福建邵武将石地区维管束植物区系分析

福建邵武将石地区的植物区系处于泛北极植物区,中国-日本森林植物亚区的华东地区,有维管束植物173科461属915种(含种下单位).该区植物种类丰富,具有许多珍稀、古老、孑遗植物成分.在科、属水平上对其区系特征进行了分析,结果表明:热带分布类型的科占绝对优势,共77科,占53.1%;温带分布类型有37科,占25.5%;属的区系成分中,属的热带分布类型计197属,占区总属数的52.2%,温带分布类型共有169属,占44.9%.可见该植物区系的热带、亚热带成分占主导地位,温带成分次之.聚类分析结果表明该地区种子植物区系成分和庐山自然保护区关系最为密切,鼎湖山自然保护区次之,和五台山自然保护区的差异较大,这主要由它们生态地理条件、区系成分组成的差异所决定.

Analysis on the Flora of Vascular Plants in Jiangshi Region,Shaowu,Fujian

The Jiangshi Region is located in Shaowu City in Fujian Province and belongs to the East China Region,Sino-Japan forestry subkingdom,Holarctic kingdom.There are 915 species(including infraspecific taxon) in 173 families and 461 genera of vascular plants in this region.The flora is rich in plant species and there are lots of rare,precious and ancient plants components.The characteristics of the flora from different standards of the families and the genera were analyzed.The results show that the tropic distribution-type makes significant dominant,which has 77 families and makes 53.1% in total families,the temperate distribution-type is secondary,which has 37 families and makes 25.5% in total families.In the level of genera,the tropic distribution-type,having 197 genera,accounting for 52.2% in total genera,the temperate distribution-type is next to the tropic distribution-type with 169 genera,accounting for 44.9% in total genera.It is obvious that the tropic and subtropic elements were the dominant composition,the temperate element were the second.As shown by the clustering analysis,there is higher homogeneity and closely relationship between the floristic elements of Jiangshi Region and Lushan Nature Reserve,and some similarity between that of Dinghushan Nature Reserve and Jjiangshi Region.However,there are some significant differences between that of Wutaishan Nature Reserve and Jiangshi Region.The main reasons for those are resulted from the differences between their eco-geographic conditions and floristic elements.