Degradation changes stable carbon isotope depth profiles in palsa peatlands
Palsa peatlands are a significant carbon pool in the global carbon cycle and are projected to change by global warming due to accelerated permafrost thaw. Our aim was to use stable carbon isotopes as indicators of palsa degradation. Depth profiles of stable carbon isotopes generally reflect organic...
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Copernicus Publications
2014
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00019652 2023-05-15T17:44:49+02:00 Degradation changes stable carbon isotope depth profiles in palsa peatlands Krüger, J. P. Leifeld, J. Alewell, C. 2014-06 electronic https://doi.org/10.5194/bg-11-3369-2014 https://noa.gwlb.de/receive/cop_mods_00019652 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00019607/bg-11-3369-2014.pdf https://bg.copernicus.org/articles/11/3369/2014/bg-11-3369-2014.pdf eng eng Copernicus Publications Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-11-3369-2014 https://noa.gwlb.de/receive/cop_mods_00019652 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00019607/bg-11-3369-2014.pdf https://bg.copernicus.org/articles/11/3369/2014/bg-11-3369-2014.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2014 ftnonlinearchiv https://doi.org/10.5194/bg-11-3369-2014 2022-02-08T22:52:33Z Palsa peatlands are a significant carbon pool in the global carbon cycle and are projected to change by global warming due to accelerated permafrost thaw. Our aim was to use stable carbon isotopes as indicators of palsa degradation. Depth profiles of stable carbon isotopes generally reflect organic matter dynamics in soils with an increase of δ13C values during aerobic decomposition and stable or decreasing δ13C values with depth during anaerobic decomposition. Stable carbon isotope depth profiles of undisturbed and degraded sites of hummocks as well as hollows at three palsa peatlands in northern Sweden were used to investigate the degradation processes. The depth patterns of stable isotopes clearly differ between intact and degraded hummocks at all sites. Erosion and cryoturbation at the degraded sites significantly changes the stable carbon isotope depth profiles. At the intact hummocks the uplifting of peat material by permafrost is indicated by a turning in the δ13C depth trend, and this assessment is supported by a change in the C / N ratios. For hollows isotope patterns were less clear, but some hollows and degraded hollows in the palsa peatlands show differences in their stable carbon isotope depth profiles indicating enhanced degradation rates. We conclude that the degradation of palsa peatlands by accelerated permafrost thawing can be identified with stable carbon isotope depth profiles. At intact hummocks δ13C depth patterns display the uplifting of peat material by a change in peat decomposition processes. Article in Journal/Newspaper Northern Sweden palsa permafrost Niedersächsisches Online-Archiv NOA Biogeosciences 11 12 3369 3380 |
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Niedersächsisches Online-Archiv NOA |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Krüger, J. P. Leifeld, J. Alewell, C. Degradation changes stable carbon isotope depth profiles in palsa peatlands |
topic_facet |
article Verlagsveröffentlichung |
description |
Palsa peatlands are a significant carbon pool in the global carbon cycle and are projected to change by global warming due to accelerated permafrost thaw. Our aim was to use stable carbon isotopes as indicators of palsa degradation. Depth profiles of stable carbon isotopes generally reflect organic matter dynamics in soils with an increase of δ13C values during aerobic decomposition and stable or decreasing δ13C values with depth during anaerobic decomposition. Stable carbon isotope depth profiles of undisturbed and degraded sites of hummocks as well as hollows at three palsa peatlands in northern Sweden were used to investigate the degradation processes. The depth patterns of stable isotopes clearly differ between intact and degraded hummocks at all sites. Erosion and cryoturbation at the degraded sites significantly changes the stable carbon isotope depth profiles. At the intact hummocks the uplifting of peat material by permafrost is indicated by a turning in the δ13C depth trend, and this assessment is supported by a change in the C / N ratios. For hollows isotope patterns were less clear, but some hollows and degraded hollows in the palsa peatlands show differences in their stable carbon isotope depth profiles indicating enhanced degradation rates. We conclude that the degradation of palsa peatlands by accelerated permafrost thawing can be identified with stable carbon isotope depth profiles. At intact hummocks δ13C depth patterns display the uplifting of peat material by a change in peat decomposition processes. |
format |
Article in Journal/Newspaper |
author |
Krüger, J. P. Leifeld, J. Alewell, C. |
author_facet |
Krüger, J. P. Leifeld, J. Alewell, C. |
author_sort |
Krüger, J. P. |
title |
Degradation changes stable carbon isotope depth profiles in palsa peatlands |
title_short |
Degradation changes stable carbon isotope depth profiles in palsa peatlands |
title_full |
Degradation changes stable carbon isotope depth profiles in palsa peatlands |
title_fullStr |
Degradation changes stable carbon isotope depth profiles in palsa peatlands |
title_full_unstemmed |
Degradation changes stable carbon isotope depth profiles in palsa peatlands |
title_sort |
degradation changes stable carbon isotope depth profiles in palsa peatlands |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/bg-11-3369-2014 https://noa.gwlb.de/receive/cop_mods_00019652 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00019607/bg-11-3369-2014.pdf https://bg.copernicus.org/articles/11/3369/2014/bg-11-3369-2014.pdf |
genre |
Northern Sweden palsa permafrost |
genre_facet |
Northern Sweden palsa permafrost |
op_relation |
Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-11-3369-2014 https://noa.gwlb.de/receive/cop_mods_00019652 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00019607/bg-11-3369-2014.pdf https://bg.copernicus.org/articles/11/3369/2014/bg-11-3369-2014.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-11-3369-2014 |
container_title |
Biogeosciences |
container_volume |
11 |
container_issue |
12 |
container_start_page |
3369 |
op_container_end_page |
3380 |
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1766147110698221568 |