淡竹种群生活史特征和空间分布格局分析

Life History Characteristics and Spatial Pattern Analysis of Phyllostachys glauca McClure Population

从静态生命表、年龄结构图、存活曲线3个方面分析了河南洛宁淡竹种群的生活史特征,选用丛生指标、Moristia指数、负二项指数3个参数分析了淡竹空间分布格局。结果表明:静态生命表中生命期望值随龄级增大而逐渐降低反映出该种群的生存力逐渐下降的态势;物种生物学因素是影响淡竹种群生存力最主要的因素;淡竹种群的存活曲线更趋于DeeveyⅡ型;空间分布格局分析表明淡竹种群1年生、2年生的淡竹个体表现为集群分布,3年生以上的个体表现为均匀分布。

The life history characteristics of Phyllostachys glauca McClure population in Luoning City,Henan Province were analyzed from the aspects of static life table,age structure,and survival curve.Its spatial distribution pattern was analyzed through index of clumping I,index of Moristia and negative binomial parameter K.The results showed that the gradually decreased expected life value in static life table reflected the declining trend in the viability of the population.Biotic factors were the most important factors affecting the viability of Phyllostachys glauca McClure population.The survival curve of Phyllostachys glauca McClure population tended to the type of DeeveyⅡ.Study of spatial distribution pattern revealed that the individuals of annual and two-year-old showed a clustered distribution,while the three-year-old individuals showed even distribution.