Arctic greening from warming promotes declines in caribou populations
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 provid...
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Online Access: | http://hdl.handle.net/11250/2441571 https://doi.org/10.1126/sciadv.1601365 |
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ftninstnf:oai:brage.nina.no:11250/2441571 2023-05-15T14:31:25+02:00 Arctic greening from warming promotes declines in caribou populations Fauchald, Per Park, Taejin Tømmervik, Hans Myneni, Ranga B. Hausner, Vera Helene Arctic North America 2017 application/pdf http://hdl.handle.net/11250/2441571 https://doi.org/10.1126/sciadv.1601365 eng eng Norges forskningsråd: 192040 Norges forskningsråd: 247474 urn:issn:2375-2548 http://hdl.handle.net/11250/2441571 https://doi.org/10.1126/sciadv.1601365 cristin:1466939 Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no CC-BY-NC-ND 3 Science Advances 4 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 Journal article Peer reviewed 2017 ftninstnf https://doi.org/10.1126/sciadv.1601365 2021-12-23T07:17:06Z 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. Article in Journal/Newspaper Arctic Greening Arctic Arctic Ocean Sea ice Tundra Norwegian Institute for Nature Research: Brage NINA Arctic Arctic Ocean Science Advances 3 4 |
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Norwegian Institute for Nature Research: Brage NINA |
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English |
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VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 |
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VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 Fauchald, Per Park, Taejin Tømmervik, Hans Myneni, Ranga B. Hausner, Vera Helene Arctic greening from warming promotes declines in caribou populations |
topic_facet |
VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Fauchald, Per Park, Taejin Tømmervik, Hans Myneni, Ranga B. Hausner, Vera Helene |
author_facet |
Fauchald, Per Park, Taejin Tømmervik, Hans Myneni, Ranga B. Hausner, Vera Helene |
author_sort |
Fauchald, Per |
title |
Arctic greening from warming promotes declines in caribou populations |
title_short |
Arctic greening from warming promotes declines in caribou populations |
title_full |
Arctic greening from warming promotes declines in caribou populations |
title_fullStr |
Arctic greening from warming promotes declines in caribou populations |
title_full_unstemmed |
Arctic greening from warming promotes declines in caribou populations |
title_sort |
arctic greening from warming promotes declines in caribou populations |
publishDate |
2017 |
url |
http://hdl.handle.net/11250/2441571 https://doi.org/10.1126/sciadv.1601365 |
op_coverage |
Arctic North America |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Greening Arctic Arctic Ocean Sea ice Tundra |
genre_facet |
Arctic Greening Arctic Arctic Ocean Sea ice Tundra |
op_source |
3 Science Advances 4 |
op_relation |
Norges forskningsråd: 192040 Norges forskningsråd: 247474 urn:issn:2375-2548 http://hdl.handle.net/11250/2441571 https://doi.org/10.1126/sciadv.1601365 cristin:1466939 |
op_rights |
Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1126/sciadv.1601365 |
container_title |
Science Advances |
container_volume |
3 |
container_issue |
4 |
_version_ |
1766305056754237440 |