辽宁白石砬子植物区系及与邻近区系的关系

采用区系调查、多样性指数、相关分析及数学聚类等方法,研究了白石砬子植物区系的特点及与邻近区系的关系.结果表明:(1)辽宁白石砬子保护区的植物种类丰富多样,共有维管植物114科,442属,1 056种；植物科、属组成优势现象明显；区系具有一定的古老性,但特有程度低；温带成分优势明显,热带成分比较少.(2)白石砬子区与邻近山地植物区系多样性比较,Shannon-Wiener指数差异明显(1.547～2.042),其中徂徕山和泰山较高,白石砬子、长白山和大兴安岭较低,而Simpson指数差异并不显著(0.711 4～0.818 9).(3)经相关性分析,不同山地植物区系之间相似程度显著,相关系数达到0.835～0.994.聚类分析支持长白与华北植物区系地理分界在凤凰山和白石砬子之间；建议加强植被管理和保护,维护和促进区域经济社会可持续发展和国家生态安全.

A Comparison of The Floras of Bashilazi Reserve and Adjacent Mountains

To investigated the vascular floristic characteristics of Baishilazi Natural Reserve in China,we conducted plot survey,diversity index,correlation analysis and cluster analysis.Our results showed that:(1)1 056 species of vascular plants (442 genera,114 families) were recorded in Baishilazi.It is abundant of species and notable in dominant family and genus phenomenon.The flora is ancient and has not obvious phenomenon of endemic species.The dominance of temperate elements is obvious and tropical elements are less.(2)Compared with adjacent mountains,floristic Shannon-Wiener index are obvious differences,while simpson index are not.Shannon-Wiener index of Mt.Tai and Mt.Culai are quite high,while the others are not.(3)According to the relativity of flora from different mountains,their correlation is significant at the 0.01 level,and the coefficients are between 0.835 and 0.994.Cluster analysis deduces that boundary of Changbai flora and Huabei flora is located between Baishalazi and Fenghuang Mountain.Vegetation should be protcted in order to make a good habitat environment for sustainable development and region ecological security.