珍稀濒危植物南方铁杉种群动态研究

Study on the Dynamics of the Endangered Plant Population of Tsuga tchekiangensis

摘要: 以种群生命表及生存分析理论为基础,编制南方铁杉种群静态生命表,绘制存活曲线、死亡率曲线、亏损度曲线、死亡密度函数曲线、积累死亡函数曲线和危险率函数曲线,分析种群生命过程。结果表明,南方铁杉有一个死亡最低峰,存活曲线趋于Deevey-Ⅱ型。并应用谱分析方法研究南方铁杉种群动态,结果表明,在南方铁杉种群自然更新过程中并没有表现出明显的周期性。

Abstract: Based on the life table of population　and the theory of survrival analysis,the authors worked out a static life table of Tsuga tchekiangensis,drew the curves of mortality rate,survival rate,killing value,survival rate function,mortality density function,cumulative mortality rate and hazard rate function,and analyzed the life process of population.The results showed that the population had one valley of morality,and the survival curve of the population trend to the type of Deevey Ⅱ.Then spectral analysis of the population dynamics of T.tchekiangensis was made,which showed that there was not a marked regularity of periodic fluctuation in the process of natural regeneration of T.tchekiangensis.