Pervasive gene flow across critical habitat for four narrowly endemic, sympatric taxa

Citation

Material Information

Title:
Pervasive gene flow across critical habitat for four narrowly endemic, sympatric taxa
Series Title:
Freshwater Biology
Creator:
Lucas, Lauren K.
Gompert, Zachariah
Gibson, J. Randy
Bell, Katherine L.
Buerkle, C. Alex
Nice, Chris C.
Publisher:
John Wiley & Sons Ltd
Publication Date:
Language:
English

Subjects

Subjects / Keywords:
Approximate Bayesian Computation ( local )
Aquatic Invertebrate ( local )
Endangered Species ( local )
Genotyping By Sequencing ( local )
Neotenic Salamander ( local )
Genre:
serial ( sobekcm )

Notes

Abstract:
1. We studied genetic variation in four endangered animal taxa in the largest freshwater spring complex in the southwestern U.S.A., Comal Springs (TX): Eurycea salamanders, Heterelmis riffle beetles, Stygobromus amphipods and Stygoparnus dryopid beetles. They inhabit a spring complex with nearly stable conditions, which is threatened by climate change and aquifer withdrawals. The four taxa vary in their habitat affinities and body sizes. 2. We used genotyping‐by‐sequencing to obtain hundreds to thousands of genetic markers to accurately infer the demographic history of the taxa. We used approximate Bayesian computation to test models of gene flow and compare the results among taxa. We also looked for evidence that would suggest local adaptation within the spring complex. 3. An island model (equal gene flow among all subpopulations) was the most probable of the five models tested, and all four taxa had high migration rate estimates. 4. Small numbers of single nucleotide polymorphisms (SNPs) in each taxon tested were associated with environmental conditions and provide some evidence for potential local adaptation to slightly variable conditions across habitat patches within Comal Springs. 5. We discuss how the results of this study can add to the habitat conservation plan for Comal Springs. If part of the spring system dries, migrants may recolonise from elsewhere within the spring complex. However, genetic variants affecting survival in particular habitat patches could be lost during such droughts.
Original Version:
Freshwater Biology, Vol. 61, no. 6 (2016-04-06).

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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