Abstract: Based on field investigation,the species compositions of plant community in Xiaoyanwan garden of Xingwen block-sea were analysed.There are 90 species plants belonging to 82 genera of 48 families,among which the species of Tiankeng is the richest,75 species;the three corroded depressions have 52 species;and the species in Monkey Lake is the least,only 12 species.Shannon diversity index was used to do a comparative study on the species diversity of the five plant communities.The Shannon index H' of the five plant communities is ranked from high to low as follows:4.056 of Tiangkeng,2.882 of the No.1 corroded depression,2.878 of the No.2 corroded depression,2.821 of Monkey Lake,and 2.258 of the No.3 corroded depression.Some suggestions for further researches on the vegetation and plant community in deserted regions and some protection efforts for the vegetation in this area were put forward.

Key words: Xingwen block-sea, Xiaoyanwan Garden, plant communities, species composition, species diversity

摘要： 通过野外调查,对世界地质公园四川兴文石海的小岩湾代表性园区植物群落物种组成进行统计分析,结果表明,该园区共有植物48科82属90种,其中天坑物种最丰富(75种),3个溶蚀洼地52种,猴子潭种类最少(12种)。采用香农指数对几个植物群落物种的多样性进行比较,香农指数H'由高到低依次为:天坑(4.056) >溶蚀洼地Ⅰ(2.882) >溶蚀洼地Ⅱ(2.878) >猴子潭(2.821) >溶蚀洼地Ⅲ(2.258),表明天坑物种多样性指数最高,溶蚀洼地Ⅰ和Ⅱ其次,猴子潭地区物种多样性较低,溶蚀洼地Ⅲ最低。建议对石漠化地区植被和植物群落进行深入研究,同时加强对该区植被的保护力度。

关键词: 兴文石海, 小岩湾园, 植物群落, 物种组成, 物种多样性