Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/aae43b |
Reduced quantity and quality of SOM along a thaw sequence on the Tibetan Plateau | |
Liu, Futing1,2; Chen, Leiyi1; Abbott, Benjamin W.3; Xu, Yunping4,5; Yang, Guibiao1,2; Kou, Dan1,2; Qin, Shuqi1,2; Strauss, Jens6; Wang, Yinghui4; Zhang, Beibei1; Yang, Yuanhe1,2 | |
2018-10-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS
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ISSN | 1748-9326 |
出版年 | 2018 |
卷号 | 13期号:10 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA; Germany |
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. |
英文关键词 | carbon cycle climate feedback upland permafrost SOM quality abrupt thaw |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000447684800001 |
WOS关键词 | DISSOLVED ORGANIC-CARBON ; PERMAFROST CARBON ; SOIL CARBON ; GRASSLAND SOILS ; CLIMATE-CHANGE ; UPLAND TUNDRA ; ACTIVE LAYER ; MATTER ; TEMPERATURE ; BIODEGRADABILITY |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/33169 |
专题 | 气候变化 |
作者单位 | 1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 3.Brigham Young Univ, Dept Plant & Wildlife Sci, Provo, UT 84602 USA; 4.Peking Univ, Minist Educ, Coll Urban & Environm Sci, Key Lab Earth Surface Proc, Beijing 100871, Peoples R China; 5.Shanghai Ocean Univ, Coll Marine Sci, Shanghai Engn Res Ctr Hadal Sci & Technol, Shanghai 201306, Peoples R China; 6.Helmholtz Ctr Polar & Marine Res, Alfred Wegener Inst, Permafrost Res Unit, D-14473 Potsdam, Germany |
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). |
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