Warming Effects on Ecosystem Carbon Fluxes Are Modulated by Plant Functional Types
Chen, J; Luo, YQ; Xia, JY; Wilcox, KR; Cao, JJ; Zhou, XH; Jiang, LF; Niu, SL; Estera, KY; Huang, RJ; Wu, F; Hu, TF; Liang, JY; Shi, Z; Guo, JF; Wang, RW
2017
Source PublicationECOSYSTEMS
ISSN1432-9840
Volume20Issue:3Pages:515-526
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.
SubtypeJournal
Keywordecosystem carbon fluxes net ecosystem exchange climate change aboveground biomass plant functional types soil inorganic nitrogen experimental warming Tibetan plateau
Subject AreaEnvironmental Sciences & Ecology
WOS Subject ExtendedEcology
WOS KeywordNET NITROGEN MINERALIZATION ; QINGHAI-TIBETAN PLATEAU ; CLIMATE-CHANGE ; ALPINE MEADOW ; SOIL RESPIRATION ; TEMPERATURE SENSITIVITY ; DIFFERENTIAL RESPONSES ; ORGANIC-CARBON ; GLOBAL CHANGE ; FOREST
Indexed BySCI
Language英语
WOS IDWOS:000399816600005
PublisherSPRINGER
Citation statistics
Cited Times:23[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44079
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Chen, J,Luo, YQ,Xia, JY,et al. Warming Effects on Ecosystem Carbon Fluxes Are Modulated by Plant Functional Types[J]. ECOSYSTEMS,2017,20(3):515-526.
APA Chen, J.,Luo, YQ.,Xia, JY.,Wilcox, KR.,Cao, JJ.,...&Wang, RW.(2017).Warming Effects on Ecosystem Carbon Fluxes Are Modulated by Plant Functional Types.ECOSYSTEMS,20(3),515-526.
MLA Chen, J,et al."Warming Effects on Ecosystem Carbon Fluxes Are Modulated by Plant Functional Types".ECOSYSTEMS 20.3(2017):515-526.
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