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应用 α和 β多样性指数及聚类分析 ,探讨河北省围场县红松洼自然保护区在不同管理条件下的变化规律。结果表明 ,聚类分析将 1 5个样地划分为 5个组。在α多样性方面 ,以个体数为基础和以重要值为基础的多样性测度结果一致 ,最小多样性、最小均匀度、最小丰富度和最大生态优势度出现于核心区和缓冲区的中央。α多样性、均匀度和丰富度的最大值 ,以及生态优势度最小值出现在 3个区的过渡地带。该地区 α多样性最重要的影响因素是草地管理方式。在β多样性方面 ,该地区不存在位置上的环境梯度 ,生境破碎化程度较大。物种替代速率最快的是缓冲区与核心区的过渡地带 ,最慢的是在缓冲区的中央
Using α and β diversity index and cluster analysis, the variation of Hongsongwa Nature Reserve in Weichang County of Hebei Province under different management conditions was studied. The results showed that the cluster analysis divided 15 plots into 5 groups. In the aspect of α diversity, the results of diversity measure based on individuals and based on importance values are consistent, and the minimum diversity, minimum evenness, minimum richness and maximum ecological dominance appear in the central area and the buffer area. The maximum value of α diversity, evenness and richness, and the minimum value of ecological dominance appeared in the transitional zone of 3 districts. The most important influencing factor for α diversity in the region is grassland management. In terms of β diversity, there is no location-based environmental gradient in the area, and habitat fragmentation is greater. The species replacement rate is the fastest buffer zone and the core area of the transition zone, the slowest in the buffer zone