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Nutrients Changed the Assembly Processes of Profuse and Rare Microbial Communities in Coals
Yuanyuan Zhang1, Sheng Xue1,2, Xiaohua Chang3
1School of Safety Science and Engineering, Anhui University of Science and Technology, Huainan, China.
Polish Journal of Microbiology
|October 3, 2022
Summary
Nutrient stimulation enhances coal microbial diversity and methane production potential. It alters microbial community composition, favoring specific phyla and increasing the influence of dispersal and selection processes.
Area of Science:
- Microbial Ecology
- Biogeochemistry
- Bioresource Engineering
Background:
- Nutrient stimulation is key for boosting biogenic coalbed methane production.
- Understanding microbial community dynamics in coal under nutrient enrichment remains limited.
Purpose of the Study:
- To analyze the impact of nutrient stimulation on microbial community assembly in coal.
- To investigate changes in profuse and rare microbial taxa and their ecological drivers.
Main Methods:
- Meta-analysis of 16S rRNA gene data from 59 coal microbial communities.
- Analysis of microbial richness (Chao1), community composition (NMDS, Bray-Curtis), and co-occurrence networks.
- Assessment of ecological processes (stochasticity, dispersal limitation, variable selection).
Main Results:
- Nutrient stimulation increased microbial richness for both profuse and rare taxa.
- Community composition shifted, with reductions in Proteobacteria/Acidobacteria and increases in Euryarchaeota/Firmicutes.
- Nutrient addition altered microbial co-occurrence networks, highlighting rare taxa as key players.
- Stochastic processes dominated community assembly, with nutrient stimulation enhancing dispersal limitation and variable selection for rare taxa.
Conclusions:
- Nutrient stimulation significantly impacts coal microbial diversity and community structure.
- Findings provide mechanistic insights into microbial responses to nutrient enrichment in coal ecosystems.
- This knowledge is crucial for optimizing microbial ecology and sustainable methane production in coals.
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