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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.accessioned2020-12-04T09:20:04Z
dc.date.available2020-12-04T09:20:04Z
dc.date.issued2020-11-12
dc.description.abstractKnowledge of species trophic position (TP) is an essential component of ecosystem management. Determining TP from stable nitrogen isotopes (δ<sup>15</sup>N) 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. δ<sup>15</sup>N in seawater nitrate (δ<sup>15</sup>N<sub>NO3</sub>) and seal muscle amino acids (δ<sup>15</sup>N<sub>AA</sub>) were determined to independently characterize the base of the food web and the TP of harp and ringed seals, demonstrating a direct link between δ<sup>15</sup>N<sub>NO3</sub> and δ<sup>15</sup>N<sub>AA</sub>. Our results show that the spatial variation in δ<sup>15</sup>N<sub>AA</sub> in seals reflects the δ<sup>15</sup>N<sub>NO3</sub> 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.identifier.citationDe la Vega C, Mahaffey, Tuerena, Yurkowski, Ferguson S, Stenson, Nordøy E, Haug t, Biuw EM, Smout, Hopkins, Tagliabue, Jeffreys. Arctic seals as tracers of environmental and ecological change. . Limnology and Oceanography Letters. 2020en_US
dc.identifier.cristinIDFRIDAID 1854861
dc.identifier.doi10.1002/lol2.10176
dc.identifier.issn2378-2242
dc.identifier.urihttps://hdl.handle.net/10037/19985
dc.language.isoengen_US
dc.publisherWileyen_US
dc.relation.journalLimnology and Oceanography Letters
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2020 The Author(s)en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450en_US
dc.titleArctic seals as tracers of environmental and ecological changeen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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