莽山自然保护区南方铁杉种群物种多样性和稳定性研究

利用30个样地资料，对莽山自然保护区的南方铁杉群落的物种多样性与稳定性进行了研究，结果表明：（1）5个群落的丰富度指数、多样性指数和均匀度指数均存在一定的差异，它们明显受群落类型与群落结构的影响，群落结构越复杂，物种丰富度指数与多样性指数就越大，均匀度指数就越小；（2）5个群落各生活型的物种多样性指数存在一定的差异，但是差异不一定具有统计意义；（3）利用改进的M.Godron稳定性测定方法测得的5个群落的稳定性都极低，而且与群落多样性之间没有明确的关系，这说明群落处于一定的动态变化之中。

The Species Diversity and Stability of Tsuga tchekiangensis Community in Mang Mountain Nature Reserve

[Objective]In the paper the study aimed to study the species diversity and stability of Tsuga tchekiangensis communities in Mang Mountain nature reserve.[Method]A set of data total 30 plots were used.[Results]The results showed that:(1)The differences of the richness indices,diversity indices and evenness indices among different communities were great,the diversity indices and richness indices of the plant communities were obviously affected by the type and structure of the communities,the more complicated of the structure,the bigger of the diversity indices and richness indices and the smaller evenness indices included;(2)There was a greater variation in species diversity among different life form,however,it was found that this variation was not always statistically significant;(3)The results of community stability calculated by improved M.Godron method were very low,furthermore,there is not a clear relation between the stability and the communities,this showed that the five types communities were all in the process of succession in various degree.[Conclusion]This study is important to protect Tsuga tchekiangensis community in Mang Mountain nature reserve.