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From rivers to marine environments: A constantly evolving microbial community within the plastisphere
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Researchers sampled 107 plastic pieces across four aquatic ecosystems in southern France and found that the sampling location and polymer chemistry were the strongest drivers of plastisphere microbial community composition, while only 11% of samples showed elevated Vibrio pathogen levels compared to surrounding water.
Plastics accumulate in the environment and the Mediterranean Sea is one of the most polluted sea in the world. The plastic surface is rapidly colonized by microorganisms, forming the plastisphere. Our unique sampling supplied 107 plastic pieces from 22 geographical sites from four aquatic ecosystems (river, estuary, harbor and inshore) in the south of France in order to better understand the parameters which influence biofilm composition. In parallel, 48 enrichment cultures were performed to investigate the presence of plastic degrading-bacteria in the plastisphere. In this context, we showed that the most important drivers of microbial community structure were the sampling site followed by the polymer chemical composition. The study of pathogenic genus distribution highlighted that only 11% of our plastic samples contained higher proportions of Vibrio compared to the natural environment. Finally, results of the enrichment cultures showed a selection of hydrocarbon-degrading microorganisms suggesting their potential role in the plastic degradation.
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The aquatic plastisphere: ecology, pathogen dissemination and antimicrobial resistance
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Researchers reviewed the ecology of the aquatic plastisphere — the microbial biofilm community colonizing plastic debris — examining how its composition diverges from natural substrates, how it concentrates human pathogens and antimicrobial resistance genes, and how climate-driven changes in temperature, UV, and salinity may further reshape its microbial makeup and public health risks.
Plastisphere in freshwaters: An emerging concern
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This review introduced the concept of the freshwater plastisphere - the microbial community colonizing plastic debris in rivers and lakes - and found that freshwater plastisphere communities are compositionally distinct from marine ones and from ambient water microbiomes, with implications for pathogen dispersal and plastic degradation in inland waters.
Dynamics and implications of biofilm formation and community succession on floating marine plastic debris
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Researchers examined how biofilms form on plastic debris in aquatic environments and how the resulting microbial communities evolve over time, finding that the plastisphere hosts distinct microbial assemblages including potential pathogens. The study has implications for understanding plastic debris as a vector for microbial dispersal.
Plastisphere assemblages differ from the surrounding bacterial communities in transitional coastal environments
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Researchers found that bacterial communities colonizing plastic particles (the plastisphere) in Portuguese estuarine and beach environments were significantly different from those in surrounding water and sediments, with plastic type and environmental conditions influencing microbial community composition.
The ecology of the plastisphere: Microbial composition, function, assembly, and network in the freshwater and seawater ecosystems
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Researchers studied the communities of bacteria and fungi that colonize microplastic surfaces in freshwater and seawater, forming what scientists call the plastisphere. These microplastic-associated communities were distinctly different from those in surrounding water, and included a higher proportion of disease-causing organisms and species involved in pollutant degradation. The findings suggest that microplastics create new habitats that can harbor pathogens and alter natural microbial ecosystems in ways that may affect water quality and human health.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.