Diversification of deermice (Rodentia: genus Peromyscus) at their north-western range limit: genetic consequences of refugial and island isolation
Dates
Year
2017
Citation
Sawyer, Yadéeh E., Flamme, Melanie J., Jung, Thomas S., MacDonald, Stephen O., and Cook, Joseph A., 2017, Diversification of deermice (Rodentia: genus Peromyscus) at their north-western range limit: genetic consequences of refugial and island isolation: Journal of Biogeography, v. 44, no. 7, p. 1572-1585.
Summary
Aim We surveyed the genetic variability of deermice (genus Peromyscus) at the north-western edge of their range to test for occupancy in multiple, hypothesized ice-free regions during the late Pleistocene and explore post-glacial dynamics. Location North-western North America. Methods We used sequences from four independent nuclear and mitochondrial loci from 341 specimens of Peromyscus maniculatus, Peromyscus keeni and Peromyscus sp. (Yukon) to assess species limits, population structure, and demographical change as a result of historical climate change, using a Bayesian approach. Species distribution models were built in MaxEnt to explore the niche overlap amongst genetically distinct species. Results Divergence amongst three lineages [...]
Summary
Aim We surveyed the genetic variability of deermice (genus Peromyscus) at the north-western edge of their range to test for occupancy in multiple, hypothesized ice-free regions during the late Pleistocene and explore post-glacial dynamics. Location North-western North America. Methods We used sequences from four independent nuclear and mitochondrial loci from 341 specimens of Peromyscus maniculatus, Peromyscus keeni and Peromyscus sp. (Yukon) to assess species limits, population structure, and demographical change as a result of historical climate change, using a Bayesian approach. Species distribution models were built in MaxEnt to explore the niche overlap amongst genetically distinct species. Results Divergence amongst three lineages began before the last interglacial, and each shows signs of post-glacial expansion. Multilocus species trees strongly support P. keeni and Peromyscus sp. (Yukon) as independent from P. maniculatus. Substantial substructure was observed for P. keeni across the fragmented Alexander Archipelago. Northern lineages or clades ( Peromyscus sp. and P. keeni) differed in potential ecological distributions. Main conclusions At the extreme north-western range of deermice in North America, three distinct lineages persist reflecting divergence in at least three ice-free regions [Beringia, Coastal (near Southeast Alaska) and Southern Continental] throughout the latest Pleistocene glacial cycles. Although spatially proximate in Yukon, no locations were identified where these lineages are in contact. Further, west along the Pacific Coast, P. keeni is widespread across the complex landscape of Southeast Alaska, yet there is limited contemporary gene flow amongst island populations, a finding consistent with the barriers produced by rising sea levels at the end of the Last Glacial Maximum. [ABSTRACT FROM AUTHOR] Copyright of Journal of Biogeography is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Sawyer, Yadéeh E. 1; Flamme, Melanie J. 2; Jung, Thomas S. 3; MacDonald, Stephen O. 1; Cook, Joseph A. 1; Affiliations: 1: Department of Biology and Museum of Southwestern Biology, University of New Mexico; 2: National Park Service, Yukon -Charley Rivers National Preserve and Gates of the Arctic National Park and Preserve; 3: Yukon Department of Environment; Issue Info: Jul2017, Vol. 44 Issue 7, p1572; Thesaurus Term: Peromyscus; Thesaurus Term: Rodents; Thesaurus Term: Winter; Thesaurus Term: Cricetidae; Subject Term: Seasons; Author-Supplied Keyword: endemism; Author-Supplied Keyword: glacial refugia; Author-Supplied Keyword: phylogeography; Author-Supplied Keyword: Southeast Alaska; Author-Supplied Keyword: Yukon; NAICS/Industry Codes: 112999 All other miscellaneous animal production; Number of Pages: 14p; Illustrations: 3 Charts, 2 Graphs, 2 Maps; Document Type: Article
