【Abstract】 The environmental changes of the Qinghai-Tibet Plateau possess sensitive response to global changes. However, there is still a lack intensive study about the relationship between microorganisms and environment changes. In the present study, researches have been conducted in the Muztagh Ata Glacier, Muji Glacier and Yala Glacier to investigate snow bacteria and their relationships with local climatic environmental conditions. The results demonstrated that bacterial community of the Muztagh Ata Glacier and Muji Glacier in westerly area were dominated by Bacteroidetes and Betaproteobacteria; Cyanobacteria and Betaproteobacteria were the dominant groups in the Yala Glacier, which is affected by the Indian monsoon. It is also found that bacteria of the three glaciers have shared high 16 S rRNA, similar to that from ocean, lakes, soil, plant, desert and other cold environment. These results also indicated that glaciers in westerly and Indian monsoon areas have different bacterial clades. Furthermore, it was found that bacterial diversity was affected by the climatic zone. Shannon′s diversity index was higher in Muji Glacier and Muztagh Ata Glacier than that in Yala glacier. Besides, Yala Glacier bacterial community varied significantly with season, while that in Muztagh Ata Glacier was not so significant.更多还原