中文摘要：

分析次生林群落中12个树种的空间格局，阐述树木种群空间分布与环境因子间的关系。结果表明：1）大多数环境因子和树种都表现出显著的正空间自相关，即存在空间聚集性结构；2）空间变异分割表明，环境因子主要制约幼树和小树的空间分布，而对大树影响较小；3）土壤水分和土壤pH值对树种分布影响较大，土壤营养（全氮、全磷和全钾）作用相对较小，土壤有机质、叶面积指数和光量子密度与树种空间变异之间无显著关系；4）在已知种群空间变异中，环境因子（包括环境变量单独解释部分、环境变量与空间变量交互作用部分）解释能力较低，而纯粹的空间变量（即空间变量单独解释部分）对种群空间变异具有较高的解释能力，说明一些未知的独立于环境因子的空间过程在树木种群空间格局的形成过程中发挥了重要作用。

英文摘要：

Spatial pattern of 12 tree species in a secondary forest was investigated, and the relationship between spatial distribution of trees and environment factors was analyzed. The results indicated： 1 ） Most of environment factors and tree species showed significant spatial autocorrelation, that is, there was a spatially clumped structure; 2） Variation partition analysis of the space indicated that environment factors regulated mainly the spatial pattern of saplings and young trees, however there was little effect of the environment factors on the distribution of big trees; 3） Soil moisture and soil pH value significantly influence on the distribution pattern of most tree species, and soil nutrition （including total N, total P, total K） showed slight effect on the distribution pattern; however, soil organic matter, leaf area index and PPFD had no significant effect on spatial variation of 12 tree species; 4） Environment factors hardly interpreted spatial variation of tree species （including variation interpreted by environment alone and variation interpreted by environment and space in common）~ In contrast, pure spatial variables exhibited stronger interpretation power, which suggested that some unknown spatial process or processes independent of environment factors might play an important role in the formation of spatial structure of tree species.