Low-dosage ozonation in gas-phase biofilter promotes community diversity and robustness

Yeung, Marvin; Saingam, Prakit; Xu, Yang; Xi, Jinying

doi:10.1186/s40168-020-00944-4

Cited by 11 publications

(3 citation statements)

References 47 publications

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“…Correlation-based network analysis offers new insights into microbial community structure and its co-occurrence patterns, showing ecological interactions ( Yeung et al, 2021 ). Modularity is an important indicator of ecosystem stability and resilience ( Sharaf et al, 2019 ).…”

Section: Discussionmentioning

confidence: 99%

A comprehensive comparison of fecal microbiota in three ecological bird groups of raptors, waders, and waterfowl

et al. 2022

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Gut microbiota plays a vital role in maintaining the health and immunity of wild birds. However, less is known about the comparison of fecal microbiota between different ecological groups of wild birds, particularly in the Yellow River National Wetland in Baotou, China, an important transit point for birds migrating all over the East Asia-Australian and Central Asian flyways. In this study, we characterized the fecal microbiota and potential microbial function in nine bird species of raptors, waders, and waterfowl using 16S rRNA gene amplicon sequencing to reveal the microbiota differences and interaction patterns. The results indicated that there was no significant difference in α-diversity, but a significant difference in β-diversity between the three groups of birds. The fecal bacterial microbiota was dominated by Firmicutes, Proteobacteria, Actinobacteria, and Bacteroidetes in all groups of birds. Furthermore, we identified five bacterial genera that were significantly higher in raptors, five genera that were significantly higher in waders, and two genera that were more abundant in waterfowl. The bacterial co-occurrence network results revealed 15 and 26 key genera in raptors and waterfowls, respectively. The microbial network in waterfowl exhibited a stronger correlation pattern than that in raptors. PICRUSt2 predictions indicated that fecal bacterial function was significantly enriched in the antibiotic biosynthesis pathway in all three groups. Metabolic pathways related to cell motility (bacterial chemotaxis and flagellar assembly) were significantly more abundant in raptors than in waders, whereas waders were enriched in lipid metabolism (synthesis and degradation of ketone bodies and fatty acid biosynthesis). The fecal microbiota in waterfowl harbored more abundant vitamin B6 metabolism, RNA polymerase, and tyrosine and tryptophan biosynthesis. This comparative study revealed the microbial community structure, microbial co-occurrence patterns, and potential functions, providing a better understanding of the ecology and conservation of wild birds. Future studies may focus on unraveling metagenomic functions and dynamics along with the migration routine or different seasons by metagenomics or metatranscriptomics.

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Section: Discussionmentioning

confidence: 99%

A comprehensive comparison of fecal microbiota in three ecological bird groups of raptors, waders, and waterfowl

et al. 2022

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“…Alpha and Beta diversity metrics were evaluated by QIIME2 version 2020.2 [ 15 , 16 ], and differential analysis among groups on alpha diversity metrics was processed by one-way ANOVA. Linear discriminant analysis (LDA) effect size (LEfSe) analyses were performed using the LEfSe tool [ 17 ], and LDA log-score threshold was set to 3.0 [ 18 , 19 ]. The metagenomes and function of the intestinal microbiota were analyzed using the PICRUSt2 ( accessed on 1 August 2022) and the differences in KEGG pathways between groups were analyzed by using STAMP (version 2.1.3) [ 20 ], the significance of the difference in function abundance between groups was evaluated by one-way ANOVA.…”

Section: Methodsmentioning

confidence: 99%

Influence of Lonicera japonica and Radix Puerariae Crude Extracts on the Fecal Microbiome and Nutrient Apparent Digestibility of Finishing Pigs

Liu

Zheng

et al. 2022

Animals

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This study aims to investigate the influence of adding Lonicera japonica (L. japonica) and Radix Puerariae crude extracts and their mixture to the diet of finishing pigs on their fecal microbes and nutrient apparent digestibility. A total of 72 healthy Duroc × Landrace × Yorkshire crossbred barrows without significant differences in body weight (93 ± 2 kg) were selected and randomly divided into four groups (18 in each group). Three replicate pens per group (six pigs per pen) were used, and two pigs were evaluated for each pen. The groups were fed the following diets: control group (CON), basic diet; chlorogenic acid group (CGA group), basic diet + 1 kg/ton L. japonica crude extract; Pueraria flavonoid group (PF group), basic diet + 1 kg/ton Radix Puerariae crude extract; and mix group (Mix group), basic diet + 0.5 kg/ton L. japonica crude extract + 0.5 kg/ton Radix Puerariae crude extract. The following results were obtained: (1) At the phylum level, Bacteroidetes, Firmicutes, Spirochaetes, Proteobacteria, Fibrobaeteres, and Kiritimatiellaeota were the main components of the fecal microbiota (top 5); the relative abundance of bacteria from phyla Firmicutes significantly increased in the Mix group than in the CON group (p < 0.05). At the genus level, Treponema_2, Rikenellaceae_RC9_gut_group, uncultured_bacterium_f_Lachnospiraceae, uncultured_bacterium_f_Prevotellaceae, and Prevotellaceae_NK3B31_group were the main components of the fecal microbiota (top 5); the relative abundance of bacteria from genus Lactobacillus significantly increased in the Mix group than in the CON group (p < 0.05). Chao1 and Ace counts were significantly higher in group CGA than in the CON group and group Mix (p < 0.05). The alpha and beta diversities and the relative abundance of fecal microbes were higher in all test groups than in the CON group. (2) The protein digestibility was significantly higher in the CGA and PF groups than in the CON group, and the TP digestibility was significantly higher in the CGA than in the CON and Mix groups (p < 0.05). In conclusion, Lonicera japonica and Radix Puerariae crude extract supplementation in the diet significantly changed fecal microbiota and improved the protein and TP digestibility of finishing pigs.

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“…The biomass produced by UV-BTF was slightly lower than the single BTF, which was attributed to the effect of UV-generated ozone on microorganisms, and the ozone concentration in the present study is shown in Supplementary Figure S3. Yeung et al (2021) showed that low doses of ozone can significantly improve the overall performance of biofilters by forming a stronger microbiome and improving clogging problems. Therefore, the amount of biomass alone was not Frontiers in Environmental Science frontiersin.org enough to describe the role of microorganisms in the system, and information on the structure of the microbial community was also needed.…”

Section: Carbon Balance Analysis For Rectormentioning

confidence: 99%

Cyclohexane removal and UV post-control of bioaerosols in a combination of UV pretreatment and biotrickling filtration

Sun

Cheng

Luo

et al. 2022

Front. Environ. Sci.

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Biofiltration of hydrophobic and recalcitrant volatile organic compounds faces challenges, and the bioaerosols sourced from the biofiltration might cause secondary pollution. In this study, the combination of ultraviolet photodegradation and biotrickling filtration (UV-BTF) was designed to treat gaseous cyclohexane, and UV post-treatment (post-UV) was further utilized for the bioaerosol emissions management. Results showed that the combined UV-BTF permitted faster biofilm formation and had better removal efficiencies (REs) than the single biotrickling filter (BTF). The maximum elimination capacity (EC) of UV-BTF and single BTF was 4.4 and 1.32 g m−3 h−1, respectively. Carbon balance for the bioreactor showed that both BTF and UV-BTF could convert more than 50% of the initial cyclohexane into microbial biomass. High-throughput sequencing analysis showed that UV-BTF had a richer and more diverse microbial community compared with the single one. The post-UV had a good inactivation effect on the bioaerosols. Not solely the concentrations additionally the particle sizes of the bioaerosols from the post-UV became lower and smaller than those from the single BTF. Microbial analysis showed that UV had a greater impact on the species and quantity of both bacteria and fungi, but mainly on the number of bacteria. Such results suggested that UV could be used as the pretreatment for the enhancement of hydrophobic and recalcitrant VOCs removal in the subsequent biopurification, and also as the post-treatment for the inactivation of some harmful bioaerosols.

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Low-dosage ozonation in gas-phase biofilter promotes community diversity and robustness

Cited by 11 publications

References 47 publications

A comprehensive comparison of fecal microbiota in three ecological bird groups of raptors, waders, and waterfowl

A comprehensive comparison of fecal microbiota in three ecological bird groups of raptors, waders, and waterfowl

Influence of Lonicera japonica and Radix Puerariae Crude Extracts on the Fecal Microbiome and Nutrient Apparent Digestibility of Finishing Pigs

Cyclohexane removal and UV post-control of bioaerosols in a combination of UV pretreatment and biotrickling filtration

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