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Deterministic Processes Shape Abundant and Rare Bacterial Communities in Drinking Water.
Binghua Han1, Qiaoling Yu1, Wanghong Su1
1School of Public Health, Institute of Occupational and Environmental Health, Lanzhou University, Lanzhou, 730000, China.
Current Microbiology
|February 22, 2023
Summary
Seasonal changes in drinking water reveal distinct bacterial communities. While rare bacteria exhibit similar assembly patterns to abundant ones, their ecological roles and responses to environmental factors differ significantly.
Area of Science:
- Microbiology
- Environmental Science
- Ecology
Background:
- Understanding bacterial community assembly in drinking water is vital.
- Limited knowledge exists on seasonal variations and the assembly of abundant versus rare bacteria.
Purpose of the Study:
- To investigate the composition, assembly, and co-occurrence patterns of abundant and rare bacteria in drinking water across seasons.
- To explore the influence of environmental variables on these bacterial communities.
Main Methods:
- High-throughput 16S rRNA gene sequencing was employed.
- Environmental variables and bacterial communities were analyzed from five drinking water sites over four seasons.
- Co-occurrence network analysis was performed.
Main Results:
- Abundant taxa included Rhizobiales_UG1, Sphingomonadales_UG1, and Comamonadaceae; rare taxa comprised Sphingomonadales_UG1, Rhizobiales_UG2, and Rhizobiales_UG1.
- Rare bacteria showed higher richness than abundant ones, with no significant seasonal differences in richness.
- Beta diversity differed significantly between abundant and rare communities and across seasons.
- Deterministic mechanisms and water temperature had a greater impact on abundant bacterial taxa.
Conclusions:
- Rare bacteria share analogous assembly patterns with abundant bacteria in response to environmental variables.
- Despite similar assembly, ecological diversities, driving forces, and co-occurrence patterns of rare and abundant bacteria are not equivalent in drinking water ecosystems.
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