北京综合性公园植物群落的数量分类及物种多样性研究

采用法瑞学派典型样方法,对北京综合性公园绿地植物群落进行取样调查。（1）利用双向指示种分析法（TWINSPAN）,将52个样地进行数量分类,并根据不同指示种将其命名为9种群落模式;（2）利用Shannon-Wiener多样性指数,比较9种群落模式不同片层的物种多样性。结果表明：以草地早熟禾为草本层优势种的群落模式,其草本层物种多样性低于其他模式,表明草地早熟禾的应用在一定程度上限制草本层的物种多样性;乔木层和灌木层多样性水平接近,以观赏为主的群落模式,其多样性较高,以隔离防护为主要功能的群落模式多样性最低,反应群落的景观功能对群落物种多样性水平有一定影响。

Study on Numerical Classification and Species Diversity of Plant Communities in Synthesis Parks of Beijing

Typical sampling method was adopted to sample plant communities in s of Beijing.(1).52 samples were surveyed and classified into 9 configuration models using TWINSPAN;(2).Shannon-Wiener index was used to analyze species diversity of these 9 models.The result shows that: in the herb layer,communities which take Poa pratensis as dominant species has lower diversity than others,indicating that Poa pratensis reduced species diversity in herb layer;the diversity index in tree layer is close to shrub layer,and those communities mainly acting in ornamentation have higher diversity,those mainly displaying preventive function have lower diversity,indicating that the landscape function of communities has some influences on the species diversity.