Multiple overseas dispersal in amphibians

Vences, Miguel; Vieites, David R.; Glaw, Frank; Brinkmann, Henner; Kosuch, Joachim; Veith, Michael; Meyer, Axel

Multiple overseas dispersal in amphibians

Dateien

P149.pdfGröße: 400.53 KBDownloads: 559

Datum

2003

Autor:innen

Vences, Miguel

Vieites, David R.

Glaw, Frank

Brinkmann, Henner

Kosuch, Joachim

Veith, Michael

Meyer, Axel

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Biologie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Proceedings. Biological sciences / The Royal Society. 2003, 270(1532), pp. 2435-2442. ISSN 0962-8452. eISSN 1471-2954. Available under: doi: 10.1098/rspb.2003.2516

Zusammenfassung

Amphibians are thought to be unable to disperse over ocean barriers because they do not tolerate the osmotic stress of salt water. Their distribution patterns have therefore generally been explained by vicariance biogeography. Here, we present compelling evidence for overseas dispersal of frogs in the Indian Ocean region based on the discovery of two endemic species on Mayotte. This island belongs to the Comoro archipelago, which is entirely volcanic and surrounded by sea depths of more than 3500 m. This constitutes the first observation of endemic amphibians on oceanic islands that did not have any past physical contact to other land masses. The two species of frogs had previously been thought to be nonendemic and introduced from Madagascar, but clearly represent new species based on their morphological and genetic differentiation. They belong to the genera Mantidactylus and Boophis in the family Mantellidae that is otherwise restricted to Madagascar, and are distinguished by morphology and mitochondrial and nuclear DNA sequences from mantellid species occurring in Madagascar. This discovery permits us to update and test molecular clocks for frogs distributed in this region. The new calibrations are in agreement with previous rate estimates and indicate two further Cenozoic transmarine dispersal events that had previously been interpreted as vicariance: hyperoliid frogs from Africa to Madagascar (Heterixalus) and from Madagascar to the Seychelles islands (Tachycnemis). Our results provide the strongest evidence so far that overseas dispersal of amphibians exists and is no rare exception, although vicariance certainly retains much of its importance in explaining amphibian biogeography.

Fachgebiet (DDC)

570 Biowissenschaften, Biologie

Schlagwörter

Amphibia, Mantellidae, Madagascar, Comoros, phylogeny, biogeography

Zitieren

ISO 690

VENCES, Miguel, David R. VIEITES, Frank GLAW, Henner BRINKMANN, Joachim KOSUCH, Michael VEITH, Axel MEYER, 2003. Multiple overseas dispersal in amphibians. In: Proceedings. Biological sciences / The Royal Society. 2003, 270(1532), pp. 2435-2442. ISSN 0962-8452. eISSN 1471-2954. Available under: doi: 10.1098/rspb.2003.2516

BibTex

@article{Vences2003Multi-7183,
  year={2003},
  doi={10.1098/rspb.2003.2516},
  title={Multiple overseas dispersal in amphibians},
  number={1532},
  volume={270},
  issn={0962-8452},
  journal={Proceedings. Biological sciences / The Royal Society},
  pages={2435--2442},
  author={Vences, Miguel and Vieites, David R. and Glaw, Frank and Brinkmann, Henner and Kosuch, Joachim and Veith, Michael and Meyer, Axel}
}

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