塔里木盆地硬枝碱蓬群落物种组成和生物多样性

野外调查新疆塔里木盆地硬枝碱蓬（Suaeda rigida）群落的物种组成，分析其伴生种的区系成分，并进行物种多样性测度，结果如下：1）硬枝碱蓬群落物种组成仅有维管束植物9科21属26种，其中藜科植物为主要成分，占38.5%；2）硬枝碱蓬群落伴生种的分布类型以旧世界温带分布及其变型和中亚分布居多，分别占36%和24%；3）硬枝碱蓬群落物种多样性指数Margalef丰富度指数为0.52～0.87，Shannon Wiener指数为0.42～1.11，Simpson指数为0.20～0.66，J均匀度指数为0.34～0.84，符合荒漠地区的物种多样性的分布规律。

Plant component and species diversity of Suaeda rigida community in the Tarim Basin

A field survey was conducted to determine the plant community,flora of associate species and species diversity of Suaeda rigida community in the Tarim Basin.The results of this study showed that 26 vascular plant species,belonging to 21 genura and 9 families,were identified,in which plants from Chenopodiaceae accounted for 38.46%.From distribution patterns,the Old World Pattern and its variants was 36% and Central Asian Patterns was 24%.The Margalef,Shannon-Winner and Simpson index of S.rigida community was 0.52~0.87,0.42~1.11 and 0.20~0.66,respectively,and evenness index was 0.34~0.84,and this followed the distribution rule of desert area.