may provide valuable information on spatial or temporal changes in the structure of ecological communities. We initiated this study to provide baseline data and determine the utility of stable isotope analysis (SIA) to evaluate the foraging strategies of an opportunistic reptilian predator, the diamondback...Denton, Mathew J.; Demopoulos, Amanda W.J.; Baldwin, John D.; Smith, Brian; Hart, Kristen M.
Integrating encounter theory with decision analysis to evaluate collision risk and determine optimal protection zones for wildlife
1.Better understanding human‐wildlife interactions and their links with management can help improve the design of wildlife protection zones. One example is the problem of wildlife collisions with vehicles or human‐built structures (e.g. power lines, wind farms). In fact, collisions between marine wildlife and watercraft are among the major threats...Udell, B.J.; Martin, Julien; Fletcher, R.J.; Bonneau, Mathieu; Edwards, Holly H.; Gowan, T.; Hardy, Stacie K.; Gurarie, E.; Calleson, C.S.; Deutsch, C.J.
Integrative taxonomy resolves taxonomic uncertainty for freshwater mussels being considered for protection under the U.S. Endangered Species Act
Objectively delimiting species boundaries remains an important challenge in systematics and becomes urgent when unresolved taxonomy complicates conservation and recovery efforts. We examined species boundaries in the imperiled freshwater mussel genus Cyclonaias(Bivalvia: Unionidae) using morphometrics, molecular phylogenetics, and...Johnson, Nathan A.; Smith, Chase H.; Pfeiffer, John M.; Randklev, Chalres R.; Williams, James D.; Austin, James D.
Identifying management-relevant research priorities for responding to disease-associated amphibian declines
A research priority can be defined as a knowledge gap that, if resolved, identifies the optimal course of conservation action. We (a group of geographically distributed and multidisciplinary research scientists) used tools from nominal group theory and decision analysis to collaboratively identify and prioritize information...Campbell Grant, Evan H.; Adams, M.J.; Fisher, Robert N.; Grear, Daniel A.; Halstead, Brian J.; Hossack, Blake R.; Muths, Erin L.; Richgels, Katherine L. D.; Russell, Robin E.; Smalling, Kelly L.; Waddle, J. Hardin; Walls, Susan C.; White, C. LeAnn
Novel ecological and climatic conditions drive rapid adaptation in invasive Florida Burmese pythons
Invasive species provide powerful in situ experimental systems for studying evolution in response to selective pressures in novel habitats. While research has shown that phenotypic evolution can occur rapidly in nature, few examples exist of genome‐wide adaptation on short ‘ecological’ timescales. Burmese pythons (Python molurus...Card, Daren C.; Perry, Blair W.; Adams, Richard H.; Schield, Drew R.; Young, Acacia S.; Andrew, Audra L.; Jezkova, Tereza; Pasquesi, Giulia I.M.; Hales, Nicole R.; Walsh, Matthew R.; Rochford, Michael R.; Mazzotti, Frank J.; Hart, Kristen M.; Hunter, Margaret; Castoe, Todd A.
Trends in nonindigenous aquatic species richness in the United States reveal shifting spatial and temporal patterns of species introductions
Understanding the spatial and temporal dynamics underlying the introduction and spread of nonindigenous aquatic species (NAS) can provide important insights into the historical drivers of biological invasions and aid in forecasting future patterns of nonindigenous species arrival and spread. Increasingly, public databases of species observation...Mangiante, Michael J.; Davis, Amy J. S.; Panlasigui, Stephanie; Neilson, Matthew E.; Pfingsten, Ian; Fuller, Pam L.; Darling, John A.
Informing research priorities for immature sea turtles through expert elicitation
Although sea turtles have received substantial focus worldwide, research on the immature life stages is still relatively limited. The latter is of particular importance, given that a large proportion of sea turtle populations comprises immature individuals. We set out to identify knowledge gaps and identify the main barriers hindering research in...Wildermann, Natalie E.; Gredzens, Christian; Avens, Larisa; Barrios-Garrido, Hector A.; Bell, Ian; Blumenthal, Janice; Bolten, Alan B.; McNeill, Joanne Braun; Casale, Paolo; Di Domenico, Maikon; Domit, Camila A.; Epperly, Sheryan P.; Godfrey, Matthew H.; Godley, Brendan J.; González-Carman, Victoria; Hamann, Mark; Hart, Kristen M.; Ishihara, Takashi; Mansfield, Kate; Metz, Tasha L.; Miller, Jeffrey D.; Pilcher, Nicolas J.; Read, Mark A.; Sasso, Christopher; Seminoff, Jeffrey A.; Seney, Erin E.; Southwood Williard, Amanda; Tomás, Jesús; Vélez-Rubio, Gabriela M.; Ware, Matthew; Williams, Jessica L.; Wyneken, Jeanette; Fuentes, Mariana M. P. B.