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dc.contributor.authorPaulsen, Maria Lund
dc.contributor.authorDoré, Hugo
dc.contributor.authorGarczarek, Laurence
dc.contributor.authorSeuthe, Lena
dc.contributor.authorMüller, Oliver
dc.contributor.authorSandaa, Ruth-Anne
dc.contributor.authorBratbak, Gunnar
dc.contributor.authorLarsen, Aud
dc.date.accessioned2017-03-14T08:55:31Z
dc.date.available2017-03-14T08:55:31Z
dc.date.issued2016-10-05
dc.description.abstractIncreasing temperatures, with pronounced effects at high latitudes, have raised questions about potential changes in species composition, as well as possible increased importance of small-celled phytoplankton in marine systems. In this study, we mapped out one of the smallest and globally most widespread primary producers, the picocyanobacterium Synechococcus, within the Atlantic inflow to the Arctic Ocean. In contrast to the general understanding that Synechococcus is almost absent in polar oceans due to low temperatures, we encountered high abundances (up to 21,000 cells mL−1) at 79◦N, and documented their presence as far north as 82.5◦N. Covering an annual cycle in 2014, we found that during autumn and winter, Synechococcus was often more abundant than picoeukaryotes, which usually dominate the picophytoplankton communities in the Arctic. Synechococcus community composition shifted from a quite high genetic diversity during the spring bloom to a clear dominance of two specific operational taxonomic units (OTUs) in autumn and winter. We observed abundances higher than 1000 cells mL−1 in water colder than 2◦C at seven distinct stations and size-fractionation experiments demonstrated a net growth of Synechococcus at 2◦C in the absence of nano-sized grazers at certain periods of the year. Phylogenetic analysis of petB sequences demonstrated that these high latitude Synechococcus group within the previously described cold-adapted clades I and IV, but also contributed to unveil novel genetic diversity, especially within clade I.en_US
dc.descriptionPublished version. Source at <a href=https://doi.org/10.3389/fmars.2016.00191> https://doi.org/10.3389/fmars.2016.00191 </a>en_US
dc.identifier.citationPaulsen ML. et.al.: Synechococcus in the Atlantic Gateway to the Arctic Ocean. Frontiers in Marine Science. 2016;3:191en_US
dc.identifier.cristinIDFRIDAID 1386144
dc.identifier.doi10.3389/fmars.2016.00191
dc.identifier.issn2296-7745
dc.identifier.urihttps://hdl.handle.net/10037/10621
dc.language.isoengen_US
dc.publisherFrontiers Mediaen_US
dc.relation.journalFrontiers in Marine Science
dc.relation.projectIDinfo:eu-repo/grantAgreement/NRC/POLARPROG/225956/Jurisdiction/ ProcessesAndPlayersInArcticMarinePelagicFoodWebs//en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/NRC/POLARPROG/226415/Jurisdiction/BridgingMarineProductivityRegimes//en_US
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497en_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497en_US
dc.subjectpicocyanobacteriaen_US
dc.subjectpicoeukaryotesen_US
dc.subjecttemperature adaptationen_US
dc.subjectpetB sequencesen_US
dc.subjectflow cytometryen_US
dc.subjecthigh latitude ecosystemsen_US
dc.subjectSvalbarden_US
dc.subjectWest Spitsbergen Currenten_US
dc.titleSynechococcus in the Atlantic Gateway to the Arctic Oceanen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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