Analysis of the Floristic Characteristics of Seed Plants in Yanqi Basin, Xinjiang

Yanqi Basin is located in the middle of the Tianshan Mountains in Xinjiang, China. In terms of geographical division, the vegetation in this region belongs to the warm temperate shrub and subshrub desert area of Xinjiang. The unique natural geographical location and ecological environment of this region have led to abundant plant species. Studies on the distribution and diversity of the flora in Yanqi Basin are very important for the use, sustainable development and protection of plants in this region. Based on field studies and relevant literature, the diversity and flora of seed plants in Yanqi Basin were systematically analyzed. Results showed there were approximately 1035 species of seed plants belonging to 80 families and 373 genera in Yanqi Basin. Among these, 38 species were endemic to this region, accounting for 14.18% of total endemic species in Xinjiang. The 80 seed plant families could be divided into six types and seven subtypes. North temperate elements (22 families) were dominant in family floristic composition, accounting for 57.89% of total non-cosmopolitan families. In terms of the floristic geographical distribution type, 373 genera of seed plants could be divided into 12 types and 17 subtypes, with temperate elements (197 genera) accounting for 62.54% of total non-cosmopolitan genera. Herbaceous seed plants (901 in total) were the dominant type in Yanqi Basin, accounting for 87.05% of total seed plant species in this region. There were 110 shrub species (10.63%), 17 tree species (1.64%) and seven vine species (0.68%). In terms of the ecological types of seed plants in Yanqi Basin, there were 676 mesad species, 191 siccocolous species, 123 hygrophyte species and 45 aquatic species, accounting for 65.31%, 18.45%, 11.88% and 4.35% of total seed plants in this region, respectively.