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dc.contributor.authorHarðardóttir, Sara
dc.contributor.authorHaile, James S.
dc.contributor.authorRay, Jessica Louise
dc.contributor.authorLimoges, Audrey
dc.contributor.authorVan Nieuwenhove, Nicolas
dc.contributor.authorLalande, Catherine
dc.contributor.authorGrondin, Pierre-Luc
dc.contributor.authorJackson, Rebecca
dc.contributor.authorSkaar, Katrine Sandnes
dc.contributor.authorHeikkilä, Maija
dc.contributor.authorBerge, Jørgen
dc.contributor.authorLundholm, Nina
dc.contributor.authorMassé, Guillaume
dc.contributor.authorRysgaard, Søren
dc.contributor.authorSeidenkrantz, Marit-Solveig
dc.contributor.authorDe Schepper, Stijn
dc.contributor.authorLorenzen, Eline D.
dc.contributor.authorLovejoy, Connie
dc.contributor.authorRibeiro, Sofia
dc.date.accessioned2024-08-21T11:46:45Z
dc.date.available2024-08-21T11:46:45Z
dc.date.issued2024-01-09
dc.description.abstractSea ice is a critical component of the Earth’s Climate System and a unique habitat. Sea-ice changes prior to the satellite era are poorly documented, and proxy methods are needed to constrain its past variability. Here, we demonstrate the potential of sedimentary DNA from Polarella glacialis, a sea-ice microalga, for tracing past sea-ice conditions. We quantified P. glacialis DNA (targeting the nuclear ribosomal ITS1 region) in Arctic marine and fjord surface sediments and a sediment core from northern Baffin Bay spanning 12,000 years. Sea ice and sediment trap samples confirmed that cysts of P. glacialis are common in first-year sea ice and sinking particulate matter following sea-ice melt. Its detection is more efficient with our molecular approach than standard micropaleontological methods. Given that the species inhabits coastal and marine environments in the Arctic and Antarctic, P. glacialis DNA has the potential to become a useful tool for circum-polar sea-ice reconstructions.en_US
dc.identifier.citationHarðardóttir, Haile, Ray, Limoges, Van Nieuwenhove, Lalande, Grondin, Jackson, Skaar, Heikkilä, Berge, Lundholm, Massé, Rysgaard, Seidenkrantz, De Schepper, Lorenzen, Lovejoy, Ribeiro. Millennial-scale variations in Arctic sea ice are recorded in sedimentary ancient DNA of the microalga Polarella glacialis. Communications Earth & Environment. 2024;5(1)en_US
dc.identifier.cristinIDFRIDAID 2230496
dc.identifier.doi10.1038/s43247-023-01179-5
dc.identifier.issn2662-4435
dc.identifier.urihttps://hdl.handle.net/10037/34314
dc.language.isoengen_US
dc.publisherSpringer Natureen_US
dc.relation.journalCommunications Earth & Environment
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/H2020/846860/Norway/Sea ice microalgae DNA fingerprints as proxies in past climate studies/ICEPRINT/en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2024 The Author(s)en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0en_US
dc.rightsAttribution 4.0 International (CC BY 4.0)en_US
dc.titleMillennial-scale variations in Arctic sea ice are recorded in sedimentary ancient DNA of the microalga Polarella glacialisen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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Attribution 4.0 International (CC BY 4.0)
Except where otherwise noted, this item's license is described as Attribution 4.0 International (CC BY 4.0)