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dc.contributor.authorSt. John Glew, Katie
dc.contributor.authorEspinasse, Boris
dc.contributor.authorHunt, Brian P. V.
dc.contributor.authorPakhomov, Evgeny A.
dc.contributor.authorBury, Sarah J.
dc.contributor.authorPinkerton, Matt
dc.contributor.authorNodder, Scott D.
dc.contributor.authorGutiérrez-Rodríguez, Andres
dc.contributor.authorSafi, Karl
dc.contributor.authorBrown, Julie C. S.
dc.contributor.authorGraham, Laura
dc.contributor.authorDunbar, Robert
dc.contributor.authorMucciarone, David A.
dc.contributor.authorMagozzi, Sarah
dc.contributor.authorSomes, Chris
dc.contributor.authorTrueman, Clive N.
dc.date.accessioned2021-11-24T12:24:52Z
dc.date.available2021-11-24T12:24:52Z
dc.date.issued2021-08-30
dc.description.abstractPolar marine ecosystems are particularly vulnerable to the effects of climate change. Warming temperatures, freshening seawater, and disruption to sea-ice formation potentially all have cascading effects on food webs. New approaches are needed to better understand spatiotemporal interactions among biogeochemical processes at the base of Southern Ocean food webs. In marine systems, isoscapes (models of the spatial variation in the stable isotopic composition) of carbon and nitrogen have proven useful in identifying spatial variation in a range of biogeochemical processes, such as nutrient utilization by phytoplankton. Isoscapes provide a baseline for interpreting stable isotope compositions of higher trophic level animals in movement, migration, and diet research. Here, we produce carbon and nitrogen isoscapes across the entire Southern Ocean (>40°S) using surface particulate organic matter isotope data, collected over the past 50 years. We use Integrated Nested Laplace Approximation-based approaches to predict mean annual isoscapes and four seasonal isoscapes using a suite of environmental data as predictor variables. Clear spatial gradients in δ13C and δ15N values were predicted across the Southern Ocean, consistent with previous statistical and mechanistic views of isotopic variability in this region. We identify strong seasonal variability in both carbon and nitrogen isoscapes, with key implications for the use of static or annual average isoscape baselines in animal studies attempting to document seasonal migratory or foraging behaviors.en_US
dc.identifier.citationSt. John Glew, Espinasse, Hunt, Pakhomov, Bury, Pinkerton, Nodder, Gutiérrez-Rodríguez, Safi, Brown, Graham, Dunbar, Mucciarone, Magozzi, Somes, Trueman. Isoscape Models of the Southern Ocean: Predicting Spatial and Temporal Variability in Carbon and Nitrogen Isotope Compositions of Particulate Organic Matter. Global Biogeochemical Cycles. 2021;35(9)en_US
dc.identifier.cristinIDFRIDAID 1945671
dc.identifier.doi10.1029/2020GB006901
dc.identifier.issn0886-6236
dc.identifier.issn1944-9224
dc.identifier.urihttps://hdl.handle.net/10037/23152
dc.language.isoengen_US
dc.publisherWileyen_US
dc.relation.journalGlobal Biogeochemical Cycles
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/ISOMOD/894296/Norway/Modeling Prey Isocapes in the North Atlantic for Advancement in Predator Ecology//en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2021 The Author(s)en_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.titleIsoscape Models of the Southern Ocean: Predicting Spatial and Temporal Variability in Carbon and Nitrogen Isotope Compositions of Particulate Organic Matteren_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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