Cristin-resultat-ID: 1723372
Sist endret: 10. september 2019 15:10
Resultat
Poster
2019

Reconstructing past Arctic sea ice using sedimentary ancient DNA

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

Konferanse

Tittel: International Conference on Paleoceanography 14

Sted:

Sydney
Australia
Utbredelsesområde: Internasjonalt
Årstall: 2019
Dato fra: 2. juni 2019
Dato til: 6. juni 2019

Om resultatet

Poster
Publiseringsår: 2019
Plenar

Finansiering

  • EC/H2020
    Prosjektkode: 818449
  • Norges forskningsråd
    Prosjektkode: 268062

Beskrivelse Beskrivelse

Tittel

Reconstructing past Arctic sea ice using sedimentary ancient DNA

Sammendrag

Records beyond observational time scales are essential for documenting and understanding the natural variations in Arctic sea ice extent. However, the tools to document sea ice conditions on historical to geological time scales are few and have limitations. As a consequence, sea ice remains incompletely understood although it is a crucial component of the Arctic and global climate system. We have explored sedimentary ancient DNA (sedaDNA) as a novel tool for past sea ice reconstructions. We use metabarcoding and single-species quantitative DNA detection methods to document the sea ice conditions in a Greenland Sea marine sediment core. Metabarcoding has allowed identifying biodiversity changes back to ~100,000 years ago that we relate to changing sea ice conditions. Detailed bioinformatics further revealed several sea-ice-associated taxa, of which several were previously unknown from the “traditional” (micro)fossil record. The results from our genetic approaches corroborate sea ice reconstructions by traditional tools (dinoflagellate cyst assemblages and sea ice biomarker IP25). In summary, we show that sedaDNA has great potential for documenting past sea ice conditions beyond instrumental time scales and provides a new tool to better understand past sea ice evolution.

Bidragsytere

Stijn De Schepper

  • Tilknyttet:
    Forfatter
    ved Institutt for geovitenskap ved Universitetet i Bergen

Jessica Louise Ray

  • Tilknyttet:
    Forfatter
    ved NORCE Norwegian Research Centre AS

Henrik Sadatzki

  • Tilknyttet:
    Forfatter
    ved Institutt for geovitenskap ved Universitetet i Bergen

Katrine Sandnes Skaar

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

Aud Larsen

  • Tilknyttet:
    Forfatter
    ved NORCE Norwegian Research Centre AS
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