气候变化领域集成服务门户(CCPortal): Elevated CO 2 does not stimulate carbon sink in a semi-arid grassland

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DOI	10.1111/ele.13202
	Elevated CO 2 does not stimulate carbon sink in a semi-arid grassland
	Song J.; Wan S.; Piao S.; Hui D.; Hovenden M.J.; Ciais P.; Liu Y.; Liu Y.; Zhong M.; Zheng M.; Ma G.; Zhou Z.; Ru J.
发表日期	2019
ISSN	1461023X
卷号	22 期号:3
英文摘要	Elevated CO 2 is widely accepted to enhance terrestrial carbon sink, especially in arid and semi-arid regions. However, great uncertainties exist for the CO 2 fertilisation effects, particularly when its interactions with other global change factors are considered. A four-factor (CO 2 , temperature, precipitation and nitrogen) experiment revealed that elevated CO 2 did not affect either gross ecosystem productivity or ecosystem respiration, and consequently resulted in no changes of net ecosystem productivity in a semi-arid grassland despite whether temperature, precipitation and nitrogen were elevated or not. The observations could be primarily attributable to the offset of ecosystem carbon uptake by enhanced soil carbon release under CO 2 enrichment. Our findings indicate that arid and semi-arid ecosystems may not be sensitive to CO 2 enrichment as previously expected and highlight the urgent need to incorporate this mechanism into most IPCC carbon-cycle models for convincing projection of terrestrial carbon sink and its feedback to climate change. © 2019 John Wiley & Sons Ltd/CNRS
英文关键词	Carbon cycle; climate warming; CO 2 enrichment; forb; grass; increased precipitation; modelling; multi-factor experiment; nitrogen addition; species composition
语种	英语
scopus关键词	carbon; carbon dioxide; carbon cycle; carbon sequestration; ecosystem; grassland; Carbon; Carbon Cycle; Carbon Dioxide; Carbon Sequestration; Ecosystem; Grassland
来源期刊	Ecology Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/121138
作者单位	International Joint Research Laboratory for Global Change Ecology, School of Life Sciences, Henan University, Kaifeng, Henan 475004, China; College of Life Sciences, Hebei University, Baoding, Hebei 071002, China; Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing, 100871, China; Key Laboratory of Alpine Ecology and Biodiversity, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100085, China; Centre for Excellence in Tibetan Earth Science, Chinese Academy of Sciences, Beijing, 100085, China; Department of Biological Sciences, Tennessee State University, Nashville, TN 37209, United States; Biological Sciences, School of Natural Sciences, University of Tasmania, Private Bag 55, Hobart, TAS 7001, Australia; Laboratoire des Sciences du Climat et de l'Environnement, CEA CNRS UVSQ, Gif-sur-Yvette, France; Key Laboratory of Alpine Ecology and Biodiversity, Institute of Tibetan Plateau Research, Chinese Academy of...
推荐引用方式 GB/T 7714	Song J.,Wan S.,Piao S.,et al. Elevated CO 2 does not stimulate carbon sink in a semi-arid grassland[J],2019,22(3).
APA	Song J..,Wan S..,Piao S..,Hui D..,Hovenden M.J..,...&Ru J..(2019).Elevated CO 2 does not stimulate carbon sink in a semi-arid grassland.Ecology Letters,22(3).
MLA	Song J.,et al."Elevated CO 2 does not stimulate carbon sink in a semi-arid grassland".Ecology Letters 22.3(2019).