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dc.contributor.authorDe la Vega, C.
dc.contributor.authorMahaffey, C.
dc.contributor.authorTuerena, R.E.
dc.contributor.authorYurkowski, D.J.
dc.contributor.authorFerguson, S.H.
dc.contributor.authorStenson, G.B.
dc.contributor.authorNordøy, E.S.
dc.contributor.authorHaug, Tore
dc.contributor.authorBiuw, Martin
dc.contributor.authorSmout, S.
dc.contributor.authorHopkins, J.
dc.contributor.authorTagliabue, A.
dc.contributor.authorJeffreys, R.M.
dc.date.accessioned2020-12-15T12:04:44Z
dc.date.available2020-12-15T12:04:44Z
dc.date.created2020-12-01T14:28:26Z
dc.date.issued2020
dc.identifier.citationLimnology and Oceanography Letters. 2020, .en_US
dc.identifier.issn2378-2242
dc.identifier.urihttps://hdl.handle.net/11250/2719540
dc.description.abstractKnowledge of species trophic position (TP) is an essential component of ecosystem management. Determining TP from stable nitrogen isotopes (δ15N) in predators requires understanding how these tracers vary across environments and how they relate to predator isotope composition. We used two seal species as a model for determining TP across large spatial scales in the Arctic. δ15N in seawater nitrate (δ15NNO3) and seal muscle amino acids (δ15NAA) were determined to independently characterize the base of the food web and the TP of harp and ringed seals, demonstrating a direct link between δ15NNO3 and δ15NAA. Our results show that the spatial variation in δ15NAA in seals reflects the δ15NNO3 end members in Pacific vs. Atlantic waters. This study provides a reference for best practice on accurate comparison of TP in predators and as such, provides a framework to assess the impact of environmental and human‐induced changes on ecosystems at pan‐Arctic scales.en_US
dc.language.isoengen_US
dc.titleArctic seals as tracers of environmental and ecological change.en_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.source.pagenumber9en_US
dc.source.journalLimnology and Oceanography Lettersen_US
dc.identifier.doi10.1002/lol2.10176
dc.identifier.cristin1854861
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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