Reduced quantity and quality of SOM along a thaw sequence on the Tibetan Plateau
Carbon (C) release from thawing permafrost is potentially the largest climate feedback from terrestrial ecosystems. However, the magnitude of this feedback remains highly uncertain, partly due to the limited understanding of how abrupt permafrost thaw (e.g., permafrost collapse) alters soil organic...
Published in: | Environmental Research Letters |
---|---|
Main Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
2018
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/48127/ https://doi.org/10.1088/1748-9326/aae43b https://hdl.handle.net/10013/epic.fdf2641a-498d-464b-ad6a-c3d788dd6be2 |
id |
ftawi:oai:epic.awi.de:48127 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:48127 2024-09-09T20:02:46+00:00 Reduced quantity and quality of SOM along a thaw sequence on the Tibetan Plateau Futing, Liu Chen, Leiyi Abbott, Benjamin Walter Xu, Yunping Yang, Guibiao Kou, Dan Qin, Shuqi Strauss, Jens Wang, Yinghui Zhang, Beibei Yang, Yuanhe 2018 https://epic.awi.de/id/eprint/48127/ https://doi.org/10.1088/1748-9326/aae43b https://hdl.handle.net/10013/epic.fdf2641a-498d-464b-ad6a-c3d788dd6be2 unknown Futing, L. , Chen, L. , Abbott, B. W. , Xu, Y. , Yang, G. , Kou, D. , Qin, S. , Strauss, J. orcid:0000-0003-4678-4982 , Wang, Y. , Zhang, B. and Yang, Y. (2018) Reduced quantity and quality of SOM along a thaw sequence on the Tibetan Plateau , Environmental Research Letters . doi:10.1088/1748-9326/aae43b <https://doi.org/10.1088/1748-9326%2Faae43b> , hdl:10013/epic.fdf2641a-498d-464b-ad6a-c3d788dd6be2 info:eu-repo/semantics/openAccess EPIC3Environmental Research Letters, ISSN: 1748-9326 Article isiRev info:eu-repo/semantics/article 2018 ftawi https://doi.org/10.1088/1748-9326/aae43b 2024-06-24T04:21:00Z Carbon (C) release from thawing permafrost is potentially the largest climate feedback from terrestrial ecosystems. However, the magnitude of this feedback remains highly uncertain, partly due to the limited understanding of how abrupt permafrost thaw (e.g., permafrost collapse) alters soil organic matter (SOM) quality. Here we employed elemental analysis, stable isotope analysis, biomarker and nuclear magnetic resonance techniques to explore changes in soil C concentration and stock as well as SOM quality following permafrost collapse on the Tibetan Plateau. Our results showed that permafrost collapse resulted in a 21% decrease in soil C concentration and a 32% reduction in C stock of the top 15 cm of soil over 16 years. Moreover, permafrost collapse led to a significant decline in SOM quality: the relative abundance of labile SOM fractions (e.g., carbohydrates) decreased, whereas recalcitrant SOM fractions (e.g., suberin-derived compounds) increased 16 years after collapse. By contrast, the relative abundances of labile and recalcitrant compounds showed no significant differences in the control plots along the thaw sequence. These results demonstrate that permafrost collapse and consequent changes in soil environmental conditions could trigger substantial C release on decadal timescales, implying that abrupt thaw may be a dominant mechanism exposing soil C to mineralization. Article in Journal/Newspaper permafrost Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Environmental Research Letters 13 10 104017 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Carbon (C) release from thawing permafrost is potentially the largest climate feedback from terrestrial ecosystems. However, the magnitude of this feedback remains highly uncertain, partly due to the limited understanding of how abrupt permafrost thaw (e.g., permafrost collapse) alters soil organic matter (SOM) quality. Here we employed elemental analysis, stable isotope analysis, biomarker and nuclear magnetic resonance techniques to explore changes in soil C concentration and stock as well as SOM quality following permafrost collapse on the Tibetan Plateau. Our results showed that permafrost collapse resulted in a 21% decrease in soil C concentration and a 32% reduction in C stock of the top 15 cm of soil over 16 years. Moreover, permafrost collapse led to a significant decline in SOM quality: the relative abundance of labile SOM fractions (e.g., carbohydrates) decreased, whereas recalcitrant SOM fractions (e.g., suberin-derived compounds) increased 16 years after collapse. By contrast, the relative abundances of labile and recalcitrant compounds showed no significant differences in the control plots along the thaw sequence. These results demonstrate that permafrost collapse and consequent changes in soil environmental conditions could trigger substantial C release on decadal timescales, implying that abrupt thaw may be a dominant mechanism exposing soil C to mineralization. |
format |
Article in Journal/Newspaper |
author |
Futing, Liu Chen, Leiyi Abbott, Benjamin Walter Xu, Yunping Yang, Guibiao Kou, Dan Qin, Shuqi Strauss, Jens Wang, Yinghui Zhang, Beibei Yang, Yuanhe |
spellingShingle |
Futing, Liu Chen, Leiyi Abbott, Benjamin Walter Xu, Yunping Yang, Guibiao Kou, Dan Qin, Shuqi Strauss, Jens Wang, Yinghui Zhang, Beibei Yang, Yuanhe Reduced quantity and quality of SOM along a thaw sequence on the Tibetan Plateau |
author_facet |
Futing, Liu Chen, Leiyi Abbott, Benjamin Walter Xu, Yunping Yang, Guibiao Kou, Dan Qin, Shuqi Strauss, Jens Wang, Yinghui Zhang, Beibei Yang, Yuanhe |
author_sort |
Futing, Liu |
title |
Reduced quantity and quality of SOM along a thaw sequence on the Tibetan Plateau |
title_short |
Reduced quantity and quality of SOM along a thaw sequence on the Tibetan Plateau |
title_full |
Reduced quantity and quality of SOM along a thaw sequence on the Tibetan Plateau |
title_fullStr |
Reduced quantity and quality of SOM along a thaw sequence on the Tibetan Plateau |
title_full_unstemmed |
Reduced quantity and quality of SOM along a thaw sequence on the Tibetan Plateau |
title_sort |
reduced quantity and quality of som along a thaw sequence on the tibetan plateau |
publishDate |
2018 |
url |
https://epic.awi.de/id/eprint/48127/ https://doi.org/10.1088/1748-9326/aae43b https://hdl.handle.net/10013/epic.fdf2641a-498d-464b-ad6a-c3d788dd6be2 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
EPIC3Environmental Research Letters, ISSN: 1748-9326 |
op_relation |
Futing, L. , Chen, L. , Abbott, B. W. , Xu, Y. , Yang, G. , Kou, D. , Qin, S. , Strauss, J. orcid:0000-0003-4678-4982 , Wang, Y. , Zhang, B. and Yang, Y. (2018) Reduced quantity and quality of SOM along a thaw sequence on the Tibetan Plateau , Environmental Research Letters . doi:10.1088/1748-9326/aae43b <https://doi.org/10.1088/1748-9326%2Faae43b> , hdl:10013/epic.fdf2641a-498d-464b-ad6a-c3d788dd6be2 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1088/1748-9326/aae43b |
container_title |
Environmental Research Letters |
container_volume |
13 |
container_issue |
10 |
container_start_page |
104017 |
_version_ |
1809934693050613760 |