香樟天然次生林种群空间分布格局及其关联性分析

An Analysis on the Spatial Distribution Pattern and Interspecies Correlation of Natural Secondary Forest of Cinuomomum Camphor

以香樟天然次生林群落为对象,应用点格局分析法研究其空间分布格局及种间关系,为香樟天然次生林的保护与利用提供理论依据,研究结果表明:香樟天然次生林群落空间分布在小尺度上表现为聚集分布,随尺度的增大变为随机分布。群落优势树种的空间分布格局大部分呈现随机分布,个别小尺度上有聚集分布现象,其种群空间分布格局与群落整体空间分布格局相似;香樟与其他优势树种间大部分尺度上表现为相互独立的无关联性,部分尺度上有正关联,与杨桐在小尺度上存在负关联性;对香樟幼树、中树、大树三个发育阶段间绝大部分尺度上无显著关联性,幼树与中树、大树间部分尺度呈显著正关联,中树和大树间小尺度存在负关联性;群落演替处在相对稳定状态。

To provide the theoretical and practical supports for the protection and utilization of natural secondary forest of cinuomomum camphor,a point pattern analysis method was performed to investigate the spatial distribution patterns and the interspecies relation of cinuomomum camphor in Minhou,Fujian Province. The results showed that the spatial distribution pattern of natural secondary forest communities of cinuomomum camphor was with random distribution pattern on a global scale,while with an aggretate distribution pattern on a small scale. In addition,the spatial distribution patterns for the dominant species are with similar patterns with the entire community. There were no corelations between the community of Cinuomomum camphor and the other dominant species on the global scales,while positive corelations were found on small scale. Further,there were no significant correlations among the young saplings,middle trees and big trees on the global scale. However,according to results on a small scale,there were significant positive correlations between the saplings and the middle and large trees,and negative correlations between the small trees and the small trees. Our study illustrated that the community succession natural secondary forest of cinuomomum camphor was kept at a relatively stable stage.