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

Stöck, Matthias; Dufresnes, Christophe; Litvinchuk, Spartak N.; Lymberakis, Petros; Biollay, Sébastien; Berroneau, Matthieu; Borzée, Amaël; Ghali, Karim; Ogielska, Maria; Perrin, Nicolas

doi:10.1016/j.ympev.2012.05.014

Cited by 95 publications

(127 citation statements)

References 40 publications

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“…A Widespread 'Fountain of Youth' The Eastern tree frog (H. orientalis) is a sister species to the geographically disjunctive Iberian tree frog ( H. molleri ;Stöck et al [2008Stöck et al [ , 2012), from which it diverged about 3.7-4.6 Mya (3.7 (2.6-5.5) Mya based on mtDNA; 4.6 (2.4-6.9) Mya based on nuDNA, Stöck et al [2012]). Both species not only share a common ancestor with H. arborea and H. intermedia that lived between 5.4-7.1 Mya [Stöck et al, 2011b], but also inherited the same pair of homomorphic sex chromosomes.…”

Section: Discussionmentioning

confidence: 99%

Maintenance of Ancestral Sex Chromosomes in Palearctic Tree Frogs: Direct Evidence from Hyla orientalis

Stöck

Savary²,

Zaborowska³

et al. 2013

Sex Dev

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Contrasting with the situation found in birds and mammals, sex chromosomes are generally homomorphic in poikilothermic vertebrates. This homomorphy was recently shown to result from occasional X-Y recombinations (not from turnovers) in several European species of tree frogs (Hyla arborea, H. intermedia and H. molleri). Because of recombination, however, alleles at sex-linked loci were rarely diagnostic at the population level; support for sex linkage had to rely on multilocus associations, combined with occasional sex differences in allelic frequencies. Here, we use direct evidence, obtained from anatomical and histological analyses of offspring with known pedigrees, to show that the Eastern tree frog (H. orientalis) shares the same pair of sex chromosomes, with identical patterns of male heterogamety and complete absence of X-Y recombination in males. Conservation of an ancestral pair of sex chromosomes, regularly rejuvenated via occasional X-Y recombination, seems thus a widespread pattern among Hyla species. Sibship analyses also identified discrepancies between genotypic and phenotypic sex among offspring, associated with abnormal gonadal development, suggesting a role for sexually antagonistic genes on the sex chromosomes.

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Section: Discussionmentioning

confidence: 99%

Maintenance of Ancestral Sex Chromosomes in Palearctic Tree Frogs: Direct Evidence from Hyla orientalis

Stöck

Savary²,

Zaborowska³

et al. 2013

Sex Dev

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“…We sequenced ~900 bp of the mitochondrial cytochrome-b ( cyt-b ), in all individuals as described [28]. For nuclear data, we amplified and cloned a ~500 bp part α-Fibrinogen intron 1 (methods and cross-amplifying primers: [29]) in a representative subset of individuals ( H. japonica : n = 36, H. immaculata : n = 2; we included published sequences for H. suweonensis , see below).…”

Section: Methodsmentioning

confidence: 99%

Phylogeography reveals an ancient cryptic radiation in East-Asian tree frogs (Hyla japonica group) and complex relationships between continental and island lineages

et al. 2016

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BackgroundIn contrast to the Western Palearctic and Nearctic biogeographic regions, the phylogeography of Eastern-Palearctic terrestrial vertebrates has received relatively little attention. In East Asia, tectonic events, along with Pleistocene climatic conditions, likely affected species distribution and diversity, especially through their impact on sea levels and the consequent opening and closing of land-bridges between Eurasia and the Japanese Archipelago. To better understand these effects, we sequenced mitochondrial and nuclear markers to determine phylogeographic patterns in East-Asian tree frogs, with a particular focus on the widespread H. japonica.ResultsWe document several cryptic lineages within the currently recognized H. japonica populations, including two main clades of Late Miocene divergence (~5 Mya). One occurs on the northeastern Japanese Archipelago (Honshu and Hokkaido) and the Russian Far-East islands (Kunashir and Sakhalin), and the second one inhabits the remaining range, comprising southwestern Japan, the Korean Peninsula, Transiberian China, Russia and Mongolia. Each clade further features strong allopatric Plio-Pleistocene subdivisions (~2-3 Mya), especially among continental and southwestern Japanese tree frog populations. Combined with paleo-climate-based distribution models, the molecular data allowed the identification of Pleistocene glacial refugia and continental routes of postglacial recolonization. Phylogenetic reconstructions further supported genetic homogeneity between the Korean H. suweonensis and Chinese H. immaculata, suggesting the former to be a relic population of the latter that arose when the Yellow Sea formed, at the end of the last glaciation.ConclusionsPatterns of divergence and diversity were likely triggered by Miocene tectonic activities and Quaternary climatic fluctuations (including glaciations), causing the formation and disappearance of land-bridges between the Japanese islands and the continent. Overall, this resulted in a ring-like diversification of H. japonica around the Sea of Japan. Our findings urge for important taxonomic revisions in East-Asian tree frogs. First, they support the synonymy of H. suweonensis (Kuramoto, 1980) and H. immaculata (Boettger, 1888). Second, the nominal H. japonica (Günther, 1859) represents at least two species: an eastern (new taxon A) on the northern Japanese and Russian Far East islands, and a southwestern species (n. t. B) on southern Japanese islands and possibly also forming continental populations. Third, these continental tree frogs may also represent an additional entity, previously described as H. stepheni Boulenger, 1888 (senior synonym of H. ussuriensis Nikolskii, 1918). A complete revision of this group requires further taxonomic and nomenclatural analyses, especially since it remains unclear to which taxon the species-epitheton japonica corresponds to.Electronic supplementary materialThe online version of this article (doi:10.1186/s12862-016-0814-x) contains supplementary material, which is available to author...

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“…Habitat alteration, including changes in traditional land-use and urbanization (BOSCH et al, 2009), is its principal threat. STÖCK et al, 2012). Widespread in Morocco from coastal wetlands to montane habitats, it inhabits most areas adjacent to still or moving water (Fig.…”

Section: Discoglossus Pictusmentioning

confidence: 99%

Amphibians of Morocco, including Western Sahara: a status report

Reques

Pleguezuelos

Busack³

et al. 2013

Basic Appl Herpetol

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

Cited by 95 publications

References 40 publications

Maintenance of Ancestral Sex Chromosomes in Palearctic Tree Frogs: Direct Evidence from <b><i>Hyla orientalis</i></b>

Maintenance of Ancestral Sex Chromosomes in Palearctic Tree Frogs: Direct Evidence from <b><i>Hyla orientalis</i></b>

Phylogeography reveals an ancient cryptic radiation in East-Asian tree frogs (Hyla japonica group) and complex relationships between continental and island lineages

Amphibians of Morocco, including Western Sahara: a status report

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