Seasonal dynamics of the microbial community in two full-scale wastewater treatment plants: Diversity, composition, phylogenetic group based assembly and co-occurrence pattern

Sun, Chenxiang; Zhang, Bing; Ning, Daliang; Zhang, Ya; Dai, Tianjiao; Wu, Linwei; Li, Tianle; Liu, Wei; Zhou, Jizhong; Wen, Xianghua

doi:10.1016/j.watres.2021.117295

Cited by 126 publications

(44 citation statements)

References 43 publications

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“…2a , Supplementary Fig. 4a, c ), in agreement with the findings of Sun et al 15 studying networks’ topology in fully functional WWTPs. On the contrary, in the SU-WWTP a steady increase in modularity and co-exclusion proportion was accompanied with a decrease in clustering coefficient (Fig.…”

supporting

confidence: 91%

Niche differentiation drives microbial community assembly and succession in full-scale activated sludge bioreactors

Celis

Duque

Marquina

et al. 2022

npj Biofilms Microbiomes

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Network models and community phylogenetic analyses are applied to assess the composition, structure, and ecological assembly mechanisms of microbial communities. Here we combine both approaches to investigate the temporal dynamics of network properties in individual samples of two activated sludge systems at different adaptation stages. At initial assembly stages, we observed microbial communities adapting to activated sludge, with an increase in network modularity and co-exclusion proportion, and a decrease in network clustering, here interpreted as a consequence of niche specialization. The selective pressure of deterministic factors at wastewater treatment plants produces this trend and maintains the structure of highly functional and specialized communities responding to seasonal environmental changes.

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supporting

confidence: 91%

Niche differentiation drives microbial community assembly and succession in full-scale activated sludge bioreactors

Celis

Duque

Marquina

et al. 2022

npj Biofilms Microbiomes

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“…This indicates that these taxa may have similar trophic preferences or similar ecophysiological responses to different environmental conditions in the sediments (Zhang et al ., 2021). Previous studies indicated that keystone taxa possess disproportionately more important roles in maintaining network structure than other microorganisms in a network, and the disappearance of these putative keystone taxa may cause networks to disassemble (Jordan, 2009; Faust and Raes, 2012; Sun et al ., 2021). As shown in Fig.…”

Section: Discussionmentioning

confidence: 99%

Distinct strategies of the habitat generalists and specialists in sediment of Tibetan lakes

Liu

et al. 2022

Environmental Microbiology

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Microbial metacommunities normally comprise generalists and specialists. Uncovering the mechanisms underlying the diversity patterns of these two subcommunities is crucial for aquatic biodiversity maintenance. However, little is known about the ecological assembly processes and co-occurrence patterns of the habitat generalists and specialists across large spatial scales in plateau lake sediments, particularly regarding their environmental adaptations. Here, we investigated assembly processes of the habitat generalists and specialists in sediment of Tibetan lakes and their role in the stability of metacommunity cooccurrence network. Our results showed that the habitat generalists exhibited broader environmental thresholds and closer phylogenetic clustering than specialist counterparts. In contrast, the specialists exhibited stronger phylogenetic signals of ecological preferences compared with the habitat generalists. Stochastic processes dominated the habitat generalist (63.2%) and specialist (81.3%) community assembly. Sediment pH was the major factor mediating the balance between stochastic and deterministic processes in the habitat generalists and specialists. In addition, as revealed by network analysis, the habitat specialists played a greater role in maintaining the stability of metacommunity co-occurrence network. The insights gained from this study can be helpful to understand the mechanisms underlying maintenance of sediment microbial diversity in plateau lakes.

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“…From an ecological point of view, the deterministic process included heterogeneous selection and homogeneous selection, while the stochastic processes included homogenizing dispersal, dispersal limitation, and drift ( Zhou and Ning, 2017 ). In activated sludge, some phylogenetic taxa are in a state of strong selection, while others may be in a state of strong drift ( Sun et al, 2021 ). This study used the newly developed tool iCAMP to study the community assembly mechanism of diverse microbial groups (called “bins”) in DPR activated sludge.…”

Section: Resultsmentioning

confidence: 99%

Ecological Insights Into Community Interactions, Assembly Processes and Function in the Denitrifying Phosphorus Removal Activated Sludge Driven by Phosphorus Sources

et al. 2021

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The microbial characteristics in the wastewater treatment plants (WWTPs) strongly affect their optimal performance and functional stability. However, a cognitive gap remains regarding the characteristics of the microbial community driven by phosphorus sources, especially co-occurrence patterns and community assembly based on phylogenetic group. In this study, 59 denitrifying phosphorus removal (DPR) activated sludge samples were cultivated with phosphorus sources. The results suggested that homogeneous selection accounted for the largest proportion that ranged from 35.82 to 64.48%. Deterministic processes dominated in 12 microbial groups (bins): Candidatus_Accumulibacter and Pseudomonas in these bins belonged to phosphate-accumulating organisms (PAOs). Network analysis revealed that species interactions were intensive in cyclic nucleoside phosphate-influenced microbiota. Function prediction indicated that cyclic nucleoside phosphates increased the activity of enzymes related to denitrification and phosphorus metabolism and increased the α-diversity of microorganism but decreased the diversity of metabolic function. Based on these results, it was assumed that cyclic nucleoside phosphates, rather than inorganic phosphates, are the most available phosphorus source for majority microorganisms in DPR activated sludge. The study revealed the important role of phosphorus source in the construction and assembly of microbial communities and provided new insights about pollutant removal from WWTPs.

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Seasonal dynamics of the microbial community in two full-scale wastewater treatment plants: Diversity, composition, phylogenetic group based assembly and co-occurrence pattern

Cited by 126 publications

References 43 publications

Niche differentiation drives microbial community assembly and succession in full-scale activated sludge bioreactors

Niche differentiation drives microbial community assembly and succession in full-scale activated sludge bioreactors

Distinct strategies of the habitat generalists and specialists in sediment of Tibetan lakes

Ecological Insights Into Community Interactions, Assembly Processes and Function in the Denitrifying Phosphorus Removal Activated Sludge Driven by Phosphorus Sources

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