浙江大山峰种子植物区系的统计分析

据调查统计浙江大山峰野生种子植物140科524属1032种(含种下分类群)。科、属、种的分布区类型分析表明,科以泛热带分布最多(43.6%),其次是世界分布(20%)和北温带(18.6%),温带分布少于热带分布(35∶77);属以泛热带分布最多(22.9%),其次是北温带分布(17.4%)和东亚分布(17.0%),温带分布多于热带分布(237∶230);种以中国特有分布最多(44.4%),其次是东亚分布(21.0%)和热带亚洲分布(17.4%),温带分布明显多于热带分布(317∶252),显示大山峰植物区系处于温带和热带分布的过渡区,具亚热带性质和地理成分复杂的特征,且与日本植物区系有密切关系。通过与邻近诸山属种相似性系数比较,说明它们关系密切,属同一自然区系。

Statistics and analysis on the seed plant flora in Dashanfeng,Zhejiang

According to investigation and statistics,there are 1 032 species of wild seed plants,belonging to 524 genera and 140 families in Dashanfeng. The areal types of families,genera and species are analyzed respectively. The pantropic type of families reaches 43.6%,cosmopolitan type 20%,and north temperate one 18.6%,according to the statistics of plant families,which indicates that temperate elements are less than tropical ones (35∶77).The pantropic type is 22.9%,the north temperate type 17.4% and the East Asia one 17.0% at generic level. The temperate elements are slightly more than the tropical ones(237∶230). At species level, the endemic to china type reaches 44.4%,the East Asia type 21.0%,and the tropical Asia one 17.4%. The temperate elements are much more than the tropical ones(317∶252). The analysis also shows that Dashanfeng plant flora lies between the temperate zone and tropics, and it has the subtropical characters and the complicated geographical features,it has close relation with plant flora in Japan. Through the comparisons of similarity coefficients which are about genera and species between Dashanfeng and adjacent mountains,it is proved that Dashanfeng is closer to adjacent mountains,they should belong to the same natural flora.