色季拉山区高山寒带种子植物区系研究

通过对西藏色季拉山高山寒带进行实地野外调查,鉴定统计得到种子植物285种,分属于33科103属,其中双子叶植物有26科、77属、236种,裸子植物有1科、1属、4种,中国特有植物125种。对该区域种子植物区系从科、属、种三级水平统计分析,初步探讨了其植物区系的性质和基本特点。地理成分简单,但特有现象明显,在种类上缺乏古老、原始的类型;从科、属和种的分布类型统计分析,基本上都是温带成分,反映出典型的温带区系特征和区系的年青性,因而具有高寒区系的显著特色。在区系成分中存在较多中国-喜马拉雅成分,表明了该区系具有明显的高原及高山植物区系的特色。

Study on Spermatophyte Flora of the Alpine Frigid Zone in Shergyla Mountain of Tibet

Scientific survey and identification of plant species indicate that the seed plants are made up of 285 species(which belong to 103 genera and 33 families) in the alpine frigid zone in Shergyla Mountain of Tibet.Among them there are 236 species in 26 families,77 genera of dicotyledons and 4 species(in 1 families,1 genus) of gymnospermae,and 125 species endemic to China.Based on the analysis of the floristic elements from the levels of species,genus and family rank,the results show that:the flora is simple in geographical elements,evident in endemism,and lacking of the ancient and primitive forms in composition.On the analysis of family,genus and species area-types,the component of this flora is basically composed from temperate ones.It shows that the flora is not only of typical temperate character,but also of youthful character,so the flora is a typical alpine frigid one.Owing to the elements in the flora are mainly of Sino-Himalayan ones,so the flora is obviously with plateau and alpine floristic features.