摘要
为进一步挖掘城市树木的生态潜力,提高城市环境下树种的多样性,促进城市树木的可持续发展,文章根据城市显著树评价标准,在对合肥市一环主城区、瑶海区和政务区内分布的显著树进行实地认定的基础上,就合肥城市显著树的树种结构、多样性和空间分布规律作进一步的分析。结果表明:1)3区共认定显著树528株,隶属27科36属40种,其中,定性指标评定23株,定量指标评定505株;数量分布上,瑶海区>一环主城区>政务区;树种相对丰度排名前4依次为二球悬铃木、香樟、银杏和雪松。2)显著树树龄结构上以20~40年居多,百年以上仅22株;常绿与落叶树种种类比为1∶3,株数比为149∶379;乡土树种共23种,占比57.50%。3)区域分布上,瑶海区显著树平均树高与冠幅面积最大,一环主城区平均胸径、Shannon-Wiener指数和Simpson指数最高,政务区物种均匀度指数最高。4)不同立地类型中,城市道路、居住用地和公园的显著树分布最多,机关团体、学校、公共设施用地、风景名胜和宗教用地显著树数量占比仅11.74%。
In order to further tap the ecological potential of urban trees,improve the diversity of tree species in urban environment,and promote the sustainable development of urban trees,this paper further analyzes the structure,diversity and spatial distribution law of the prominent tree species in Hefei city on the basis of on-the-spot identification of the prominent trees distributed in the main city,Yaohai district and government district of Hefei City according to the evaluation criteria of urban prominent tree species.The results show that:1)528 significant trees are identified in the three districts,belonging to 40 species,36 genera and 27 families,with 23 trees evaluated by qualitative index and 505 trees by quantitative index.In quantity distribution,the number of significant trees in the three districts is ranked as Yaohai District>First Ring Road City>Government Affairs District.The top four tree species in relative abundance are Platanus acerifolia,Cinnamomum camphora,Ginkgo biloba and Cedar.2)In terms of the tree age structure,most trees are 20〜40 year old,and only 22 trees are over 100 years old;The ratio of evergreen to deciduous tree species is 1:3,and the ratio of plant to tree is about 7:18;There are 23 native tree species accounting for 57.50%,but only 171 trees.3)In terms of area distribution,the average tree height and crown area in Yaohai District are the largest,the average DBH,Shannon-Wiener index and Simpson index in the first-ring city area are the highest,and the species evenness index in Government District is the highest.4)In terms of site types,most significant trees are distributed in urban streets,residential areas and parks,and only 11.74%of them are distributed in government organizations,schools,public facilities,scenic spots and religious land.
作者
王嘉楠
童伶俐
张恒
Wang Jianan;Tong Lingli;Zhang Heng(College of Forestry and Landscape Architecture,Anhui Agricultural University,Hefei 230036,China;Anhui Construction Engineering Technician College,Hefei 230036,China)
出处
《中国城市林业》
2021年第4期6-11,共6页
Journal of Chinese Urban Forestry
基金
中央财政林业科技项目“毛竹笋材两用林生态高效经营利用研究及示范推广”(皖[2018]TG02号)
安徽省林业科技创新研究项目“城市森林质量精准提升关键技术研究”(AHLYCX-2019-01)。
关键词
城市森林
显著树
树种多样性
空间分布
合肥市
urban forest
significant tree
tree species diversity
spatial distribution
Hefei City
