青藏高原盐湖细菌群落与超盐环境因素的相关性

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Abstract The bacterial structure and diversity of extremely salty lakes on the Qinghai-Tibet Plateau were investigated using high-throughput sequencing approach based on 16S rRNA gene (V3~V4region), and then the difference of community compositions and the restrict correlation of hypersaline environmental factors were investigated. Results showed that the bacterial communities of hypersaline samples were relatively stable and evolutionally convergent, and the complexity and the diversity index were significantly lower than the usual salt environment. The dominant bacterial phyla were affiliated to Firmicutes (74.04% to 81.04% of relative abundance proportion), followed by Proteobacteria (15.51% to 20.06%), Bacteroidetes (2.68% to 4.84%) and Actinobacteria (0.71% to 2.45%). Base on the comparative analysis of other types of hypersaline lakes, the characteristic genera in this study were Bacillus (50.63% to 58.35%), Lactococcus (9.28% to 11.81%) and Oceanobacillus (8.41% to 10.52%). Canonical correspondence analysis showed that the dominant bacterial genera (including Bacillus, Lactococcus, Pseudomonas, Oceanobacillus, Stenotrophomonas, Psychrobacter, Myroides, Brochothrix and Arthrobacter) and the hypersaline samples cluster was positively correlated with the saline environment factors including total salinity, Cl^-, K⁺, Mg²⁺, and CO₃^2-.

Key words： Qinghai-Tibet Plateau salt lake halophilic bacteria hypersaline environment environmental factors

Received: 23 May 2017

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	Articles by authors
	ZHU De-rui
	HAN Rui
	SHI Qing
	SHEN Guo-ping
	LONG Qi-fu
	SHUANG Jie

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ZHU De-rui,HAN Rui,SHI Qing等. Correlation analysis of bacterial community and hypersaline environmental factors in extreme salt lakes on the Qinghai-Tibet Plateau[J]. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(12): 4657-4666.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2017/V37/I12/4657

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