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Impact of microplastics on microbial diversity and pathogen distribution in aquaculture ecosystems: A seasonal analysis
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Researchers studied bacteria growing on microplastics in fish farming waters and found that in summer, these plastic-attached communities became more connected and harbored several disease-causing species including Vibrio. Microplastics in aquaculture act as floating habitats for harmful bacteria, and seasonal warming makes this worse, raising concerns about seafood safety and the spread of infections to humans.
Microplastics, as a prominent emerging pollutant in marine environments, pose a serious threat to the stability of marine ecosystems due to their resistance to biodegradation. MPs act as substrates for biofouling and potentially promote the spread of harmful microorganisms. Research indicates that human activities exacerbate MPs pollution in aquaculture environments, significantly increasing their abundance. This study focused on the aquaculture environment of the large yellow croaker (Larimichthys crocea), one of the most extensively farmed fish species in coastal regions. We conducted a comprehensive analysis of microbial diversity on the biofilms covering MPs and in the surrounding aquaculture water, with a focus on the distribution of pathogens on MPs. Furthermore, this study investigated the impact of seasonal variations on the microbial communities within these biofilms. Sequencing analysis revealed that the α-diversity of microbial communities on MPs was lower than that in aquaculture water during winter but higher in summer, indicating a seasonal shift in microbial community structure. PICRUSt predictions suggested that microbes on MPs possess unique metabolic pathways. Co-occurrence network analysis demonstrated that during summer, the microbial communities on MPs revealed increased connectivity and functional modularity, whereas microbial communities in aquaculture water showed stronger interactions in winter. Additionally, several potential pathogens, including Vibrio and Pseudomonas, were detected in the MPs biofilms. These findings underscore the ways in which MPs influence the microbial community structure in aquaculture environments, increasing health risks to the ecosystem. This research offers significant insights into the ecological impacts of MPs pollution on microbial communities in aquaculture ecosystems.
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Potential impact of marine-derived plastisphere as a Vibrio carrier on marine ecosystems: Current status and future perspectives
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This review examines how microplastics in the ocean serve as floating platforms for Vibrio bacteria, which are significant pathogens threatening aquaculture and marine ecosystem health. Researchers found that the so-called plastisphere, the microbial community that colonizes plastic surfaces, can enhance the survival and spread of these harmful bacteria. The study highlights a concerning link between plastic pollution and the potential amplification of waterborne disease risks.
Assessing the Risks of Potential Bacterial Pathogens Attaching to Different Microplastics during the Summer–Autumn Period in a Mariculture Cage
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Researchers conducted an in situ incubation experiment in a mariculture cage and found that polyethylene terephthalate, polyethylene, and polypropylene microplastics accumulated distinct bacterial pathogen communities during summer and autumn. The findings indicate that microplastics in aquaculture environments can act as reservoirs for potential pathogens, raising concerns for seafood safety.
Exploring changes in microplastic-associated bacterial communities with time, location, and polymer type in Liusha Bay, China
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Researchers tracked how bacterial communities colonizing different types of microplastics changed over time in an aquaculture bay in China. They found that both exposure duration and plastic type significantly influenced which bacteria grew on the surfaces, with hydrocarbon-degrading species becoming notably abundant. Concerning from a health perspective, the pathogenic bacterium Vibrio was detected on all microplastic samples, suggesting that floating plastics may serve as rafts for disease-causing organisms.
The impact of microplastics on antibiotic resistance genes, metal resistance genes, and bacterial community in aquaculture environment
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Researchers discovered that microplastics in fish farming environments carry significantly higher levels of antibiotic resistance genes and disease-causing bacteria like Brucella and Pseudomonas compared to surrounding water. This means microplastics may act as floating platforms that help spread antibiotic-resistant infections through aquaculture, potentially reaching humans who consume the seafood.
The Occurrence of Microplastics and the Formation of Biofilms by Pathogenic and Opportunistic Bacteria as Threats in Aquaculture
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This review examines how microplastics in aquaculture environments serve as habitats and transport vehicles for pathogenic and opportunistic bacteria, with more than 30 taxa of pathogens detected on plastic-associated biofilms. The study suggests that the combination of plastic persistence, closed aquaculture conditions, and pathogen affinity for plastic surfaces creates a significant threat to aquaculture production and food safety.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.