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dc.contributor.authorSeuthe, Lenaeng
dc.contributor.authorTöpper, Birteeng
dc.contributor.authorReigstad, Mariteng
dc.contributor.authorThyrhaug, Runareng
dc.contributor.authorVaquer-Sunyer, Raqueleng
dc.date.accessioned2012-08-09T07:48:00Z
dc.date.issued2011-09-20eng
dc.identifier.citationAquatic Microbial Ecology 64(3): 253-266
dc.identifier.issn0948-3055eng
dc.identifier.urihttp://hdl.handle.net/1956/5931
dc.description.abstractMarine microbial communities have been little studied in Arctic waters, especially during the winter–spring transition before the development of extensive phytoplankton blooms. This study investigated microbial plankton in the ice-covered polar surface waters of the northwestern Fram Strait (75 to 80°N) at the onset of the 24 h light period in spring (April to May). The system we encountered was characterised by low concentrations of chlorophyll a (<0.2 μg l−1) and a low abundance of both bacteria (1.4 to 2.5 × 108 cells l−1) and protists (1 to 1.7 × 105 cells l−1). Bacterial production was very low (≤0.63 μg C l−1 d−1), despite the dominance of nucleic-acid-rich bacteria (58 ± 6% of total bacterial abundance). Small (2 to 5 μm) phototrophs dominated the eukaryotic assemblage in the surface and most probably had profound effects on the composition and metabolic balance of the microbial community as a whole. Most stations appeared to have been net-autotrophic, and calculations of phagotrophy indicated a balanced carbon budget for the microbial community. Mixotrophy was seen in a large part of the ciliate assemblage and may have contributed to the productivity and stability of the pre-bloom system that we encountered.en
dc.language.isoengeng
dc.publisherInter-Researcheng
dc.relation.ispartof<a href="http://hdl.handle.net/1956/5929" target="blank">Bacterial community structures in the Arctic Ocean: the effect of increased carbon load on nutrient competition and bacterial diversity</a>eng
dc.subjectFlow cytometryeng
dc.subjectBacteriaeng
dc.subjectMicrozooplanktoneng
dc.subjectMixotrophyeng
dc.subjectPlanktonic metabolismeng
dc.titleMicrobial communities and processes in ice-covered Arctic waters of the northwestern Fram Strait (75 to 80° N) during the vernal pre-bloom phaseeng
dc.typePeer reviewedeng
dc.typeJournal articleeng
dc.subject.nsiVDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488eng
dc.rights.holderCopyright Inter-Research. All rights reserved.
dc.embargo.liftdate2014-09-20
dc.type.versionpublishedVersioneng
dc.embargo.terms2014-09-20eng
bora.peerreviewedPeer reviewedeng
bibo.doihttp://dx.doi.org/10.3354/ame01525eng
dc.identifier.doihttp://dx.doi.org/10.3354/ame01525
dcterms.isPartOfhttp://hdl.handle.net/1956/5929


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