安徽省板桥山地植物物种多样性初探──兼论自然保护区的建立

A PRELIMINARY STUDY ON THE PLANT SPECIES DIVERSITY OF BANQIAO MOUNTAINOUS REGION IN NINGGUO COUNTY,ANHUI PROVINCE

板桥山地属于黄山余脉。据统计，该区有维管束植物154科，556属，1056种。其中，有17种为国家级珍稀濒危保护植物。该区植物种类丰富，其维管束植物科、属、种的密度分别为2．3个／km2、8．3个／km2、15．7个／km2，与黄山、九龙山不相上下。这里的区系成分复杂，起源古老，并具有一定的过渡特性。通过对分布在该区的中国特有属植物的分析，认为其历史成因占主导地位，而生态成四次之。在探讨该区物种多样性的基础上，阐述了建立板桥自然保护区的必要性和迫切性。

Banqiao Mountainous Region (BMR) belongs to the extention of Mountain Huangshan. In BMR there are 1 056 species of vascular plants, belonging to 556 genera and 154 families. Seventeen of these plants are the rare and endangered plants protected by law in China. The density of family, genera and species in BMR are respectively 2. 3/km2, 8. 3/km2, 15. 7/km2, which are very similar to Mt. Huangshan and Mt. Jlulongshan. The flora of BMR shows complex, transitional and ancient characteristics. According to the analysis of chinese endemic genera in BMR, the origin of them is mainly historical reason rather than ecologial reason. Based on tile spedes diversity and other reasons, the author thinks it necessary an(l urgent to establish Banqiao Nature Preserve.