Consequences of warming on tundra carbon balance determined by reindeer grazing history
Arctic tundra currently stores half of the global soil carbon (C) stock1. Climate warming in the Arctic may lead to accelerated CO2 release through enhanced decomposition and turn Arctic ecosystems from a net C sink into a net C source, if warming enhances decomposition more than plant photosynthesi...
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Online Access: | https://doi.org/10.1038/NCLIMATE2147 https://nottingham-repository.worktribe.com/output/1114234 |
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ftunnottinghamrr:oai:nottingham-repository.worktribe.com:1114234 2023-05-15T14:42:10+02:00 Consequences of warming on tundra carbon balance determined by reindeer grazing history Crout, Neil Olofsson, Johan Stark, Sari 2014-03-16 https://doi.org/10.1038/NCLIMATE2147 https://nottingham-repository.worktribe.com/output/1114234 unknown Nature Publishing Group https://nottingham-repository.worktribe.com/output/1114234 Volume 4 Pagination 384-388 doi:https://doi.org/10.1038/NCLIMATE2147 1758-678X doi:10.1038/NCLIMATE2147 Journal Article 2014 ftunnottinghamrr https://doi.org/10.1038/NCLIMATE2147 2022-10-13T22:12:02Z Arctic tundra currently stores half of the global soil carbon (C) stock1. Climate warming in the Arctic may lead to accelerated CO2 release through enhanced decomposition and turn Arctic ecosystems from a net C sink into a net C source, if warming enhances decomposition more than plant photosynthesis2. A large portion of the circumpolar Arctic is grazed by reindeer/caribou, and grazing causes important vegetation shifts in the long-term. Using a unique experimental set-up, where areas experiencing more than 50 years of either light (LG) or heavy (HG) grazing were warmed and/or fertilized, we show that under ambient conditions areas under LG were a 70% stronger C sink than HG areas. Although warming decreased the C sink by 38% under LG, it had no effect under HG. Grazing history will thus be an important determinant in the response of ecosystem C balance to climate warming, which at present is not taken into account in climate change models. Article in Journal/Newspaper Arctic Climate change Tundra University of Nottingham: Repository@Nottingham Arctic Nature Climate Change 4 5 384 388 |
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University of Nottingham: Repository@Nottingham |
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Arctic tundra currently stores half of the global soil carbon (C) stock1. Climate warming in the Arctic may lead to accelerated CO2 release through enhanced decomposition and turn Arctic ecosystems from a net C sink into a net C source, if warming enhances decomposition more than plant photosynthesis2. A large portion of the circumpolar Arctic is grazed by reindeer/caribou, and grazing causes important vegetation shifts in the long-term. Using a unique experimental set-up, where areas experiencing more than 50 years of either light (LG) or heavy (HG) grazing were warmed and/or fertilized, we show that under ambient conditions areas under LG were a 70% stronger C sink than HG areas. Although warming decreased the C sink by 38% under LG, it had no effect under HG. Grazing history will thus be an important determinant in the response of ecosystem C balance to climate warming, which at present is not taken into account in climate change models. |
format |
Article in Journal/Newspaper |
author |
Crout, Neil Olofsson, Johan Stark, Sari |
spellingShingle |
Crout, Neil Olofsson, Johan Stark, Sari Consequences of warming on tundra carbon balance determined by reindeer grazing history |
author_facet |
Crout, Neil Olofsson, Johan Stark, Sari |
author_sort |
Crout, Neil |
title |
Consequences of warming on tundra carbon balance determined by reindeer grazing history |
title_short |
Consequences of warming on tundra carbon balance determined by reindeer grazing history |
title_full |
Consequences of warming on tundra carbon balance determined by reindeer grazing history |
title_fullStr |
Consequences of warming on tundra carbon balance determined by reindeer grazing history |
title_full_unstemmed |
Consequences of warming on tundra carbon balance determined by reindeer grazing history |
title_sort |
consequences of warming on tundra carbon balance determined by reindeer grazing history |
publisher |
Nature Publishing Group |
publishDate |
2014 |
url |
https://doi.org/10.1038/NCLIMATE2147 https://nottingham-repository.worktribe.com/output/1114234 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Tundra |
genre_facet |
Arctic Climate change Tundra |
op_relation |
https://nottingham-repository.worktribe.com/output/1114234 Volume 4 Pagination 384-388 doi:https://doi.org/10.1038/NCLIMATE2147 1758-678X doi:10.1038/NCLIMATE2147 |
op_doi |
https://doi.org/10.1038/NCLIMATE2147 |
container_title |
Nature Climate Change |
container_volume |
4 |
container_issue |
5 |
container_start_page |
384 |
op_container_end_page |
388 |
_version_ |
1766313872473456640 |