the species diversity index of the soil seed banks does not decrease with the increase of desertification degree, and it is the smallest in the semi-mobile sandlands;
土壤种子库物种多样性指数并非随着沙漠化程度的增加而下降,其中半流动沙地的物种多样性指数最小;
the species diversity index showed the similar pattern as that of the species richness:the species diversity index increased gradually with prolonging of restoration years.
物种多样性指数的变化规律与物种数的变化相一致,即随恢复时间的延长,多样性指数逐渐升高。
the results demonstrated that the species diversity index decreased gradually from the south to the north and from the west to the east.
结果表明:小型兽类物种多样性的地理分布趋势是由南向北,由西向东呈递减的趋势。