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dc.contributor.authorHörstmann, Cora
dc.contributor.authorHattermann, Tore
dc.contributor.authorThomé, Pauline C.
dc.contributor.authorButtigieg, Pier Luigi
dc.contributor.authorMorel, Isidora
dc.contributor.authorWaite, Anya M.
dc.contributor.authorJohn, Uwe
dc.date.accessioned2024-03-22T12:39:55Z
dc.date.available2024-03-22T12:39:55Z
dc.date.issued2024-03-02
dc.description.abstractlimate change is opening the Arctic Ocean to increasing human impact and ecosystem changes. Arctic fjords, the region’s most productive ecosystems, are sustained by a diverse microbial community at the base of the food web. Here we show that Arctic fjords become more prokaryotic in the picoplankton (0.2–3 µm) with increasing water temperatures. Across 21 fjords, we found that Arctic fjords had proportionally more trophically diverse (autotrophic, mixotrophic, and heterotrophic) picoeukaryotes, while subarctic and temperate fjords had relatively more diverse prokaryotic trophic groups. Modeled oceanographic connectivity between fjords suggested that transport alone would create a smooth gradient in beta diversity largely following the North Atlantic Current and East Greenland Current. Deviations from this suggested that picoeukaryotes had some strong regional patterns in beta diversity that reduced the effect of oceanographic connectivity, while prokaryotes were mainly stopped in their dispersal if strong temperature differences between sites were present. Fjords located in high Arctic regions also generally had very low prokaryotic alpha diversity. Ultimately, warming of Arctic fjords could induce a fundamental shift from more trophic diverse eukaryotic- to prokaryotic-dominated communities, with profound implications for Arctic ecosystem dynamics including their productivity patterns.en_US
dc.identifier.citationHörstmann C, Hattermann T, Thomé, Buttigieg PL, Morel, Waite AM, John U. Biogeographic gradients of picoplankton diversity indicate increasing dominance of prokaryotes in warmer Arctic fjords. Communications Biology. 2024;7en_US
dc.identifier.cristinIDFRIDAID 2253054
dc.identifier.doi10.1038/s42003-024-05946-8
dc.identifier.issn2399-3642
dc.identifier.urihttps://hdl.handle.net/10037/33243
dc.language.isoengen_US
dc.publisherSpringer Natureen_US
dc.relation.journalCommunications Biology
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.titleBiogeographic gradients of picoplankton diversity indicate increasing dominance of prokaryotes in warmer Arctic fjordsen_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)