Bacterial diversity differences and influence factors of four types of hydrochemical characteristic lakes in the Qinghai-Tibet Plateau

Shen, Guoping; Han, Rui; Miao, Zengqiang; Xing, Jiangwa; Li, Yongzhen; Wang, Rong; Zhu, Derui

doi:10.17520/biods.2021420

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“…In this study, the dominant archaeal phylum in both DT and XT was Euryarchaeota. It is known that higher salinity may have facilitated Euryarchaeota survival and growth (58), although this may result in low diversity (59). Microorganisms living in hypersaline lakes must endure salinity stress (60), and therefore, only a few microorganisms can survive in such an extremely harsh environment.…”

Section: Discussionmentioning

confidence: 99%

Prokaryotic microbial diversity analysis and metabolic function prediction of salt lakes on the Qinghai-Tibet Plateau

Zhang

Zhu

et al. 2023

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The Dong Taijinar Salt Lake (DT) and Xi Taijinar Salt Lake (XT) have been widely studied as mineral-rich areas. However, little is known about the composition and distribution of the microbial communities in these two lakes. In this study, metagenomics sequencing was used to analyze the diversity and potential functions of the microbial communities in DT and XT. According to our report, the salinity of DT (332.18–358.30 g/L) was 10 times higher than that of XT (20.09–36.83 g/L). Interestingly, the dominant domain in DT wasArchaea(96.16%), while that in XT wasBacteria(93.09%). The distribution ofBacteriain the DT revealed 33 phyla and 1717 genera. The dominant genus in DT was Marinobacillus, which was positively correlated with total phosphorus content. There were four main phyla and 153 genera identified in theArchaeaof DT. The most abundantArchaeagenera in DT were Natronomonas (24.61%) and Halorubrum (23.69%), which were mainly positively correlated with the Na+, Ca2+, and Cl−contents. Similarly, there were 33 phyla and 1906 genera ofBacteriain XT, and Loktanella was the dominant genus. The archaeal taxonomy in XT mainly included four phyla and 149 genera. Proteobacteria and Euryarchaeota were the most abundant bacterial and archaeal phyla in the two salt lakes. Analysis of the halophilic mechanisms of the microorganisms identified in these two salt lakes revealed that the Bacteria in XT preferred to synthesize compatible solutes, whereas the Archaea in DT preferred a "salt-in" adaptation strategy in salt-stressed environments.

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Section: Discussionmentioning

confidence: 99%