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【目的】分析山西省黑茶山国有林管理局两种起源类型落叶松林径级和林层特征,并对落叶松种群空间分布点格局特征和种群对邻域物种多样性的影响效应进行研究。【方法】采用g(r)函数点格局方法对优势种群落叶松不同生长阶段个体(小树、中树和大树)的空间分布点格局进行研究;用单物种-面积关系模型(m ISAR模型)分析样地中乔木树种对局域群落多样性的影响。【结果】两种不同起源的落叶松林内落叶松种群呈单峰型,人工林和天然林小(Ⅰ、Ⅱ)、中(Ⅲ、Ⅳ、Ⅴ、Ⅵ)、大(Ⅶ、Ⅷ、Ⅸ)三个不同阶段的株数比约为10:3:4和10:3:6,树种多样性分别为0.96、0.54、0.52和1.27、0.94、0.63。两种起源落叶松林空间点格局分布总体上均表现为小尺度上的聚集分布和中大尺度上的随机分布。此外,两种起源的落叶松林内物种在调查尺度范围均表现为单物种所有个体对邻域全部树种的丰富度起到促进作用。【结论】长期的干扰使两种起源不同的落叶松林具有较为相似的水平结构和垂直结构,中径级林木个体多但小径级和大径级较少,种群难以实现世代交替。
【Objective】 The objective of this study was to analyze the characteristics of larch stand size and forest stand of two origins types in Heichashan Mountain State Forestry Administration of Shanxi Province, and to study the spatial pattern of larch population and the effect of population on the species diversity of neighborhood. 【Method】 The spatial distribution patterns of individuals (tree, tree and tree) in different growth stages of dominant species of Larix gmelini were studied by using g (r) function point pattern. The single species-area relationship model (m ISAR model Analysis of the impact of tree species on the diversity of local community in the sample plots. 【Result】 The results showed that the larch population of Larix principis-rupprechtii with two different origins was single-peaked, and the plantations (Ⅰ, Ⅱ), middle (Ⅲ, Ⅳ, Ⅴ and Ⅵ) The plant number ratios in three different stages were about 10: 3: 4 and 10: 3: 6, and the tree species diversity was 0.96, 0.54, 0.52 and 1.27, 0.94 and 0.63, respectively. The spatial distribution of spatial distribution of the two starting Larix gmelinii forests showed an aggregate distribution on a small scale and a random distribution on a large scale. In addition, species from the two origins of Larix gmelinii are all characterized by the abundance of all tree species in the neighborhood in the survey scale as all individuals of a single species contribute to their abundance. 【Conclusion】 Long-term disturbance made the two larch forests of different origins have similar horizontal structure and vertical structure. However, there were many individual individuals with medium diameter class but fewer diameter class and large diameter class, and the population was hard to achieve alternation of generations.