三峡库区灌丛群落多样性的研究

通过对三峡库区灌丛群落的初步调查，该地区灌丛现有１５个群落类型，常见的球核荚灌丛，白栎灌丛，黄栌灌丛，其丰富度指数、多样性指数相对较高，而疏水柏枝灌丛、秋华柳灌丛物种相对单一，灌丛群落多样性在海拔梯度上未表现出明显的规律性，这可能与库区强烈的人为干扰活动有关。

The Study of Shrub Community Diversity in the Three Gorges Reservoir Area in China

According to the data of shrubs from 68 plots,there are 15 community types in the Three Gorges Reservoir area.As for the common shrubs,such as: Viburnum propinquum community, Cotinus coggygria community, Quercus fabri community,the richness index is relatively high both in shrub layer and in herb layer,the richness index in Myricaria laxiflora community, Distylium chinense community, Salix variegata community and S.variegata M.laxiflora community is relatively low.The diversity index in V.propinquum community is relatively high both in shrub layer and in herb layer,but it is relatively low in Q.serrata var .brevipetiolata community, Coriaria nepalensis community and Vitex negundo community.The regularity of trend of community diversity along elvation has not been found,maybe human disturbance is one of the main reasons.