Landscape and climatic variations shaped secondary contacts amid barn owls of the Western Palearctic.

Details

Serval ID
serval:BIB_4289DA16E19E
Type
Article: article from journal or magazin.
Publication sub-type
Review (review): journal as complete as possible of one specific subject, written based on exhaustive analyses from published work.
Collection
Publications
Institution
Title
Landscape and climatic variations shaped secondary contacts amid barn owls of the Western Palearctic.
Journal
Molecular biology and evolution
Author(s)
Cumer T., Machado A.P., Dumont G., Bontzorlos V., Ceccherelli R., Charter M., Dichmann K., Kassinis N., Lourenço R., Manzia F., Martens H.D., Prévost L., Rakovic M., Roque I., Siverio F., Roulin A., Goudet J.
ISSN
1537-1719 (Electronic)
ISSN-L
0737-4038
Publication state
In Press
Peer-reviewed
Oui
Language
english
Notes
Publication types: Journal Article
Publication Status: aheadofprint
Abstract
The combined actions of climatic variations and landscape barriers shape the history of natural populations. When organisms follow their shifting niches, obstacles in the landscape can lead to the splitting of populations, on which evolution will then act independently. When two such populations are reunited, secondary contact occurs in a broad range of admixture patterns, from narrow hybrid zones to the complete dissolution of lineages. A previous study suggested that barn owls colonized the Western Palearctic after the last glaciation in a ring-like fashion around the Mediterranean Sea, and conjectured an admixture zone in the Balkans. Here, we take advantage of whole-genome sequences of 94 individuals across the Western Palearctic to reveal the complex history of the species in the region using observational and modeling approaches. Even though our results confirm that two distinct lineages colonized the region, one in Europe and one in the Levant, they suggest that it predates the last glaciation and identify a secondary contact zone between the two in Anatolia. We also show that barn owls re-colonized Europe after the glaciation from two distinct glacial refugia: a previously identified western one in Iberia and a new eastern one in Italy. Both glacial lineages now communicate via eastern Europe, in a wide and permeable contact zone. This complex history of populations enlightens the taxonomy of Tyto alba in the region, highlights the key role played by mountain ranges and large water bodies as barriers and illustrates the power of population genomics in uncovering intricate demographic patterns.
Keywords
Demographic modeling, Glacial refugium, Haplotypes, Population genomics, Postglacial recolonization, Whole-genome resequencing
Pubmed
Open Access
Yes
Funding(s)
Swiss National Science Foundation / Projects
Create date
07/12/2021 15:33
Last modification date
21/12/2021 6:34
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