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dc.contributor.authorBasedow, Sünnje Linnéa
dc.contributor.authorSundfjord, Arild
dc.contributor.authorvon Appen, Wilken-Jon
dc.contributor.authorHalvorsen, Elisabeth
dc.contributor.authorKwasniewski, Slawomir
dc.contributor.authorReigstad, Marit
dc.date.accessioned2018-10-12T11:25:32Z
dc.date.available2018-10-12T11:25:32Z
dc.date.issued2018-06-04
dc.description.abstractThe largest contribution of oceanic heat to the Arctic Ocean is the warm Atlantic Water (AW) inflow through the deep Fram Strait. The AW current also carries Atlantic plankton into the Arctic Basin and this inflow of zooplankton biomass through the Atlantic-Arctic gateway far exceeds the inflow through the shallow Pacific-Arctic gateway. However, because this transport has not yet been adequately quantified based on observational data, the present contribution is poorly defined, and future changes in Arctic zooplankton communities are difficult to project and observe. Our objective was to quantify the inflow of zooplankton biomass through the Fram Strait during different seasons, including winter. We collected data with high spatial resolution covering hydrography (CTD),currents (ADCP and LADCP) and zooplankton distributions (LOPC and MultiNet) from surface to 1,000 m depth along two transects crossing the AW inflow during three cruises in January, May and August 2014. Long-term variations (1997–2016) in the AW inflow were analyzed based on moored current meters. Water transport across the inflow region was of the same order of magnitude during all months (January 2.2 Sv, May 1.9 Sv, August 1.7 Sv). We found a higher variability in zooplankton transport between the months (January 51 kg C s<sup> −1 </sup>, May 34 kg C s<sup> −1 </sup>, August 50 kg C s<sup> −1</sup>), related to seasonal changes in the vertical distribution of zooplankton. However, high abundances of carbon-rich copepods were observed in the AW inflow during all months. Surface patches with high abundances of <i>C. finmarchicus</i>, <i>Microcalanus spp</i>., <i>Pseudocalanus spp</i>., and <i>Oithona similis</i> clearly contributed to the advected biomass, also in winter. The data reveal that the phenology of species is important for the amount of advected biomass, and that the advective input of zooplankton carbon into the Arctic Basin is important during all seasons. The advective zooplankton input might be especially important for mesopelagic planktivorous predators that were recently observed in the region, particularly during winter. The inflow of<i> C. finmarchicus</i> with AW was estimated to be in the order of 500,000 metric tons C y <sup>−1</sup> , which compares well to modeled estimates.en_US
dc.descriptionSource at: <a href=http://doi.org/10.3389/fmars.2018.00194> http://doi.org/10.3389/fmars.2018.00194 </a>en_US
dc.identifier.citationBasedow, S. L., Sundfjord, A., von Appen, W.-J., Halvorsen, H., Kwasniewski, S. & Reigstad, M. (2018) Seasonal variation in transport of zooplankton into the Arctic Basin through the Atlantic gateway, Fram Strait. Frontiers in Marine Science, 5(194). http://doi.org/10.3389/fmars.2018.00194en_US
dc.identifier.issn2296-7745
dc.identifier.otherFRIDAID 1587301
dc.identifier.other10.3389/fmars.2018.00194
dc.identifier.urihttp://hdl.handle.net/10037/13954
dc.language.isoengen_US
dc.publisherFrontiers Mediaen_US
dc.relation.journalFrontiers in Marine Science
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/POLARPRROG/226415/Norway/Bridging marine productivity regimes: How Atlantic advection affects productivity, carbon cycling and export in a melting Arctic Ocean//en_US
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497en_US
dc.title.alternativeSeasonal variation in transport of zooplankton into the Arctic Basin through the Atlantic gateway, Fram Straiten_US
dc.titleSeasonal variation in transport of zooplankton into the Arctic Basin through the Atlantic gateway, Fram Straiten_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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