Craniofacial evolution in polynesia: A geometric morphometric study of population diversity
Article first published online: 17 SEP 2012
Copyright © 2012 Wiley Periodicals, Inc.
American Journal of Human Biology
Volume 24, Issue 6, pages 776–785, November/December 2012
How to Cite
Buck, T. and Viđarsdóttir, U. S. (2012), Craniofacial evolution in polynesia: A geometric morphometric study of population diversity. Am. J. Hum. Biol., 24: 776–785. doi: 10.1002/ajhb.22315
- Issue published online: 15 OCT 2012
- Article first published online: 17 SEP 2012
- Manuscript Accepted: 2 AUG 2012
- Manuscript Revised: 29 JUN 2012
- Manuscript Received: 5 APR 2012
- NERC EFCHED programme. Grant Number: NER/T/S/2002/00472
This study tests differences in craniofacial size and shape attributed to demographic history and plastic responses to differing environments in the islands of Polynesia. The dispersal of modern humans into Polynesia provides a useful scenario to investigate the impact of migration on human craniofacial diversity.
Three dimensional geometric morphometric techniques are used to examine morphological diversity within Oceanic population samples. The importance of geographic and climatic variables is quantified by partial linear regression.
The results show a homogeneous Polynesian morphology grouping in relation to neighboring regions. There is, however, considerable diversity within the Polynesian samples themselves. Natural selection due to environmental differences is not an important factor in the patterns of craniofacial diversity found in the samples.
Historical patterns such as migration and population isolation influence patterns of craniofacial morphology within Polynesia, and our results demonstrate that morphological diversity can evolve in populations isolated for a relatively short period of time. Am. J. Hum. Biol., 2012. © 2012 Wiley Periodicals, Inc.