城市绿地植物物种多样性评价体系的构建

Study on the Plant Species Diversity Evaluation System in Urban Green Space

城市生物多样性评价越来越受到国际社会重视,但现有评价指标和体系都是针对自然生态系统的,缺乏城市绿地生物多样性评价的指标和体系。文章针对城市植物物种多样性特点,首次引入物种饱和度指数、品种丰富度指数等指标,细化物种丰富度指数、物种相对丰度指数等指标,拟通过指标权重研究,以基于6个一级指标和若干二级指标的植物物种多样性指数(PSDI)为标准进行城市绿地生物多样性评价,为城市生物多样性规划提供理论指导。

In recent years,more and more attention has been paid to urban biodiversity evaluation,but the existing evaluation indicators and systems are all directed to natural ecosystem,and no ones for urban green space. In this paper,the urban plant species diversity index（PSDI）,comprised of six first grade indicators and some second grade indicators,is adopted to evaluate plant diversity in urban green space. Considering the characteristics of the urban plant species diversity,two new indexes,the species saturation index and the cultivar richness index,are introduced firstly,and some other indexes such as species richness index and the species relative abundance index are detailed. The study can provide theory basis for urban biodiversity planning.