Response of performance and bacterial community to oligotrophic stress in biofilm systems for raw water pretreatment

Feng, Lijuan; Jia, Rong; Sun, Jing; Wang, Jing; Lv, Zheng-hui; Mu, Jun; Yang, Guoguang

doi:10.1007/s10532-017-9792-y

Cited by 14 publications

(6 citation statements)

References 38 publications

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“…First, community diversity increased with increasing depth, as the environment became more inhospitable. Increasing diversity in poorer environments has also been observed in other biofilm studies in oligotrophic environments …”

Section: Discussionsupporting

confidence: 77%

“…Increasing diversity in poorer environments has also been observed in other biofilm studies in oligotrophic environments. 42 Regarding the community structure, the relative abundance of strict anaerobes and thermophilic bacteria in biofilms increased as the depth increased. Similarly, a previous study reported that thermophiles and strict anaerobes dominated the communities in deep strata (depth, 3500−4000 m).…”

Section: Discussionmentioning

confidence: 99%

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Community Distribution of Biofilms along a Vertical Wellbore in a Deep Injection Well during Petroleum Production

et al. 2021

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In petroleum production, microbial investigations are essential for microbial-induced corrosion (MIC) control and enhanced oil recovery (EOR) processes. It is suggested that microorganisms can attach to the inner wall of pipes as biofilms, which are more stable and could cause more serious corrosion than planktonic microorganisms in the water phase. At present, research on the biofilms during oil production is mainly focused on the surface pipelines, while few reports have directly investigated biofilms in vertical deep wells. Therefore, in this study, wellbore biofilms were sampled during well workover from several well-tube segments corresponding to different original depths (approximately 0, 840, and 1330 m). The injected water was sampled as well. The results of the 16S rRNA gene library sequencing showed that the biofilms and water-phase communities were distinct (dissimilarity of 0.56–0.64), although they shared 64 OTUs. At the phylum level, the relative abundance of Proteobacteria was 74.65% in the water phase and only 7.86–27.41% in the biofilms. The dominant phylum, Firmicutes, was 6.03–41.21% in the three biofilms, while only 1.16% in the water phase. With increasing depth, the biofilm communities became more diverse (Shannon index of 3.43–4.21), more anaerobic, and more thermophilic possibly due to the depleting oxygen and increasing temperature in samples from the deeper well. For instance, the relative abundance of anaerobes (archaea and strict anaerobic bacteria) in biofilms increased from 18.32 to 40.53%. Thermophilic bacteria (such as Kosmotoga) increased from 6.65 to 15.82%. Among methanogens, hydrogenotrophic genera (such as Methanobacterium and Methanolinea) increased from 3.66 to 9.68%. This study revealed the structural differences between water-phase and biofilm communities in the well, and the depth-dependent distribution of the biofilm communities. These results improved the understanding of microbial ecology in wellbores, which will benefit microbial activity control measures applied in oil production processes, including MIC and oil recovery.

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Section: Discussionsupporting

confidence: 77%

Section: Discussionmentioning

confidence: 99%

Community Distribution of Biofilms along a Vertical Wellbore in a Deep Injection Well during Petroleum Production

et al. 2021

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“…Soils at higher altitude are likely to host microbial taxa that adapted to low substrate quality and temperature [ 54 , 55 ]. In support of this, we observed increased abundance of Proteobacteria with increasing altitude, which is always dominant in cold and oligotrophic conditions [ 52 , 56 , 57 ]. Furthermore, the relative abundance of Proteobacteria associated positively with the potential functions involved in nutrient acquisition (i.e., lower Vlength) and qCO 2 (Table S1 ), indicating that environmental selection of specific taxa contribute to community-level changes in physiological traits and metabolic efficiency [ 12 ].…”

Section: Discussionmentioning

confidence: 54%

Soil microbial trait-based strategies drive metabolic efficiency along an altitude gradient

Feng

Zeng

Zhang

et al. 2021

ISME Communications

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Trait-based approaches provide a candidate framework for linking soil microbial community to ecosystem processes, yet how the trade-offs in different microbial traits regulate the community-level metabolic efficiency remains unknown. Herein we assessed the roles of the microbial taxa with particular trait strategies in mediating soil microbial metabolic efficiency along an altitude gradient on the Tibetan Plateau. Results showed that soil microbial metabolic efficiency declined with increasing altitude, as indicated by the increasing metabolic quotient (microbial respiration per unit biomass, qCO2) and decreasing carbon use efficiency (CUE). Both qCO2 and CUE were predominantly predicted by microbial physiological and taxonomic attributes after considering key environmental factors including soil pH, substrate quantity and quality. Specifically, the reduced metabolic efficiency was associated with higher investment into nutrient (particularly for phosphorus) acquisitions via enzymes. Furthermore, we identified key microbial assemblies selected by harsh environments (low substrate quality and temperature) as important predictors of metabolic efficiency. These results suggest that particular microbial assemblies adapted to nutrient limited and cold habitats, but at the expense of lower metabolic efficient at higher altitude. Our findings provide a candidate mechanism underlying community-level metabolic efficiency, which has important implications for microbial-mediated processes such as carbon dynamics under global climate changes.

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“…However, differences in relative abundances of bacterial phyla with elevation might not only be attributed to soil moisture and temperature ( Ren et al, 2018 ) but also to other soil properties ( Supplementary Table S5 ). The U-shaped relative abundance of Nitrospirae with increasing elevation ( Supplementary Figure S1A ) might be associated with its preference for C-limited soil conditions ( Feng et al, 2017 ) and therefore the hump-shaped soil total C content with increasing elevation ( Table 1 ). In addition, relative abundances of Verrucomicrobia and Gemmatimonadetes were both correlated with soil pH and N, but the correlations were the opposite.…”

Section: Discussionmentioning

confidence: 99%

Discrepant diversity patterns and function of bacterial and fungal communities on an earthquake-prone mountain gradient in Northwest Sichuan, China

Huang,

Wang,

Wang

et al. 2023

Front. Microbiol.

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Patterns of microbial diversity on elevational gradients have been extensively studied, but little is known about those patterns during the restoration of earthquake-fractured alpine ecosystems. In this study, soil properties, soil enzyme activities, abundance and diversity of soil bacterial and fungal communities at four positions along a 2.6-km elevational gradient in the Snow Treasure Summit National Nature Reserve, located in Pingwu County, Southwest China. Although there were no significant changes in the soil chemical environment, bacterial and fungal communities were significantly different at different elevations. The overall fungal community presented an N-shaped diversity pattern with increasing elevation, while bacterial diversity decreased significantly with elevation. Changes in microbial diversity were associated with soil phosphorus, plant litter, and variations in dominant microbial taxa. Differences in enzyme activities among elevations were regulated by microbial communities, with changes in catalase and acid phosphatase activities mainly controlled by Acidobacteria and Planctomycetaceae bacteria, respectively (catalase: p < 0.001; acid phosphatase: p < 0.01), and those in β-glucosidase, sucrase, and urease activities mainly controlled by fungi. The β-glucosidase and sucrase were both positively correlated with Herpotrichiellaceae, and urease was positively correlated with Sebacinaceae (p < 0.05). These findings contribute to the conservation and management of mountain ecosystems in the face of changing environmental conditions. Further research can delve into the specific interactions between microbial communities, soil properties, and vegetation to gain deeper insights into the intricate ecological dynamics within earthquake-prone mountain ecosystems.

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Response of performance and bacterial community to oligotrophic stress in biofilm systems for raw water pretreatment

Cited by 14 publications

References 38 publications

Community Distribution of Biofilms along a Vertical Wellbore in a Deep Injection Well during Petroleum Production

Community Distribution of Biofilms along a Vertical Wellbore in a Deep Injection Well during Petroleum Production

Soil microbial trait-based strategies drive metabolic efficiency along an altitude gradient

Discrepant diversity patterns and function of bacterial and fungal communities on an earthquake-prone mountain gradient in Northwest Sichuan, China

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