浙江百山祖自然保护区种子植物区系分析

统计分析了浙江庆元百山祖自然保护区的种子植物区系。该区共有种子植物 16 7科、70 0属、 15 45种 (含种下分类群 )。科的分布区类型以泛热带分布最多 ,达 33 5 % ,热带分布的科多于温带分布的科 (75 4 4) ,16个表征科中 ,大多也是以热带分布的科 ;本区以单种属和寡种属为主 ,属的分布区类型以泛热带分布最多 (2 0 2 % ) ,其次是北温带分布(13 9% ) ,热带分布与温带分布的属几相当 (30 4 317) ;种的分布区类型以中国特有种最多(4 8 4 % ) ,其次是东亚分布 (2 3 9% )和热带亚洲分布 (13 6 % )。以中国区系分区标准 ,将特有分布种划分成 9个分布亚型 ,其中以华东 -华中 -华南分布最多 (2 5 9种 )。百山祖自然保护区种子植物丰富 ,区系起源古老 ,地理成分多样 ,具有明显的华东南缘山地植物区系特征 ,并且拥有众多特有、珍稀濒危植物

The Floristic Analysis of Seed Plants in Baishanzu Nature Reserve from Zhejiang Province

The flora of seed plants in Baishanzu Nature Reserve in Zhejiang is analyzed in this paper.1545 species,which belong to 700 genera in 167 families are in this reserve totally.At family level,the proportion of the pantropic type is bigger than others and reaches 33.5%,the tropic elements are more than temperate ones (75/44).At genus level,651 genera,which include only 1 species or 2-5 species,occupy 1094 species.The pantropic type is 20.2% and the temperate type is 13.9%,it is almost equivalent between the tropic elements and the temperate ones (304/317).At species level, the endemic to China type reaches 48.4%,much bigger than the East Asia type (23.9%) and the tropic Asia type(13.6%).Based on the subarea of China,the endemic species to China can be divided into 9 subtypes,and the subtype of East China-Central China-South China holds the biggest proportion (259 species).The seed plants of Baishanzu Nature Reserve are very rich.The floristic origin is ancient,geographical components are multiform and the characteristics is obviously upland flora on the southern edge of East China.The reserve also has many endemic,rare or endangered species.