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dc.contributor.authorHegseth, Else Nøst
dc.contributor.authorvon Quillfeldt, Cecilie
dc.date.accessioned2022-08-17T08:29:27Z
dc.date.available2022-08-17T08:29:27Z
dc.date.issued2022-01-27
dc.description.abstractThis work summarizes ice algal studies, presented as biomass and species temporal and spatial distribution, during 11 cruises conducted between 1986 and 2012. The majority of the biomass was found as loosely attached sub-ice algal layers, and sampling required diving. A maximum of 40 mg chlorophyll m<sup>−2</sup> and 15.4 × 10<sup>9</sup> cells m<sup>−2</sup> was measured in May. The species diversity was separated in zones based on ice thickness, with the highest biodiversity in the medium-thick ice of 30–80 cm. Nitzschia frigida was the most common species. There was a significant positive relationship between the dominance of this species and ice thickness, and it dominated completely in thick ice. Other common species, such as N. promare and Fossulaphycus arcticus reacted oppositely, by becoming less dominant in thick ice, but the positive correlation between total cell numbers and number of these three species indicated that they would most likely dominate in most populations. Melosira arctica was found several times below medium-thick annual ice. Algae occurred from top to bottom in the ice floes and in infiltration layers, but in very low numbers inside the ice. The bipolar dinoflagellates Polarella glacialis inhabited the ice, both as vegetative cells and cysts. The algal layers detached from the ice and sank in late spring when melting started. The cells in the sediments form an important food source for benthic animals throughout the year. Fjord populations survive the winter on the bottom and probably form next year’s ice algal inoculum. A few ‘over-summer’ populations found in sheltered locations might provide supplementary food for ice amphipods in late summer. The future faith of the ice flora is discussed in view of a warmer climate, with increased melting of the Arctic ice cover.en_US
dc.identifier.citationHegseth, von Quillfeldt. The Sub-Ice Algal Communities of the Barents Sea Pack Ice: Temporal and Spatial Distribution of Biomass and Species. Journal of Marine Science and Engineering. 2022;10(2)en_US
dc.identifier.cristinIDFRIDAID 2021692
dc.identifier.doi10.3390/jmse10020164
dc.identifier.issn2077-1312
dc.identifier.urihttps://hdl.handle.net/10037/26231
dc.language.isoengen_US
dc.publisherMDPIen_US
dc.relation.journalJournal of Marine Science and Engineering
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2022 The Author(s)en_US
dc.subjectVDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497en_US
dc.subjectVDP::Mathematics and natural scienses: 400::Zoology and botany: 480::Marine biology: 497en_US
dc.subjectArktis / Arcticen_US
dc.subjectIsalger / Ice algaeen_US
dc.titleThe Sub-Ice Algal Communities of the Barents Sea Pack Ice: Temporal and Spatial Distribution of Biomass and Speciesen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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