Cristin-prosjekt-ID: 536959
Sist endret: 27. juni 2019 09:24
Cristin-prosjekt-ID: 536959
Sist endret: 27. juni 2019 09:24
Prosjekt

Environmental ancient DNA as proxy for sea ice reconstructions

prosjektleder

Stijn De Schepper
ved Uni Research Klima ved NORCE Norwegian Research Centre AS

prosjekteier / koordinerende forskningsansvarlig enhet

  • Uni Research Klima ved NORCE Norwegian Research Centre AS

Finansiering

  • TotalbudsjettNOK 7.988
  • Norges forskningsråd

    • Prosjektkode: 268062

Klassifisering

Vitenskapsdisipliner

Oseanografi • Genetikk og genomikk • Kvartærgeologi, glasiologi • Geofag • Stratigrafi og paleontologi

Emneord

Palynologi • Gammelt DNA • Geokjemi • Sjøis • Molekylær økologi

Kategorier

Prosjektkategori

  • Grunnforskning

Tidsramme

Aktivt
Start: 1. april 2017 Slutt: 30. september 2019

Beskrivelse Beskrivelse

Tittel

Environmental ancient DNA as proxy for sea ice reconstructions

Populærvitenskapelig sammendrag

aDNAPROX is a cross-disciplinary project that brings together paleoceanographers and molecular ecologists from Uni Research to generate essential knowledge on Arctic sea ice. Sea ice is a crucial indicator or ‘canary in the coal mine’ for the Arctic and global climate state. The project aims to be the starting point for providing better insight into the variability of sea ice extent and to increase the knowledge about (the impact of) natural climate change on the Arctic cryosphere. For this reason, we will develop and assess environmental ancient DNA (aDNA) from microscopic algae as a proxy for reconstructing Arctic sea ice evolution. Sediments, recently collected during two cruises to the Greenland and Labrador Sea for the ERC Synergy Ice2Ice project, will be analyzed for aDNA as well as traditional proxies using microfossils (dinoflagellate cysts) and organic biomarkers. This will allow reconstructing the sea ice history over the last ~100,000 years, with special focus on rapid climate fluctuations.

Vitenskapelig sammendrag

Sea ice cover is a 'canary in the coal mine' for the Arctic and global climate state. Sea ice extent is rapidly decreasing and Arctic summers are predicted to be sea-ice free by 2050. Because sea ice is crucial for sustaining local Arctic communities, international ecosystem services and biological diversity, there is an urgent need to understand variability in sea ice cover over longer time scales. Our best tool to predict future sea ice coverage is to understand past trends. Research activities investigating past natural variability in sea ice extent rely on microfossils and/or organic biomarkers produced by organisms that are associated with sea ice. Both methods have inherent assumptions and limitations, which make sea ice reconstructions non-trivial. To improve our understanding of sea ice history in the recent geological past, with special attention to rapid climate change events (e.g. Dansgaard/Oeschgercycles, Heinrich events), we propose to develop a new proxy for determining  past sea ice cover using environmental ancient DNA (aDNA) from Arcticsediments. We have obtained preliminary results indicating that aDNA can
be a valuable proxy to reconstruct past sea ice cover. Here we propose to further develop and assess the aDNA proxy and compare with traditional microfossil and organic biomarker proxies in order to provide a reference framework for understanding present-day and future accelerated sea ice loss as a consequence of anthropogenic climate change. More reliable proxies will aid policy makers and end-users of ecosystem services to make well-informed decisions on climate change mitigation in the Arctic.

prosjektdeltakere

prosjektleder

Stijn De Schepper

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

Christofer Troedsson

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

Henrik Sadatzki

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

Jørund Raukleiv Strømsøe

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

Katrine Sandnes Skaar

  • Tilknyttet:
    Prosjektdeltaker
    ved Uni Research Miljø ved NORCE Norwegian Research Centre AS
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Resultater Resultater

Environmental ancient DNA – a game changer in paleo sea ice research?

De Schepper, Stijn. 2019, NORCENettsider (opplysningsmateriale)

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

De Schepper, Stijn; Ray, Jessica Louise; Skaar, Katrine Sandnes; Sadatzki, Henrik; Ijaz, Umer Zeeshan; Stein, Ruediger; Larsen, Aud. 2019, The ISME Journal. NORCE, AWI, UoG, UIBVitenskapelig artikkel

Using genetic information to understand past Arctic sea ice evolution.

De Schepper, Stijn; Ray, Jessica Louise; Skaar, Katrine Sandnes; Sadatzki, Henrik; Ijaz, Umer Zeeshan; Stein, Ruediger; Larsen, Aud. 2019, Gordon Research Conference - Polar Marine Sciences. NORCE, AWI, UoG, UIBPoster

Exploring environmental ancient DNA as sea ice proxy.

De Schepper, Stijn; Sadatzki, Henrik; Ray, Jessica Louise; Skaar, Katrine Sandnes; Strømsøe, Jørund Raukleiv; Troedsson, Christofer. 2018, Bjerknes Getaway. NORCE, UIBPoster

Interview for a media report on climate in Správy RTVS.

De Schepper, Stijn; Minich, Alexandra. 2018, NORCEIntervju
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