Phylogeography of a widespread Palaearctic forest bird species: The White‐backed Woodpecker (Aves, Picidae),Zoologica Scripta

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Phylogeography of a widespread Palaearctic forest bird species: The White‐backed Woodpecker (Aves, Picidae)
Zoologica Scripta ( IF 2.5 ) Pub Date : 2020-11-24 , DOI: 10.1111/zsc.12466
Jean‐Marc Pons ₁ , David Campión ₂ , Giorgio Chiozzi ₃ , Antonia Ettwein ₄ , Jean‐Louis Grangé ₅ , Łukasz Kajtoch ₆ , Tomasz D. Mazgajski ₇ , Marko Rakovic ₈ , Hans Winkler ₉ , Jérôme Fuchs ₁

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We use multilocus molecular data and species distribution modelling to investigate the phylogenetics and the phylogeography of the White‐backed Woodpecker (Dendrocopos leucotos), a bird species widely distributed over the entire Palaearctic. Our phylogenetic results reveal three well‐supported clades within D. leucotos: the Chinese endemic subspecies (tangi, insularis), the northerly distributed subspecies (leucotos, uralensis) and the four poorly genetically differentiated Japanese subspecies (subcirris, stejnegeri, namiyei, owstoni), and the south‐western Palaearctic lilfordi subspecies. According to our results, the Amami Woodpecker, endemic to Amami Oshima Island (Ryukyu archipelago, Japan) sometimes treated as full species Dendrocopos owstoni, does not deserve a species‐level status. Based on the mitochondrial phylogeographic results, the Japanese archipelago was recently colonized only once by D. leucotos from eastern Eurasia. Our results suggest a split between the leucotos and lilfordi lineages that dates back to mid‐Pleistocene (around 0.6 Mya) with likely no gene flow between these two subspecies since then. Our results thus do not support a phylogeographic pattern in which Central Europe and Northern Europe were recolonized from one or several southern glacial refugia where lilfordi populations persisted through several Pleistocene glacial periods. Spatial variation in mitochondrial diversity across leucotos/uralensis populations and niche ecological modelling suggest a possible eastward population expansion from a unique glacial refugium likely located in Central Europe. Molecular species delimitation methods, gene flow analyses and differences in adult and juvenile plumage indicate that the lilfordi subspecies may warrant to be ranked as a valid phylogenetic species. Further studies are nevertheless needed in the Balkans, where leucotos and lilfordi came recently into contact to measure the effectiveness of reproductive barriers and gene flow.

更新日期：2020-11-24

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