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Pronounced phylogeographic structure on a small spatial scale: Geomorphological evolution and lineage history in the salamander ring species Ensatina eschscholtzii in central coastal California

Kuchta, Shawn LU ; Parks, Duncan S. and Wake, David B. (2009) In Molecular Phylogenetics and Evolution 50(2). p.240-255
Abstract
The salamander Ensatina eschscholtzii is a classic example of a ring species, and has an intricate biogeographic history. Within a part of the ring distribution, earlier work using allozymes disclosed high levels of genetic structure in central coastal California, where the subspecies oregonensis, xanthoptica, and eschscholtzii meet. We used mitochondrial cytochrome b sequences to further examine patterns of divergence in this area, including data from 155 localities (309 individuals). Our focus is on the documentation of population-level haplotype lineages. We show that oregonensis is represented by two unrelated, phenotypically similar clades, both of which possess substantial substructure of their own. The subspecies xanthoptica... (More)
The salamander Ensatina eschscholtzii is a classic example of a ring species, and has an intricate biogeographic history. Within a part of the ring distribution, earlier work using allozymes disclosed high levels of genetic structure in central coastal California, where the subspecies oregonensis, xanthoptica, and eschscholtzii meet. We used mitochondrial cytochrome b sequences to further examine patterns of divergence in this area, including data from 155 localities (309 individuals). Our focus is on the documentation of population-level haplotype lineages. We show that oregonensis is represented by two unrelated, phenotypically similar clades, both of which possess substantial substructure of their own. The subspecies xanthoptica includes two lineages that differ in phenotype, one of which has colonized the foothills of the Sierra Nevada. The subspecies eschscholtzii occurs mainly to the south, but some populations from a northern lineage extend into the Monterey Bay region, where they approach xanthoptica geographically. In sum, populations in the central coastal California region form a distributional patchwork, including three subspecies, three clades (which differ from the three subspecies), and ten haplotype lineages. We conclude that such striking levels of phylogeographic structure reflect interspersed episodes of spatial fragmentation, in part driven by the complex geomorphological evolution of the California Coast Range system. (C) 2008 Elsevier Inc. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Phylogeography, Mitochondrial DNA, Mismatch distribution, distance, Isolation by, Haplotype network, Biogeography, Ensatina eschscholtzii, Ring species, Secondary contact
in
Molecular Phylogenetics and Evolution
volume
50
issue
2
pages
240 - 255
publisher
Elsevier
external identifiers
  • wos:000263158100003
  • scopus:58049176342
ISSN
1095-9513
DOI
10.1016/j.ympev.2008.10.019
language
English
LU publication?
yes
id
77607111-f311-46ff-9fab-815e2f1971a3 (old id 1311369)
date added to LUP
2009-03-17 10:33:55
date last changed
2017-11-19 03:27:38
@article{77607111-f311-46ff-9fab-815e2f1971a3,
  abstract     = {The salamander Ensatina eschscholtzii is a classic example of a ring species, and has an intricate biogeographic history. Within a part of the ring distribution, earlier work using allozymes disclosed high levels of genetic structure in central coastal California, where the subspecies oregonensis, xanthoptica, and eschscholtzii meet. We used mitochondrial cytochrome b sequences to further examine patterns of divergence in this area, including data from 155 localities (309 individuals). Our focus is on the documentation of population-level haplotype lineages. We show that oregonensis is represented by two unrelated, phenotypically similar clades, both of which possess substantial substructure of their own. The subspecies xanthoptica includes two lineages that differ in phenotype, one of which has colonized the foothills of the Sierra Nevada. The subspecies eschscholtzii occurs mainly to the south, but some populations from a northern lineage extend into the Monterey Bay region, where they approach xanthoptica geographically. In sum, populations in the central coastal California region form a distributional patchwork, including three subspecies, three clades (which differ from the three subspecies), and ten haplotype lineages. We conclude that such striking levels of phylogeographic structure reflect interspersed episodes of spatial fragmentation, in part driven by the complex geomorphological evolution of the California Coast Range system. (C) 2008 Elsevier Inc. All rights reserved.},
  author       = {Kuchta, Shawn and Parks, Duncan S. and Wake, David B.},
  issn         = {1095-9513},
  keyword      = {Phylogeography,Mitochondrial DNA,Mismatch distribution,distance,Isolation by,Haplotype network,Biogeography,Ensatina eschscholtzii,Ring species,Secondary contact},
  language     = {eng},
  number       = {2},
  pages        = {240--255},
  publisher    = {Elsevier},
  series       = {Molecular Phylogenetics and Evolution},
  title        = {Pronounced phylogeographic structure on a small spatial scale: Geomorphological evolution and lineage history in the salamander ring species Ensatina eschscholtzii in central coastal California},
  url          = {http://dx.doi.org/10.1016/j.ympev.2008.10.019},
  volume       = {50},
  year         = {2009},
}