湖北林业科技

To understand the structural characteristics, species diversity, and population status of the J. calhayensis community in the reserve, five fixed monitoring plots covering a total area of 4500m2 were established in the Nanhua County area of the Ailao Mountain Nature Reserve in 2021, surveys and analyses were conducted. The results showed the 141 species of vascular plants from 68 families, 116 genera were recorded in the J. calhayensis community by the analysis of the structural characteristics, species diversity and population status of J. calhayensis community.The vertical structure of the community was obvious, which could be divided into tree layer, shrub layer and herbaceous layer. J. calhayensis was the dominant tree species in the arbor layer, and Alnus nepalensis and Pinus armandii were the main associated tree species in the arbor layer. Dominant trees in the shrub layer were Nolhapodytes pillosporoides, J. calhayensis and Leucosceptrum canum. Senecio asperifolius, Oplismenus compositus var. compositus, and Stellaria vestita var. vestita belonged to the dominant species in the herbaceous layer.The herbaceous layer had the most abundant species, and the Shannon-Wiener index and Pielou evenness index were the highest. The Simpson index of the tree layer species was the highest, and the other diversity indices were the smallest. The Simpson index of shrub layer species was the smallest. The species diversity of each layer of the community was in order: the herbaceous layer > shrub layer > tree layer.The number of individuals in the J. calhayensis population in the jurisdiction fluctuates significantly across different age groups, with a higher number of seedlings and young trees, providing favorable conditions for their reproduction and renewal. Based on the results of this investigation, it is necessary to strengthen the protection of J. calhayensis community, and focus on the in-situ breeding and conservation of protective plants such as Emmenopterys henryi within these communities, so as to maintain the stable succession and species diversity.