Bacterial and fungal assemblages and functions associated with biofilms differ between diverse types of plastic debris in a freshwater system

Wang, Long-Fei; Tong, Jiaxin; Li, Yang; Zhu, Jinxin; Zhang, Wenlong; Niu, Lihua; Zhang, Huanjun

doi:10.1016/j.envres.2020.110371

Cited by 66 publications

(23 citation statements)

References 35 publications

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“…(2021) declared that the functional potential of the microbiome on microplastics was different with that in marine water (Bhagwat et al ., 2021). Similarly, differences were also observed in taxon composition among plastisphere and their associated planktonic communities in freshwater ecosystems (Wang et al ., 2020a,b,c; Miao et al ., 2021). Our findings support the general notion that microplastics may serve as unique substrates for specific microbial colonization.…”

Section: Resultsmentioning

confidence: 99%

“…However, larger areas may also introduce more frequent disturbances, induce dispersal limitation, and thus increase stochasticity. While for narrow spatial areas such as our two studies, microplastics tend to support few individuals (e.g., relatively low levels of alpha diversity), which may increase the importance of demographic stochastic process, leading to stronger ecological drift (Zhou and Ning, 2017; Wang et al ., 2020a,b,c). Additionally, small spatial areas may show low levels of environmental heterogeneity, which may increase the role of homogeneous selection.…”

Section: Resultsmentioning

confidence: 99%

“…Additionally, microplastics provide surfaces for distinct microbial colonization and biofilm formation, which is called the ‘plastisphere’ (Wright et al ., 2021; Amaral‐Zettler et al ., 2020; Zettler et al ., 2013). This unique niche can harbour potential pathogens and increase the exchange of antimicrobial resistance genes, representing great scientific and policy concerns (Yang et al ., 2019; Wang et al ., 2020a,b,c).…”

Section: Introductionmentioning

confidence: 99%

“…The neutral community model (NCM) proposed by Sloan et al ., coupled with normalized stochasticity ratios (NST) based on taxonomic and phylogenetic matrices, was applied to confirm the bacterial community assembly processes (Sloan et al ., 2006; Ning et al ., 2019). To further confirm the importance of deterministic and stochastic processes on shaping the plastisphere communities, both microplastic samples and planktonic samples collected from urban rivers in our previous study (Wang et al ., 2020a,b,c) were also analysed. We hypothesized that the structure and composition of microbial communities on the microplastics and in the water were significantly distinct.…”

Section: Introductionmentioning

confidence: 99%

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Contribution of stochastic processes to the microbial community assembly on field‐collected microplastics

Sun

Zhang

Duan

et al. 2021

Environmental Microbiology

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Summary A growing body of evidence suggests that microplastics may be colonized with a unique microbiome, termed ‘plastisphere’, in aquatic environments. However, the deep mechanisms (deterministic and/or stochastic processes) underlying the community assembly on microplastics are still poorly understood. Here, we took the estuary of Hangzhou Bay (Zhejiang, China) as an example and examined the assembly mechanisms of bacterial communities in water and microplastic samples. Results from high‐throughput sequencing showed that Proteobacteria, Firmicutes, and Actinobacteria were the dominant phyla across all samples. Additionally, microorganisms from plastisphere and planktonic communities exhibited contrasting taxonomic compositions, with greater within‐group variation for microplastic samples. The null model analysis indicated the plastisphere bacterial communities were dominantly driven by the stochastic process of drift (58.34%) and dispersal limitation (23.41%). The normalized stochasticity ratio (NST) also showed that the community assembly on microplastics was more stochastic (NST > 50%). Based on the Sloan neutral community model, the migration rate for plastisphere communities (0.015) was significantly lower than that for planktonic communities (0.936), potentially suggesting that it is the stochastic balance between loss and gain of bacteria (e.g., stochastic births and deaths) critically shaping the community assembly on microplastics and generating the specific niches. This study greatly enhanced our understanding of the ecological patterns of microplastic‐associated microbial communities in aquatic environments.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Contribution of stochastic processes to the microbial community assembly on field‐collected microplastics

Sun

Zhang

Duan

et al. 2021

Environmental Microbiology

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“…Although fungi have high phylogenetic diversity and diverse metabolic potential, they have received little attention in biofilm colonisation on different substrates. Fungi can play a variety of ecological roles (e.g., decomposers of organic matter, predators, endophytes, or pathogens; Wang et al, 2020 ). In our study, the trophic mode of fungi on PVC was symbiotroph, and saprotroph was the main fungal trophic mode of biofilms on pebble.…”

Section: Discussionmentioning

confidence: 99%

Periphytic Biofilm Formation on Natural and Artificial Substrates: Comparison of Microbial Compositions, Interactions, and Functions

et al. 2021

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Periphytic biofilms have been widely used in wastewater purification and water ecological restoration, and artificial substrates have been progressively used for periphyton immobilisation to substitute natural substrates. However, there is insufficient knowledge regarding the interaction network structure and microbial functions in biofilm communities on artificial substrates, which are essential attribute affecting their applications in biofilm immobilisation. This study compared the community structure, co-occurrence network, and metabolic functions of bacterial and microeukaryotic periphytic biofilms during a 35-day indoor cultivation on artificial substrates, such as artificial carbon fibre (ACF) and polyvinyl chloride (PVC), and natural substrates, such as pebble and wood. Results demonstrated that different types of artificial substrates could affect the community composition and functional diversity of bacterial and microeukaryotic biofilms. The bacterial and microeukaryotic community on ACF and PVC showed significantly higher Simpson index compared to those on wood. Bacterial networks on artificial substrates were more complex than those on natural substrates, while the keystone species on natural substrates were more abundant, indicating that the bacterial communities on artificial substrates had stronger stability and resistance to external interference. Furthermore, the functional metabolic profiles predicted showed the abilities of bacterial communities to metabolise nitrogen and carbon sources colonised on artificial substrates were stronger than those on natural substrates. These findings demonstrated that artificial substrates could be special niches for microbial colonisation, possibly altering microbial compositions, interactions, and functions. Therefore, this study provides a powerful theoretical basis for choosing suitable artificial substrates for microbial aggregation and immobilisation technology.

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Early Biofilm Accumulation in Freshwater Environments on Different Types of Plastic

Hoover

León²,

Gallo

2022

Assessing the Microbiological Health of Ecosystems

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Bacterial and fungal assemblages and functions associated with biofilms differ between diverse types of plastic debris in a freshwater system

Cited by 66 publications

References 35 publications

Contribution of stochastic processes to the microbial community assembly on field‐collected microplastics

Contribution of stochastic processes to the microbial community assembly on field‐collected microplastics

Periphytic Biofilm Formation on Natural and Artificial Substrates: Comparison of Microbial Compositions, Interactions, and Functions

Early Biofilm Accumulation in Freshwater Environments on Different Types of Plastic

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