桂花野生种群生命表及生存分析

为了研究福建省长汀县石峰寨风景区的桂花种群动态和数量特征，该文以种群生命表及生存分析理论为基础，编制桂花种群静态生命表，绘制存活曲线、死亡率曲线、亏损率曲线、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，桂花有1个死亡高峰，存活曲线趋于Deevey Ⅱ型；并应用谱分析方法研究桂花种群动态，结果表明，在桂花种群自然更新过程中存在着明显的周期性. 桂花种群在群落中占优势地位的原因与其生物学特征、丰富的种子库、适宜的环境条件等有关. 

Life table and survival analysis of Osmanthus fragrans wild population

In order to study the population dynamic and quantitative characteristics of Osmanthus fragrans in Shifengzhai of Changting County, Fujian Province, based on the life table of population and the theory of survival analysis, a static life table of O. fragrans was worked out and the curves of survival, mortality rate, lose rate mortality density function, cumulative mortality function, as well as risk rate function were drawn in this paper. Meanwhile, the life process of O.fragrans population was analyzed. Results show that the population has one peak of mortality, and survival curve of the population trends to the type of Deevey_Ⅱ. Then spectral analysis of the population dynamics of O. fragrans was made, which shows that there is a marked regularity of periodic fluctuation in the process of natural regeneration of O. fragrans. Moreover, the reasons that the population dominated in the community are related to the biological characteristics and abundant seed pool of the population, appropriate surroundings, etc.