Species diversity of greenbelt plant in Taiyuan urban | 太原市城区绿地植物物种多样性研究

chinois. 调查太原市城区绿地植物物种的多样性，为太原市城市绿地的规划建设和植物物种多样性的保护与利用提供科学依据。采用群落生态学的调查方法，调查太原城区绿地植物的组成、构成要素及垂直结构等，运用重要值、丰富度指数、均匀度指数和Shannon-Wiener指数综合评价绿地植物的物种多样性。太原城区绿地共有维管束植物83科243属402种，主要分布在蔷薇科、菊科、豆科及杨柳科，且以引进种略多于本地种，栽培植物种类远多于野生植物种类；垂直结构以乔灌草型和乔草型居多，二者的丰富度指数、均匀度指数及Shannon-Wiener指数较高；不同功能绿地中，森林公园、附属绿地、龙潭公园和玉门河公园的植物物种多样性指数均较高。太原城区绿地植物物种多样性水平一般，需加大力度丰富和保护植物物种多样性。

anglais. To provide a scientific basis for the planning and construction of the urban greenbelts and the protection and utilization of the plant diversity in the city of Taiyuan, the species diversity of Taiyuan city’s greenbelt plants was investigated. An investigation based on community ecology was adopted which focused on the types, factors and vertical stratification of green land in Taiyuan urban area; and the plant diversity of the greenbelt was assessed comprehensively in terms of the importance value index, diversity index, evenness index and Shannon-Wiener index. The results show that on the green lands in Taiyuan urban area there are 83 families, 243 genera and 402 species of vascular plants, which are mainly Rosaceae, Asteraceae, Leguminosae sp., Salicaceae and so on; the exotic species are slightly more than the local ones and the hemerophyte species are highly more than the wild plants; the vertically distributed stratification of green land mainly includes the tree-shrubs and the shrub-herbs, of which the diversity index, evenness index and Shannon-Wiener index are all high. Besides, among green lands of different functions, Forest Garden, the Appertain green land, Longtan Garden and Yumen River Garden are of high Shannon-Wiener index and diversity index. The species diversity of greenbelt plants in Taiyuan city is just at an average level, therefore greater efforts must be put to increase and protect the plant diversity of the green lands in Taiyuan city.