高原鼠兔干扰对青海湖流域高山嵩草草甸植物多样性及地上生物量的影响

发布时间：2018-03-11 06:08

本文选题：高原鼠兔　切入点：群落物种组分　出处：《草业学报》2017年05期 　论文类型：期刊论文

【摘要】：采用堵洞法设置高原鼠兔干扰区和非干扰区,然后在干扰区和非干扰区内利用样方法研究了高原鼠兔干扰对青海湖流域高山嵩草草甸植物多样性和地上生物量的影响。结果表明,植物物种多样性和不同植物功能群多样性对高原鼠兔干扰的响应并不一致,其中干扰增加了杂类草功能群丰富度指数与物种丰富度指数,降低了物种均匀度指数、莎草科功能群丰富度指数和禾草科功能群均匀度指数(P0.05)。干扰区内物种均匀度指数、物种丰富度指数和杂类草功能群丰富度指数随干扰强度增加而呈增加趋势,但禾草科功能群均匀度指数却呈显著降低趋势。虽然高原鼠兔干扰显著降低了植物群落总生物量,莎草科、禾草科和豆科功能群生物量(P0.05),但显著增加了杂类草功能群生物量(P0.05)。干扰区随干扰程度增加,莎草科功能群和豆科功能群生物量逐渐降低,杂类草功能群生物量逐渐增加,而禾草科功能群生物量则先增加后降低。鉴于高山嵩草草甸植物群落物种多样性和功能多样性对高原鼠兔干扰的响应不一致,植物物种多样性和功能群多样性之间不能互相替代。
[Abstract]:The interference and non-interference areas of plateau pika were set up by plugging holes. Then the effects of plateau pika interference on the plant diversity and aboveground biomass of Kobresia alpine meadow in Qinghai Lake basin were studied by means of sample method in the interference and non-interference areas. The responses of plant species diversity and diversity of different plant functional groups to the interference of plateau pika were not consistent. The interference increased the richness index and species richness index of the functional groups of hybrid grasses, and decreased the species evenness index. The species evenness index, species richness index and hybrid functional group richness index of Cyperidaceae and Gramineae were increased with the increase of interference intensity. However, the evenness index of the functional groups of Gramineae decreased significantly, although the total biomass of the plant community was significantly decreased by the interference of the plateau pika, and that of the Cyperidaceae, and that of the Cyperidae. The biomass of functional groups of Gramineae and Leguminosae increased significantly, but the biomass of functional groups of hybrid grasses increased significantly. With the increase of disturbance degree, the biomass of functional groups of Cyperidaceae and Leguminosae decreased gradually, and the biomass of functional groups of miscellaneous grasses increased gradually. However, the biomass of functional groups of Gramineae increased at first and then decreased. In view of the different responses of species diversity and functional diversity of Kobresia alpine meadow plant community to the interference of plateau pika, There is no substitute for plant species diversity and functional diversity.
【作者单位】：兰州大学草地农业科技学院草地农业生态系统国家重点实验室;
【基金】：国家重点研发计划(2016YFC0502005) 国家行业(农业)公益项目(201203041) 国家自然科学基金(31172258)资助
【分类号】：S812

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