Abstract: This paper summarized the effects of air temperature and precipitation on the sp atiotemporal variation of the vegetations on Qinghai-Tibet Plateau from the 196 0s to the early 2000s. During this period, both the air temperature and the prec ipitation in this area had a general increasing trend, but existed annu al, seasonal, and geographical variability. Under the effects of this climate ch ange, vegetations had larger spatial and temporal variations. The vegetation cov er in central and northwest parts of the Plateau tended to decrease, while that in southeast part tended to improve. In the meanwhile, the timing of green- and yellow-turning of the vegetations as well as their species composition and com munity structure in some areas varied, and the vertical and horizontal vegetatio n belts moved. Net primary production showed a general increasing trend, while t he biomass in some areas was decreasing and the eco-environment was deteriorati ng, mainly due to freeze-thaw erosion and desertification. The future long term researches at both micro and macro levels to further confirm the effects of cli mate change on the vegetations were recommended.

Key words: Acanthopanax senticosus, Hyperin, Habitat, HPLC