Wetland and Aquatic Research Center
Explore WARC's science publications.
Per- and polyfluoroalkyl substances (PFAS) in plasma of the West Indian manatee (Trichechus manatus)
Per- and polyfluoroalkyl substances (PFAS) are ubiquitous, synthetic anthropogenic chemicals known to infiltrate and persist in biological systems as a result of their stability and bioaccumulation potential. This study investigated 15 PFAS, including short-chain carboxylic and sulfonic acids, and their presence in a threatened herbivore...Palmer, Kady; Bangma, Jacqueline T.; Reiner, Jessica L.; Bonde, Robert K.; Korte, Jeffrey E.; Boggs, Ashley S. P.; Bowden, John A.
Research priorities for freshwater mussel conservation assessment
Freshwater mussels are declining globally, and effective conservation requires prioritizing research and actions to identify and mitigate threats impacting mussel species. Conservation priorities vary widely, ranging from preventing imminent extinction to maintaining abundant populations. Here, we develop a portfolio of priority research topics...Ferreira-Rodríguez, Noé ; Akiyama, Yoshihiro B.; Aksenova, Olga V.; M. Christopher Barnhart; Bespalaya, Yulia V.; Bogan, Arthur E.; Bolotov, Ivan N; Budha, Prem B.; Clavijo, Cristhian; Clearwater, Susan J.; Darrigran, Gustavo; Tu Do, Van ; Douda, Karel ; Froufe, Elsa ; Gumpinger, Clemens ; Henrikson, Lennart ; Humphrey, Chris L. ; Johnson, Nathan A.; Klishko, Olga; Klunzinger, Michael W. ; Kovitvadhi, Satit ; Kovitvadhi, Uthaiwan ; Lajtner, Jasna ; Lopes-Lima, Manuel ; Moorkens, Evelyn A. ; Nagayama, Shigeya ; Nagel, Karl-Otto ; Nakano, Mitsunori ; Negishi, Junjiro N. ; Ondina, Paz ; Oulasvirta, Panu ; Prié, Vincent ; Riccardi, Nicoletta ; Rudzīte, Mudīte ; Sheldon, Fran ; Sousa, Ronaldo ; Strayer, David L.; Takeuchi, Motoi ; Taskinen, Jouni ; Teixeira, Amilcar ; Tiemann, Jeremy S.; Urbańska, Maria ; Varandas, Simone ; Vinarski, Maxim V. ; Wicklow, Barry J.; Zając, Tadeusz ; Vaughn, Caryn C.
Assessment of bird exposure to lead at Tyndall and Beale Air Force Bases, 2016–17
Soil contamination by lead (Pb) from past small munitions training on Beale Air Force Base, California, and Tyndall Air Force Base, Florida, may result in adverse effects for passerine birds that utilize the locations. A study was conducted during 2016-17 by the U.S. Geological Survey, in cooperation with the U.S. Fish and Wildlife Service and U.S...Bargar, Timothy A.
Patterning emergent marsh vegetation assemblages in coastal Louisiana, USA, with unsupervised artificial neural networks
QuestionAre self‐organizing maps (SOMs) useful for patterning coastal wetland vegetation communities? Do SOMs provide robust alternatives to traditional classification methods, particularly when underlying species response functions are unknown or difficult to approximate, or when a need exists to continuously classify new samples obtained under...Snedden, Gregg A.
Defensible standardized ploidy assessments for Grass Carp (Ctenopharyngodon idella, Cyprinidae) intercepted from the commercial supply chain
Although methods are in place through the U.S. Fish and Wildlife (USFWS) program for ploidy testing of feral caught Grass Carp (Ctenopharyngodon idella) and black carp (Mylopharyngodon piceus), no guidelines exist for carp hauled across state lines. Using 1200 Grass Carp purchased by undercover Ohio law enforcement during 2015–2016, we...Jenkins, Jill A.; Chauvin, Megan D.; Johnson, Darren; Brown, Bonnie L.; Bailey, Jennifer; Kelly, Anita M.; Kinter, Bryan T.
Decision-making in agent-based modeling: A current review and future prospectus
All basic processes of ecological populations involve decisions; when and where to move, when and what to eat, and whether to fight or flee. Yet decisions and the underlying principles of decision-making have been difficult to integrate into the classical population-level models of ecology. Certainly, there is a long history of modeling...DeAngelis, Donald L.; Diaz, Stephanie G.
Morphology and genetics of Lythrum salicaria from latitudinal gradients of the Northern Hemisphere grown in cold and hot common gardens
The aim of this project was to compare the phenotypic responses of global populations of Lythrum salicaria in cold/dry and hot/humid environments to determine if phenotypic plasticity varied between the native and invasive ranges, and secondarily if this variation was linked to genetic diversity. Common garden studies were conducted in...Middleton, Beth A.; Travis, Steven E.; Kubátová, Barbora; Johnson, Darren; Edwards, Keith R.
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.
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.
Carbon storage potential in a recently created brackish marsh in eastern North Carolina, USA
Carbon (C) sequestration through accumulated plant biomass and storage in soils can potentially make wetland ecosystems net C sinks. Here, we collected GHG flux, plant biomass, and litter decomposition data from three distinct vegetation zones (Spartinaalterniflora, Juncus roemerianus and Spartina patens) on a 7-...Shiau, Yo-Jin; Burchell, Michael R.; Krauss, Ken W.; Broome, Stephen W.; Birgand, Francois
Hyperspectral remote sensing of wetland vegetation
Chapter 11 by Ramsey and Rangoonwala provides an overview of how hyperspectral imaging (HSI) advances the mapping of coastal wetlands that comprise a unique variety of plant species, forms, and associations. Each description begins by seeking to uncover the relationship between canopy hyperspectral reflectance and one or more of the aggregated...Ramsey, Elijah; Rangoonwala, Amina
Updated statewide abundance estimates for the Florida manatee
Knowing how many manatees live in Florida is critical for conservation and management of this threatened species. Martin et al. (2015) flew aerial surveys in 2011–2012 and estimated abundance in those years using advanced techniques that incorporated multiple data sources. We flew additional aerial surveys in 2015–2016 to count manatees and again...Hostetler, Jeffrey A.; Edwards, Holly H.; Martin, Julien; Schueller, Paul