摘要
以样地调查数据为基础，应用方差与均值比率、负二项分布参数Ｋ、最近邻距离等多种方法，对不同生境、不同年龄的榛子种群空间分布格局及其动态进行了分析、测定，同时对分析结果随取样面积不同而变化的原因进行了分析讨论。结果表明，三种生境类型下的榛子种群均为集群分布，随年龄的变化逐渐向泊松分布型过渡。不同取样面积的分析结果反映了种群内各级丛块的格局类型。
Base on sampling data of plots,the dispersion pattern and its dynamics of Corylus heterophyllapopulation on the different habitat and age are analysed and tested by means of the methods of S2 Ratio,negative binomial distribution parameterk,nearest-neighbor distance,etc.The reasons why the analysis re-sult vary with area of plot are approached.The result is that Corylus heterophylla populations growing on alldthree sites are clumped,and become random step by step with age increasing and the result under certainarea of plot reflect dispersion type of certain block class in the population.
基金
吉林省教委青年科学基金
关键词
榛子
空间格局
取样面积
Corylus heterophylla populution,dispersion pattern,area of plot
