摘要
以东莞市中心城区城市森林为研究对象,分析东莞市城区城市森林的物种组成和群落空间结构。结果表明:城市森林中维管植物426种,隶属于104科307属;乡土植物有82种,占比较小,仅有40.59%;木本植物67科可分为10个分布区类型,180属可分为13个分布区类型,均以热带性质为主,少数为温带性质类型;植物群落重要值上,乔木层小叶榕、窿缘桉、肉桂居前三,灌木层阴香、鹅掌柴、幌伞枫居前三,草本层地毯草、细叶结缕草和酢浆草居前三;物种多度方面阴香个体数量最多;城市森林空间结构上,乔木的平均胸径为14.44cm,和其他多数城市森林研究结果一致,平均高度为8.52m,平均冠幅为3.76m,城市森林结构有向上发展的潜力;乔木胸径与树高以及冠幅呈现正相关关系,阴香和四季桂的树高和冠幅受胸径影响最大。
The study focused on the species composition and community spatial structure of urban forests in the central urban area of Dongguan City.The results showed that,in urban forests,there were 426 vascular species belonging to 104 families and 307 genera.Among them,the indigenous plants represent a relatively small proportion,with 82 species and 40.59%of all.The 67 families and 180 genera of woody plants can be divided into 10 and 13 distribution areas respectively,of which the majority were tropical and the minority were temperate.In terms of important values of plant communities,Ficus concinna,Eucalyptus exserta,and C.cassia ranked among the top three in the species of the canopy layer,C.burmanni,Heptapleurum heptaphyllum,and Heteropanax fragrans ranked among the top three in the bush layer,and so did Axonopus compressus,Zoysia pacifica,and Oxalis corniculata in the herbaceous layer.In terms of species diversity,C.burmanni had the most individuals.For the spatial structure,the average diameter at the breast height(DBH)of trees was 14.44 cm which was consistent with the results of other cities,and the average height and crown width were 8.52 m and 3.76 m,respectively,meaning the structure of urban forests contained the potential of upward development.A positive correlation was found between DBH,height,and crown width,within which the height and crown width of C.burmanni and Osmanthus fragrans were most affected by DBH.
作者
沈德才
胡桢健
黄久香
陈跃洲
Shen Decai;Hu Zhenjian;Huang Jiuxiang;Chen Yuezhou(Dongguan Institute of Forestry Sciences/National Positioning Observation and Research Station of Forest Ecosystem in Pearl River Estuary Urban Agglomeration,Dongguan Guangdong 523106;College of Forestry and Landscape Architecture,South China Agricultural University,Dongguan Guangdong 510642)
出处
《热带林业》
2024年第3期25-32,共8页
Tropical Forestry
基金
2022年东莞市社会发展科技项目(20221800906102)
广东省林业科技创新平台项目(2021-KYXM-09-02)。
关键词
东莞市
城市森林
物种组成
空间结构
Dongguan City
Urban forest
Species composition
Spatial structure
