渝西学院后山山林植被物种多样性研究

本选取渝西学院校园后山(黄瓜山)山林植被中6种主要森林类型的19个样方，通过比较这些类型的物种丰富度和Shannon指数，揭示了这些类型物种多样性的差异．结果显示：1)各森林类型乔木层、草本层物种丰富度低，灌木层物种丰富度较高；2)各森林类型的Shannon指数同物种丰富度具有不同的表现规律；3)常绿针阔混交林与落叶阔叶林具有特殊的物种多样性垂直结构特征；4)物种恒有度分析表明，星湖校区山林植被为人工林，景观简单，连续性强，存在明显的环境梯度．

On Species Diversities of the Mountain Forest Vegetation in the Back Moutain Located in Western Chongqing University

The species diversities was studied on the mountain forest vegetation in Cucumber Mountain Xinghu campus . A total of 19 plots with 6 main forest types were chosen in this study. By comparing species richness and Shannon index of the forest types, and species constant-rate, the differences among these types was disclosed. The results show that,1) Species richness of tree layers and layers were low, whereas it was higher in shrub layers in all these forest types.2) Shannon index of the forest types had dissimilar regularity with that of species richness.3) Evergreen mixed forest conifer with broadleaf trees and deciduous broadleaf forest had special vertical structure of species diversity. 4) Species constant-rate analysis showed that the mountain forest vegetation in Cucumber Mountain Xinghu campus is artificial forest. The landscape is sample and it has continuity. There is obvious environmental gradient in this region.