Diversification of African tree frogs (genus Leptopelis) in the highlands of Ethiopia

Jacobo Reyes-Velasco, Joseph D. Manthey, Xenia Freilich, Stephane Boissinot

Research output: Contribution to journalArticle

Abstract

The frog genus Leptopelis is composed of ~50 species that occur across sub-Saharan Africa. The majority of these frogs are typically arboreal; however, a few species have evolved a fossorial lifestyle. Most species inhabit lowland forests, but a few species have adapted to high elevations. Five species of Leptopelis occupy the Ethiopian highlands and provide a good opportunity to study the evolutionary transition from an arboreal to a fossorial lifestyle, as well as the diversification in this biodiversity hot spot. We sequenced 14 nuclear and three mitochondrial genes, and generated thousands of SNPs from ddRAD sequencing to study the evolutionary relationships of Ethiopian Leptopelis. The five species of highland Leptopelis form a monophyletic group, which diversified during the late Miocene and Pliocene. We found strong population structure in the fossorial species L. gramineus, with levels of genetic differentiation between populations similar to those found between arboreal species. This could indicate that L. gramineus is a complex of cryptic species. We propose that after the original colonization of the Ethiopian highlands by the ancestor of the L. gramineus group, episodes of vicariance fragmented the ancestral populations of this group. We also report the re-evolution of arboreality in L. susanae, which evolved from a fossorial ancestor, a rare ecological switch in frogs that had previously been reported only once.

Original languageEnglish (US)
Pages (from-to)2256-2270
Number of pages15
JournalMolecular Ecology
Volume27
Issue number9
DOIs
StatePublished - May 1 2018

Fingerprint

Ethiopia
Hylidae
frog
Anura
frogs
highlands
lifestyle
Life Style
ancestry
Mitochondrial Genes
Africa South of the Sahara
Biodiversity
lowland forests
Sub-Saharan Africa
Population
Single Nucleotide Polymorphism
population structure
biodiversity
genetic variation
arboreal species

Keywords

  • amphibians
  • fossoriality
  • phylogeography
  • RAD sequencing

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Genetics

Cite this

Diversification of African tree frogs (genus Leptopelis) in the highlands of Ethiopia. / Reyes-Velasco, Jacobo; Manthey, Joseph D.; Freilich, Xenia; Boissinot, Stephane.

In: Molecular Ecology, Vol. 27, No. 9, 01.05.2018, p. 2256-2270.

Research output: Contribution to journalArticle

Reyes-Velasco, Jacobo ; Manthey, Joseph D. ; Freilich, Xenia ; Boissinot, Stephane. / Diversification of African tree frogs (genus Leptopelis) in the highlands of Ethiopia. In: Molecular Ecology. 2018 ; Vol. 27, No. 9. pp. 2256-2270.
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