干旱区生态环境知识资源中心(Arid): 树木年轮宽度与气候变化关系研究进展

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	树木年轮宽度与气候变化关系研究进展
其他题名	Advances in research on the relationship between climatic change and tree-ring width
	王婷; 于丹; 李江风; 马克平
来源期刊	植物生态学报
ISSN	1005-264X
出版年	2003
卷号	27 期号:1 页码:23-33
中文摘要	树木的生长和立地环境密切相关并受多种气候因子的影响。树木年轮宽度的增加与温度、降水、太阳辐射、CO2浓度等气候因子有着复杂的相关关系。在干旱或半干旱地区，温度是限制树木生长的重要气候因子。生长季开始时最低温度的升高有利于延长生长季，与年轮宽度正相关；但是当生长季温度过高时，即使降水非常充裕，当年也只能形成窄年轮。生长季的温度过高则会加快土壤蒸发失水量并提高蒸汽压差，使土壤水分不足而不利于树木生长，因而生长季的高温多表现为年轮宽度的负相关。生长期内降水量与树木的径向生长也成正相关，但当生长季的降水量充足或过多时，降水对树木径向生长不相关或负相关。受温度和降水共同调控的土壤湿度是树木径向生长的主要限制因子，良好的水分状况对树木生长起决定性作用。某一地区的太阳辐射能量高常会导致高温少雨，故高强度的太阳辐射使表土的湿度降低而不利于树木的径向生长。而在受季风影响的地区，树木年轮宽度的增加与当年雨季的气候变化关系不大。当年季风到来之前的气候（温度和降水）是树木生长的主要限制因子。有关CO2浓度的升高对树木生长的影响，研究的结果很不一致。一些温室实验及田间控制实验证明，CO2浓度的升高能对短命的一年生草本植物和植物幼苗产生施肥效应，并有利于其生长；还有些研究证明CO2浓度的升高能使高海拔地带的树木年轮宽度增加；但也有些研究认为CO2浓度的升高对生长在自然条件下的自然植被影响不大。近年来，有关树木径向生长和气候变化的研究越来越引起人们的关注，相关研究也取得了较大的进展。这些研究在帮助人们了解和研究古气候变化对森林植被的影响，以及预测未来全球变化对陆地生态系统的影响等方面有重要的理论和现实意义。综述了气候变化对树木年轮宽度影响的研究进展和应用，并概述了研究方法和发展前景，希望能加快和拓宽这一领域的发展。
英文摘要	There are significant correlations between tree growth and environment. Growth of trees is strongly influenced by environment and climatic factors. Tree-ring widths are significantly correlated with some climatic factors, such as temperature, precipitation, solar radiation and increasing atmospheric CO-2. Temperature is found to be an important climatic factor for the growth of trees in arid and semiarid regions. The increment of the lowest temperature at the beginning of growing season can extend the growing period favoring tree growth, and significantly increase tree ring widths, while trees will have narrow rings at extreme high temperature even when accompanied with abundant precipitation in the growing season. High temperature accelerates evaporation and evapotranspiration, which can result in anomalous moisture stress for the growth of the trees. Temperature and tree ring width are inversely proportional i.e. higher the temperature, lower the tree ring width. Similarly, the precipitation in growing season also plays an important part in the growth of trees. Tree-ring widths also respond positively to precipitation at the beginning of the growing period. In contrast, they show adverse or neutral response to excessive rainfall because precipitation is no more the limiting factor to tree growth at that time. The significant relation between trees growth and climatic factors could be primarily attributed to the availability of soil moisture, which is determined by temperature and precipitation together. A favorable water balance seems to be decisive to the increment of tree-ring width. High solar radiation has a negative effect onthe tree growth, because high solar radiation usually means both low rainfall and high temperature, which in turn often result in low soil moisture and hampers tree growth. Although the rainfall is abundant in the areas influenced by monsoon, it shows no evident effect on tree-ring widths through monsoon. Pre-monsoon weather conditions (e.g. temperature and precipitation) are important limiting parameters for tree growth. Up to now, there have been no consistent conclusions about the relationship between tree-ring width and the increasing atmospheric CO-2. It is confirmed that the increasing CO-2 level increase growth of some tree seedlings and some short-life plant in greenhouses or in limit field experiments. Some experimental evidences also show that CO-2 level can be an important limiting factor in the growth of plants in the high-altitude environment. However, there are some experiments having failed to give tree-ring evidence for a possible CO-2 fertilization effect under natural environmental condition. Recently, scientists have made considerable progress in this field. These achievements can greatly help not only probe into the impact of paleo-climate on forest vegetation but also predict the effect of global climate change on terrestrial ecosystem. This paper reviewed the advances, applications and methods in this field, which aimed to widen people’ s knowledge and accelerate the development of this field.
中文关键词	树木年轮宽度 ; 气候变化 ; 关系 ; 研究进展 ; 气候因子
英文关键词	Tree-ring width Climatic change Climatic factor
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Forestry
WOS研究方向	Forestry
CSCD记录号	CSCD:1289818
来源机构	中国科学院植物研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/204559
作者单位	王婷, 武汉大学生命科学学院, 武汉, 湖北 430072, 中国.; 于丹, 武汉大学生命科学学院, 武汉, 湖北 430072, 中国.; 李江风, 新疆气象科学研究所, 乌鲁木齐, 新疆 830002, 中国.; 马克平, 中国科学院植物研究所, 北京 100093, 中国.
推荐引用方式 GB/T 7714	王婷,于丹,李江风,等. 树木年轮宽度与气候变化关系研究进展[J]. 中国科学院植物研究所,2003,27(1):23-33.
APA	王婷,于丹,李江风,&马克平.(2003).树木年轮宽度与气候变化关系研究进展.植物生态学报,27(1),23-33.
MLA	王婷,et al."树木年轮宽度与气候变化关系研究进展".植物生态学报 27.1(2003):23-33.