竹类侵扰下的四面山南方红豆杉群落物种多样性研究

Species diversity of Taxus chinensis var.mairei community in Simian Mountain under the invasion of Neosinocalamus affinis

通过对重庆市四面山风景区南方红豆杉林样地的调查,运用丰富度指数、Shannon-W iener多样性指数、Simpson多样性指数和Pielou均匀度指数,分析该地区竹类侵扰下的南方红豆杉群落物种多样性特征.结果表明:该群落可划分为1个群系组4个群丛,慈竹是该群落的优势种,而红豆杉为灌木层的优势种,同时也是群落的特征种;该群落在垂直结构上可分为乔木层、灌木层和草本层;其丰富度指数和多样性指数均表现为灌木层>草本层>乔木层;在均匀度上各群丛各层未表现出明显的一致性.

Based on the investigating the natural community of Taxus chinensis var.mairei,Simian Mountain,Chongqing,the results showed this community is dominated by invasion of Neosinocalamus affinis and can be divided into 1 formation groups（Neosinocalamus affinis forest）,3 associations.The community is formed of arbor,shrub and herb layers.In this plantation,3 layers demonstrate a declining trend in richness and diversity indices,shrub layerherb layerarbor layer.Neosinocalamus affinis dominates in the species of arbor layer while Taxus chinensis var.mairei in shrub layer act as the characteristic species of the community.