青海湖布哈河下游地区植物群落多样性研究

Plant Community Diversity in the Buha River Region of the Qinghai Lake Downstream Area

根据野外样方调查资料,对青海湖西部布哈河下游地区8种植物群落进行了研究。结果表明:群落的多样性随丰富度的降低而呈下降趋势,均匀度的变化受物种丰富度的影响不大,群落的物种多样性指数与丰富度指数和均匀度指数均表现出极显著的正相关性(P<0.01),相关系数分别为0.912和0.684;群落的均匀度与丰富度相关性不显著,说明物种多样性主要为物种丰富度所推动。

Based on the data resources investigated from the field sample, 8 community patterns in the Buha River region of the Qinghai Lake area were studied. The results showed that the community diversity have descent trend by species abundance, and species abundance almost had no effect to evenness. The significant positive correlation （P〈0.01）were existed between species diversity of community and the species richness and the species evenness. The correlation coefficient was 0.912 and 0.684 respectively. The correlation between community evenness and community richness was not quite significant, the interaction was little between the two indexes, which showed that species diversity was impuled by species richness.