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dc.contributor.authorRenaud, Paul Eric
dc.contributor.authorDaase, Malin
dc.contributor.authorBanas, Neil
dc.contributor.authorGabrielsen, Tove M.
dc.contributor.authorSøreide, Janne
dc.contributor.authorVarpe, Øystein
dc.contributor.authorCottier, Finlo Robert
dc.contributor.authorFalk-Petersen, Stig
dc.contributor.authorHalsband, Claudia
dc.contributor.authorVogedes, Daniel Ludwig
dc.contributor.authorHeggland, Kristin
dc.contributor.authorBerge, Jørgen
dc.date.accessioned2019-01-25T11:34:42Z
dc.date.available2019-01-25T11:34:42Z
dc.date.issued2018-06-27
dc.description.abstractArctic marine ecosystems support fisheries of significant and increasing economic and nutritional value. Commercial stocks are sustained by pelagic food webs with relatively few keystone taxa mediating energy transfer to higher trophic levels, and it remains largely unknown how these taxa will be affected by changing climate and the influx of boreal taxa. <i>Calanus</i> species store large quantities of lipids, making these zooplankton a critical link in marine food-webs. The Arctic <i>Calanus</i> species are usually larger and, importantly, have been suggested to contain disproportionately larger lipid stores than their boreal congeners. Continued climate warming and subsequent changes in primary production regimes have been predicted to lead to a shift from the larger, lipid-rich Arctic species, <i>Calanus glacialis</i> and <i>Calanus hyperboreus</i>, toward the smaller, boreal <i>Calanus finmarchicus</i> in the European Arctic, with negative consequences for top predators. Our data show that lipid content is closely related to body size for all three species, i.e. is not a species-specific trait, and that there is considerable overlap in size between <i>C. finmarchicus</i> and <i>C. glacialis</i>. A trait-based life-history model was used to examine an idealized scenario where, in a changed Arctic with a longer period of primary production, <i>C. glacialis</i>- and <i>C. hyperboreus</i>-like copepods are indeed replaced by <i>C. finmarchicus</i>-like individuals, whether through competition, plasticity, hybridization, or evolution. However, the model finds that transfer of energy from primary producers to higher predators may actually be more efficient in this future scenario, because of the changes in generation length and population turnover rate that accompany the body-size shifts. These findings suggest that Arctic marine food webs may be more resilient to climate-related shifts in the <i>Calanus</i> complex than previously assumed.en_US
dc.description.sponsorshipPolish-Norwegian Research Programme Institute of Oceanology Polish Academy of Sciences US National Science Foundation UK Natural Environment Research Councilen_US
dc.descriptionThis is a pre-copyedited, author-produced version of an article accepted for publication in <i>ICES Journal of Marine Science</i> following peer review. The version of record Renaud, P.E., Daase, M., Banas, N.S., Gabrielsen, T.M., Søreide, J.E., Varpe, Ø., ... Berge, J. (2018). Pelagic food-webs in a changing Arctic: a trait-based perspective suggests a mode of resilience. <i>ICES Journal of Marine Science</i>, is available online at: <a href=https://doi.org/10.1093/icesjms/fsy063> https://doi.org/10.1093/icesjms/fsy063</a>.en_US
dc.identifier.citationRenaud, P.E., Daase, M., Banas, N.S., Gabrielsen, T.M., Søreide, J.E., Varpe, Ø., ... Berge, J. (2018). Pelagic food-webs in a changing Arctic: a trait-based perspective suggests a mode of resilience. <i>ICES Journal of Marine Science</i>. https://doi.org/10.1093/icesjms/fsy063en_US
dc.identifier.cristinIDFRIDAID 1618897
dc.identifier.doi10.1093/icesjms/fsy063
dc.identifier.issn1054-3139
dc.identifier.issn1095-9289
dc.identifier.urihttps://hdl.handle.net/10037/14535
dc.language.isoengen_US
dc.publisherOxford University Press (OUP)en_US
dc.relation.journalICES Journal of Marine Science
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/POLARPROG/226417/Norway/Mare incognitum - ecological processes during the polar night//en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/POLARPROG/244319/Norway/Arctic Ocean ecosystems - Applied technology, Biological interactions and Consequences in an era of abrupt climate change//en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/SFF/223254/Norway/Centre for Autonomous Marine Operations and Systems/AMOS/en_US
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480en_US
dc.titlePelagic food-webs in a changing Arctic: a trait-based perspective suggests a mode of resilienceen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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