不同放牧强度对荒漠草原蝗虫群落的影响

采用无底样框法对四子王旗荒漠草原不同放牧强度下的蝗虫群落进行了取样调查，比较了不同放牧强度下荒漠草原蝗虫群落的丰富度、多样性和均匀度指数及群落中蝗虫种类和数量随季节的动态变化，并对蝗虫种群分布与植物群落特征进行了相关性分析。结果表明，在不同放牧强度下蝗虫的群落结构及时间动态均存在一定差异，说明放牧活动对蝗虫群落结构有明显影响，其中，轻度放牧和重度放牧样地中蝗虫种群总数显著高于其他样地。不同种类的蝗虫群落与放牧强度之间关系表现复杂。

Effects of grazing on grasshopper communities in desert stepp

We surveyed grasshopper communities on the different grazing pastures in desert steppe by using no bottom sampling basket.The diversity, richness, uniformity and dynamic changes of grasshopper species were analysed.Moreover, the correlation of grasshopper distribution and plant communities characters was analysed.The study showed grasshopper communities character and dynamic change differed on the different grazing patures which indicated that grazing influenced the grasshopper communities.The grasshopper density was higher than othes grazed area on lightly and heavily grazed pastures.The distributon of different grasshopper species were distinctly different on the different grazing pastures