Cryptic diversity among Western Palearctic tree frogs: Postglacial range expansion, range limits, and secondary contacts of three European tree frog lineages (Hyla arborea group)

[Display omitted] ► Uncovering cryptic biodiversity of threatened European amphibians (Hyla arborea group). ► Divergence times, diversity, distributions for three recently recognized tree frog lineages. ► Range borders, secondary contact zones, signatures of a postglacial range expansion. ► Data sup...

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Bibliographic Details
Published in:Molecular phylogenetics and evolution 2012-10, Vol.65 (1), p.1-9
Main Authors: Stöck, Matthias, Dufresnes, Christophe, Litvinchuk, Spartak N., Lymberakis, Petros, Biollay, Sébastien, Berroneau, Matthieu, Borzée, Amaël, Ghali, Karim, Ogielska, Maria, Perrin, Nicolas
Format: Article
Language:English
Subjects:
Animals
Anura - classification
Anura - genetics
Bayes Theorem
Biodiversity
Biological Evolution
Cell Nucleus - genetics
Cladding
Contact zone
Divergence
Divergence time
Diversity
DNA, Mitochondrial - genetics
Europe
Evolution
Frogs
Genetic Variation
hybridization
Hyla
latitude
Likelihood Functions
mitochondrial DNA
Palaearctic region
Phylogeny
Phylogeography
Range expansion
Recognition
rivers
Sequence Analysis, DNA
Signatures
Trees
Turkey
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Summary:[Display omitted] ► Uncovering cryptic biodiversity of threatened European amphibians (Hyla arborea group). ► Divergence times, diversity, distributions for three recently recognized tree frog lineages. ► Range borders, secondary contact zones, signatures of a postglacial range expansion. ► Data support conservation by fine-tuning measures to lineage-specific Quaternary refugia. ► Suture zones as natural arenas to generate biodiversity and study speciation. We characterize divergence times, intraspecific diversity and distributions for recently recognized lineages within the Hyla arborea species group, based on mitochondrial and nuclear sequences from 160 localities spanning its whole distribution. Lineages of H. arborea, H. orientalis, H. molleri have at least Pliocene age, supporting species level divergence. The genetically uniform Iberian H. molleri, although largely isolated by the Pyrenees, is parapatric to H. arborea, with evidence for successful hybridization in a small Aquitanian corridor (southwestern France), where the distribution also overlaps with H. meridionalis. The genetically uniform H. arborea, spread from Crete to Brittany, exhibits molecular signatures of a postglacial range expansion. It meets different mtDNA clades of H. orientalis in NE-Greece, along the Carpathians, and in Poland along the Vistula River (there including hybridization). The East-European H. orientalis is strongly structured genetically. Five geographic mitochondrial clades are recognized, with a molecular signature of postglacial range expansions for the clade that reached the most northern latitudes. Hybridization with H. savignyi is suggested in southwestern Turkey. Thus, cryptic diversity in these Pliocene Hyla lineages covers three extremes: a genetically poor, quasi-Iberian endemic (H. molleri), a more uniform species distributed from the Balkans to Western Europe (H. arborea), and a well-structured Asia Minor-Eastern European species (H. orientalis).
ISSN:1055-7903
1095-9513
DOI:10.1016/j.ympev.2012.05.014