Microbial community structure and function in sediments from e-waste contaminated rivers at Guiyu area of China

Liu, Jun; Chen, Xi; Shu, Hao yue; Lin, Xue rui; Zhou, Qi; Bramryd, Torleif; Shu, W. S.; Huang, Li

doi:10.1016/j.envpol.2017.12.008

Cited by 135 publications

(54 citation statements)

References 48 publications

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“…Previous studies have shown that the bacterial community structure in estuarine marshes is correlated with salinity, nutrients, pH, and texture, etc. (5,8). Our results showed that soil properties shifted in response to the plant species (Table 1), and sediment TN and AP concentrations were the main factors that were significantly correlated with the soil bacterial community structure (Table 2 and Fig.…”

Section: Figmentioning

confidence: 68%

“…processes and nutrient cycling at initial marsh development (4,5), playing critical roles in marsh ecosystem function. Consequently, knowledge of sediment bacterial communities can improve our understanding of the ecology of salt marsh ecosystems, apart from providing baseline information on how to effectively manage and conserve the declining marsh biodiversity.…”

mentioning

confidence: 99%

“…Deterministic processes include ecological selection influencing bacterial fitness and thereby determining community composition and structure (15). Various deterministic factors, such as environmental conditions (5,8), carbon and nutrient availability (17), and plant diversity (6), have been shown to be important in governing bacterial community structure. Stochastic processes include probabilistic dispersal and random changes in species relative abundances (ecological drift) that are not the consequence of environmentally determined fitness (18,19).…”

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confidence: 99%

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Bacterial Community Assembly in a Typical Estuarine Marsh with Multiple Environmental Gradients

Yao

Liang

et al. 2019

Appl Environ Microbiol

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Bacterial communities play essential roles in estuarine marsh ecosystems, but the interplay of ecological processes underlying their community assembly is poorly understood. Here, we studied the sediment bacterial communities along a linear gradient extending from the water-land junction toward a high marsh, using 16S rRNA gene amplicon sequencing. Bacterial community compositions differed significantly between sediment transects. Physicochemical properties, particularly sediment nutrient levels (i.e., total nitrogen [TN] and available phosphorus [AP]), as well as sediment physical structure and pH (P < 0.05), were strongly associated with the overall community variations. In addition, the topological properties of bacterial cooccurrence networks varied with distance to the water-land junction. Both node- and network-level topological features revealed that the bacterial network of sediments farthest from the junction was less intense in complexity and interactions than other sediments. Phylogenetic null modeling analysis showed a progressive transition from stochastic to deterministic community assembly for the water-land junction sites toward the emerging terrestrial system. Taken together, data from this study provide a detailed outline of the distribution pattern of the sediment bacterial community across an estuarine marsh and inform the mechanisms and processes mediating bacterial community assembly in marsh soils.IMPORTANCESalt marshes represent highly dynamic ecosystems where the atmosphere, continents, and the ocean interact. The bacterial distribution in this ecosystem is of great ecological concern, as it provides essential functions acting on ecosystem services. However, ecological processes mediating bacterial assembly are poorly understood for salt marshes, especially the ones located in estuaries. In this study, the distribution and assembly of bacterial communities in an estuarine marsh located in south Hangzhou Bay were investigated. The results revealed an intricate interplay between stochastic and deterministic processes mediating the assembly of bacterial communities in the studied gradient system. Collectively, our findings illustrate the main drivers of community assembly, taking into consideration changes in sediment abiotic variables and potential biotic interactions. Thus, we offer new insights into estuarine bacterial communities and illustrate the interplay of ecological processes shaping the assembly of bacterial communities in estuarine marsh ecosystems.

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Section: Figmentioning

confidence: 68%

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confidence: 99%

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confidence: 99%

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Bacterial Community Assembly in a Typical Estuarine Marsh with Multiple Environmental Gradients

Yao

Liang

et al. 2019

Appl Environ Microbiol

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“…In this context, the analysis of bacterial diversity may help to define the PAH degradation potential in a sample by identifying bacteria known to be able to metabolize PAHs and by determining their abundance [11,12,36,37]. Interestingly, this metataxogenomics approach can be completed by a metagenomics approach [38][39][40][41][42]. Indeed, the genes present (and thus the degradation potential) in the bacterial community could be predicted by inferring the gene content for each OTU (Operating Taxonomic Unit) from the closest sequenced genomes, via phylogenetic investigation of communities by reconstruction of unobserved states (PICRUSt approach).…”

Section: Introductionmentioning

confidence: 99%

Linking initial soil bacterial diversity and polycyclic aromatic hydrocarbons (PAHs) degradation potential

Crampon

Bodilis

Portet‐Koltalo

2018

Journal of Hazardous Materials

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The aim of this study was to understand the role of indigenous soil microbial communities on the biodegradation of polycyclic aromatic hydrocarbons (PAHs) and to determine whether PAHs degradation potential in soils may be evaluated by analysis of bacterial diversity and potential metabolisms using a metagenomics approach. Five different soils were artificially contaminated with seven selected PAHs and the most abundant bacterial taxa were assessed by sequencing the 16S rRNA gene, and linking them to PAH biodegradation efficiencies. A PICRUSt approach was then led to estimate the degradation potentials by metagenomics inference. Although the role of bacteria in PAHs degradation is not directly established here, the presence of a large number of bacteria belonging to the Betaproteobacteria class correlated to a higher degradation of LMW PAHs. A link with specific bacterial taxa was more difficult to establish concerning HMW PAHs, which seemed to require more complex mechanisms as shown by PICRUSt.

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“…In recent years, microbial pollution at the surface of the material directly threatens human health . These hazards have caused functional failure in the applications of medical implants and devices, food storage and food packaging, biosensors, water purification systems, oil storage and transport systems, and so on.…”

Section: Introductionmentioning

confidence: 99%

Design and synthesis of antibacterial waterborne fluorinated polyurethane

Zhao

Jia

Zhang³

et al. 2018

J of Applied Polymer Sci

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Antibacterial waterborne polyurethanes (WPUs) have attracted increasing attention in a wide range of industrial applications because of their versatile properties as well as ecofriendly nature. Although extensive research has been carried out on antibacterial WBPU synthesis, the roles of some of the key synthesis components remain unclear. In this study, the novel chain extender DMG (dimethylol propionamide containing guanidine group) was designed and synthesized, which has not been reported before. DMG and the waterborne fluorinated polyurethanes containing DMG show high bactericidal (> 99.99%) efficacy against a broad spectrum of gram-positive and gram-negative bacteria. Furthermore, when the amount of DMG reached 5%, the average particle size of waterborne fluorinated polyurethane dispersions was 56.24 nm. And waterborne fluorinated polyurethanes showed good thermal (> 460 C) properties and high crystallization with the increase of chain extender DMG. The successful synthesis of these fascinating antibacterial waterborne materials may provide new insights into the development of protection materials in a sustainable form, which could be applied as coatings in various fields to prevent microbial contamination.

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Microbial community structure and function in sediments from e-waste contaminated rivers at Guiyu area of China

Cited by 135 publications

References 48 publications

Bacterial Community Assembly in a Typical Estuarine Marsh with Multiple Environmental Gradients

Bacterial Community Assembly in a Typical Estuarine Marsh with Multiple Environmental Gradients

Linking initial soil bacterial diversity and polycyclic aromatic hydrocarbons (PAHs) degradation potential

Design and synthesis of antibacterial waterborne fluorinated polyurethane

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