Analysis on Plant Diversity in Different Degraded Stages of Seriphidium transillense Desert Grassland

The results of plant diversity analysis in different degraded stages of Seriphidium transillense desert grassland show that media-degradation maintains high diversity,changes as follows: media-degradationheavy degradationover-degradationnon-degradation.The related analysis of the richness,evenness and diversity of the community species indicated that evenness makes greater contribution to species diversity than the species richness.The result of the β diversity analysis manifests that species replacement become slowly in neighbor degraded stages along with the increase of degradation.