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dc.contributor.authorNater, Chloe Rebecca
dc.contributor.authorEide, Nina Elisabeth
dc.contributor.authorPedersen, Åshild Ønvik
dc.contributor.authorYoccoz, Nigel
dc.contributor.authorFuglei, Eva
dc.date.accessioned2021-07-06T11:50:54Z
dc.date.available2021-07-06T11:50:54Z
dc.date.issued2021-06-21
dc.description.abstractClimate change has different and sometimes divergent effects on terrestrial and marine food webs, and in coastal ecosystems, these effects are tightly interlinked. Responses of opportunistic coastal predators and scavengers to climate change may thus be complex and potentially highly flexible, and can simultaneously serve as indicators of, and have profound impacts on, lower trophic levels. Gaining mechanistic understanding of these responses is therefore important, but often not feasible due to lack of longterm data from marked individuals. Here, we used a Bayesian integrated population model (IPM) to elucidate the effects of arctic warming and concurrent changes in terrestrial and marine resource availability on population dynamics of the opportunistic arctic fox (Vulpes lagopus) in Svalbard. Joint analysis of four types of data (den survey, age-at-harvest, placental scars, mark-recovery) revealed relatively stable population size and age structure over the last 22 yr (1997–2019) despite rapid environmental change linked to climate warming. This was related to the fact that terrestrial resources (reindeer carcasses, geese) became more abundant while the availability of marine resources (seal pups/carrion) decreased, and was driven by divergent trends in different vital rates (e.g., increased pregnancy rate but decreased pup survival). Balanced contributions of survival vs. reproduction and of immigration vs. local demography further stabilized population size. Our study thus sheds light on the mechanisms underlying population dynamics of opportunistic carnivores exploiting terrestrial and marine resources and suggests that exploitation of resources across different ecosystems can buffer predators against climate change. Additionally, it highlights the large potential of IPMs as tools to understand and predict the effects of environmental change on wildlife populations, even when data on marked individuals are sparse. arctic fox; cause-specific mortality; demography; harvest; immigration; integrated population model; marine resources; population dynamics; sea ice; terrestrial resources; transient life table response experimenten_US
dc.identifier.citationNater CR, Eide NE, Pedersen ÅØ, Yoccoz NG, Fuglei E. Contributions from terrestrial and marine resources stabilize predator populations in a rapidly changing climate. Ecosphere. 2021;12(6)en_US
dc.identifier.cristinIDFRIDAID 1917755
dc.identifier.doihttps://doi.org/10.1002/ecs2.3546
dc.identifier.issn2150-8925
dc.identifier.urihttps://hdl.handle.net/10037/21770
dc.language.isoengen_US
dc.publisherWileyen_US
dc.relation.journalEcosphere
dc.relation.projectIDNorges forskningsråd: 244647en_US
dc.relation.projectIDAndre: NMBUen_US
dc.relation.projectIDAndre: Climate-Ecological Observatory for Arctic Tundra (COAT)en_US
dc.relation.projectIDAndre: Norwegian Ministry of Environmenten_US
dc.relation.projectIDAndre: Norwegian Polar Instituteen_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/KLIMAFORSK/244647/Norway/Sustainable management of renewable resources in a changing environment: an integrated approach across ecosystems//en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2021 The Author(s)en_US
dc.subjectVDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480en_US
dc.subjectVDP::Mathematics and natural scienses: 400::Zoology and botany: 480en_US
dc.subjectFjellrev / Arctic foxen_US
dc.titleContributions from terrestrial and marine resources stabilize predator populations in a rapidly changing climateen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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