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Cultural phylogeography of the Bantu Languages of sub-Saharan Africa.

Authors
  • Currie, Thomas E1
  • Meade, Andrew
  • Guillon, Myrtille
  • Mace, Ruth
  • 1 Human Evolutionary Ecology Group, Department of Anthropology, University College London, 14 Taviton St, London WC1H 0BW, UK. [email protected]
Type
Published Article
Journal
Proceedings of The Royal Society B Biological Sciences
Publisher
The Royal Society
Publication Date
Jul 07, 2013
Volume
280
Issue
1762
Pages
20130695–20130695
Identifiers
DOI: 10.1098/rspb.2013.0695
PMID: 23658203
Source
Medline
Keywords
License
Unknown

Abstract

There is disagreement about the routes taken by populations speaking Bantu languages as they expanded to cover much of sub-Saharan Africa. Here, we build phylogenetic trees of Bantu languages and map them onto geographical space in order to assess the likely pathway of expansion and test between dispersal scenarios. The results clearly support a scenario in which groups first moved south through the rainforest from a homeland somewhere near the Nigeria-Cameroon border. Emerging on the south side of the rainforest, one branch moved south and west. Another branch moved towards the Great Lakes, eventually giving rise to the monophyletic clade of East Bantu languages that inhabit East and Southeastern Africa. These phylogenies also reveal information about more general processes involved in the diversification of human populations into distinct ethnolinguistic groups. Our study reveals that Bantu languages show a latitudinal gradient in covering greater areas with increasing distance from the equator. Analyses suggest that this pattern reflects a true ecological relationship rather than merely being an artefact of shared history. The study shows how a phylogeographic approach can address questions relating to the specific histories of certain groups, as well as general cultural evolutionary processes.

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