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Warming Effects on Ecosystem Carbon Fluxes Are Modulated by Plant Functional Types
Chen, Ji1,2,3,4,5; Luo, Yiqi5,6; Xia, Jianyang7,8; Wilcox, Kevin R.5; Cao, Junji2,3,9; Zhou, Xuhui7,8; Jiang, Lifen5; Niu, Shuli10; Estera, Katerina Y.11; Huang, Rujin2,3; Wu, Feng2,3; Hu, Tafeng5; Liang, Junyi5; Shi, Zheng5; Guo, Jianfen12; Wang, Rui-Wu1
Source PublicationECOSYSTEMS
AbstractDespite the importance of future carbon (C) pools for policy and land management decisions under various climate change scenarios, predictions of these pools under altered climate vary considerably. Chronic warming will likely impact both ecosystem C fluxes and the abundance and distribution of plant functional types (PFTs) within systems, potentially interacting to create novel patterns of C exchange. Here, we report results from a 3-year warming experiment using open top chambers (OTC) on the Tibetan Plateau meadow grassland. Warming significantly increased C uptake through gross primary productivity (GPP) but not ecosystem respiration (ER), resulting in a 31.0% reduction in net ecosystem exchange (NEE) in warmed plots. The OTC-induced changes in ecosystem C fluxes were not fully explained by the corresponding changes in soil temperature and moisture. Warming treatments significantly increased the biomass of graminoids and legumes by 12.9 and 27.6%. These functional shifts were correlated with enhanced local GPP, but not ER, resulting in more negative NEE in plots with larger increases in graminoid and legume biomass. This may be due to a link between greater legume abundance and higher levels of total inorganic nitrogen, which can potentially drive higher GPP, but not higher ER. Overall, our results indicate that C-climate feedbacks might be closely mediated by climate-induced changes in PFTs. This highlights the need to consider the impacts of changes in PFTs when predicting future responses of C pools under altered climate scenarios.
KeywordEcosystem Carbon Fluxes Net Ecosystem Exchange Climate Change Aboveground Biomass Plant Functional Types Soil Inorganic Nitrogen Experimental Warming Tibetan Plateau
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Indexed BySCI
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEcology
WOS IDWOS:000399816600005
Citation statistics
Cited Times:27[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Northwestern Polytech Univ, Ctr Ecol & Environm Sci, Xian 710072, Peoples R China
2.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol SKLLQG, Xian 710061, Peoples R China
3.Chinese Acad Sci, Key Lab Aerosol Chem & Phys, Inst Earth Environm, Xian 710061, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Univ Oklahoma, Dept Microbiol & Plant Biol, Norman, OK 73019 USA
6.Tsinghua Univ, Ctr Earth Syst Sci, Beijing 100084, Peoples R China
7.East China Normal Univ, Sch Ecol & Environm Sci, Tiantong Natl Field Observat Stn Forest Ecosyst, Shanghai 200062, Peoples R China
8.East China Normal Univ, Ctr Global Change & Ecol Forecasting, Shanghai 200062, Peoples R China
9.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China
10.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Synth Res Ctr Chinese Ecosyst Res Network, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
11.Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA
12.Fujian Normal Univ, Coll Geog Sci, Fuzhou 350007, Peoples R China
Recommended Citation
GB/T 7714
Chen, Ji,Luo, Yiqi,Xia, Jianyang,et al. Warming Effects on Ecosystem Carbon Fluxes Are Modulated by Plant Functional Types[J]. ECOSYSTEMS,2017,20(3):515-526.
APA Chen, Ji.,Luo, Yiqi.,Xia, Jianyang.,Wilcox, Kevin R..,Cao, Junji.,...&Wang, Rui-Wu.(2017).Warming Effects on Ecosystem Carbon Fluxes Are Modulated by Plant Functional Types.ECOSYSTEMS,20(3),515-526.
MLA Chen, Ji,et al."Warming Effects on Ecosystem Carbon Fluxes Are Modulated by Plant Functional Types".ECOSYSTEMS 20.3(2017):515-526.
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