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Phylogeography of lemmings (Lemmus): no evidence for postglacial colonization of Arctic from the Beringian refugium

Fedorov, VB; Goropashnaya, AV; Jaarola, Maarit LU and Cook, JA (2003) In Molecular Ecology 12(3). p.725-731
Abstract
Beringia is considered as an important glacial refugium that served as the main source for colonization of formerly glaciated Arctic regions. To obtain high resolution views of Arctic refugial history, we examined mitochondrial cytochrome b phylogeography in the northern genus of rodents, Lemmus ( true lemmings), sampled across its circumpolar distribution. Strong phylogeographical structure suggests vicariant separation over several glacial-interglacial periods and does not provide evidence supporting the importance of Beringia for extensive colonization of formerly glaciated regions. Rather than a source of postglacial colonization, Beringia represents an area of intraspecific endemism previously undetected by biogeographical analysis.... (More)
Beringia is considered as an important glacial refugium that served as the main source for colonization of formerly glaciated Arctic regions. To obtain high resolution views of Arctic refugial history, we examined mitochondrial cytochrome b phylogeography in the northern genus of rodents, Lemmus ( true lemmings), sampled across its circumpolar distribution. Strong phylogeographical structure suggests vicariant separation over several glacial-interglacial periods and does not provide evidence supporting the importance of Beringia for extensive colonization of formerly glaciated regions. Rather than a source of postglacial colonization, Beringia represents an area of intraspecific endemism previously undetected by biogeographical analysis. Existing phylogeographical structure suggests that vicariant separation by glacial barriers was an important factor generating genetic divergence and, thus, increasing genetic diversity in lemmings on continental and circumpolar scales. However, there is little evidence for the direct effect of the last glaciation on the level of genetic variation and allele genealogy in lemmings on a regional geographical scale. This finding implies that the population genetic models of postglacial colonization suggested for temperate taxa might have limited applicability for Arctic species. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
mitochondrial DNA, genetic variation, cytochrome b gene, Alaska, biogeography
in
Molecular Ecology
volume
12
issue
3
pages
725 - 731
publisher
Wiley-Blackwell
external identifiers
  • wos:000181230900014
  • pmid:12675827
  • scopus:0037350956
ISSN
0962-1083
DOI
10.1046/j.1365-294X.2003.01776.x
language
English
LU publication?
yes
id
a13e74ea-9437-4737-bfde-f9a8c6807e9f (old id 317483)
date added to LUP
2007-09-03 07:45:32
date last changed
2018-01-07 05:05:38
@article{a13e74ea-9437-4737-bfde-f9a8c6807e9f,
  abstract     = {Beringia is considered as an important glacial refugium that served as the main source for colonization of formerly glaciated Arctic regions. To obtain high resolution views of Arctic refugial history, we examined mitochondrial cytochrome b phylogeography in the northern genus of rodents, Lemmus ( true lemmings), sampled across its circumpolar distribution. Strong phylogeographical structure suggests vicariant separation over several glacial-interglacial periods and does not provide evidence supporting the importance of Beringia for extensive colonization of formerly glaciated regions. Rather than a source of postglacial colonization, Beringia represents an area of intraspecific endemism previously undetected by biogeographical analysis. Existing phylogeographical structure suggests that vicariant separation by glacial barriers was an important factor generating genetic divergence and, thus, increasing genetic diversity in lemmings on continental and circumpolar scales. However, there is little evidence for the direct effect of the last glaciation on the level of genetic variation and allele genealogy in lemmings on a regional geographical scale. This finding implies that the population genetic models of postglacial colonization suggested for temperate taxa might have limited applicability for Arctic species.},
  author       = {Fedorov, VB and Goropashnaya, AV and Jaarola, Maarit and Cook, JA},
  issn         = {0962-1083},
  keyword      = {mitochondrial DNA,genetic variation,cytochrome b gene,Alaska,biogeography},
  language     = {eng},
  number       = {3},
  pages        = {725--731},
  publisher    = {Wiley-Blackwell},
  series       = {Molecular Ecology},
  title        = {Phylogeography of lemmings (Lemmus): no evidence for postglacial colonization of Arctic from the Beringian refugium},
  url          = {http://dx.doi.org/10.1046/j.1365-294X.2003.01776.x},
  volume       = {12},
  year         = {2003},
}