Abundance and community of snow bacteria from three glaciers in the Tibetan Plateau  

作　　者：Shuhong Zhang Guangli Yang Yetang Wang Shugui Hou 

机构地区：[1]Department of Life Science, Shangqiu Normal University, Shangqiu 476000, China [2]School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210093, China [3]Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China [4]Shandong Marine Fisheries Research Institute, Yantai 264006, China

出　　处：《Journal of Environmental Sciences》2010年第9期1418-1424,共7页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 40825017,40576001);the State Key Laboratory of Cryosphere Science,Cold and Arid Regions Environmental and Engineering ResearchInstitute,Chinese Academy of Sciences (No. SKLCS-ZZ-2008-06)

摘　　要：Bacterial abundance and diversity in snow of East Rongbuk, Laohugou and Halluogou glaciers on the Tibetan Plateau were investigated through epifluorescence microscope and denaturing gradient gel electrophoresis. Cell abundance ranged from 4.0 × 10^3 to 290.2 × 10^3 cells/mL. The phylogenetic trees placed the 16S rRNA sequences in four major groups： Proteobacteria, Firmicutes, Actinobacteria and Bacteroidetes. Brevundimonas, Flavobacterium, Hymenobacter, Bacillus, Polaromonas, Rhodoferax and Streptomyces were widely distributed bacteria in glaciers from different cold regions. The remaining five genera of Hylemonella, Delftia, Zoogloea, Blastococcus and Rhodococcus were endemism, only recovered from our investigated glaciers. It is proposed that the three glaciers on the Tibetan Plateau provide a specific ecological niche for prolonging survival of diverse microbial lineages.Bacterial abundance and diversity in snow of East Rongbuk, Laohugou and Halluogou glaciers on the Tibetan Plateau were investigated through epifluorescence microscope and denaturing gradient gel electrophoresis. Cell abundance ranged from 4.0 × 10^3 to 290.2 × 10^3 cells/mL. The phylogenetic trees placed the 16S rRNA sequences in four major groups： Proteobacteria, Firmicutes, Actinobacteria and Bacteroidetes. Brevundimonas, Flavobacterium, Hymenobacter, Bacillus, Polaromonas, Rhodoferax and Streptomyces were widely distributed bacteria in glaciers from different cold regions. The remaining five genera of Hylemonella, Delftia, Zoogloea, Blastococcus and Rhodococcus were endemism, only recovered from our investigated glaciers. It is proposed that the three glaciers on the Tibetan Plateau provide a specific ecological niche for prolonging survival of diverse microbial lineages.

关 键 词：bacterial diversity glacial snow the Tibetan Plateau 

分 类 号：Q939.1[生物学—微生物学] P343.6[天文地球—水文科学]