江苏溧阳紫楠群落结构及物种多样性特征

Community Structure and Its Species Diversity of Phoebe sheareri in Liyang of Jingsu Province

探究溧阳紫楠天然群落的层次结构、物种多样性及稳定性特征,可为宜溧山区紫楠天然种群的保护提供指导,为紫楠在城市绿化中的运用提供参考。文章结合溧阳市生物多样性本底调查项目,基于10个20 m×20 m的调查样地,运用生态学有关研究方法对溧阳紫楠天然群落特征进行分析。结果表明:溧阳紫楠天然群落共有维管植物39科64属70种,其中种子植物34科57属63种,蕨类植物5科7属7种;群落垂直结构明显,紫楠、毛竹等为群落优势种;种子植物区系成分以热带性质为主;群落物种多样性总体表现出灌木层最大、草本层次之、乔木层最小的特征;该群落仍处于不稳定的状态。

This study on the hierarchical structural, species diversity and stability of Phoebe sheareri community in Liyang can provide guidance for the protection of the natural Phoebe. sheareri community in Yili mountainous area and also provide reference for the application of Phoebe sheareri in urban greening. Based on the 10 20 m×20 m survey samples for the Biodiversity Survey Project of Liyang City, the paper adopts research methods related to ecology to analyze the characteristics of the Phoebe sheareri community. The results show that there are 70 species of vascular plants belonging to 64 genera and 39 families in the natural Phoebe sheareri community, among which there are 63 species of seed plants from 57 genera and 34 families and 63 species of ferns from57 genera in 5 families, and the community has obvious vertical structure with Phoebe sheareri and Phyllostachys edulis the dominant species. The floristic components of seed plants are mainly tropical, and the species diversity of the community presents the characteristics that the shrub layer is the largest, followed by the herbaceous layer and the arbor layer. The community is still in an unstable state.