Elevated CO2 decreases soil carbon stability in Tibetan Plateau
文献类型：期刊论文
| 作者 | Zhao,Guang5; Liang,Chao6; Feng,Xiaojuan2,7; Liu,Lingli2,7; Zhu,Juntao5; Chen,Ning3,5; Chen,Yao3,5; Wang,Li4; Zhang,Yangjian1,2,5 |
| 刊名 | Environmental Research Letters
 |
| 出版日期 | 2020-10-14 |
| 卷号 | 15期号:11 |
| 关键词 | alpine nitrogen addition soil density fractionation soil carbon partitioning enzyme activity microorganism |
| DOI | 10.1088/1748-9326/abbb50 |
| 通讯作者 | Zhang,Yangjian() |
| 英文摘要 | AbstractThe lack of ecosystem-scale CO2 enrichment experiments in alpine regions considerably restricts our ability to predict the feedback of the global carbon (C) cycle to climate change. Here we investigate soil C response in an experiment with 5-year CO2 enrichment and nitrogen (N) fertilization in a Tibetan meadow (4585 m above the sea level). We found that despite non-significant increase in bulk soil C pool, elevated CO2 dramatically altered the allocation of C in different soil fractions and soil mineralization potentials. By changing soil microbial composition and enhancing enzyme activities, elevated CO2 significantly accelerated soil organic matter (SOM) mineralization rates and stimulated the microbial utilization of ‘old C’ relative to that of ‘new C’. Furthermore, N fertilization under elevated CO2 altered the decomposition process, increased the fungi to bacteria ratio, and decreased the coarse particulate organic matter pool and enzyme activities, indicating that N fertilization counters the CO2 fertilization effect. Overall, our findings suggest a growing threat of elevated CO2 in reducing SOM stability, and highlight the key role of N availability in driving soil C turnover under elevated CO2. |
| 语种 | 英语 |
| WOS记录号 | IOP:1748-9326-15-11-ABBB50 |
| 出版者 | IOP Publishing |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/156737]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Zhang,Yangjian |
| 作者单位 | 1.CAS center for excellence in Tibetan Plateau Earth Sciences, Beijing 100101, People’s Republic of China 2.College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100101, People’s Republic of China 3.University of Chinese Academy of Sciences, Beijing 100101, People’s Republic of China 4.Peking University Shenzhen Graduate School, Shenzhen 518055, People’s Republic of China 5.Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 11 Datun Road, Chaoyang District, Beijing 100101, People’s Republic of China 6.Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China 7.State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Science, Beijing 100101, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Zhao,Guang,Liang,Chao,Feng,Xiaojuan,et al. Elevated CO2 decreases soil carbon stability in Tibetan Plateau[J]. Environmental Research Letters,2020,15(11). |
| APA | Zhao,Guang.,Liang,Chao.,Feng,Xiaojuan.,Liu,Lingli.,Zhu,Juntao.,...&Zhang,Yangjian.(2020).Elevated CO2 decreases soil carbon stability in Tibetan Plateau.Environmental Research Letters,15(11). |
| MLA | Zhao,Guang,et al."Elevated CO2 decreases soil carbon stability in Tibetan Plateau".Environmental Research Letters 15.11(2020). |
入库方式： OAI收割
来源：地理科学与资源研究所
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