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https://hdl.handle.net/2440/120906
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Type: | Journal article |
Title: | Minimum founding populations for the first peopling of Sahul |
Author: | Bradshaw, C.J.A. Ulm, S. Williams, A.N. Bird, M.I. Roberts, R.G. Jacobs, Z. Laviano, F. Weyrich, L.S. Friedrich, T. Norman, K. Saltré, F. |
Citation: | Nature Ecology and Evolution, 2019; 3(7):1057-1063 |
Publisher: | Springer Nature |
Issue Date: | 2019 |
ISSN: | 2397-334X 2397-334X |
Statement of Responsibility: | Corey J.A. Bradshaw, Sean Ulm, Alan N. Williams, Michael I. Bird, Richard G. Roberts, Zenobia Jacobs, Fiona Laviano, Laura S. Weyrich, Tobias Friedrich, Kasih Norman, and Frédérik Saltré |
Abstract: | The timing, context and nature of the first people to enter Sahul is still poorly understood owing to a fragmented archaeological record. However, quantifying the plausible demographic context of this founding population is essential to determine how and why the initial peopling of Sahul occurred. We developed a stochastic, age-structured model using demographic rates from hunter-gatherer societies, and relative carrying capacity hindcasted with LOVECLIM's net primary productivity for northern Sahul. We projected these populations to determine the resilience and minimum sizes required to avoid extinction. A census founding population of between 1,300 and 1,550 individuals was necessary to maintain a quasi-extinction threshold of ≲0.1. This minimum founding population could have arrived at a single point in time, or through multiple voyages of ≥130 people over ~700-900 years. This result shows that substantial population amalgamation in Sunda and Wallacea in Marine Isotope Stages 3-4 provided the conditions for the successful, large-scale and probably planned peopling of Sahul. |
Keywords: | Humans Demography Archaeology |
Rights: | © The Author(s), under exclusive licence to Springer Nature Limited 2019 |
DOI: | 10.1038/s41559-019-0902-6 |
Grant ID: | http://purl.org/au-research/grants/arc/CE170100015 http://purl.org/au-research/grants/arc/FT120100656 http://purl.org/au-research/grants/arc/FL140100044 http://purl.org/au-research/grants/arc/FL130100116 http://purl.org/au-research/grants/arc/FT150100138 http://purl.org/au-research/grants/arc/FT180100407 |
Published version: | http://dx.doi.org/10.1038/s41559-019-0902-6 |
Appears in Collections: | Aurora harvest 4 Earth and Environmental Sciences publications |
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