The Effects of Salinity and pH on Microbial Community Diversity and Distribution Pattern in the Brines of Soda Lakes in Badain Jaran Desert, China

A groundbreaking study reveals that microbial communities in the soda lakes of Badain Jaran Desert, China, are shaped primarily by pH and salinity. While bacteria dominate low to moderately saline lakes, archaea thrive in hypersaline conditions, indicating a strong correlation between environmental factors and microbial diversity. The research, employing high-throughput sequencing of 16S rRNA genes across five lakes with varying salinity (2.1–397.33 g/L) and pH (9.69–10.83), identified distinct microbial distributions: Burkholderia and Halomonas in low-salinity lakes, Spiribacter and Halomonas in moderately saline lakes, and Halohasta and Halosimplex in hypersaline lakes. Notably, some haloalkaliphiles, like Spiribacter and Halomonas, survived beyond their typical pH and salinity limits, suggesting the presence of undiscovered species. This study underscores the resilience and adaptability of microbial life in extreme environments.

Banda, J. F., Lu, Y., Hao, C., Pei, L., Du, Z., Zhang, Y., Wei, P., & Dong, H. (2019). The Effects of Salinity and pH on Microbial Community Diversity and Distribution Pattern in the Brines of Soda Lakes in Badain Jaran Desert, China. Geomicrobiology Journal, 37(1), 1–12. https://doi.org/10.1080/01490451.2019.1654568