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- Title
A MOLECULAR PERSPECTIVE ON THE HISTORICAL BIOGEOGRAPHY OF THE NORTHERN HIGH LATITUDES.
- Authors
Waltari, Eric; Demboski, John R.; Klein, David R.; Cook, Joseph A.; Rickart, Eric A.
- Abstract
Phylogeographic analyses of arctic organisms provide spatial and temporal frameworks for interpreting the role of climate change on biotic diversity in high-latitude ecosystems. Phylogenetic analyses based on 673 base pairs of the mitochondrial control region from 95 arctic hares (Lepus arcticus, L. othus, L. timidus) and 2 other Lepus species identified 6 strongly or moderately supported clades. The 3 arctic hare species are closely related, but phylogenetic discontinuities were found at the eastern and western boundaries of Beringia, the latter not previously identified as a species boundary. The locations of these discontinuities are congruent with previously described genetic breaks in Arctic plants, birds, and small mammals. Similarly, the finding of a Beringian clade corroborates previous studies identifying Beringia as a refugium. A coalescent view of a population on Seward Peninsula, Alaska (eastern Beringia), did not, however, provide a genetic signature of population expansion. In contrast, a Greenland population did show a signal of expansion.
- Subjects
HARES; LEPUS; PHYLOGEOGRAPHY; BIOTIC communities; CLIMATE change
- Publication
Journal of Mammalogy, 2004, Vol 85, Issue 4, p591
- ISSN
0022-2372
- Publication type
Article
- DOI
10.1644/BER-101