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Stochasticity versus determinism: Microbial community assembly patterns under specific conditions in petrochemical activated sludge.
J. Hazard. Mater. 407:124372 (2021)
The pattern of microbial community assembly in petrochemical sludge is not well-explained. In this study, three kinds of petrochemical activated sludge (AS) from the same seed sludge were investigated to determine their microbial assembly pattern for long-term adaptation. Beta Nearest Taxon Index analysis revealed that the assembly strategies of the abundant and rare operational taxonomic unit (OTU) sub-communities are different for archaeal and bacterial communities. Abundant OTUs preferred deterministic processes, whereas rare OTUs randomly formed due to weak selection. Canonical correspondence analysis/variation partition analysis and Mantel testing results revealed that ammonium, petroleum, and chromium (Cr (VI)) mainly structured the abundant sub-communities. On the other hand, environmental variables, including ammonium, petroleum, and heavy metals, shaped the rare sub-communities. The PICRUSt2 tool was used to predict the functions. Results indicated a greater abundance of microbes harboring the hydrocarbon degradation pathway and heavy-metal-resistant enzymes. Cross-treatment experiments using one type of AS to treat the other two kinds of wastewater were conducted. The results of the cross-treatment experiments and qPCR both suggest the functional adaptation of the microbial community. We revealed selection strategies for the adaptation of bacteria and archaea in AS during environmental changes, providing a theoretical basis for petrochemical wastewater treatment.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Abundant Sub-community ; Assembly Pattern ; Determinism ; Rare Sub-community ; Stochasticity; Waste-water Treatment; Bacterial Diversity; Long-term; Removal; Dispersal; Dynamics
ISSN (print) / ISBN
0304-3894
e-ISSN
1873-3336
Journal
Journal of Hazardous Materials
Quellenangaben
Volume: 407,
Article Number: 124372
Publisher
Elsevier
Publishing Place
Radarweg 29, 1043 Nx Amsterdam, Netherlands
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
Institute of Virology (VIRO)
Grants
Chinese Scholarship Council
Gansu Province Major Science and Technology project
National Natural Science Foundation of China
Gansu Province Major Science and Technology project
National Natural Science Foundation of China