小秦岭自然保护区森林群落分类及林下植物多样性研究

Study on classification of forest community and diversity of understory plants in Xiaoqinling Nature Reserve

在河南省小秦岭自然保护区设立72块标准样地,通过对植物多样性的调查,采用双向指示种分析方法将其森林群落划分为7个类型,分析了不同群落类型中林下植物的多样性,探索了不同群落类型中林下植物多样性的差异,结果表明:阔叶林中植物物种多样性最大,物种丰富度、多度、Simpson多样性指数和ShannonWiener多样性指数均较高,只有物种均匀度指数较小;针阔混交林中林下植物物种多样性较高;3种针叶林中,油松和华山松植物多样性总体上比较相似,而秦岭冷杉中植物多样性则相对较小;灌丛矮曲林与针叶林相当;竹林中物种多样性普遍较低。

According to the investigations on plant diversity of 72 vegetation plots in Xiaoqinling Natural Reserve of Henan Province, the forest communities in the region were classified into seven types by method of two-way indicator species analysis, the diversity of under-story plants in different types of communities was analyzed, and the differences of under-story plants＇ diversity among different type communities were investigated. The results indicate that among the under-story plants of different type communities, the plant species diversity values（species richness, abundance, Simpson diversity index and Shannon-Wiener diversity index） in the broad leaved forest was the maximum（type V）, they were higher in mixed coniferous broad leaved forest（type IV） than those others, only the species evenness index was smaller; Three coniferous forest（type I, II, III） had moderate plants diversity, and these were similar to that of Shrub coppice forest（type VII）; the plant diversity valueof Abies chensiens community was relatively small; those of consumes brush and shrubs and bushes were equal to that of coniferous forest; that of bamboo forest was the lowest（type VI）.