Organic matter chemistry controls greenhouse gas emissions from permafrost peatlands
Large tracts of arctic and subarctic peatlands are underlain by permafrost. These peatlands store large quantities of carbon (C), and are currently under severe threat from climate change. The aim of this study was to determine the size and organic chemistry of the easily degradable C pool in permaf...
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Online Access: | https://doi.org/10.1016/j.soilbio.2016.03.016 https://nottingham-repository.worktribe.com/file/792475/1/Sjogersten%20et%20al.%202016%20SBB%20second%20revision_Final.pdf https://nottingham-repository.worktribe.com/output/792475 |
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ftunnottinghamrr:oai:nottingham-repository.worktribe.com:792475 2023-05-15T15:00:35+02:00 Organic matter chemistry controls greenhouse gas emissions from permafrost peatlands Caul, S. Daniell, T.J. Jurd, A.P.S. O'Sullivan, O.S. Stapleton, C.S. Titman, Jeremy J. 2016-04-09 https://doi.org/10.1016/j.soilbio.2016.03.016 https://nottingham-repository.worktribe.com/file/792475/1/Sjogersten%20et%20al.%202016%20SBB%20second%20revision_Final.pdf https://nottingham-repository.worktribe.com/output/792475 unknown Elsevier https://nottingham-repository.worktribe.com/output/792475 Soil Biology and Biochemistry Volume 98 doi:https://doi.org/10.1016/j.soilbio.2016.03.016 https://nottingham-repository.worktribe.com/file/792475/1/Sjogersten%20et%20al.%202016%20SBB%20second%20revision_Final.pdf 0038-0717 doi:10.1016/j.soilbio.2016.03.016 openAccess ¹³C solid-state NMR Carbon dioxide Climate change Methane Microbial Permafrost peatland Journal Article 2016 ftunnottinghamrr https://doi.org/10.1016/j.soilbio.2016.03.016 2022-10-13T22:09:02Z Large tracts of arctic and subarctic peatlands are underlain by permafrost. These peatlands store large quantities of carbon (C), and are currently under severe threat from climate change. The aim of this study was to determine the size and organic chemistry of the easily degradable C pool in permafrost peatlands and link the functional organic chemistry to temperature and moisture controls of greenhouse gas emissions. First, we used a combination of field measurements and laboratory experiments to assess the influence of increased temperature and flooding on CO₂ and CH₄ emissions from sixteen permafrost peatlands in subarctic Sweden and Canada. Second, we determined the variation in organic matter chemistry and the associated microbial community composition of the peat active layer, with depth using quantitative ¹³C solid-state NMR and molecular biomarkers respectively. We demonstrate that the peat organic chemistry strongly controls CO₂ release from peat and that ca. 35 and 26% of the peat organic matter, at the Swedish and Canadian peatlands sites, respectively, is easily degradable by heterotrophic microorganisms. In contrast to CO₂, CH₄ emissions were decoupled from peat functional organic chemistry. We show a strong relationship between the microbial community structure and the peat organic chemistry suggesting that substrate type and abundance is an important driver of microbial composition in sub-arctic peatlands. Despite considerable variation in peat chemistry and microbial community composition with depth the temperature sensitivity was comparable throughout the active layer. Our study shows that functional organic chemistry controls both soil respiration rates and the composition of the microbial community. Furthermore, if these peatlands collapse and flood on thawing, they are unlikely to become large emitters of CH₄ without additional input of labile substrates. Article in Journal/Newspaper Arctic Climate change permafrost Subarctic University of Nottingham: Repository@Nottingham Arctic Canada Soil Biology and Biochemistry 98 42 53 |
institution |
Open Polar |
collection |
University of Nottingham: Repository@Nottingham |
op_collection_id |
ftunnottinghamrr |
language |
unknown |
topic |
¹³C solid-state NMR Carbon dioxide Climate change Methane Microbial Permafrost peatland |
spellingShingle |
¹³C solid-state NMR Carbon dioxide Climate change Methane Microbial Permafrost peatland Caul, S. Daniell, T.J. Jurd, A.P.S. O'Sullivan, O.S. Stapleton, C.S. Titman, Jeremy J. Organic matter chemistry controls greenhouse gas emissions from permafrost peatlands |
topic_facet |
¹³C solid-state NMR Carbon dioxide Climate change Methane Microbial Permafrost peatland |
description |
Large tracts of arctic and subarctic peatlands are underlain by permafrost. These peatlands store large quantities of carbon (C), and are currently under severe threat from climate change. The aim of this study was to determine the size and organic chemistry of the easily degradable C pool in permafrost peatlands and link the functional organic chemistry to temperature and moisture controls of greenhouse gas emissions. First, we used a combination of field measurements and laboratory experiments to assess the influence of increased temperature and flooding on CO₂ and CH₄ emissions from sixteen permafrost peatlands in subarctic Sweden and Canada. Second, we determined the variation in organic matter chemistry and the associated microbial community composition of the peat active layer, with depth using quantitative ¹³C solid-state NMR and molecular biomarkers respectively. We demonstrate that the peat organic chemistry strongly controls CO₂ release from peat and that ca. 35 and 26% of the peat organic matter, at the Swedish and Canadian peatlands sites, respectively, is easily degradable by heterotrophic microorganisms. In contrast to CO₂, CH₄ emissions were decoupled from peat functional organic chemistry. We show a strong relationship between the microbial community structure and the peat organic chemistry suggesting that substrate type and abundance is an important driver of microbial composition in sub-arctic peatlands. Despite considerable variation in peat chemistry and microbial community composition with depth the temperature sensitivity was comparable throughout the active layer. Our study shows that functional organic chemistry controls both soil respiration rates and the composition of the microbial community. Furthermore, if these peatlands collapse and flood on thawing, they are unlikely to become large emitters of CH₄ without additional input of labile substrates. |
format |
Article in Journal/Newspaper |
author |
Caul, S. Daniell, T.J. Jurd, A.P.S. O'Sullivan, O.S. Stapleton, C.S. Titman, Jeremy J. |
author_facet |
Caul, S. Daniell, T.J. Jurd, A.P.S. O'Sullivan, O.S. Stapleton, C.S. Titman, Jeremy J. |
author_sort |
Caul, S. |
title |
Organic matter chemistry controls greenhouse gas emissions from permafrost peatlands |
title_short |
Organic matter chemistry controls greenhouse gas emissions from permafrost peatlands |
title_full |
Organic matter chemistry controls greenhouse gas emissions from permafrost peatlands |
title_fullStr |
Organic matter chemistry controls greenhouse gas emissions from permafrost peatlands |
title_full_unstemmed |
Organic matter chemistry controls greenhouse gas emissions from permafrost peatlands |
title_sort |
organic matter chemistry controls greenhouse gas emissions from permafrost peatlands |
publisher |
Elsevier |
publishDate |
2016 |
url |
https://doi.org/10.1016/j.soilbio.2016.03.016 https://nottingham-repository.worktribe.com/file/792475/1/Sjogersten%20et%20al.%202016%20SBB%20second%20revision_Final.pdf https://nottingham-repository.worktribe.com/output/792475 |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic Climate change permafrost Subarctic |
genre_facet |
Arctic Climate change permafrost Subarctic |
op_relation |
https://nottingham-repository.worktribe.com/output/792475 Soil Biology and Biochemistry Volume 98 doi:https://doi.org/10.1016/j.soilbio.2016.03.016 https://nottingham-repository.worktribe.com/file/792475/1/Sjogersten%20et%20al.%202016%20SBB%20second%20revision_Final.pdf 0038-0717 doi:10.1016/j.soilbio.2016.03.016 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1016/j.soilbio.2016.03.016 |
container_title |
Soil Biology and Biochemistry |
container_volume |
98 |
container_start_page |
42 |
op_container_end_page |
53 |
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1766332671604031488 |