北京林业大学学报Issue(5)：22-32,11.DOI:10.13332/j.cnki.jbfu.2014.05.007
基于广义可加模型的气候对单木胸径生长的影响研究
Impact of climate on individual tree radial growth based on generalized additive model
摘要
Abstract
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.关键词
气候变化/广义可加模型/单木胸径生长Key words
climate change/generalized additive model/individual tree radial growth分类
农业科技引用本文复制引用
余黎,雷相东,王雅志,杨英军,王全军..基于广义可加模型的气候对单木胸径生长的影响研究[J].北京林业大学学报,2014,(5):22-32,11.基金项目
国家自然科学基金项目(31270679)。 （31270679）
