Mineralization and carbon turnover in subarctic heath soil as affected by warming and additional litter
Udgivelsesdato: December 2007 Arctic soil carbon (C) stocks are threatened by the rapidly advancing global warming. In addition to temperature, increasing amounts of leaf litter fall following from the expansion of deciduous shrubs and trees in northern ecosystems may alter biogeochemical cycling of...
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ftcopenhagenunip:oai:pure.atira.dk:publications/c03e11e0-2415-11de-9f0a-000ea68e967b 2023-12-17T10:25:50+01:00 Mineralization and carbon turnover in subarctic heath soil as affected by warming and additional litter Rinnan, Riikka Michelsen, Anders Baath, Erland Jonasson, Sven Evert 2007 https://curis.ku.dk/portal/da/publications/mineralization-and-carbon-turnover-in-subarctic-heath-soil-as-affected-by-warming-and-additional-litter(c03e11e0-2415-11de-9f0a-000ea68e967b).html https://doi.org/10.1016/j.soilbio.2007.05.035 eng eng info:eu-repo/semantics/restrictedAccess Rinnan , R , Michelsen , A , Baath , E & Jonasson , S E 2007 , ' Mineralization and carbon turnover in subarctic heath soil as affected by warming and additional litter ' , Soil Biology & Biochemistry , vol. 39 , no. 12 , pp. 3014-3023 . https://doi.org/10.1016/j.soilbio.2007.05.035 article 2007 ftcopenhagenunip https://doi.org/10.1016/j.soilbio.2007.05.035 2023-11-22T23:58:37Z Udgivelsesdato: December 2007 Arctic soil carbon (C) stocks are threatened by the rapidly advancing global warming. In addition to temperature, increasing amounts of leaf litter fall following from the expansion of deciduous shrubs and trees in northern ecosystems may alter biogeochemical cycling of C and nutrients. Our aim was to assess how factorial warming and litter addition in a long-term field experiment on a subarctic heath affect resource limitation of soil microbial communities (measured by thymidine and leucine incorporation techniques), net growing-season mineralization of nitrogen (N) and phosphorus (P), and carbon turnover (measured as changes in the pools during a growing-season-long field incubation of soil cores in situ ). The mainly N limited bacterial communities had shifted slightly towards limitation by C and P in response to seven growing seasons of warming. This and the significantly increased bacterial growth rate under warming may partly explain the observed higher C loss from the warmed soil. This is furthermore consistent with the less dramatic increase in the contents of dissolved organic carbon (DOC) and dissolved organic N (DON) in the warmed soil than in the soil from ambient temperature during the field incubation. The added litter did not affect the carbon content, but it was a source of nutrients to the soil, and it also tended to increase bacterial growth rate and net mineralization of P. The inorganic N pool decreased during the field incubation of soil cores, especially in the separate warming and litter addition treatments, while gross mineralized N was immobilized in the biomass of microbes and plants transplanted into the incubates soil cores, but without any significant effect of the treatments. The effects of warming plus litter addition on bacterial growth rates and of warming on C and N transformations during field incubation suggest that microbial activity is an important control on the carbon balance of arctic soils under climate change. Article in Journal/Newspaper Arctic Climate change Global warming Subarctic University of Copenhagen: Research Arctic Soil Biology and Biochemistry 39 12 3014 3023 |
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University of Copenhagen: Research |
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ftcopenhagenunip |
language |
English |
description |
Udgivelsesdato: December 2007 Arctic soil carbon (C) stocks are threatened by the rapidly advancing global warming. In addition to temperature, increasing amounts of leaf litter fall following from the expansion of deciduous shrubs and trees in northern ecosystems may alter biogeochemical cycling of C and nutrients. Our aim was to assess how factorial warming and litter addition in a long-term field experiment on a subarctic heath affect resource limitation of soil microbial communities (measured by thymidine and leucine incorporation techniques), net growing-season mineralization of nitrogen (N) and phosphorus (P), and carbon turnover (measured as changes in the pools during a growing-season-long field incubation of soil cores in situ ). The mainly N limited bacterial communities had shifted slightly towards limitation by C and P in response to seven growing seasons of warming. This and the significantly increased bacterial growth rate under warming may partly explain the observed higher C loss from the warmed soil. This is furthermore consistent with the less dramatic increase in the contents of dissolved organic carbon (DOC) and dissolved organic N (DON) in the warmed soil than in the soil from ambient temperature during the field incubation. The added litter did not affect the carbon content, but it was a source of nutrients to the soil, and it also tended to increase bacterial growth rate and net mineralization of P. The inorganic N pool decreased during the field incubation of soil cores, especially in the separate warming and litter addition treatments, while gross mineralized N was immobilized in the biomass of microbes and plants transplanted into the incubates soil cores, but without any significant effect of the treatments. The effects of warming plus litter addition on bacterial growth rates and of warming on C and N transformations during field incubation suggest that microbial activity is an important control on the carbon balance of arctic soils under climate change. |
format |
Article in Journal/Newspaper |
author |
Rinnan, Riikka Michelsen, Anders Baath, Erland Jonasson, Sven Evert |
spellingShingle |
Rinnan, Riikka Michelsen, Anders Baath, Erland Jonasson, Sven Evert Mineralization and carbon turnover in subarctic heath soil as affected by warming and additional litter |
author_facet |
Rinnan, Riikka Michelsen, Anders Baath, Erland Jonasson, Sven Evert |
author_sort |
Rinnan, Riikka |
title |
Mineralization and carbon turnover in subarctic heath soil as affected by warming and additional litter |
title_short |
Mineralization and carbon turnover in subarctic heath soil as affected by warming and additional litter |
title_full |
Mineralization and carbon turnover in subarctic heath soil as affected by warming and additional litter |
title_fullStr |
Mineralization and carbon turnover in subarctic heath soil as affected by warming and additional litter |
title_full_unstemmed |
Mineralization and carbon turnover in subarctic heath soil as affected by warming and additional litter |
title_sort |
mineralization and carbon turnover in subarctic heath soil as affected by warming and additional litter |
publishDate |
2007 |
url |
https://curis.ku.dk/portal/da/publications/mineralization-and-carbon-turnover-in-subarctic-heath-soil-as-affected-by-warming-and-additional-litter(c03e11e0-2415-11de-9f0a-000ea68e967b).html https://doi.org/10.1016/j.soilbio.2007.05.035 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Global warming Subarctic |
genre_facet |
Arctic Climate change Global warming Subarctic |
op_source |
Rinnan , R , Michelsen , A , Baath , E & Jonasson , S E 2007 , ' Mineralization and carbon turnover in subarctic heath soil as affected by warming and additional litter ' , Soil Biology & Biochemistry , vol. 39 , no. 12 , pp. 3014-3023 . https://doi.org/10.1016/j.soilbio.2007.05.035 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.soilbio.2007.05.035 |
container_title |
Soil Biology and Biochemistry |
container_volume |
39 |
container_issue |
12 |
container_start_page |
3014 |
op_container_end_page |
3023 |
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1785577507445014528 |