The Rift Valley is a major barrier to dispersal of African clawed frogs (Xenopus) in Ethiopia

Ben J. Evans*, Shireen M. Bliss, Simone A. Mendel, Richard C. Tinsley

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

29 Citations (Scopus)

Abstract

The Ethiopian highlands - home to striking species diversity and endemism - are bisected by the Rift Valley, a zone of tectonic divergence. Using molecular data we examined the evolutionary history of two co-distributed species of African clawed frog (Xenopus clivii and X. largeni) that are endemic to this region. Our field collections substantially extend the known distribution of X. largeni, a species formerly known from highlands southeast of the Rift, but that also occurs to the northwest. In both species, analysis of mitochondrial DNA and 19 autosomal loci identifies significant population structure, suggests little or no recent migration across the Rift Valley, and provides divergence time estimates across the Rift of ∼1-3.5 million years. These results indicate that the Ethiopian Rift Valley is a major obstacle to dispersal of highland-adapted amphibians.

Original languageEnglish
Pages (from-to)4216-4230
Number of pages15
JournalMolecular Ecology
Volume20
Issue number20
DOIs
Publication statusPublished - 1 Oct 2011

Keywords

  • coalescence
  • demography
  • endemicity
  • migration
  • vicariance

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