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dc.contributor.authorNguyen, Tan Thi
dc.contributor.authorLandfald, Bjarne
dc.date.accessioned2016-03-08T12:58:41Z
dc.date.available2016-03-08T12:58:41Z
dc.date.issued2015-01-23
dc.description.abstractSpatial variations in composition of marine microbial communities and its causes have largely been disclosed in studies comprising rather large environmental and spatial differences. In the present study, we explored if a moderate but temporally permanent climatic division within a contiguous arctic shelf seafloor was traceable in the diversity patterns of its bacterial and archaeal communities. Soft bottom sediment samples were collected at 10 geographical locations, spanning spatial distances of up to 640 km, transecting the oceanic polar front in the Barents Sea. The northern sampling sites were generally colder, less saline, shallower, and showed higher concentrations of freshly sedimented phytopigments compared to the southern study locations. Sampling sites depicted low variation in relative abundances of taxa at class level, with persistent numerical dominance by lineages of Gamma- and Deltaproteobacteria (57–66% of bacterial sequence reads). The Archaea, which constituted 0.7–1.8% of 16S rRNA gene copy numbers in the sediment, were overwhelmingly (85.8%) affiliated with the Thaumarchaeota. Beta-diversity analyses showed the environmental variations throughout the sampling range to have a stronger impact on the structuring of both the bacterial and archaeal communities than spatial effects. While bacterial communities were significantly influenced by the combined effect of several weakly selective environmental differences, including temperature, archaeal communities appeared to be more uniquely structured by the level of freshly sedimented phytopigments.en_US
dc.descriptionPublished version. Also available at <a href= http://dx.doi.org/10.3389/fmicb.2015.00017> http://dx.doi.org/10.3389/fmicb.2015.00017</a>en_US
dc.identifier.citationFrontiers in Microbiology 2015, 6:17en_US
dc.identifier.cristinIDFRIDAID 1206155
dc.identifier.doi10.3389/fmicb.2015.00017
dc.identifier.issn1664-302X
dc.identifier.urihttps://hdl.handle.net/10037/8764
dc.identifier.urnURN:NBN:no-uit_munin_8335
dc.language.isoengen_US
dc.publisherFrontiersen_US
dc.rights.accessRightsopenAccess
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Basale biofag: 470::Generell mikrobiologi: 472en_US
dc.subjectVDP::Mathematics and natural science: 400::Basic biosciences: 470::General microbiology: 472en_US
dc.subjectarchaeaen_US
dc.subjectbacteriaen_US
dc.subjectBarents Seaen_US
dc.subjectbeta-diversityen_US
dc.subjectsedimenten_US
dc.subject16S rRNA geneen_US
dc.titlePolar front associated variation in prokaryotic community structure in Arctic shelf seaflooren_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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