Eastward Ho: phylogeographical perspectives on colonization of hosts and parasites across the Beringian nexus
Identifieur interne : 000791 ( Main/Exploration ); précédent : 000790; suivant : 000792Eastward Ho: phylogeographical perspectives on colonization of hosts and parasites across the Beringian nexus
Auteurs : Eric Waltari [États-Unis] ; Eric P. Hoberg [États-Unis] ; Enrique P. Lessa [Uruguay] ; Joseph A. Cook [États-Unis]Source :
- Journal of Biogeography [ 0305-0270 ] ; 2007-04.
Descripteurs français
- Wicri :
- topic : Arctique.
English descriptors
- KwdEn :
Abstract
The response of Arctic organisms and their parasites to dramatic fluctuations in climate during the Pleistocene has direct implications for predicting the impact of current climate change in the North. An increasing number of phylogeographical studies in the Arctic have laid a framework for testing hypotheses concerning the impact of shifting environmental conditions on transcontinental movement. We review 35 phylogeographical studies of trans‐Beringian terrestrial and freshwater taxa, both hosts and parasites, to identify generalized patterns regarding the number, direction and timing of trans‐continental colonizations. We found that colonization across Beringia was primarily from Asia to North America, with many events occurring in the Quaternary period. The 35 molecular studies of trans‐Beringian organisms we examined focused primarily on the role of glacial cycles and refugia in promoting diversification. We address the value of establishing testable hypotheses related to high‐latitude biogeography. We then discuss future prospects in Beringia related to coalescent theory, palaeoecology, ancient DNA and synthetic studies of arctic host–parasite assemblages highlighting their cryptic diversity, biogeography and response to climate variation.
Url:
DOI: 10.1111/j.1365-2699.2007.01705.x
Affiliations:
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An increasing number of phylogeographical studies in the Arctic have laid a framework for testing hypotheses concerning the impact of shifting environmental conditions on transcontinental movement. We review 35 phylogeographical studies of trans‐Beringian terrestrial and freshwater taxa, both hosts and parasites, to identify generalized patterns regarding the number, direction and timing of trans‐continental colonizations. We found that colonization across Beringia was primarily from Asia to North America, with many events occurring in the Quaternary period. The 35 molecular studies of trans‐Beringian organisms we examined focused primarily on the role of glacial cycles and refugia in promoting diversification. We address the value of establishing testable hypotheses related to high‐latitude biogeography. 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Hoberg</name></country><country name="Uruguay"><noRegion><name sortKey="Lessa, Enrique P" sort="Lessa, Enrique P" uniqKey="Lessa E" first="Enrique P." last="Lessa">Enrique P. Lessa</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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