Study on Community Characteristics of Endangered Davidia Involucrata Species in Mount Emei

In this study, a field investigation was conducted in the distribution area of Davidia involucrata community at an altitude of 1500-1800 m in Mount Emei. Five sample plots with a total area of 2 000 m² were set up, focusing on community structure, age structure and vertical distribution of Davidia involucrate in this area. The results showed that: (1) There are 147 species of higher plant species in Davidia involucrate community, belonging to 68 families and 102 genera. The life form of the community is dominated by phanerophyte (40.5%), leave size by mesophyll (53%), leave type by single leaf (79.5%), and leaf texture by papery (77%). The analysis of important value of tree layer showed that Davidia involucrata had the highest dominance in the community. (2) In Davidia involucrata population, the number of middle-aged individuals was more, while the number of young and old individuals was less, showing spindle-shaped structure. The results indicated that the population was declining. (3) According to the vertical distribution, Xianfeng Temple with the highest elevation had the largest number of adult individuals and seedlings.