鼢鼠土丘植被恢复演替过程中的物种多样性变化及演替趋同效应

Plateau zokor is one of the major rodents in subalpine meadow, They frequently consume plant roots and entire plants, largely destructing the grassland. Meanwhile, they excavate burrow systems and deposit the soil aboveground, then creating new sites that can initiate succession at a local scale. We investigated the community structure on the zokor mound, the results indicate that: (1) there is a continuous increase in species richness with succession. (2) Shanon-Weiner index also show species diversity may peak at the late stage, even higher than the matrix meadow. (3) using the community heterogeneity index to measure different mound communities, it suggested that the variation is greater in early secondary succession , and the variation will decrease over time. It is a good evidence to prove that the succession of mound is a process from divergence to convergence.