南岳衡山种子植物区系地理分析——南岳衡山植物区系研究(二)

Floristic geographical analysis of seed plant in Nanyue Hengshan

采用查阅资料和线路调查与样地调查相结合的方法,研究南岳衡山种子植物区系的地理成分,结果表明:南岳衡山有种子植物164科中有12个分布型8个变型,692属中有14个分布型18个变型,1 572种中有14个分布型和非中国特有种的11个变型以及中国特有种的13个变型;类群分布型及变型组成复杂,联系广泛,以属的分布型组成的复杂性和联系的广泛性最明显;不同分布型对不同分类群区系地理属性的影响程度不一样;14、9、3、7和8分布型的属,15、8和14分布型的种对植被组建影响较大。种子植物区系科、属、种的世界广布成分由科的33.54%到属的8.52%,再到4.58%;除世界广布以外,热带成分占总类群数的比例由科的62.38%到属的46.29%,再到种的25.67%;温带成分由科的37.61%,到属的53.71%,再到种74.33%。区系中科以热带成分为主,属的热、温带成分基本平衡,种以温带成分为主。现代种子植物区系为典型亚热带性质,表现出华东植物区西部地区的植物区系特点;区系中有1个中国特有科16个中国特有属533个中国特有种,其中湖南特有11种,衡山特有1种。

Based on field and plot investigation combined with consulting relevant documents,the floristic geographical element of seed plant in Nanyue Hengshan was studied.The results showed that there were 164 families of seed plant,which could be grouped into 12 distribution types and 8 subtypes.Among them there were 692 genera grouped into 14 distribution types and 18 subtypes,1572 species grouped into 14 distribution types,11 subtypes of China non-endemic species and 13 subtypes of China endemic species.The type of distribution and change of seed plant groups especially that of the genera was complex and the relation between them was extensive.The effect of different distribution types on the geographical property of flora was different.The genera distributional type of 14,9,3,7 and 8,and the species distributional type of 15,8 and 14 had the most effect on elements of vegetation.Proportion of widespread element of family held 33.54% while that of genera held 8.52% and that of species held 4.58%.Proportion of tropical element of family held 62.38% while that of genera held 46.29% and that of species held 25.67%.Proportion of temperate element of family held 37.61% while that of genera held 53.71% and that of species held 74.33%.The most element of family was tropical,the element of genera was both tropical and temperate,and the most element of species was temperate.The flora of seed plant was typically sub-tropical and the floristic characteristic was of west East-China.There were 1 family,16 genera and 533 species of endemic in China,among them 11 species of endemic in Hunan and 1 species of endemic in Nanyue Hengshan.