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Elevated CO(2)decreases soil carbon stability in Tibetan Plateau
Zhao, Guang; Liang, Chao1; Feng, Xiaojuan2,3; Liu, Lingli2,3; Zhu, Juntao; Chen, Ning4; Chen, Yao4; Wang, Li5; Zhang, Yangjian3,6
2020
Source PublicationENVIRONMENTAL RESEARCH LETTERS
ISSN1748-9326
Volume15Issue:11
AbstractThe 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.
Keywordalpine nitrogen addition soil density fractionation soil carbon partitioning enzyme activity microorganism
Subject AreaEnvironmental Sciences ; Meteorology & Atmospheric Sciences
DOI10.1088/1748-9326/abbb50
Indexed BySCI
Language英语
WOS KeywordPROGRESSIVE NITROGEN LIMITATION ; ATMOSPHERIC CO2 ; ECOSYSTEM RESPONSES ; PINE FOREST ; DIOXIDE ; PLANTS ; POOLS ; FACE ; TURNOVER ; GROWTH
WOS Research AreaEnvironmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS IDWOS:000578368800001
PublisherIOP PUBLISHING LTD
SubtypeArticle
Publication PlaceBRISTOL
Funding OrganizationStrategic Priority Program of Chinese Academy of Science [XDA20050102] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41991234, 41725003] ; Science Planning of the Tibet Autonomous Region [Y66M2701AL] ; China Postdoctoral Science FoundationChina Postdoctoral Science Foundation [2019M660781]
Corresponding Author Emailzhangyj@igsnrr.ac.cn
OAgold
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ibcas.ac.cn/handle/2S10CLM1/21555
Collection植被与环境变化国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, 11 Datun Rd, Beijing 100101, Peoples R China
2.Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China
3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100101, Peoples R China
4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100101, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100101, Peoples R China
6.Peking Univ, Shenzhen Grad Sch, Shenzhen 518055, Peoples R China
7.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
Recommended Citation
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).
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).
MLA Zhao, Guang,et al."Elevated CO(2)decreases soil carbon stability in Tibetan Plateau".ENVIRONMENTAL RESEARCH LETTERS 15.11(2020).
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