【摘要】 利用种群统计中的年龄结构,静态生命表和波谱分析的方法,对甘肃小陇山沙坝林业实验基地和麦草沟自然保护区中的锐齿栎种群结构动态进行分析,结果表明该种群年龄结构为衰退型。而静态生命表分析显示锐齿栎种群的存活曲线为DeeveyⅡ型,死亡率曲线有两个高峰;谱分析结果表明在锐齿栎种群自然更新的过程表现出明显的周期性。更多还原

【Abstract】 Field data were obtained from thirty 20 m×20 m plots in Shaba and Maicaogou of Mt.Xiaolongshan in Gansu. Based on the data obtained in the field,structure of Quercus aliena var.acuteserata population were analyzed through age structure,static life table,survival curve and spectral analysis in Xiaolongshan,Gansu. The result revealed that the population age structure exhibited the characteristics of stable type,the curve of survival generally trended to the Deevey Ⅱ,and there were two peaks of mortality. At the same time,spectral analysis of the population dynamic of Q.aliena var.acuteserata showed that there was a marked regularity of periodic fluctuation in the process of nature Q.aliena var.acuteserata.更多还原