黑龙江省东部山区森林植物物种多样性的研究

Species Diversity of Forest Plants in Eastern Mountain Area of Heilongjiang Province

通过对黑龙江省东部山区原始阔叶红松林和次生林物种多样性的比较研究,结合定量化的群落动态和环境梯度,分析论证了演替阶段、环境梯度、生长状况及干扰与物种多样性的相关关系。结论如下:次生林物种多样性高于原始阔叶红松林,但均匀度较原始林小;物种多样性较高的群落其森林生产力中等,森林生产力较大的群落其物种多样性小;中度干扰的群落,其物种多样性较高,而重度和轻度干扰的群落,其多样性低;物种多样性指数从演替初期到中期不断增加,到演替后期逐渐下降。

The species diversity of virgin forests and secondary forests in eastern mountain area of Heilongjiang Province were studied composing with quantitative community dynamics. And we researched the relationship between community dynamics, environmental gradient, growth rate, disturbance of forest and species diversity. The results showed that species diversity of secondary forests is higher than that of virgin forest, but the evenness is lower. The forest productivity is middle in the community that the species diversity is higher, however, not only the productivity is the highest but also the species diversity is the lowest. The species diversity is the highest in the community of middle intensive disturbance. The species diversity indices are increasing from the initial stage to the middle stage of succession then decreasing in the climax stage.