Plant community characteristics of trampling disturbanceKobresia humilis community along the road in Naqu, Tibet

Abstract

The change of plant community character during recovery succession processes of high mountain meadow in Naqu, Tibet, was investigated. The results show that there are 41 plant species in the inventoried quadrates. The high-plants in four big families plays important roles in natural vegetation recovery, whileKobresia play an important role in climax communities. The plant species components changed with each succession stage. The plant species were mainly annual and biennial during the early succession stage, and perennial during the medium; and dominated byKobresia humilis during the late.Potentilla bi furca andPotentilla tanaletfolia were both found in all stages. The accumulated number of family, genus, and species during the succession process varied quadric with the stages. The main plant community characteristics varied logistically with the succession stages except the height. The community characteristics mainly affected by dominant species which were changed in same rhythm. The biomass under ground was far more than the upground. The plant diversity inflated in the medium stage.