Bacterial Diversity of Freshwater Alpine Lake Puma Yumco on the Tibetan Plateau

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Abstract:

Bacterial community in the water of Lake Puma Yumco, a freshwater alpine lake on the Tibetan Plateau was studied for the first time using an integrated approach including water chemistry and culture-dependent and -independent methods. Microbial abundance in the lake water was from 1.59 × 105 to 3.37 × 105 cells mL- 1, and bacteria were evenly distributed in the lake due to its uniform water physical-chemistry. Obtained isolates were affiliated with α-, - and -Proteobacteria, Actinobacteria and Bacteroidetes, among which -Proteobacteria isolates were dominant. Retrieved bacterial 16S rRNA gene clones fell into α-, - and -Proteobacteria, Actinobacteria, Bacteroidetes, Cyanobacteria, Planctomycetes, Verrucomicrobia and Chloroflexi. Bacterial diversity in Lake Puma Yumco was higher than that in other Tibetan lakes at levels of both phyla and clusters. A half of total clones in Lake Puma Yumco were members of the widespread typical freshwater bacterial clusters. The low temperature of Lake Puma Yumco also made it possess unique freshwater bacteria members.

Keywords: Lake Puma Yumco; Tibetan Plateau; bacterial diversity

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/01490450802660201

Affiliations: 1: Institute of Tibetan Plateau Research, Chinese Academy of Sciences (CAS), Beijing, China 2: State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China 3: School of Earth Sciences, China University of Geosciences, Beijing, China,Geomicrobiology Laboratory, China University of Geosciences, Beijing, China

Publication date: March 1, 2009

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