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dc.contributor.authorHoppe, Clara J. M.
dc.contributor.authorFuchs, Niels
dc.contributor.authorNotz, Dirk
dc.contributor.authorAnderson, Philip
dc.contributor.authorAssmy, Philipp Kurt Wolf
dc.contributor.authorBerge, Jørgen
dc.contributor.authorBratbak, Gunnar
dc.contributor.authorGuillou, Gaël
dc.contributor.authorKraberg, Alexandra
dc.contributor.authorLarsen, Aud
dc.contributor.authorLebreton, Benoit
dc.contributor.authorLeu, Eva
dc.contributor.authorLucassen, Magnus
dc.contributor.authorMüller, Oliver
dc.contributor.authorOziel, Laurent
dc.contributor.authorRost, Björn
dc.contributor.authorSchartmüller, Bernhard
dc.contributor.authorTorstensson, Anders
dc.contributor.authorWloka, Jonas
dc.date.accessioned2024-10-01T12:28:15Z
dc.date.available2024-10-01T12:28:15Z
dc.date.issued2024-09-04
dc.description.abstractPhotosynthesis is one of the most important biological processes on Earth, providing the main source of bioavailable energy, carbon, and oxygen via the use of sunlight. Despite this importance, the minimum light level sustaining photosynthesis and net growth of primary producers in the global ocean is still unknown. Here, we present measurements from the MOSAiC field campaign in the central Arctic Ocean that reveal the resumption of photosynthetic growth and algal biomass buildup under the ice pack at a daily average irradiance of not more than 0.04 ± 0.02 µmol photons m<sup>−2</sup> s<sup>−1</sup> in late March. This is at least one order of magnitude lower than previous estimates (0.3–5 µmol photons m<sup>−2</sup> s<sup>−1</sup>) and near the theoretical minimum light requirement of photosynthesis (0.01 µmol photons m<sup>−2</sup> s<sup>−1</sup>). Our findings are based on measurements of the temporal development of the under-ice light field and concurrent measurements of both chlorophyll a concentrations and potential net primary production underneath the sea ice at 86 °N. Such low light requirements suggest that euphotic zones where photosynthesis can occur in the world’s oceans may extend further in depth and time, with major implications for global productivity estimates.en_US
dc.identifier.citationHoppe, Fuchs, Notz, Anderson, Assmy, Berge, Bratbak, Guillou, Kraberg, Larsen, Lebreton, Leu, Lucassen, Müller, Oziel, Rost, Schartmüller, Torstensson, Wloka. Photosynthetic light requirement near the theoretical minimum detected in Arctic microalgae. Nature Communications. 2024;15en_US
dc.identifier.cristinIDFRIDAID 2300522
dc.identifier.doi10.1038/s41467-024-51636-8
dc.identifier.issn2041-1723
dc.identifier.urihttps://hdl.handle.net/10037/34956
dc.language.isoengen_US
dc.publisherSpringer Natureen_US
dc.relation.journalNature Communications
dc.relation.projectIDNorges forskningsråd: 280292en_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.titlePhotosynthetic light requirement near the theoretical minimum detected in Arctic microalgaeen_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)