【摘要】 为探讨我国北方草原区露天煤炭开采对周边草原群落的影响,本研究以锡林浩特市蒙东能源控股有限责任公司西二露天矿作为研究区,对其周边草原群落组成及物种多样性、相似性及覆盖度进行调查和分析,得出以下结论:(1)西二矿研究区内共出现11个科、28个属、45种植物,多为一年生或多年生的草本植物。该区域群落建群种为糙隐子草,属于典型的退化草原。(2)群落物种多样性距离梯度的影响研究结果显示,草原群落稳定性差,处于退化状态;群落物种多样性和相似性没有显示出由近及远的规律变化;距离梯度上生物量和盖度也没有显示出由近及远逐渐增加的规律性变化,说明露天煤炭开采对周边草原无明显影响。更多还原

【Abstract】 In order to explore the effect of open-pit coal mining on the surrounding grassland communities in the northern grassland of China, this study choose the grassland in the south of the West Second Open-Pit Mine of Mengdong Energy Holding Limited Company in Xilin Hot as the study area, the community composition, species diversity, community similarity and coverage of the surrounding grassland were investigated and analyzed, and the following conclusions were obtained:(1) There are 45 species found in the study area belonging to 28 genera, 11 families, most of the plants are annual or perennial herbs. Cleistogenes squarrosa is the construction species of the community, means it is a typical degraded grassland.(2) The study of gradient distance showed that: the grassland communities in all spots are in a state of degradation, and the diversity and similarity of the community species do not show a regular change from near to far; biomass and coverage on the gradient distance also do not show regular changes from near to far. The result showed that open-pit coal mining has no obvious influence on the surrounding grassland.更多还原