Within-island diversification in a passerine bird. Issue 1923 (25th March 2020)
- Record Type:
- Journal Article
- Title:
- Within-island diversification in a passerine bird. Issue 1923 (25th March 2020)
- Main Title:
- Within-island diversification in a passerine bird
- Authors:
- Gabrielli, Maëva
Nabholz, Benoit
Leroy, Thibault
Milá, Borja
Thébaud, Christophe - Abstract:
- Abstract : The presence of congeneric taxa on the same island suggests the possibility of in situ divergence, but can also result from multiple colonizations of previously diverged lineages. Here, using genome-wide data from a large population sample, we test the hypothesis that intra-island divergence explains the occurrence of four geographical forms meeting at hybrid zones in the Reunion grey white-eye ( Zosterops borbonicus ), a species complex endemic to the small volcanic island of Reunion. Using population genomic and phylogenetic analyses, we reconstructed the population history of the different forms. We confirmed the monophyly of the complex and found that one of the lowland forms is paraphyletic and basal relative to others, a pattern highly consistent with in situ divergence. Our results suggest initial colonization of the island through the lowlands, followed by expansion into the highlands, which led to the evolution of a distinct geographical form, genetically and ecologically different from the lowland ones. Lowland forms seem to have experienced periods of geographical isolation, but they diverged from one another by sexual selection rather than niche change. Overall, low dispersal capabilities in this island bird combined with both geographical and ecological opportunities seem to explain how divergence occurred at such a small spatial scale.
- Is Part Of:
- Proceedings. Volume 287:Issue 1923(2020)
- Journal:
- Proceedings
- Issue:
- Volume 287:Issue 1923(2020)
- Issue Display:
- Volume 287, Issue 1923 (2020)
- Year:
- 2020
- Volume:
- 287
- Issue:
- 1923
- Issue Sort Value:
- 2020-0287-1923-0000
- Page Start:
- Page End:
- Publication Date:
- 2020-03-25
- Subjects:
- speciation -- population differentiation -- geographical isolation -- niche evolution -- island -- Zosterops
Biology -- Periodicals
570.5 - Journal URLs:
- https://royalsocietypublishing.org/journal/rspb ↗
- DOI:
- 10.1098/rspb.2019.2999 ↗
- Languages:
- English
- ISSNs:
- 0962-8452
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library STI - ELD Digital store
- Ingest File:
- 16350.xml