【摘要】 以梅花山自然保护区内拟赤杨种群的调查材料为基础,利用"空间代时间"、"横向导纵向"的方法编制拟赤杨种群的特定时间生命表,绘制了该种群的存活曲线、死亡率曲线,并用4个生存函数分析种群数量动态变化。结果表明:拟赤杨种群的死亡率呈波状起伏,出现两个死亡高峰,分别出现在Ⅴ～Ⅵ、Ⅸ～Ⅹ龄级的年龄阶段。种群存活曲线趋于Deevey-Ⅱ型,是稳定种群,引入生命表栏目中的几个函数能很好地说明种群的结构。种群生存分析表明,拟赤杨种群生存率函数单调下降,累积死亡率函数呈单调上升,说明拟赤杨种群幼年死亡率较高,长成之后,种群趋于平衡稳定。更多还原

【Abstract】 The age and stucture of Alniphyllum fortunei population in Meihuashan Natural Reserve were analyzed.The time-specific life table,the curves of survivorship,mortality rate and the four survival functions of the population were drawn.The population dynamics were also analyzed.The results showed that the survival curve could be described by Deevey-Ⅱ.The population had 2 distinct peaks of mortality,in Ⅴ to Ⅵ age class and Ⅸ to Ⅹ age class,respectively.It was shown that the two mortality peaks were due to several factors such as environmental damage.The population mortality rate was increasing all along,and the survival rate was decreasing all the time.Generally,the population grew up stably.The functions used in the static life table could well explain the structure and dynamics of Alniphyllum fortunei population.更多还原