文献类型：期刊文献

中文题名：基于广义可加模型的气候对单木胸径生长的影响研究

英文题名：Impact of climate on individual tree radial growth based on generalized additive model

作者：余黎[1] 雷相东[1] 王雅志[2] 杨英军[2] 王全军[2]

第一作者：余黎

机构：[1]中国林业科学研究院资源信息研究所;[2]吉林省汪清林业局

年份：2014

卷号：36

期号：5

起止页码：22-32

中文期刊名：北京林业大学学报

外文期刊名：Journal of Beijing Forestry University

收录：CSTPCD;;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：国家自然科学基金项目(31270679)

语种：中文

中文关键词：气候变化;广义可加模型;单木胸径生长

外文关键词：climate change; generalized additive model; individual tree radial growth

分类号：S758.1

摘要：基于吉林省汪清林业局落叶松-云冷杉林长期固定样地25年观测数据,采用广义可加模型方法,建立了包含气候因子的单木胸径生长模型,研究气候因子对单木胸径生长的影响及不同树种的响应差异。结果表明:生长季≥5℃积温、生长季最低气温、年平均总降水量、月气温差以及年平均气温与年平均总降水量之比5个气候因子对该类型的落叶松、红松、冷杉、云杉、慢阔和中阔6个树种(组)的单木的年平均胸径生长量都有显著的影响,但不同树种组的气候响应变量和程度不同。对含气候和林分因子的全模型、仅含林分因子的部分模型以及仅含气候因子的部分模型进行了统计分析,结果显示:3类模型分别能解释50.8%、45.7%和29.5%的胸径生长变异,说明在局部尺度气候因子对胸径生长的解释能力有限;影响胸径生长的主要因子是单木的期初胸径、大于对象木的断面积之和、林分每公顷株数和林分断面积平均胸径。
The generalized additive model （GAM） was used to investigate the effects of climate on individual tree radial growth and tree species＇ responses to climate. The data was collected from long-term permanent plots of larch-spruce-fir forests repeatedly measured for 25 years in Wangqing Forestry Bureau, Jilin Province of northeastern China. Our results showed that accumulated temperature in growing season, mean minimum temperature during growing season, annual total precipitation, mean temperature difference between the coldest and warmest months and the ratio of annual temperature and annual total precipitation significantly explained the variation in radial growth, but varied in the response variables and magnitude of different tree species （larch, spruce, fir, Korean pine and two hardwood groups）. The full model, reduced model 1 （stand variables） and 2 （climate variables） could explain 50. 8% , 45.7% and 29.5% of the variation in radial growth, respectively. It is concluded that climate has limited capacity in explaining the variation in radial growth, while the size, competition among individuals and stand density are the main drivers to radial growth on the local scale.