天山北坡中段草地植物资源构成及垂直分布

Composition and vertical distribution of plant resources at the middle section on the northern slope of Tianshan Mountains.

通过野外考察数据和现有文献资料,分析了天山北坡地区草地植物物种资源的组成特征。结果表明,复杂的生态地理环境条件造就了天山北坡中段草地植物种类非常丰富;在山地草地垂直分布带上,山地草甸的物种丰富度最大;β多样性指数可以直观地反映垂直带间物种组成的差异性或不同地段的生境多样性;垂直带间的植物物种资源的特征是生境特征和环境演变对该地区植物分布共同作用的结果。在垂直方向上对天山北坡中段草地植物的空间变化进行分析,揭示了植物物种资源在北坡的垂直变化规律,为该地区的生物多样性资源保护提供科学依据。

Based on field investigation and relative data,the composition of grassland plant resources at the middle section on the northern slope of Tianshan Mountain was analyzed.The results showed that the complicated ecological and geographical conditions resulted in abundan plant resources in this area,and the maximum of the species richness appeared in the alpine meadow.The heterogeneity of species along the vertical zone and the diversity of habitats at different parts could be reflected obviously by β index.The vertical differentiation of grassland species resulted from the habitat and environment evolvement.The conclusion could provide a scientific foundation to the conservation of biodiversity in this region.