DOI: 10.3354/cr01526
Scopus记录号: 2-s2.0-85052833161
论文题名: Increasing intrinsic water-use efficiency over the past 160 years does not stimulate tree growth in southeastern China
作者: Guo G. ; Fang K. ; Li J. ; Linderholm H.W. ; Li D. ; Zhou F. ; Dong Z. ; Li Y. ; Wang L.
刊名: Climate Research
ISSN: 0936577X
出版年: 2018
卷: 76, 期: 2 起始页码: 115
结束页码: 130
语种: 英语
英文关键词: Humid subtropical China
; Intrinsic water-use efficiency
; Pinus massoniana
; Stable carbon isotope
; Tree-ring
Scopus关键词: Pinus massoniana
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116269
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
Recommended Citation:
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]. Climate Research,2018-01-01,76(2)