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dc.contributor.authorDuncan, Rebecca J.
dc.contributor.authorSøreide, Janne
dc.contributor.authorNielsen, Daniel A.
dc.contributor.authorVarpe, Øystein
dc.contributor.authorWiktor, Józef
dc.contributor.authorTobin, Mark J.
dc.contributor.authorPitusi, Vanessa
dc.contributor.authorPetrou, Katherina
dc.date.accessioned2024-10-04T08:08:15Z
dc.date.available2024-10-04T08:08:15Z
dc.date.issued2024-07-01
dc.description.abstractSea-ice microalgae are a key source of energy and nutrient supply to polar marine food webs, particularly during spring, prior to open-water phytoplankton blooms. The nutritional quality of microalgae as a food source depends on their biomolecular (lipid:protein:carbohydrate) composition. In this study, we used synchrotron-based Fourier transform infra-red microspectroscopy (s-FTIR) to measure the biomolecular content of a dominant sea-ice taxa, Nitzschia frigida, from natural land-fast ice communities throughout the Arctic spring season. Repeated sampling over six weeks from an inner (relatively stable) and an outer (relatively dynamic) fjord site revealed high intra-specific variability in biomolecular content, elucidating the plasticity of N. frigida to adjust to the dynamic sea ice and water conditions. Environmental triggers indicating the end of productivity in the ice and onset of ice melt, including nitrogen limitation and increased water temperature, drove an increase in lipid and fatty acids stores, and a decline in protein and carbohydrate content. In the context of climate change and the predicted Atlantification of the Arctic, dynamic mixing and abrupt warmer water advection could truncate these important end-of-season environmental shifts, causing the algae to be released from the ice prior to adequate lipid storage, influencing carbon transfer through the polar marine system.en_US
dc.identifier.citationDuncan, Søreide, Nielsen, Varpe, Wiktor, Tobin, Pitusi, Petrou. Seasonal environmental transitions and metabolic plasticity in a sea-ice alga from an individual cell perspective. Scientific Reports. 2024;14(1)en_US
dc.identifier.cristinIDFRIDAID 2291345
dc.identifier.doi10.1038/s41598-024-65273-0
dc.identifier.issn2045-2322
dc.identifier.urihttps://hdl.handle.net/10037/35042
dc.language.isoengen_US
dc.publisherSpringer Natureen_US
dc.relation.journalScientific Reports
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.titleSeasonal environmental transitions and metabolic plasticity in a sea-ice alga from an individual cell perspectiveen_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)