南宁市相思湖公园人工植物群落结构及其多样性特征

Community Structure and Diversity of Artificial Plants of Xiangsi Lake Park of Nanning

基于植物群落α-多样性测度法和典型样地法,以南宁市相思湖公园绿地为研究对象,在公园选取98个20 m×20m或40m×10m的群落样地,对植物群落结构及其多样性特征进行研究,为南宁市城市公园绿地树种结构优化、生物多样性保护等提供参考依据。结果表明:相思湖公园人工植物群落物种丰富,共有维管束植物58科111属140种;本地木本植物指数0.5;常绿树种与落叶树种之比为8∶2;桑科(Moraceae)、禾本科(Gramineae)、苏木科(Caesalpiniaceae)和棕榈科(Arecaceae)等4科为植物群落优势科;公园绿地植物群落以乔-灌-草为主要群落结构类型;洋紫荆(Bauhinia variegata)、叶子花(Bougainvillea spectabilis)和沿阶草(Ophiopogon bodinieri)为所在层次优势种;公园绿地植物群落α-多样性指数整体特征为乔木层>灌木层>草本层。

Based on theα-diversity measurement method of plant community and the typical sample plot method,the green space of Xiangsi Lake Park in Nanning was taken as the research object,98 community sample plots of 20m×20m or 40m×10m were selected in the park.The research on the characteristics of tree species in urban parks and green spaces in Nanning will provide a reference for tree species structure optimization and biodiversity protection.The results showed that the artificial plant community in Acacia Lake Park was rich in species,with a total of 140 species of vascular plants in 58 families,111genera;the native woody plant index was 0.5;the ratio of evergreen tree species to deciduous tree species was 8:2;Four families,Moraceae,Gramineae,Caesalpiniaceae,and Arecaceae,are the dominant families of plant communities;the plant community in the park-green space is dominated by tree-shrub-grass;Bauhinia variegata,Bougainvillea spectabilis,and Ophiopogon bodinieri were the dominant species at the level;the overall character of theα-diversity index of the plant community in the park green space was tree layershrub layerherbaceous layer.