Article

Dental phenotypic shape variation supports a multiple dispersal model for anatomically modern humans in Southeast Asia

Journal of Human Evolution, Elsevier, ISSN 0047-2484

Volume 112, 2017

DOI:10.1016/j.jhevol.2017.08.017, Dimensions: pub.1092057555, PMID: 29037415,

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  1. (1) Aix-Marseille University, grid.5399.6
  2. (2) University College Dublin, grid.7886.1
  3. (3) Muséum national d'Histoire naturelle, Musée de l'Homme, Département Homme et environnement, CNRS, UMR 7206, 75116, Paris, France
  4. (4) University of Ferrara, grid.8484.0
  5. (5) Paris Descartes University, grid.10992.33
  6. (6) University of Copenhagen, grid.5254.6, KU
  7. (7) Muséum national d'Histoire naturelle, Musée de l'Homme, Département Homme et environnement, CNRS, UMR 7194, 75116, Paris, France
  8. (8) University of Otago, grid.29980.3a
  9. (9) Sapporo Medical University, grid.263171.0
  10. (10) Institute of Archaeology, Hanoi, Viet Nam
  11. (11) Center for Southeast Asian Prehistory, 96/203 Hoang Quoc Viet, Hanoi, Viet Nam
  12. (12) Australian National University, grid.1001.0
  13. (13) Department of National Heritage, Ministry of Information and Culture, Vientiane, Lao People's Democratic Republic
  14. (14) University of Illinois at Urbana Champaign, grid.35403.31

Description

The population history of anatomically modern humans (AMH) in Southeast Asia (SEA) is a highly debated topic. The impact of sea level variations related to the Last Glacial Maximum (LGM) and the Neolithic diffusion on past population dispersals are two key issues. We have investigated competing AMH dispersal hypotheses in SEA through the analysis of dental phenotype shape variation on the basis of very large archaeological samples employing two complementary approaches. We first explored the structure of between- and within-group shape variation of permanent human molar crowns. Second, we undertook a direct test of competing hypotheses through a modeling approach. Our results identify a significant LGM-mediated AMH expansion and a strong biological impact of the spread of Neolithic farmers into SEA during the Holocene. The present work thus favors a "multiple AMH dispersal" hypothesis for the population history of SEA, reconciling phenotypic and recent genomic data.

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Times Cited: 10

Field Citation Ratio (FCR): 6.99

Relative Citation ratio (RCR): 0.39