四川洛须白唇鹿自然保护区种子植物区系分析

Flora of Seed Plants in the Luoxu White-lipped Deer Nature Reserve,Sichuan Province

在野外调查的基础上,分析了洛须白唇鹿自然保护区种子植物科、属的组成及区系特征,以期为该保护区的管理提供基础资料,并对保护区植物区系的起源做一定的探究。结果表明:洛须白唇鹿自然保护区共有种子植物68科277属904种,温带性质科占总科数的63.63%.温带性质属占总属数的89.17%,表明保护区植物区系具有明显的温带性质;对特有属的分析显示.保护区种子植物区系与横断山脉植物区系有密切联系;与其他地区进行聚类分析表明,保护区与阿坝漫则塘湿地自然保护区植物区系关系最近,与巫溪阴条岭自然保护区关系最远,这说明洛须白唇鹿自然保护区植物区系演化的重要推动力可能为青藏高原的剧烈隆升,另外,全新世气候变暖以及现代气候影响也可能是造成与其他地区不同的原因。

Based on the investigation of the vegetation and the collection of samples,the species composition and areal type of seed plants in the Luoxu White-lipped Deer Nature Reserve are analyzed.The paper aims to offer the basic data for the management of Luoxu White lipped Deer Nature Reserve and explore the origin of this flora.The results of the survey show that there are 904 plant species belong to 60 genera and 35 families in Luoxu White-lipped Deer Nature Reserve,in which the genera and families of temperate zone reach 63.63% and 89.17%,respectively.So the flora is of temperate type obviously.On the other hand,the analyses of endemic genera indicate that the flora of seed plants in Luoxu White lipped Deer Nature Reserve is closely related to Hengduan Mountains.The results of cluster analysis show that the flora of Luoxu White-lipped Deer Nature Reserve is closer to Aba Manzetan Wetland Nature Reserve,and far from Wuxi Yintiaolin Nature Reserve.It is argued that the flora of Luoxu White lipped Deer Nature Reserve and Aba Manzetan Wetland Nature Reserve are affected by the qualitative change in Tibetan Plateau and the climate change is caused by the qualitative change.The flora of Jiuzhaigou Nature Reserve is affected by the change of Tibetan Plateau,and the special geographical position also is a reason.Gexigou Nature Reserve is also affected by Quaternary Glaciation,and the geomorphological character of Hengduan Mountain also is a reason.Moreover,quaternary Glaciation and modern monsoon maybe bring up the flora of Luoxu,too.