玉舍森林公园十齿花群落学特征研究

Study on Community Characteristics of Dipentodon sinicus in Yushe National Forest Park

对贵州省玉舍国家级森林公园5 000 m2的稀有保护植物十齿花群落的特征进行了研究,结果表明:十齿花群落共有木本植物114种,隶属于47科84属,群落中优势科较明显,但属的组成较分散;十齿花群落物种丰富度为5.88,Simpson指数为0.84,Shannon-Wiener指数为2.45,种间相遇机率为84.02%,均匀度为67.56%;十齿花乔木层的平均重要值为135.69,远高于其他种群。群落的外貌和季相变化受十齿花的影响较大,表现出较明显的季相变化;群落的优势种群在不同程度上表现为集群分布;玉舍国家级森林公园十齿花群落植物区系成分表现为较明显的热带、亚热带向温带过渡的性质。

The community characteristics of Dipentodon sinicus in Yushe national forest park of Guizhou Province were analyzed. The results showed that in the 5 000 m^2 plot, there were 114 woody plant species, belonging to 84 genera and 47 families, in which, the dominant families were obvious, yet the components of genera were scattered comparatively. As far as Dipe.ntodon sinicus communities of Yushe national forest park were concerned, the species richness index was 5.88. The simpson index was 0.84. The Shannon-Wiener index was 2.45. The inter-speciflc opportunity was 84.02%. The evenness was 67.56%, And the mean important value of tree layer was 135.69, which was far higher than other species＇. Dipentodon sinicus had a great effect on the physiognomy and seasonal aspect of Dipentodon sinicus communities, which presented an obvious seasonal aspect. The dominant populations of Dipentodon sinicus communities showed aggregated distribution in various degrees. The floral geographic elements of Dipentodon sinicus communities in Yushe national forest park had the characteristics of transition from tropics and semi-tropics to temperate,