globalchange  > 气候变化事实与影响
Scopus记录号: 2-s2.0-85059516112
论文题名:
Elevated CO 2 does not stimulate carbon sink in a semi-arid grassland
作者: 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.
刊名: Ecology Letters
ISSN: 1461023X
出版年: 2019
卷: 22, 期:3
起始页码: 458
结束页码: 468
语种: 英语
英文关键词: Carbon cycle ; climate warming ; CO 2 enrichment ; forb ; grass ; increased precipitation ; modelling ; multi-factor experiment ; nitrogen addition ; species composition
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
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122733
Appears in Collections:气候变化事实与影响

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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 Sciences, Beijing, 100101, China

Recommended Citation:
Song J.,Wan S.,Piao S.,et al. Elevated CO 2 does not stimulate carbon sink in a semi-arid grassland[J]. Ecology Letters,2019-01-01,22(3)
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