globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2313
论文题名:
No growth stimulation of tropical trees by 150 years of CO2 fertilization but water-use efficiency increased
作者: Van Der Sleen P.; Groenendijk P.; Vlam M.; Anten N.P.R.; Boom A.; Bongers F.; Pons T.L.; Terburg G.; Zuidema P.A.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2015
卷: 8, 期:1
起始页码: 24
结束页码: 28
语种: 英语
Scopus关键词: carbon dioxide ; fertilization (reproduction) ; forest canopy ; growth rate ; phytomass ; tropical forest ; water use efficiency ; Bolivia ; Cameroon ; Thailand
英文摘要: The biomass of undisturbed tropical forests has likely increased in the past few decades, probably as a result of accelerated tree growth. Higher CO2 levels are expected to raise plant photosynthetic rates and enhance water-use efficiency, that is, the ratio of carbon assimilation through photosynthesis to water loss through transpiration. However, there is no evidence that these physiological responses do indeed stimulate tree growth in tropical forests. Here we present measurements of stable carbon isotopes and growth rings in the wood of 1,100 trees from Bolivia, Cameroon and Thailand. Measurements of carbon isotope fractions in the wood indicate that intrinsic water-use efficiency in both understorey and canopy trees increased by 30-35% over the past 150 years as atmospheric CO2 concentrations increased. However, we found no evidence for the suggested concurrent acceleration of individual tree growth when analysing the width of growth rings. We conclude that the widespread assumption of a CO2-induced stimulation of tropical tree growth may not be valid. © 2014 Macmillan Publishers Limited. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106205
Appears in Collections:气候减缓与适应
科学计划与规划

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作者单位: Forest Ecology and Management Group, Wageningen University, Droevendaalsesteeg 3, PB, Wageningen, Netherlands; Instituto Boliviano de Investigación Forestal, Casilla 6204, Santa Cruz de la Sierra, Bolivia; Centre for Crop Systems Analysis, Wageningen University, Droevendaalsesteeg 1, PB, Wageningen, Netherlands; Department of Ecology and Biodiversity, Institute of Environmental Biology, Utrecht University, Padualaan 8, CH, Utrecht, Netherlands; Department of Geography, University of Leicester, Leicester, United Kingdom; Department of Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, Padualaan 8, CH, Utrecht, Netherlands

Recommended Citation:
Van Der Sleen P.,Groenendijk P.,Vlam M.,et al. No growth stimulation of tropical trees by 150 years of CO2 fertilization but water-use efficiency increased[J]. Nature Geoscience,2015-01-01,8(1)
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