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dc.contributor.authorKatherina L., Schoo
dc.contributor.authorMaarten, Boersma
dc.contributor.authorMalzahn, Arne
dc.contributor.authorMartin G.J., Loeder
dc.contributor.authorKaren H., Wiltshire
dc.contributor.authorAberle-Malzahn, Nicole
dc.identifier.citationJournal of Sea Research. 2018, 141 61-70.nb_NO
dc.description.abstractA two-dimensional biomarker approach including fatty acids and stable isotopes of seston and copepods was applied to examine how the variability at the base of the food web affects trophic interactions between primary producers and copepod consumers over a sampling period of two years. We investigated how the composition of the seston affected feeding behaviour by analysing the fatty acid and stable isotope signals of the copepods Calanus helgolandicus, Acartia spp., Centropages spp. and Temora longicornis at Helgoland Roads, North Sea. Our results indicate that the relative contributions of autotrophic and heterotrophic fractions in the seston determined the stable isotope signal of the seston and hence the δ15N of copepods. Our findings show that the combination of stable isotope and fatty acid analyses provides an ideal tool to address the complexity of trophic relations in planktonic food-webs and to define relative trophic position and feeding preferences of e.g. copepods. Defining accurate baselines from bulk seston samples containing a mixture of auto- and heterotroph protist communities still remains a challenge when defining lower food-web dynamics in natural plankton communities.nb_NO
dc.description.abstractDietary and seasonal variability in trophic relations at the base of the North Sea pelagic food web revealed by stable isotope and fatty acid analysisnb_NO
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.subjectPlanktonic food webnb_NO
dc.subjectBaseline variationnb_NO
dc.subjectCopepod feedingnb_NO
dc.subjectLower food-web dynamicsnb_NO
dc.titleDietary and seasonal variability in trophic relations at the base of the North Sea pelagic food web revealed by stable isotope and fatty acid analysisnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.source.journalJournal of Sea Researchnb_NO
cristin.unitnameMiljø og nye ressurser

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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal