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Palaeodemographic modelling supports a population bottleneck during the Pleistocene-Holocene transition in Iberia.

Fernández-López de Pablo, Javier and Gutiérrez-Roig, Mario and Gómez-Puche, Madalena and McLaughlin, Rowan and Silva, Fabio and Lozano, Sergi (2019) 'Palaeodemographic modelling supports a population bottleneck during the Pleistocene-Holocene transition in Iberia.' Nature Communications, 10. ISSN 2041-1723

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Abstract

Demographic change lies at the core of debates on genetic inheritance and resilience to climate change of prehistoric hunter-gatherers. Here we analyze the radiocarbon record of Iberia to reconstruct long-term changes in population levels and test different models of demographic growth during the Last Glacial-Interglacial transition. Our best fitting demographic model is composed of three phases. First, we document a regime of exponential population increase during the Late Glacial warming period (c.16.6-12.9 kya). Second, we identify a phase of sustained population contraction and stagnation, beginning with the cold episode of the Younger Dryas and continuing through the first half of the Early Holocene (12.9-10.2 kya). Finally, we report a third phase of density-dependent logistic growth (10.2-8 kya), with rapid population increase followed by stabilization. Our results support a population bottleneck hypothesis during the Last Glacial-Interglacial transition, providing a demographic context to interpret major shifts of prehistoric genetic groups in south-west Europe.

Item Type: Article
Uncontrolled Keywords: Humans, Models, Theoretical, Archaeology, Paleontology, History, Ancient, Europe, Radiometric Dating, Climate Change, Human Migration
Divisions: Faculty of Science and Health > Mathematical Sciences, Department of
Depositing User: Elements
Date Deposited: 07 Sep 2020 13:59
Last Modified: 07 Sep 2020 14:15
URI: http://repository.essex.ac.uk/id/eprint/27323

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