Ancient DNA, lipid biomarkers and palaeoecological evidence reveals construction and life on early medieval lake settlements

A.G. Brown, M. Van Hardenbroek, T. Fonville, K. Davies, H. Mackay, E. Murray, K. Head, P. Barratt, F. McCormick, G.F. Ficetola, L. Gielly, A.C.G. Henderson, A. Crone, G. Cavers, P.G. Langdon, N.J. Whitehouse, Duncan Pirrie, I.G. Alsos

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    Abstract

    Direct evidence of ancient human occupation is typically established through archaeological excavation. Excavations are costly and destructive, and practically impossible in some lake and wetland environments. We present here an alternative approach, providing direct evidence from lake sediments using DNA metabarcoding, steroid lipid biomarkers (bile acids) and from traditional
    environmental analyses. Applied to an early Medieval Celtic settlement in Ireland (a crannog) this approach provides a site chronology and direct evidence of human occupation, crops, animal farming and on-site slaughtering. This is the frst independently-dated, continuous molecular archive of human activity from an archeological site, demonstrating a link between animal husbandry, food resources, island use. These sites are under threat but are impossible to preserve in-situ so this approach can be used, with or without excavation, to produce a robust and full site chronology and provide direct evidence of occupation, the use of plants and animals, and activities such as butchery.
    Original languageEnglish
    Article number11807
    Number of pages14
    JournalScientific Reports
    Volume 11
    DOIs
    Publication statusPublished - 4 Jun 2021

    Keywords

    • Biological techniques
    • Ecology
    • Environmental social sciences
    • Limnology

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