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Elevated CO(2)decreases soil carbon stability in Tibetan Plateau

文献类型：期刊论文

作者Zhao, Guang5; Liang, Chao3; Feng, Xiaojuan2,4; Liu, Lingli2,4; Zhu, Juntao5; Chen, Ning5,6; Chen, Yao5,6; Wang, Li7; Zhang, Yangjian1,4,5
刊名ENVIRONMENTAL RESEARCH LETTERS
出版日期2020-11-01
卷号15期号:11页码:13
ISSN号1748-9326
关键词alpine nitrogen addition soil density fractionation soil carbon partitioning enzyme activity microorganism
DOI10.1088/1748-9326/abbb50
通讯作者Zhang, Yangjian(zhangyj@igsnrr.ac.cn)
英文摘要The lack of ecosystem-scale CO(2)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 CO(2)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 CO(2)dramatically altered the allocation of C in different soil fractions and soil mineralization potentials. By changing soil microbial composition and enhancing enzyme activities, elevated CO(2)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 CO(2)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 CO(2)fertilization effect. Overall, our findings suggest a growing threat of elevated CO(2)in reducing SOM stability, and highlight the key role of N availability in driving soil C turnover under elevated CO2.
WOS关键词PROGRESSIVE NITROGEN LIMITATION ; ATMOSPHERIC CO2 ; ECOSYSTEM RESPONSES ; PINE FOREST ; DIOXIDE ; PLANTS ; POOLS ; FACE ; TURNOVER ; GROWTH
资助项目Strategic Priority Program of Chinese Academy of Science[XDA20050102] ; National Natural Science Foundation of China[41991234] ; National Natural Science Foundation of China[41725003] ; Science Planning of the Tibet Autonomous Region[Y66M2701AL] ; China Postdoctoral Science Foundation[2019M660781]
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
语种英语
出版者IOP PUBLISHING LTD
WOS记录号WOS:000578368800001
资助机构Strategic Priority Program of Chinese Academy of Science ; National Natural Science Foundation of China ; Science Planning of the Tibet Autonomous Region ; China Postdoctoral Science Foundation
源URL[http://ir.igsnrr.ac.cn/handle/311030/157063]  
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 Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100101, Peoples R China
3.Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China
4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100101, Peoples R China
5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, 11 Datun Rd, Beijing 100101, Peoples R China
6.Univ Chinese Acad Sci, Beijing 100101, Peoples R China
7.Peking Univ, Shenzhen Grad Sch, Shenzhen 518055, Peoples R China
推荐引用方式
GB/T 7714		 Zhao, Guang,Liang, Chao,Feng, Xiaojuan,et al. Elevated CO(2)decreases soil carbon stability in Tibetan Plateau[J]. ENVIRONMENTAL RESEARCH LETTERS,2020,15(11):13.
APA Zhao, Guang.,Liang, Chao.,Feng, Xiaojuan.,Liu, Lingli.,Zhu, Juntao.,...&Zhang, Yangjian.(2020).Elevated CO(2)decreases soil carbon stability in Tibetan Plateau.ENVIRONMENTAL RESEARCH LETTERS,15(11),13.
MLA Zhao, Guang,et al."Elevated CO(2)decreases soil carbon stability in Tibetan Plateau".ENVIRONMENTAL RESEARCH LETTERS 15.11(2020):13.

入库方式： OAI收割

来源：地理科学与资源研究所

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