安徽宁国板桥自然保护区甜槠种群结构动态与生命表分析

On the Population Structure and Life Table of the Endangered Population of Castanopsis eyrei in Banqiao Nature Reserve in Anhui Province

在对安徽宁国板桥自然保护区次生甜槠林群落调查的基础上,应用数量分析方法,绘制了群落优势种甜槠种群的径级结构分布图,编制了甜槠种群的静态生命表,并根据生命表绘制了标准存活曲线、死亡曲线以及两种生存函数曲线。研究结果表明,甜槠种群的标准生存曲线呈左偏正态型,即总体幼苗数虽较多,但Ⅰ龄级幼苗数则偏少。如该种群自然发展下去,将极有可能从稳定型转为衰退型。另外,通过对生存函数曲线研究还发现:宁国板桥自然保护区甜槠种群具有前期增长,中期减少,后期衰退的特点。

The paper, using the quantitative analysis, draws the size class structure and survival curve, the static life table, the curves of survivor ship, mortality rate of the population of Castanopsis eyrei in Banqiao Nature Reserve in Anhui province on the basis of community investigation. The results show that its survival curve could be left skewed type. Total number of the seedling is large, but there is few seedling in age class I . Going on a long-time, it will become declining type from stabling type. In addition, the curve of survivor ship shows that the population increases in the early, decreases in the middle and declines in the end.