Show simple item record

dc.contributor.authorEspinasse, Boris Dristan
dc.contributor.authorDaase, Malin
dc.contributor.authorHalvorsen, Elisabeth
dc.contributor.authorReigstad, Marit
dc.contributor.authorBerge, Jørgen
dc.contributor.authorBasedow, Sünnje Linnéa
dc.date.accessioned2022-08-23T11:12:32Z
dc.date.available2022-08-23T11:12:32Z
dc.date.issued2022-03-16
dc.description.abstractWhile marine ecosystems in polar areas were thought to be mostly inactive during the polar night, recent observations in the Arctic highlight that dynamic biological interactions occur across all trophic levels. One particularly interesting observation made repeatedly is the occurrence of Calanus finmarchicus, a key species at the base of the food web, in the upper part of the water column in early January. This contrasts with the confirmed life cycle of this copepod, which predicts descent to overwintering depths in autumn and ascent at the end of the winter. Here, we compiled 6 years of data from the polar night to explore this unusual behaviour and to investigate the underlying mechanisms that may cause these surface aggregations. Highest abundance of C. finmarchicus in surface waters was closely related to Polar Surface Water in the vicinity of the sea ice edge. A total of six hypotheses are assessed to explain this distribution pattern, which includes passive transport and active behaviour as a way to improve survival chances or food access. In the context of climate change and sea ice decrease, the presence of lipid-rich copepods in cold surface waters could be a key parameter in driving the spatial distributions of top predators in the Arctic.en_US
dc.identifier.citationEspinasse B, Daase M, Halvorsen H, Reigstad M, Berge J, Basedow SL. Surface aggregations of Calanus finmarchicus during the polar night. ICES Journal of Marine Science. 2022en_US
dc.identifier.cristinIDFRIDAID 2014468
dc.identifier.doi10.1093/icesjms/fsac030
dc.identifier.issn1054-3139
dc.identifier.issn1095-9289
dc.identifier.urihttps://hdl.handle.net/10037/26358
dc.language.isoengen_US
dc.publisherOxford University Pressen_US
dc.relation.journalICES Journal of Marine Science
dc.relation.projectIDNorges forskningsråd: 226417en_US
dc.relation.projectIDNorges forskningsråd: 244319en_US
dc.relation.projectIDNorges forskningsråd: 300333en_US
dc.relation.projectIDNorges forskningsråd: 268391en_US
dc.relation.projectIDNorges forskningsråd: 226415en_US
dc.relation.projectIDEC/H2020: 894296en_US
dc.relation.projectIDTromsø forskningsstiftelse: Arctic ABC-Een_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2022 The Author(s)en_US
dc.titleSurface aggregations of Calanus finmarchicus during the polar nighten_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


File(s) in this item

Thumbnail

This item appears in the following collection(s)

Show simple item record