Persistence and diversification of the Holarctic shrew, Sorex tundrensis (Family Soricidae), in response to climate change

Molecular Ecology
By: , and 

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Abstract

Environmental processes govern demography, species movements, community turnover and diversification and yet in many respects these dynamics are still poorly understood at high latitudes. We investigate the combined effects of climate change and geography through time for a widespread Holarctic shrew, Sorex tundrensis. We include a comprehensive suite of closely related outgroup taxa and three independent loci to explore phylogeographic structure and historical demography. We then explore the implications of these findings for other members of boreal communities. The tundra shrew and its sister species, the Tien Shan shrew (Sorex asper), exhibit strong geographic population structure across Siberia and into Beringia illustrating local centres of endemism that correspond to Late Pleistocene refugia. Ecological niche predictions for both current and historical distributions indicate a model of persistence through time despite dramatic climate change. Species tree estimation under a coalescent process suggests that isolation between populations has been maintained across timeframes deeper than the periodicity of Pleistocene glacial cycling. That some species such as the tundra shrew have a history of persistence largely independent of changing climate, whereas other boreal species shifted their ranges in response to climate change, highlights the dynamic processes of community assembly at high latitudes.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Persistence and diversification of the Holarctic shrew, Sorex tundrensis (Family Soricidae), in response to climate change
Series title Molecular Ecology
DOI 10.1111/j.1365-294X.2011.05226.x
Volume 20
Issue 20
Year Published 2011
Language English
Publisher Wiley
Contributing office(s) Alaska Science Center Biology WTEB
Description 25 p.
First page 4346
Last page 4370
Online Only (Y/N) N
Additional Online Files (Y/N) N