气候变化领域集成服务门户(CCPortal): Increasing intrinsic water-use efficiency over the past 160 years does not stimulate tree growth in southeastern China

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DOI	10.3354/cr01526
	Increasing intrinsic water-use efficiency over the past 160 years does not stimulate tree growth in southeastern China
	Guo G.; Fang K.; Li J.; Linderholm H.W.; Li D.; Zhou F.; Dong Z.; Li Y.; Wang L.
发表日期	2018
ISSN	0936-577X
起始页码	115
结束页码	130
卷号	76 期号:2
英文摘要	Understanding the responses of tree growth and intrinsic water-use efficiency (iWUE) to anthropogenic CO2 increase and climate warming provides important benchmarks for evaluating future forest dynamics under different scenarios of warming and CO2 changes. Relative to the short period of instrumental data of the past few decades, long-term tree-ring width and stable carbon isotopic (δ13C) data are invaluable in fully comprehending their interactions during the entire industrial era, since ~1850. Here, we present a tree-ring width chronology (1856 to 2015) and Δ13C series (1876-2015) of Pinus massoniana for Yongtai county of Fujian province, in humid subtropical China, a 'green island' relative to other dry subtropical areas of the world. Tree growth was limited by precipitation of the hydrological year (previous November to current October) (r = 0.568, p < 0.001), and the stable carbon isotope discrimination (Δ13C) was strongly correlated with relative humidity in September-October (r =-0.677, p < 0.001) of the current growing season. We found that the iWUE increased by 40.9% since 1876. Specifically, we found that the ci:ca ratio decreased during the study period whereas intercellular CO2 concentration (ci) increased. The negative relationship between basal area increment (BAI) and iWUE indicated that increasing iWUE may not lead to long-term enhancement of tree growth. Our results indicated a drought-induced limitation to tree growth in response to rising CO2, and that trees may mitigate the negative effects of a decrease in water availability through a reduction in stomatal conductance. © 2018 Inter-Research.
英文关键词	Humid subtropical China; Intrinsic water-use efficiency; Pinus massoniana; Stable carbon isotope; Tree-ring
语种	英语
scopus关键词	Pinus massoniana
来源期刊	Climate Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146970
作者单位	Institute of Geography, Key Laboratory of Humid Subtropical Eco-geographical Process, Ministry of Education, College of Geographical Sciences, Fujian Normal University, Fuzhou, 350007, China; Regional Climate Group, Department of Earth Sciences, University of Gothenburg, Box 460, Gothenburg, 40530, Sweden; Department of Geography, University of Hong Kong, Pokfulam, Hong Kong
推荐引用方式 GB/T 7714	Guo G.,Fang K.,Li J.,et al. Increasing intrinsic water-use efficiency over the past 160 years does not stimulate tree growth in southeastern China[J],2018,76(2).
APA	Guo G..,Fang K..,Li J..,Linderholm H.W..,Li D..,...&Wang L..(2018).Increasing intrinsic water-use efficiency over the past 160 years does not stimulate tree growth in southeastern China.Climate Research,76(2).
MLA	Guo G.,et al."Increasing intrinsic water-use efficiency over the past 160 years does not stimulate tree growth in southeastern China".Climate Research 76.2(2018).