玉溪城市绿地园林树木多样性调查研究

Study on the Diversity of Tree Species in Gardening Plant Communities in Yuxi City

按绿地类型和干扰类型,分别调查玉溪城市园林植物群落,对比分析各类型绿地植物群落树木的优势度指数、Simpson指数、Shannon指数等指标。结果表明:(1)自然森林乔木层的优势度较大,乔木层优势种的集中程度高;(2)自然型绿地群落乔木种类的多样性低于人工型绿地植物群落;(3)城市中不同类型绿地植物群落总体的物种多样性依次为公园绿地﹥校园绿地﹥广场绿地。

The weighted average tree species abundance,Simpson index,Shannon index and dominance index were analyzed for natural forest communities,half-natural forest communities and some types of gardening plant communities dominated by trees.The results indicated that the dominance index of the arbor layer was great in the natural forest,the number of dominant of the arbor layer was lower than that in the artificial forest,and the species diversity of the communities in park green spaces was the richest of the three types in the city.