Abstract:
Based on detailed field investigation and species identification of vascular plants in damaged habitats of rare protected animals in Jiuzhaigou earthquake-stricken areas, the floristic composition and characteristics of wild vascular plants were analyzed and studied. The results showed that: (1) There were 89 families, 279 genera and 580 species of vascular plant species in the flora, among which Compositae, Rosaceae and Gramineae contained more species. (2) The oligodecific families, monotypic genera and oligodecific genera were the main parts of the flora, and the floristic composition structure was complex. The dominance of the plurimotypic family and oligodecific genera were higher in species composition, accounting for 35.17% and 52.94% of the total species. (3) The distribution types of vascular plants were diverse, and there were 15 distribution types in the floristic components of the genera, among which the proportion of the cosmopolitan types was relatively small, with tropical types accounting for 19.01% and temperate types accounting for 78.93% of all the genera. The North Temperate type (91 genera) was the main distribution type, which reflected the remarkable temperate nature of flora. (4) At the genera level, the flora was characterized with a certain amount of Chinese endemic components.