Stability and biodegradability of organic matter from Arctic soils of Western Siberia: insights from 13 C-NMR spectroscopy and elemental analysis
Arctic soils contain large amounts of organic matter which, globally, exceed the amount of carbon stored in vegetation biomass and in the atmosphere. Recent studies emphasise the potential sensitivity for this soil organic matter (SOM) to be mineralised when faced with increasing ambient temperature...
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ftdoajarticles:oai:doaj.org/article:22362c2b91844cf5856d7aa7a06209a6 2023-05-15T14:55:34+02:00 Stability and biodegradability of organic matter from Arctic soils of Western Siberia: insights from 13 C-NMR spectroscopy and elemental analysis E. Ejarque E. Abakumov 2016-01-01T00:00:00Z https://doi.org/10.5194/se-7-153-2016 https://doaj.org/article/22362c2b91844cf5856d7aa7a06209a6 EN eng Copernicus Publications http://www.solid-earth.net/7/153/2016/se-7-153-2016.pdf https://doaj.org/toc/1869-9510 https://doaj.org/toc/1869-9529 1869-9510 1869-9529 doi:10.5194/se-7-153-2016 https://doaj.org/article/22362c2b91844cf5856d7aa7a06209a6 Solid Earth, Vol 7, Iss 1, Pp 153-165 (2016) Geology QE1-996.5 Stratigraphy QE640-699 article 2016 ftdoajarticles https://doi.org/10.5194/se-7-153-2016 2022-12-31T00:10:39Z Arctic soils contain large amounts of organic matter which, globally, exceed the amount of carbon stored in vegetation biomass and in the atmosphere. Recent studies emphasise the potential sensitivity for this soil organic matter (SOM) to be mineralised when faced with increasing ambient temperatures. In order to better refine the predictions about the response of SOM to climate warming, there is a need to increase the spatial coverage of empirical data on SOM quantity and quality in the Arctic area. This study provides, for the first time, a characterisation of SOM from the Gydan Peninsula in the Yamal Region, Western Siberia, Russia. On the one hand, soil humic acids and their humification state were characterised by measuring the elemental composition and diversity of functional groups using solid-state 13 C-nuclear magnetic resonance (NMR) spectroscopy. Also, the total mineralisable carbon was measured. Our results indicate that there is a predominance of aliphatic carbon structures, with a minimal variation of their functional-group composition both regionally and within soil depth. This vertical homogeneity and low level of aromaticity reflects the accumulation in soil of lowly decomposed organic matter due to cold temperatures. Mineralisation rates were found to be independent of SOM quality, and to be mainly explained solely by the total carbon content. Overall, our results provide further evidence on the sensitivity that the soils of Western Siberia may have to increasing ambient temperatures and highlight the important role that this region can play in the global carbon balance under the effects of climate warming. Article in Journal/Newspaper Arctic Siberia Directory of Open Access Journals: DOAJ Articles Arctic Solid Earth 7 1 153 165 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 Stratigraphy QE640-699 |
spellingShingle |
Geology QE1-996.5 Stratigraphy QE640-699 E. Ejarque E. Abakumov Stability and biodegradability of organic matter from Arctic soils of Western Siberia: insights from 13 C-NMR spectroscopy and elemental analysis |
topic_facet |
Geology QE1-996.5 Stratigraphy QE640-699 |
description |
Arctic soils contain large amounts of organic matter which, globally, exceed the amount of carbon stored in vegetation biomass and in the atmosphere. Recent studies emphasise the potential sensitivity for this soil organic matter (SOM) to be mineralised when faced with increasing ambient temperatures. In order to better refine the predictions about the response of SOM to climate warming, there is a need to increase the spatial coverage of empirical data on SOM quantity and quality in the Arctic area. This study provides, for the first time, a characterisation of SOM from the Gydan Peninsula in the Yamal Region, Western Siberia, Russia. On the one hand, soil humic acids and their humification state were characterised by measuring the elemental composition and diversity of functional groups using solid-state 13 C-nuclear magnetic resonance (NMR) spectroscopy. Also, the total mineralisable carbon was measured. Our results indicate that there is a predominance of aliphatic carbon structures, with a minimal variation of their functional-group composition both regionally and within soil depth. This vertical homogeneity and low level of aromaticity reflects the accumulation in soil of lowly decomposed organic matter due to cold temperatures. Mineralisation rates were found to be independent of SOM quality, and to be mainly explained solely by the total carbon content. Overall, our results provide further evidence on the sensitivity that the soils of Western Siberia may have to increasing ambient temperatures and highlight the important role that this region can play in the global carbon balance under the effects of climate warming. |
format |
Article in Journal/Newspaper |
author |
E. Ejarque E. Abakumov |
author_facet |
E. Ejarque E. Abakumov |
author_sort |
E. Ejarque |
title |
Stability and biodegradability of organic matter from Arctic soils of Western Siberia: insights from 13 C-NMR spectroscopy and elemental analysis |
title_short |
Stability and biodegradability of organic matter from Arctic soils of Western Siberia: insights from 13 C-NMR spectroscopy and elemental analysis |
title_full |
Stability and biodegradability of organic matter from Arctic soils of Western Siberia: insights from 13 C-NMR spectroscopy and elemental analysis |
title_fullStr |
Stability and biodegradability of organic matter from Arctic soils of Western Siberia: insights from 13 C-NMR spectroscopy and elemental analysis |
title_full_unstemmed |
Stability and biodegradability of organic matter from Arctic soils of Western Siberia: insights from 13 C-NMR spectroscopy and elemental analysis |
title_sort |
stability and biodegradability of organic matter from arctic soils of western siberia: insights from 13 c-nmr spectroscopy and elemental analysis |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/se-7-153-2016 https://doaj.org/article/22362c2b91844cf5856d7aa7a06209a6 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Siberia |
genre_facet |
Arctic Siberia |
op_source |
Solid Earth, Vol 7, Iss 1, Pp 153-165 (2016) |
op_relation |
http://www.solid-earth.net/7/153/2016/se-7-153-2016.pdf https://doaj.org/toc/1869-9510 https://doaj.org/toc/1869-9529 1869-9510 1869-9529 doi:10.5194/se-7-153-2016 https://doaj.org/article/22362c2b91844cf5856d7aa7a06209a6 |
op_doi |
https://doi.org/10.5194/se-7-153-2016 |
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Solid Earth |
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7 |
container_issue |
1 |
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153 |
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165 |
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