四川卡娘自然保护区种子植物多样性及区系分析

Analysis on diversity and floristic of seed plants in Kaniang Nature Reserve Area, in Sichuan Province

卡娘自然保护区位于全球25个生物热点地区之一的横断山区北侧,青藏高原东北缘,具有低纬度、高海拔的特点,生物多样性丰富,气候变化大。通过对四川卡娘自然保护区进行种子植物调查,发现保护区有种子植物995种,分属于75科326属,其中裸子植物4科8属19种,被子植物71科318属976种。保护区在地理成分和科级水平上,可以划分为10个分布区类型,在属级水平上,可以划分为11个分布区类型。总之,保护区地理区系复杂,并且呈现出从热带向温带过渡的趋势。

Kaniang Nature Reserve Area is located on the north side of Hengduan Mountains and northeastern edge of the Tibetan Plateau with the characteristics of low latitude and high altitude, rich in biodiversity and large variation in climate condition, and is one of the 25 biological hotspots in the world. The survey of seed plants in Kaniang Nature Reserve Area revealed that there were 995 species belonging to 326 genera and 75 families including 4 families, 8 genera and 19 species of gymnosperms and 71 families, 318 genera, and 976 species of angiosperms. The analysis on geographical distribution type at the family level showed that there were 10 geographical distribution types on the family level and 11 geographical distribution types on genus level. The geographical distribution type in the Nature Reserve Area was complex, and it showed a trend of transition from tropical to temperate.