dc.contributor.author | Fauchald, Per | |
dc.contributor.author | Park, Taejin | |
dc.contributor.author | Tømmervik, Hans | |
dc.contributor.author | Myneni, Ranga B. | |
dc.contributor.author | Hausner, Vera Helene | |
dc.coverage.spatial | Arctic North America | nb_NO |
dc.date.accessioned | 2017-05-03T13:20:52Z | |
dc.date.available | 2017-05-03T13:20:52Z | |
dc.date.created | 2017-04-27T13:38:11Z | |
dc.date.issued | 2017 | |
dc.identifier.issn | 2375-2548 | |
dc.identifier.uri | http://hdl.handle.net/11250/2441571 | |
dc.description.abstract | Themigratory tundra caribou herds in North America follow decadal population cycles, and browsing from abundant caribou could be expected to counteract the current climate-driven expansion of shrubs in the circumpolar tundra
biome. We demonstrate that the sea ice cover in the Arctic Ocean has provided a strong signal for climate-induced changes on the adjacent caribou summer ranges, outperforming other climate indices in explaining the caribou-plant dynamics. We found no evidence of a negative effect of caribou abundance on vegetation biomass. On the contrary, we found a strong bottom-up effect in which a warmer climate related to diminishing sea ice has increased the plant biomass on the summer pastures, along with a paradoxical decline in caribou populations. This result suggests that this climate-induced greening has been accompanied by a deterioration of pasture quality. The shrub expansion in Arctic North America involves plant species with strong antibrowsing defenses.Our resultsmight therefore be an early signal of a climate-driven shift in the caribou-plant interaction from a system with low plant biomass modulated by cyclic caribou populations to a system dominated by nonedible shrubs and diminishing herds of migratory caribou. | nb_NO |
dc.language.iso | eng | nb_NO |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no | * |
dc.title | Arctic greening from warming promotes declines in caribou populations | nb_NO |
dc.type | Journal article | nb_NO |
dc.type | Peer reviewed | nb_NO |
dc.subject.nsi | VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 | nb_NO |
dc.source.volume | 3 | nb_NO |
dc.source.journal | Science Advances | nb_NO |
dc.source.issue | 4 | nb_NO |
dc.identifier.doi | https://doi.org/10.1126/sciadv.1601365 | |
dc.identifier.cristin | 1466939 | |
dc.relation.project | Norges forskningsråd: 192040 ; Norges forskningsråd: 247474 | nb_NO |
cristin.unitcode | 7511,0,0,0 | |
cristin.unitcode | 7511,4,0,0 | |
cristin.unitname | Norsk institutt for naturforskning | |
cristin.unitname | Tromsø | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |