Wetland and Aquatic Research Center

Publications

Explore WARC's science publications.

Filter Total Items: 2,469
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Year Published: 2020

Dispersal asymmetry in a two-patch system with source–sink populations

This paper analyzes source–sink systems with asymmetric dispersal between two patches. Complete analysis on the models demonstrates a mechanism by which the dispersal asymmetry can lead to either an increased total size of the species population in two patches, a decreased total size with persistence in the patches, or even extinction in both...

Wu, Hong; Wang, Yuanshi; Li, Yufeng; DeAngelis, Donald L.

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Year Published: 2020

Using integrated population models for insights into monitoring programs: An application using pink-footed geese

Development of integrated population models (IPMs) assume the absence of systematic bias in monitoring programs, yet many potential sources of systematic bias in monitoring data exist (e.g., under-counts of abundance). By integrating multiple sources of data, we can assess whether various sources of monitoring data provide consistent inferences...

Johnson, Fred; Zimmerman, Guthrie S.; Jensen, Gitte H.; Clausen, Kevin K.; Frederiksen, Morten; Madsen, Jesper

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Year Published: 2020

Petroleum hydrocarbons in semipermeable membrane devices deployed in the Northern Gulf of Mexico and Florida keys following the Deepwater Horizon incident

The Deepwater Horizon (DWH) oil spill from April to July of 2010 contaminated Gulf of Mexico waters through release of an estimated 4.1 × 106 barrels of oil. Beginning in June of 2010, semipermeable membrane devices (SPMDs) were deployed near areas with sensitive marine habitats (Alabama Alps and Western Shelf) potentially exposed...

Bargar, Timothy; Alvarez, David; Stout, Scott A.

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Year Published: 2020

Asymptotic population abundance of a two-patch system with asymmetric diffusion

This paper considers a two-patch system with asymmetric diffusion rates, in which exploitable resources are included. By using dynamical system theory, we exclude periodic solution in the one-patch subsystem and demonstrate its global dynamics. Then we exhibit uniform persistence of the two-patch system and demonstrate uniqueness of the positive...

Fang, Mengting; Wang, Yuanshi; Chen, Mingshu; DeAngelis, Donald L.

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Year Published: 2020

Predicting functional responses in agro-ecosystems from animal movement data to improve management of invasive pests

Functional responses describe how changing resource availability affects consumer resource use, thus providing a mechanistic approach to prediction of the invasibility and potential damage of invasive alien species (IAS). However, functional responses can be context dependent, varying with resource characteristics and availability, consumer...

Wilber, Mark Q.; Chinn, Sarah M.; Beasley, James C.; Boughton, Raoul; Brook, Ryan K.; Ditchkoff, Stephen S.; Fischer, Justin W.; Hartley, Stephen B.; Holmstrom, Lindsey K.; Kilgo, John C.; Lewis, Jesse S.; Miller, Ryan S.; Snow, Nathan P.; Vercauteren, Kurt C.; Wisely, Samantha M.; Webb, Colleen T.; Pepin, Kim M.

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Year Published: 2020

Quantifying hydrologic controls on local- and landscape-scale indicators of coastal wetland loss

Background and AimsCoastal wetlands have evolved to withstand stressful abiotic conditions through the maintenance of hydrologic feedbacks among vegetation production and flooding. However, disruption of these feedbacks can lead to ecosystem collapse, or a regime shift from vegetated wetland to open water. To prevent the loss of critical coastal...

Stagg, Camille; Osland, Michael; Moon, Jena A.; Hall, Courtney; Feher, Laura; Jones, William R.; Couvillion, Brady; Hartley, Stephen B.; Vervaeke, William

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Year Published: 2020

Winter climate change and the poleward range expansion of a tropical invasive tree (Brazilian pepper ‐ Shinus terebinthifolius)

Winter climate change is expected to lead to the tropicalization of temperate ecosystems, where tropical species expand poleward in response to a decrease in the intensity and duration of winter temperature extremes (i.e., freeze events). In the southeastern United States, freezing temperatures control the northern range limits of many invasive...

Osland, Michael; Feher, Laura

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Year Published: 2020

Using carbon isotope ratios to verify predictions of a model simulating the interaction between coastal plant communities and their effect on ground water salinity

As sea level rises in low-lying coastal islands, salt-tolerant (halophytic) coastal vegetation communities may be able to migrate inland, replacing the freshwater vegetation that is unable to tolerate salt stress. The pace of such shifts may be accelerated by a self-reinforcing feedback between the halophytic vegetation and salinity, as well as by...

Subedi, Suresh C.; Sternberg, Leonel; DeAngelis, Donald L.; Ross, Michael S.; Ogarcak, Danielle

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Year Published: 2020

A comprehensive approach uncovers hidden diversity in freshwater mussels (Bivalvia: Unionidae) with the description of a novel species

Major geological processes have shaped biogeographical patterns of riverine biota. The Edwards Plateau of central Texas, USA, exhibits unique aquatic communities and endemism, including several species of freshwater mussels. Lampsilis bracteata (Gould, 1855) is endemic to the Edwards Plateau region; however, its phylogenetic relationship...

Inoue, Kentaro; Harris, John L.; Robertson, Clint; Johnson, Nathan; Randklev, Charles R.

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Year Published: 2020

Establishing genome sizes of focal fishery and aquaculture species along Baja California, Mexico

Genome size—the total haploid content of nuclear DNA— is constant in all cells in individuals within a species, but differs among species. Consequently, the genome size is a quantifiable genetic signature that not only characterizes a species, but it can reflect chromatin modifications, which play fundamental roles in most biological processes...

del Mar Ochoa-Saloma, Constanza; Jenkins, Jill A.; Segovia, Manuel A.; Del Rio-Portilla, Miguel A.; Paniagua-Chavez, Carmen G.

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Year Published: 2019

Quantifying changes to infaunal communities associated with several deep-sea coral habitats in the Gulf of Mexico and their potential recovery from the DWH oil spill

Extensive information is available about infaunal soft-sediment communities in the Gulf of Mexico (Gulf) (Pequegnat et al. 1990, Rowe and Kennicutt II 2009, Wei et al. 2010), particularly from the large-scale sampling effort of the Deep Gulf of Mexico Benthos (DGOMB) project in the early 2000s (Rowe and Kennicutt II 2009). Infaunal soft-sediment...

Bourque, Jill R.; Demopoulos, Amanda W.J.