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Reduced quantity and quality of SOM along a thaw sequence on the Tibetan Plateau

文献类型：期刊论文

作者Liu, Futing6; Chen, Leiyi; Abbott, Benjamin W.; Xu, Yunping3,4; Yang, Guibiao6; Kou, Dan6; Qin, Shuqi6; Strauss, Jens2; Wang, Yinghui4; Zhang, Beibei
刊名ENVIRONMENTAL RESEARCH LETTERS
出版日期2018
卷号13期号:10
关键词carbon cycle climate feedback upland permafrost SOM quality abrupt thaw
ISSN号1748-9326
DOI10.1088/1748-9326/aae43b
文献子类Article
英文摘要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 maybe a dominant mechanism exposing soil C to mineralization.
学科主题Environmental Sciences ; Meteorology & Atmospheric Sciences
出版地BRISTOL
WOS关键词DISSOLVED ORGANIC-CARBON ; PERMAFROST CARBON ; SOIL CARBON ; GRASSLAND SOILS ; CLIMATE-CHANGE ; UPLAND TUNDRA ; ACTIVE LAYER ; MATTER ; TEMPERATURE ; BIODEGRADABILITY
语种英语
WOS记录号WOS:000447684800001
出版者IOP PUBLISHING LTD
资助机构National Basic Research Program of China on Global ChangeNational Basic Research Program of China [2014CB954001] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31670482, 31400364] ; Key Research Program of Frontier Sciences, CAS [QYZDB-SSW-SMC049] ; Chinese Academy of Sciences-Peking University Pioneer Cooperation Team ; Department of Plant and Wildlife Sciences at Brigham Young University ; College of Life Sciences at Brigham Young University ; European Research CouncilEuropean Research Council (ERC)European Commission [338335] ; Initiative and Networking Fund of the Helmholtz Association [ERC-0013]
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/20360]  
专题植被与环境变化国家重点实验室
作者单位1.Helmholtz Ctr Polar & Marine Res, Alfred Wegener Inst, Permafrost Res Unit, D-14473 Potsdam, Germany
2.Shanghai Ocean Univ, Coll Marine Sci, Shanghai Engn Res Ctr Hadal Sci & Technol, Shanghai 201306, Peoples R China
3.Peking Univ, Minist Educ, Coll Urban & Environm Sci, Key Lab Earth Surface Proc, Beijing 100871, Peoples R China
4.Abbott, Benjamin W.] Brigham Young Univ, Dept Plant & Wildlife Sci, Provo, UT 84602 USA
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
6.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Futing,Chen, Leiyi,Abbott, Benjamin W.,et al. Reduced quantity and quality of SOM along a thaw sequence on the Tibetan Plateau[J]. ENVIRONMENTAL RESEARCH LETTERS,2018,13(10).
APA Liu, Futing.,Chen, Leiyi.,Abbott, Benjamin W..,Xu, Yunping.,Yang, Guibiao.,...&Yang, Yuanhe.(2018).Reduced quantity and quality of SOM along a thaw sequence on the Tibetan Plateau.ENVIRONMENTAL RESEARCH LETTERS,13(10).
MLA Liu, Futing,et al."Reduced quantity and quality of SOM along a thaw sequence on the Tibetan Plateau".ENVIRONMENTAL RESEARCH LETTERS 13.10(2018).

入库方式： OAI收割

来源：植物研究所

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