Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 805, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2021.150294
Keywords
Gene sequencing; Freshwater lake; Alpha diversity; Environmental factors; Seasonal variation; Alpine lake ecosystem
Categories
Funding
- National Natural Science Foundation of China [31872242, 32070405, 32001228, 32000291, 31900311]
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This study explored the microbial community and its influencing factors in Hulun Lake water during different seasons using high-throughput sequencing. The results showed significant seasonal differences in the distribution of important phyla and alpha diversity of microorganisms. Changes in environmental variables were correlated with changes in the microbial community, with temperature, pH, and dissolved oxygen potentially major factors influencing seasonal bacterial diversity trends.
Microbial communities play an important role in water quality regulation and biogeochemical cycling in freshwater ecosystems. However, there is a lack of research on the seasonal variation in lake water microorganisms in cold environments. In this study, 16S rRNA gene high-throughput sequencing was used to explore the microbial community and its influencing factors in Hulun Lake water during different seasons. The results showed that Proteobacteria, Actinobacteria, and Bacteroidetes were the most important phyla in the microbial community of Hulun Lake, but they had significant seasonal differences in their distribution. In addition, significant seasonal differences were observed in the alpha diversity of microorganisms, with bacterial diversity being higher in winter than in summer. Changes in environmental variables were significantly correlated with changes in the microbial community, and the rapid changes in temperature, pH, and dissolved oxygen are potentially the major factors influencing seasonal bacterial diversity trends. The findings of the present study enhance our understanding of the microbial communities in alpine lake ecosystems and are of great significance for the management and protection of lake ecosystems. (c) 2021 Published by Elsevier B.V.
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