Massive expansion of marine archaea during a mid-Cretaceous oceanic anoxic event

M.M.M. Kuypers, P. Blokker, J. Erbacher, Hanno Kinkel, R.D. Pancost, S. Schouten, J.S. Sinninghe Damsté

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    Abstrakt

    Biogeochemical and stable carbon isotopic analysis of black-shale sequences deposited during an Albian oceanic anoxic event (∼112 million years ago) indicate that up to 80 weight percent of sedimentary organic carbon is derived from marine, nonthermophilic archaea. The carbon-13 content of archaeal molecular fossils indicates that these archaea were living chemoautotrophically. Their massive expansion may have been a response to the strong stratification of the ocean during this anoxic event. Indeed, the sedimentary record of archaeal membrane lipids suggests that this anoxic event marks a time in Earth history at which certain hyperthermophilic archaea adapted to low-temperature environments.
    OriginalsprogEngelsk
    TidsskriftScience
    Vol/bind293
    Udgave nummer5527
    Sider (fra-til)92-94
    Antal sider3
    ISSN0036-8075
    DOI
    StatusUdgivet - 6. jul. 2001

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