南京老山国家森林公园朴树群落特征研究

The characteristics of Celtis sinensis community in Laoshan National Forest Park of Nanjing

据调查,南京老山地区4 000 m2样地的朴树群落有维管植物61科131属167种。科级地理成分的热带性质较强,属级地理成分以温带性质为主,反映出其森林植被有从亚热带向暖温带过渡的特点。朴树群落分为乔木层、灌木层和草本层。Shannon-Wiener多样性指数和Simpson指数均为草本层>灌木层>层间植物>乔木层,Pielou均匀度指数为层间植物>草本层>乔木层>灌木层,这反映出朴树群落的次生性质明显。

There were 61 families,123 genera and 149 vascular species based on field investigation in ten plots of 400 m2 of Celtis sinensis community in Laoshan National Forest Park of Nanjing.The analysis of species diversity showed that herb layer was of the highest species diversity by Shannon-Wiener diversity index and Simpson index,and tree layer was of the lowest.When it came to Pielou evenness index,the inter-stratum plants was of the highest value,and the shrub layer was of the lowest.Therefore,this community showed obvious secondary characteristics.