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    Ancient DNA from marine sediments: Precautions and considerations for seafloor coring, sample handling and data generation

    Access Status
    Fulltext not available
    Authors
    Armbrecht, L.H.
    Coolen, Marco
    Lejzerowicz, F.
    George, S.C.
    Negandhi, K.
    Suzuki, Y.
    Young, J.
    Foster, N.R.
    Armand, L.K.
    Cooper, A.
    Ostrowski, M.
    Focardi, A.
    Stat, Michael
    Moreau, J.W.
    Weyrich, L.S.
    Date
    2019
    Type
    Journal Article
    
    Metadata
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    Citation
    Armbrecht, L.H. and Coolen, M.J.L. and Lejzerowicz, F. and George, S.C. and Negandhi, K. and Suzuki, Y. and Young, J. et al. 2019. Ancient DNA from marine sediments: Precautions and considerations for seafloor coring, sample handling and data generation. Earth-Science Reviews. 196: 102887.
    Source Title
    Earth-Science Reviews
    DOI
    10.1016/j.earscirev.2019.102887
    ISSN
    0012-8252
    Faculty
    Faculty of Science and Engineering
    School
    School of Earth and Planetary Sciences (EPS)
    School of Molecular and Life Sciences (MLS)
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/LP160100839
    URI
    http://hdl.handle.net/20.500.11937/90975
    Collection
    • Curtin Research Publications
    Abstract

    The study of ancient DNA (aDNA) from sediments (sedaDNA) offers great potential for paleoclimate interpretation, and has recently been applied as a tool to characterise past marine life and environments from deep ocean sediments over geological timescales. Using sedaDNA, palaeo-communities have been detected, including prokaryotes and eukaryotes that do not fossilise, thereby revolutionising the scope of marine micropalaeontological research. However, many studies to date have not reported on the measures taken to prove the authenticity of sedaDNA-derived data from which conclusions are drawn. aDNA is highly fragmented and degraded and extremely sensitive to contamination by non-target environmental DNA. Contamination risks are particularly high on research vessels, drilling ships and platforms, where logistics and facilities do not yet allow for sterile sediment coring, and due consideration needs to be given to sample processing and analysis following aDNA guidelines. This review clarifies the use of aDNA terminology, discusses common pitfalls and highlights the urgency behind adopting new standards for marine sedaDNA research, with a focus on sampling optimisation to facilitate the incorporation of routine sedaDNA research into International Ocean Discovery Program (IODP) operations. Currently available installations aboard drilling ships and platforms are reviewed, improvements suggested, analytical approaches detailed, and the controls and documentation necessary to support the authenticity of aDNA retrieved from deep-sea sediment cores is outlined. Beyond practical considerations, concepts relevant to the study of past marine biodiversity based on sedaDNA, and the applicability of the new guidelines to the study of other contamination-susceptible environments (permafrost and outer space) are discussed.

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