神农架地区米心水青冈群落物种多样性特征

Species Diversity of Fagus engleriana Community in Shennongjia Area,Hubei Province

水青冈属(Fagus)植物是北半球温带森林的重要建群种,其中以米心水青冈(Fagus engleriana)分布最为广泛。以湖北神农架为研究点,采用标准样地调查法,应用物种丰富度、Shannon-Wiener指数、Simpson指数、均匀度指数对米心水青冈林群落物种多样性,群落结构特征进行研究。结果表明:乔木层Shannon-Wiener指数为2.55,Simpson指数5.31,均匀度指数0.70,Shannon-Wiener指数与Simpson指数的顺序为草本层>乔木层>灌木层。径级分布研究表明整个群落更新状况良好。

Beeches are important and dominant species in humid temperate forests in the Northern Hemisphere, is the most common species. The research plot was located in Shennongjia area of hubei province, which was in the northern part of the Fagus distribution region. The community diversity and the comparability indices of Fagus engleriana were studied by standard quadratic method and using the methods of species abundance, Shannon-Wiener index, Simpson index, Evenness index. The results showed that the Shannon-Wiener index of tree layer was 2.55. Species richness was highest in the herbaceous layer and the lowest in the shrub layer. The size-class of all species in the tree layer showed invert“J” distribution, which indicated that the community had rich sapling banks and regenerated well.