长白山黄檗种群结构

Population structure of Phellodendron amurense in Changbai Mountains of Northeast China

通过对长白山黄檗种群的调查,采用空间代替时间的方法,以种群径级结构代替年龄结构,对黄檗种群的年龄结构、静态生命表和种群时间动态预测进行了分析。结果表明:阔叶红松林中黄檗种群主要依靠中老龄植株维持,幼龄个体严重缺乏;白桦次生林中黄檗植株龄级较阔叶红松林幼龄,但仍然存在幼树缺乏现象;长白山黄檗种群的存活曲线基本属于偏正态Deevey Ⅲ型,总体呈现衰退趋势;种群时间动态预测显示,随着黄檗老龄个体短暂增多后的逐渐减少,黄檗种群逐渐衰退。因此建议,立足现有种群的维持保护上,研究黄檗濒危机制,采取适当人工抚育措施,保证种群持续稳定发展。

An investigation was conducted on the populations of Phellodendron amurense in Changbai Mountains of Northeast China. By the method of substituting time with space, and tak- ing trunk size structure in place of age structure, an analysis was made on the age structure, stat- ic life table, and dynamics of the populations. In broad-leaved Korean pine forest, P. amurense population was maintained largely relying on the aging individuals, and was in short of the seed- lings. In Betula platyphylla secondary forest, P. amurense population was relatively young but still with a seedling lack. The survive curves of the P. amurense populations in Changbai Mountains belonged to Deevey type III, showing a declining trend. The time series prediction for the populations indicated that with the decrease of old individuals after their transient increase, the P. amurense populations would be finally declined. It was suggested that appropriate artificial measures in considering of the endangered mechanisms should be adopted to ensure the continu- ous and steady growth of the P. amurense populations.