Bacterial colonisation of plastic in the Rockall Trough, North-East Atlantic: An improved understanding of the deep-sea plastisphere

Kelly, Max R.; Whitworth, Paul; Jamieson, Alan J.; Burgess, J. Grant

doi:10.1016/j.envpol.2022.119314

Cited by 12 publications

(5 citation statements)

References 94 publications

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“…In contrast to PHB and PR, on CA, verrumicrobial abundance increased from 2.8% in the beginning of the experiment to 16% in CA treatment (Figure ) during the course of the experiment, with Prosthecobacter being the most dominant genera (13.4%; Supplementary Figure 3 of the Supporting Information). Prosthecobacter has also been detected on plastics previously. , …”

Section: Resultsmentioning

confidence: 90%

Degradation Rates and Bacterial Community Compositions Vary among Commonly Used Bioplastic Materials in a Brackish Marine Environment

Eronen-Rasimus

Näkki

Kaartokallio

2022

Environ. Sci. Technol.

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Plastic pollution threatens both terrestrial and aquatic ecosystems. As a result of the pressures of replacing oilbased materials and reducing the accumulation of litter in the environment, the use of bioplastics is increasing, despite little being known about their accurate biodegradation in natural conditions. Here, we investigated the weight attrition and degradation behavior of four different bioplastic materials compared to conventional oil-based polyethylene during a 1-year in situ incubation in the brackish Baltic Sea and in controlled 1 month biodegradation experiments in the laboratory. Bacterial communities were also investigated to verify whether putative plasticdegrading bacteria are enriched on bioplastics. Poly-L-lactic acid showed no signs of degradation, whereas poly(3-hydroxybutyrate/ 3-hydroxyvalerate) (PHB/HV), plasticized starch (PR), and cellulose acetate (CA) degraded completely or almost completely during 1-year in situ incubations. In accordance, bacterial taxa potentially capable of using complex carbon substrates and belonging, e.g., to class Gammaproteobacteria were significantly enriched on PHB/HV, PR, and CA. An increase in gammaproteobacterial abundance was also observed in the biodegradation experiments. The results show substantial differences in the persistence and biodegradation rates among bioplastics, thus highlighting the need for carefully selecting materials for applications with risk of becoming marine litter.

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Section: Resultsmentioning

confidence: 90%

Degradation Rates and Bacterial Community Compositions Vary among Commonly Used Bioplastic Materials in a Brackish Marine Environment

Eronen-Rasimus

Näkki

Kaartokallio

2022

Environ. Sci. Technol.

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“…Our network analysis of exposure study samples revealed that a taxon classified as Prosthecobacter , a member of both Daphnia core microbiome and bacterioplankton inoculum community, was linked to PET. This genus is known to thrive in low-nutrient environments and was observed to be enriched in the presence of other plastic polymers including the deep sea plastisphere (Kelly et al, 2022), PET film in stream water (Rummel et al, 2021) and cellulose acetate polymer surface in a brackish marine environment (Eroen-Rasimus et al, 2022). However, this is the first time that its association with PET is reported for freshwater.…”

Section: Discussionmentioning

confidence: 99%

Effects of microplastics on Daphnia-associated microbiomes in situ and in vitro

Krzynowek,

Van de Moortel,

Pichler

et al. 2024

Preprint

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Microplastics (MP) pollution in aquatic environments is a growing global concern. MP, defined as plastic fragments smaller than 5mm, accumulate in freshwater reservoirs, especially those located in urban areas, impacting the resident biota. This study investigated the effects of MP on the performance and microbiome of Daphnia, a keystone organism in freshwater ecosystems, through both in situ sampling of freshwater ponds and a controlled 23-day in vitro exposure experiment. Using 16S rRNA gene sequencing and whole-genome shotgun sequencing, the microbiome community composition and functional capacity was analysed and correlated with MP pollution levels. Urban ponds showed higher MP concentrations in both water and sediment than natural ponds with significant differences in MP composition. Bacterioplankton communities were more diverse and richer than the Daphnia-associated microbiomes. Overall, the in situ study showed that the composition of the Daphnia-associated community co-varied with high MP levels but also with temperature and redox potential. Moreover, the functional analysis showed increased relative abundances of PET degradation enzymes and antibiotic resistance genes (ARGs) in microbiomes from high-MP ponds. In the in vitro experiment, the bacterioplankton inoculum source significantly influenced Daphnia survival and microbiome composition. Daphnia exposed to high MP concentrations inoculated with bacterioplankton pre-exposed to MP exhibited significantly higher survival rates, suggesting potential adaptive benefits from MP-associated microbiomes. Network analysis identified specific taxa associated with MP within the Daphnia microbiome. Our study suggests adaptive responses of freshwater host-associated microbiomes to MP pollution including biodegradation with potential benefits for the host.

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“…Microbial diversity in plastic biofilms is strongly influenced by environmental factors [ 107 ]. The six most common families on PS and PU plastic surfaces in the Northeast Atlantic are Chitinophagaceae , Xanthobacteraceae , Hyphomicrobiaceae , Pseudoalteromonadaceae , Opitutaceae , and Burkholderiaceae [ 108 ]. Flavobacteriaceae and Rhodobacteraceae were commonly found on biofilms of PP, PE, PET, and PVC in the Fal Estuary [ 109 ].…”

Section: Plastic Biodegradation Mechanismsmentioning

confidence: 99%

Biodegradation of Typical Plastics: From Microbial Diversity to Metabolic Mechanisms

Lv,

Li,

Zhao

et al. 2024

IJMS

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Plastic production has increased dramatically, leading to accumulated plastic waste in the ocean. Marine plastics can be broken down into microplastics (<5 mm) by sunlight, machinery, and pressure. The accumulation of microplastics in organisms and the release of plastic additives can adversely affect the health of marine organisms. Biodegradation is one way to address plastic pollution in an environmentally friendly manner. Marine microorganisms can be more adapted to fluctuating environmental conditions such as salinity, temperature, pH, and pressure compared with terrestrial microorganisms, providing new opportunities to address plastic pollution. Pseudomonadota (Proteobacteria), Bacteroidota (Bacteroidetes), Bacillota (Firmicutes), and Cyanobacteria were frequently found on plastic biofilms and may degrade plastics. Currently, diverse plastic-degrading bacteria are being isolated from marine environments such as offshore and deep oceanic waters, especially Pseudomonas spp. Bacillus spp. Alcanivoras spp. and Actinomycetes. Some marine fungi and algae have also been revealed as plastic degraders. In this review, we focused on the advances in plastic biodegradation by marine microorganisms and their enzymes (esterase, cutinase, laccase, etc.) involved in the process of biodegradation of polyethylene terephthalate (PET), polystyrene (PS), polyethylene (PE), polyvinyl chloride (PVC), and polypropylene (PP) and highlighted the need to study plastic biodegradation in the deep sea.

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Bacterial colonisation of plastic in the Rockall Trough, North-East Atlantic: An improved understanding of the deep-sea plastisphere

Cited by 12 publications

References 94 publications

Degradation Rates and Bacterial Community Compositions Vary among Commonly Used Bioplastic Materials in a Brackish Marine Environment

Degradation Rates and Bacterial Community Compositions Vary among Commonly Used Bioplastic Materials in a Brackish Marine Environment

Effects of microplastics on Daphnia-associated microbiomes in situ and in vitro

Biodegradation of Typical Plastics: From Microbial Diversity to Metabolic Mechanisms

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