Journal Article
Hydrologic and geologic history of the Ozark Plateau drive phylogenomic patterns in a cave-obligate salamander
Phillips, J.G., Fenolio, D.B., Emel, S.L. and Bonett, R.M.
Record Number:
5895
Year:
2017
Journal:
Journal of Biogeography
Pages:
2463-2474
Volume:
44
Abstract:
Aim: Habitat specialization can constrain patterns of dispersal and drive allopatric
speciation in organisms with limited dispersal ability. Herein, we tested biogeographic
patterns and dispersal in a salamander with surface-dwelling larvae and obligate
cave-dwelling adults.
Location: Ozark Plateau, eastern North America.
Methods: A population-level phylogeny of grotto salamanders (Eurycea spelaea complex)
was reconstructed using mitochondrial (mtDNA) and multi-locus nuclear DNA
(nucDNA), primarily derived from anchored hybrid enrichment (AHE). We tested
patterns of molecular variance among populations and associations between genetic
distance and geographic features.
Results: Divergence time estimates suggest rapid formation of three major lineages
in the Middle Miocene. Contemporary gene flow among divergent lineages appears
negligible, and mtDNA suggests that most populations are isolated. There is a significant
association between phylogenetic distance and palaeodrainages, contemporary
drainages and sub-plateaus of the Ozarks, as all features explain a proportion of
genetic variation. However, the greatest proportion of genetic variation is explained
by the combined effects of palaeodrainages and sub-plateaus.
Main conclusions: The geologic and hydrologic history of the Ozark Plateau has
influenced lineage diversification in the grotto salamander, leading to genetic isolation
among populations. Limited gene flow and strong phylogeographic structure in
this complex may result from the restriction of highly specialized adults to caves.
KEYWORDS
amphibians, anchored hybrid enrichment, conservation genetics, cryptic speciation, db-RDA,
dispersal, interior highlands, phylogeography, SAMOVA, subterranean biology
Times Cited:
1
Relevent Species:
Related Records:
Potter, F.E. Jr. and Sweet, S.S. (1981)
Generic boundaries in Texas cave salamanders, and a redescription of Typhlomolge
robusta (Amphibia: Plethodontidae)
Hillis, D.M., Chamberlain, D.E., Wilcox, T.P. and Chippindale, P.T. (2001)A new species of subterranean blind salamander (Plethodontidae: Hemidactyliini:
Eurycea: Typhlomolge) from Austin, Texas, and a systematic revision of central Texas
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Fenolio, D.B., Graening, G.O., Collier, B.A. et al. (2006)Coprophagy in a caveadapted salamander; the importance of bat guano examined through
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Lucas, L.K., Gompert, Z., Ott, J.R. and Nice, C.C. (2009)Geographic and genetic isolation in spring-associated Eurycea salamanders endemic to the Edwards Plateau region of Texas
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