Mid-Pleistocene aridity and landscape shifts promoted Palearctic hominin dispersals
Jinbo Zan (),
Julien Louys (),
Robin Dennell,
Michael Petraglia,
Wenxiao Ning,
Xiaomin Fang,
Weilin Zhang and
Zhe Hu
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Jinbo Zan: Chinese Academy of Sciences
Julien Louys: Griffith University
Robin Dennell: University of Exeter
Michael Petraglia: Griffith University
Wenxiao Ning: Chinese Academy of Sciences
Xiaomin Fang: Chinese Academy of Sciences
Weilin Zhang: Chinese Academy of Sciences
Zhe Hu: Chinese Academy of Sciences
Nature Communications, 2024, vol. 15, issue 1, 1-13
Abstract:
Abstract Population expansions and contractions out of and into Africa since the early Pleistocene have influenced the course of human evolution. While local- and regional-scale investigations have provided insights into the drivers of Eurasian hominin dispersals, a continental-scale and integrated study of hominin-environmental interactions across Palearctic Eurasia has been lacking. Here, we report high-resolution (up to ∼5-10 kyr sample interval) carbon isotope time series of loess deposits in Central Asia and northwest China, a region dominated by westerly winds, providing unique paleoecological and paleoclimatic records for over ~3.6 Ma. These data, combined with further syntheses of Pleistocene paleontological and archaeological records and spatio-temporal distributions of Eurasian eolian deposits and river terraces, demonstrate a pronounced transformation of landscapes around the Mid-Pleistocene Climate Transition. Increased climate amplitude and aridity fluctuations over this period led to the widespread formation of more open habitats, river terraces, and desert-loess landscapes, pushing hominins to range more widely and find solutions to increasingly challenging environments. Mid-Pleistocene climatic and ecological transitions, and the formation of modern desert and loess landscapes and river networks, emerge as critical events during the dispersal of early hominins in Palearctic Eurasia.
Date: 2024
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DOI: 10.1038/s41467-024-54767-0
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