山西云蒙山油松种群的年龄结构和动态特征

THE AGE STRUCTURE AND DYNAMIC FEATURE OF PINUS TABULAEFORMIS POPULATION IN YUNMENG MOUNTAIN, SHANXI PROVINCE

本文用样方法研究了山西云蒙山油松种群的年龄结构、存活曲线和数量动态规律,并且讨论了油松种群数量动态和群落演替的关系,结果表明:油松种群具有增长型和衰退型的动态特征,影响油松种群数量的内在机制主要是种内光资源的竞争。尽管大多数油松种群处于不断衰减状态,但其群落结构及性质在较长时期内将不会发生显著的变化。

In this paper, the age structure, survival curve and the rule of numerical dynamics of Pinus tabulaeformis population in Yunmeng Mountain, Shanxi Province are studied by using quadrat method, moreover, the relationship between numerical dynamics and community succession is discussed. The result indicated : P. tabulaeformis population has the dynamic feature of increasing and decreasing type, inner mechanism effecting its numerical dynamics is result from light resource competetion of intraspecies. Though the bulk of the P. tabulaeformis population is being continuous decrease, the community constructure and characteristic of it has not significantly changed in longer time.