中国西北祁连山南坡和北坡青海云杉径向生长和δ13C对气候变化的差异响应

IF 3.4 2区 农林科学 Q1 FORESTRY
Li Qin, Huaming Shang, Weiping Liu, Yuting Fan, Kexiang Liu, Tongwen Zhang, Ruibo Zhang
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引用次数: 0

摘要

树木的径向生长会因环境的不同而对气候变化产生明显不同的反应。青海云杉是一种广泛分布于中国西北地区的原生针叶树,为了阐明不同环境下气候对其径向生长和稳定碳同位素(δ13C)分馏的影响,我们建立了祁连山南坡和北坡树木的树环宽度和δ13C的年代学,并分析了这些树环变量与主要气候因子之间的关系。结果表明,祁连山南坡和北坡树木的树环宽度受生长季早期气候因素的影响较大,北坡树木的径向生长对气候的敏感性高于南坡树木。树环δ13C对气候的敏感性高于径向生长。δ13C分馏主要受夏季温度和生长季节早期降水的影响。与光合速率相比,气孔导度对树木年轮中稳定碳同位素分馏的限制更大。随着气候变暖,山区树木年轮与气候之间的反应逐渐减弱。祁连山气候的持续变化可能会进一步加剧红豆杉径向生长和稳定碳同位素分馏的变化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Differential response of radial growth and δ13C in Qinghai spruce (Picea crassifolia) to climate change on the southern and northern slopes of the Qilian Mountains in Northwest China

Differential response of radial growth and δ13C in Qinghai spruce (Picea crassifolia) to climate change on the southern and northern slopes of the Qilian Mountains in Northwest China

Tree radial growth can have significantly different responses to climate change depending on the environment. To elucidate the effects of climate on radial growth and stable carbon isotope (δ13C) fractionation of Qinghai spruce (Picea crassifolia), a widely distributed native conifer in northwestern China in different environments, we developed chronologies for tree-ring widths and δ13C in trees on the southern and northern slopes of the Qilian Mountains, and analysed the relationship between these tree-ring variables and major climatic factors. Tree-ring widths were strongly influenced by climatic factors early in the growing season, and the radial growth in trees on the northern slopes was more sensitive to climate than in trees on the southern. Tree-ring δ13C was more sensitive to climate than radial growth. δ13C fractionation was mainly influenced by summer temperature and precipitation early in the growing season. Stomatal conductance more strongly limited stable carbon isotope fractionation in tree rings than photosynthetic rate did. The response between tree rings and climate in mountains gradually weakened as climate warmed. Changes in radial growth and stable carbon isotope fractionation of P. crassifolia in response to climate in the Qilian Mountains may be further complicated by continued climate change.

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来源期刊
CiteScore
7.30
自引率
3.30%
发文量
2538
期刊介绍: The Journal of Forestry Research (JFR), founded in 1990, is a peer-reviewed quarterly journal in English. JFR has rapidly emerged as an international journal published by Northeast Forestry University and Ecological Society of China in collaboration with Springer Verlag. The journal publishes scientific articles related to forestry for a broad range of international scientists, forest managers and practitioners.The scope of the journal covers the following five thematic categories and 20 subjects: Basic Science of Forestry, Forest biometrics, Forest soils, Forest hydrology, Tree physiology, Forest biomass, carbon, and bioenergy, Forest biotechnology and molecular biology, Forest Ecology, Forest ecology, Forest ecological services, Restoration ecology, Forest adaptation to climate change, Wildlife ecology and management, Silviculture and Forest Management, Forest genetics and tree breeding, Silviculture, Forest RS, GIS, and modeling, Forest management, Forest Protection, Forest entomology and pathology, Forest fire, Forest resources conservation, Forest health monitoring and assessment, Wood Science and Technology, Wood Science and Technology.
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