Effects of rodents activities on grazing land and ecosystem in alpine meadow

Plateau pika (Ochotona curzoniae) and plateall zokor (Myospalax baileyi) are the important members of the ecosystem and have significant effects on energy cycles in alpine meadow. The present paper analysis the benefits and harms of these two rodents on pasture grassland, plant community and soil and their response to these variations on grasslands which will improve the understanding on rodents. The key issue of conversion of rodents activities from harms to benefits is to determine the population density associated with disaster and the number and grazing method of livestock in alpine meadow ecosystem.