四川省格西沟国家自然保护区草本植物区系研究

在对四川省格西沟国家级自然保护区进行详细考察的基础上,结合文献资料,分析了格西沟保护区野生草本植物区系特征。结果表明:1.四川格西沟国家级自然保护区草本植物多样性较高,类型丰富,保护区内有草本植物56科,305属,794种;2.格西沟自然保护区内草本植物地理分布类型较为丰富,涉及种子植物所有属的分布类型(15个),其中温带分布类型所占比例最大,占总属数的64.91%,其次为世界成分和热带成分,分别占16.72%和11.80%;从科的分布类型来看,本保护区草本植物涉及种子植物12个科的分布类型,其中温带分布和世界广布占比最大,各占总科数的14.29%,其次为泛热带分布和东亚及北美间断分布型,各占总科数的12.50%和10.71%,体现了该保护区草本植物较为明显的温带性质;3.保护区内草本植物除所含单种科属较多外,还含有大量的特有种和特色草本资源。

Analysis of the Herbaceous Angiosperms Flora in Gexigou Nature Reserve in Sichaun

Based on close investigation and related data, the floristic characteristics of wild herb plants were analyzed for Gexigou National Nature Reserve of Sichuan.The results showed that (1) the floristic composition was abundant with various types, containing 794 wild herb angiosperms that belonged to 305 genera and 56 families.(2) Geographic distribution types of genera were abundant (including 15 distribution types of genera), and the temperate components was dominant, following by the world and tropical components, which accounted for 64.91%, 16.72% and 11.80%, respectively. In view of geographic distribution of families, the temperate and the world components accounted for the largest proportions (14.29%), following by the pantropic (12.50%) and East-Asia and North America disjunct (10.71%) components. These results indicated a obvious temperate characteristics.(3) With the exception of many families and genera possessing single species, there were abundant endemic genera and characteristic plants in the Gexigou Reserve.