木荷马尾松林更新层种群生态位分析

Study on species niche of Schima superba and Pinus massoniana artificial forest shrub layer

以重要值作为各植物种群的数量特征,从生态位宽度、生态位相似比例、生态位重叠等数量指标上分析了中亚热带木荷马尾松林不同恢复类型群落更新层种群的生态位特征。群落结构简单,物种丰富度较低,大多数树种的生态位幅度较大,其中木荷的生态位宽度较大,对其它种群的生态位重叠值也都较大,从一个侧面反映了森林生态系统演替趋势。这对于中亚热带营造针阔混交林和人工阔叶混交林的树种选择具有指导意义,也对进一步深入研究中亚热带人工生态林群落演替、稳定性和结构特征具有十分重要的意义。

Taking the important value as the amount characteristic of different populations, the species niche characteristics of shrub layer in different successional series of Schima superba and Pinus massoniana were analyzed with the indexes such as niche width, niche similarity proposition, and niche overlapping. The results showed that the community structure was simple, species richness was low, and the niche width of most species were wide. The width of S. superba was very wider which has more niche overlapping with other species. Some successional trends of forest ecosystem are reflected from all these to some extent. The study of significance choosed the species of planting coniferous and bread-leaved mixed forest and broad-leaved mixed forest in the mid-subtropical, and it was very import to further study on the community succession, stability and characteristics of structure.