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Early Sri Lankan coastal site tracks technological change and estuarine resource exploitation over the last ca. 25,000 years

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Amano,  Noel
isoTROPIC Independent Research Group, Max Planck Institute of Geoanthropology, Max Planck Society;
Department of Archaeology, Max Planck Institute of Geoanthropology, Max Planck Society;

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Jurkenas,  Dovydas
Department of Archaeology, Max Planck Institute of Geoanthropology, Max Planck Society;

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Roberts,  Patrick       
isoTROPIC Independent Research Group, Max Planck Institute of Geoanthropology, Max Planck Society;
Department of Archaeology, Max Planck Institute of Geoanthropology, Max Planck Society;

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Boivin,  Nicole
Department of Archaeology, Max Planck Institute of Geoanthropology, Max Planck Society;

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Citation

Amano, N., Faulkner, P., Wedage, O., Clarkson, C., Amila, D., del Val, M., et al. (2024). Early Sri Lankan coastal site tracks technological change and estuarine resource exploitation over the last ca. 25,000 years. Scientific Reports, 14(1): 26693. doi:10.1038/s41598-024-77504-5.


Cite as: https://hdl.handle.net/21.11116/0000-0010-2734-8
Abstract
The island of Sri Lanka was part of the South Asian mainland for the majority of the past 115,000 years, and connected most recently during the Last Glacial Maximum via the now submerged Palk Strait. The degree to which rising sea levels shaped past human adaptations from the Pleistocene and into the mid to late Holocene in Sri Lanka has remained unclear, in part because the earliest reliable records of human occupation come from the island’s interior, where cave sites have revealed occupation of tropical forest ecosystems extending back to 48 thousand years (ka). The island’s earliest known open-air sites are all much younger in date, with ages beginning at 15 ka and extending across the Holocene. Here we report the earliest well-dated open-air coastal site in Sri Lanka, Pathirajawela, which records human occupation back to ca. 25,000 years ago. We show that humans at Pathirajawela consistently adapted to changing ecosystems linked to sea level transgression and coastal evolution from the Last Glacial Maximum into the Holocene. The presence of anthropogenic shell midden deposits at the site from ca. 4.8 ka, focused almost exclusively on a single taxon, indicates intensification of estuarine resource exploitation, as humans responded to opportunities presented by the formation of new coastal ecosystems.