摘要
根据 42个样地的实地调查资料 ,采用不同的物种多样性指数、丰富度和均匀度测度指标对达日县建设乡高海拔地区高寒草甸的物种多样性进行了分析 ,结果表现为 :草地物种多样性随海拔的升高总体上呈现下降的趋势 ;“黑土滩”物种多样性指数、丰富度和均匀度指数最低 ,草地生物量也最低。苔草、嵩草和灌丛草甸 ,有着较高的物种多样性指数、丰富度和均匀度指数。单子叶和灌丛植物生物量随海拔梯度的变化较为复杂 ,在一定海拔范围内有较高的生物量。
The paper analyzed the bio diversity of alpine mendow in Jiansho area of Dari County, adopting the bio diversity, abundance and evenness index of different plant species and using the data of 42 sampling site. The results show that the diversity of plant species decreases in general as the increase of altitude. The bio diversity, abundance and evenness of plant species on the 'Black Soil Type Dograded Grassland' are the lowest, as well as the biomass. Meadow dominated by Kobresia, Carex and shrubs shows a higher bio duversity, abundance and evenness. The biomass of monocotyledon and shrub communities varies, showing a high biomass only in certain range of altitude. The biomass of dicotyledon decrease as the increase of altitude.
出处
《草原与草坪》
2000年第2期32-35,共4页
Grassland and Turf
