择伐干扰对长白山阔叶林中水曲柳及其伴生树种分布格局及种间相关性的影响

Influence of Selective Cutting Disturbance on Spatial Pattern and Spatial Correlation of Manchurian Ash(Fraxinus mandshurica Rupr.) and Associated Species in Changbai Mountains

[目的]研究择伐干扰对水曲柳自身的生长及其伴生树种的影响,为水曲柳的保护提供理论依据。[方法]运用空间点格局分析方法,分析择伐干扰对树种空间分布格局及空间关联性的影响。[结果](1)轻度择伐对椴树、红松、水曲柳分布格局影响不大,对色木槭和榆树分布格局改变明显;重度择伐对水曲柳、椴树、红松分布格局影响较大。(2)轻度择伐对水曲柳与椴树、红松、榆树种间关系影响不大,但对水曲柳与色木槭种间关系影响较大。[结论]轻度择伐主林层中的水曲柳有助于改善种群结构,对于水曲柳与椴树、红松种间关系改变不明显,但是重度择伐有助于阔叶树种椴树的的生长,但不利于处于更新层中针叶树种红松的生长。

[Objective] To study the selective cutting effects on the growth of Manchurian ash and its associated species,and provide theoretical basis for the protection of Manchurian ash.[Method] Using the spatial point pattern method,the influence of selective cutting on spatial pattern and spatial correlation among tree species was analyzed.[Result] 1.Mild intensity selective cutting showed little effect on the spatial pattern of Tilia,Korean pine,Manchurian ash,and significant effect on that of Acer mono and Elm ; meanwhile high intensity selective cutting had more effect on that of Tilia,Korean pine,Manchurian ash.2 Mild intensity selective cutting had little effect on the spatial correlation between Manchurian ash and Tilia,Korean pine,Elm,respectively,whereas a greater impact on the spatial correlation between Manchurian ash and Acer mono.[Conclusion] Cutting Manchurian ash in mild intensity helps to improve the population structure,but shows little variation in spatial correlation between Manchurian ash and Linden,Korean pine.Cutting in high intensity contributes to the growth of broad-leaved tree Tilia,but does not to the growth of Korean pine in regeneration layer.