Cristin-resultat-ID: 1707943
Sist endret: 23. oktober 2019 15:00
NVI-rapporteringsår: 2019
Resultat
Vitenskapelig artikkel
2019

The potential of sedimentary ancient DNA for reconstructing past sea ice evolution

Bidragsytere:
  • Stijn De Schepper
  • Jessica Louise Ray
  • Katrine Sandnes Skaar
  • Henrik Sadatzki
  • Umer Zeeshan Ijaz
  • Ruediger Stein
  • mfl.

Tidsskrift

The ISME Journal
ISSN 1751-7362
e-ISSN 1751-7370
NVI-nivå 2

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2019
Publisert online: 2019
Open Access

Importkilder

Scopus-ID: 2-s2.0-85068192485

Finansiering

  • Norges forskningsråd
    Prosjektkode: 268062

Beskrivelse Beskrivelse

Tittel

The potential of sedimentary ancient DNA for reconstructing past sea ice evolution

Sammendrag

Sea ice is a crucial component of the Arctic climate system, yet the tools to document the evolution of sea ice conditions onhistorical and geological time scales are few and have limitations. Such records are essential for documenting andunderstanding the natural variations in Arctic sea ice extent. Here we explore sedimentary ancient DNA (aDNA), as a noveltool that unlocks and exploits the genetic (eukaryote) biodiversity preserved in marine sediments specifically for past sea icereconstructions. Although use of sedimentary aDNA in paleoceanographic and paleoclimatic studies is still in its infancy, weuse here metabarcoding and single-species quantitative DNA detection methods to document the sea ice conditions in aGreenland Sea marine sediment core. Metabarcoding has allowed identifying biodiversity changes in the geological recordback to almost ~100,000 years ago that were related to changing sea ice conditions. Detailed bioinformatic analyses on themetabarcoding data revealed several sea-ice-associated taxa, most of which previously unknown from the fossil record.Finally, we quantitatively traced one known sea ice dinoflagellate in the sediment core. We show that aDNA can berecovered from deep-ocean sediments with generally oxic bottom waters and that past sea ice conditions can be documentedbeyond instrumental time scales. Our results corroborate sea ice reconstructions made by traditional tools, and thusdemonstrate the potential of sedimentary aDNA, focusing primarily on microbial eukaryotes, as a new tool to betterunderstand sea ice evolution in the climate system.

Bidragsytere

Stijn De Schepper

  • Tilknyttet:
    Forfatter
    ved Uni Research Klima ved NORCE Norwegian Research Centre AS

Jessica Louise Ray

  • Tilknyttet:
    Forfatter
    ved Uni Research Miljø ved NORCE Norwegian Research Centre AS

Katrine Sandnes Skaar

  • Tilknyttet:
    Forfatter
    ved Uni Research Miljø ved NORCE Norwegian Research Centre AS

Henrik Sadatzki

  • Tilknyttet:
    Forfatter
    ved The Australian National University
  • Tilknyttet:
    Forfatter
    ved Institutt for geovitenskap ved Universitetet i Bergen

Umer Zeeshan Ijaz

  • Tilknyttet:
    Forfatter
    ved University of Glasgow
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