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Genetic and Linguistic Coevolution in Northern Island Melanesia
Department of Anthropology, University of New Mexico, Albuquerque, New Mexico.
Centre for Language Studies, Radboud University, Nijmegen, The Netherlands; Max Planck Institute for Psycholinguistics, Nijmegen, The Netherlands.
Stockholm University, Faculty of Humanities, Department of Linguistics, General Linguistics.ORCID iD: 0000-0002-5810-2507
Centre for Language Studies, Radboud University, Nijmegen, The Netherlands.
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2008 (English)In: PLOS Genetics, ISSN 1553-7390, E-ISSN 1553-7404, Vol. 4, no 10, e1000239Article in journal (Refereed) Published
Abstract [en]

Recent studies have detailed a remarkable degree of genetic and linguistic diversity in Northern Island Melanesia. Here we utilize that diversity to examine two models of genetic and linguistic coevolution. The first model predicts that genetic and linguistic correspondences formed following population splits and isolation at the time of early range expansions into the region. The second is analogous to the genetic model of isolation by distance, and it predicts that genetic and linguistic correspondences formed through continuing genetic and linguistic exchange between neighboring populations. We tested the predictions of the two models by comparing observed and simulated patterns of genetic variation, genetic and linguistic trees, and matrices of genetic, linguistic, and geographic distances. The data consist of 751 autosomal microsatellites and 108 structural linguistic features collected from 33 Northern Island Melanesian populations. The results of the tests indicate that linguistic and genetic exchange have erased any evidence of a splitting and isolation process that might have occurred early in the settlement history of the region. The correlation patterns are also inconsistent with the predictions of the isolation by distance coevolutionary process in the larger Northern Island Melanesian region, but there is strong evidence for the process in the rugged interior of the largest island in the region (New Britain). There we found some of the strongest recorded correlations between genetic, linguistic, and geographic distances. We also found that, throughout the region, linguistic features have generally been less likely to diffuse across population boundaries than genes. The results from our study, based on exceptionally fine-grained data, show that local genetic and linguistic exchange are likely to obscure evidence of the early history of a region, and that language barriers do not particularly hinder genetic exchange. In contrast, global patterns may emphasize more ancient demographic events, including population splits associated with the early colonization of major world regions.

Place, publisher, year, edition, pages
2008. Vol. 4, no 10, e1000239
Keyword [en]
Linguistics, historical linguistics, phylogenetics, Melanesia, Papuan Languages
National Category
General Language Studies and Linguistics
Research subject
Linguistics; Linguistics
Identifiers
URN: urn:nbn:se:su:diva-40811DOI: 10.1371/journal.pgen.1000239ISI: 000261480900034OAI: oai:DiVA.org:su-40811DiVA: diva2:127620
Available from: 2008-12-10 Created: 2008-12-05 Last updated: 2017-12-14Bibliographically approved

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