Final Environmental Impact Statement: Edwards Aquifer Recovery Implementation Program Habitat Conservation Plan

Citation

Material Information

Title:
Final Environmental Impact Statement: Edwards Aquifer Recovery Implementation Program Habitat Conservation Plan
Series Title:
Herpetological Conservation and Biology
Creator:
Bendik, Nathan F.
Sissel, Blake N.
Fields, Jacqueline R.
O'Donnell, Lisa J.O.
Sanders, Mark S.
Publication Date:
Language:
English

Subjects

Subjects / Keywords:
Edwards Aquifer ( local )
Endangered Species ( local )
Habitat Loss ( local )
Land-Use Change ( local )
Plethodontidae ( local )
Population Ecology ( local )
Genre:
serial ( sobekcm )

Notes

Abstract:
Urbanization causes havoc to native ecosystems, resulting in population declines or extirpation of sensitive taxa. This can be devastating to narrow-range endemics whose distributions overlap or are enveloped by urban development. Jollyville Plateau Salamanders (Eurycea tonkawae) are aquatic neotenes restricted to karst-associated waters in a small, highly urbanized area of central Texas. Eurycea tonkawae was recently listed as threatened under the U.S. Endangered Species Act due to threats from urbanization, although the published literature on their population status is limited to a single, short-term study. Here, we attempt to remedy this dearth of knowledge by summarizing population survey data from sites that span the breadth of E. tonkawae’s range. We analyzed count data using Bayesian inference and generalized linear models, first to determine trends in abundance at eight sites from 1996–2011. Secondly, we examined differences in salamander density at these and an additional nine sites (n = 17) among urbanized and nonurbanized catchments from 2009–2012. Study sites occurred in catchments that ranged from undeveloped to completely built-out, from no-change in development to > 20% increases in development. Accounting for climatic variation, we found that counts of E. tonkawae declined in areas that had the largest increases in residential development (a metric of urbanization) over a 15-y period. Additionally, densities of E. tonkawae were negatively correlated with residential development across their range. We discuss several possible mechanisms responsible for declines of E. tonkawae and highlight likely causes and potential areas of future research to aid in conservation efforts for this and other central Texas Eurycea salamanders.
Original Version:
Herpetological Conservation and Biology, Vol. 9, no. 1 (2014-06-13).

Record Information

Source Institution:
University of South Florida Library
Holding Location:
University of South Florida
Rights Management:
This object is protected by copyright, and is made available here for research and educational purposes. Permission to reuse, publish, or reproduce the object beyond the bounds of Fair Use or other exemptions to copyright law must be obtained from the copyright holder.

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University of South Florida
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