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dc.contributor.authorHancke, Kasper
dc.contributor.authorKristiansen, Svein
dc.contributor.authorLund-Hansen, Chresten
dc.date.accessioned2022-06-01T07:04:59Z
dc.date.available2022-06-01T07:04:59Z
dc.date.issued2022-04-12
dc.description.abstractArctic summer sea ice extent is decreasing and thinning, forming melt ponds that cover more than 50% of the sea ice area during the peak of the melting season. Despite of this, ice algal communities in melt ponds are understudied and so are their contribution to the Arctic Ocean primary production and carbon turnover. While melt ponds have been considered as low productive, recent studies suggest that accumulated ice algal potentially facilitate high and yet overlooked rates of carbon turnover. Here we report on ice algal communities forming dense mats not previously described, collected from melt ponds in the northern Barents Sea in July. We document on distinct layered and brown colored mats with high carbon assimilation and net primary production rates compared to ice algal communities and aggregates, in fact comparable to benthic microalgae at temperate tidal flats. Rates of gross and net primary production, as well as community respiration rates were obtained from oxygen micro profiling, and carbon assimilation calculations were supported by 14C incubations, pigment analysis and light microscopy examinations. The melt pond algal mats consisted of distinct colored layers and differed from aggregates with a consisted layered structure. We accordingly propose the term melt pond algal mats, and further speculate that these dense ice algal mats may provide an important yet overlooked source of organic carbon in the Arctic food-web. A foodweb component likely very sensitive to climate driven changes in the Arctic Ocean and pan-Arctic seas.en_US
dc.identifier.citationHancke K, Kristiansen S, Lund-Hansen. Highly Productive Ice Algal Mats in Arctic Melt Ponds: Primary Production and Carbon Turnover. Frontiers in Marine Science. 2022;9en_US
dc.identifier.cristinIDFRIDAID 2018232
dc.identifier.doi10.3389/fmars.2022.841720
dc.identifier.issn2296-7745
dc.identifier.urihttps://hdl.handle.net/10037/25335
dc.language.isoengen_US
dc.publisherFrontiers Mediaen_US
dc.relation.journalFrontiers in Marine Science
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/SOCIETAL CHALLENGES/869154/EU/The future of Arctic coastal ecosystems - Identifying transitions in fjord systems and adjacent coastal areas /FACE-IT/en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2022 The Author(s)en_US
dc.titleHighly Productive Ice Algal Mats in Arctic Melt Ponds: Primary Production and Carbon Turnoveren_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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