The phylogeography and post-glacial expansion of the boreal chickadee (Poecile hudsonicus)
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Date
2011
Authors
Lait, Linda Amy
University of Lethbridge. Faculty of Arts and Science
Journal Title
Journal ISSN
Volume Title
Publisher
Lethbridge, Alta. : University of Lethbridge, Dept. of Biological Sciences, 2011
Abstract
Using a combination of both mitochondrial DNA and microsatellites, as well as
spatio-geographic modelling, this study examines how the most recent glaciations may
have affected the population genetic structure of the boreal chickadee (Poecile
hudsonicus), a small resident passerine of the North American boreal forests. The
mtDNA data support a separation between eastern and western populations, with central
populations containing a mixture of haplotypes from both the east and west. Estimated
dates place the divergence during the Wisconsin (56.2-129.7 kya). Microsatellite analyses
support the separation of Newfoundland from all mainland populations, indicating that
the eastern straits are restricting gene flow. No evidence for reduced gene flow was found
for the Rocky Mountains. The results suggest the use of multiple glacial refugia, one in
Beringia and one in the east, followed by stepping-stone colonisation and secondary
admixture.
Description
xii, 158 leaves : ill. (some col.), maps (some col.) ; 29 cm
Keywords
Boreal chickadee -- Geographical distribution , Boreal chickadee -- Geographical distribution -- Climatic factors , Boreal chickadee -- Genetics , Phylogeography , Isolating mechanisms , Dissertations, Academic