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Microbial colonization and degradation of marine microplastics in the plastisphere: A review
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This review explores the "plastisphere" — the community of microorganisms that colonize microplastics floating in the ocean. Researchers found that bacteria, fungi, algae, and other microbes form unique biofilm communities on plastic surfaces, some of which can partially degrade the plastic while others include potentially harmful pathogens. Understanding these microbial communities is important for assessing both the ecological risks and possible bioremediation potential of marine microplastic pollution.
Marine microplastic pollution is a growing problem for ecotoxicology that needs to be resolved. In particular, microplastics may be carriers of "dangerous hitchhikers," pathogenic microorganisms, i.e., Vibrio. Microplastics are colonized by bacteria, fungi, viruses, archaea, algae and protozoans, resulting in the biofilm referred to as the "plastisphere." The microbial community composition of the plastisphere differs significantly from those of surrounding environments. Early dominant pioneer communities of the plastisphere belong to primary producers, including diatoms, cyanobacteria, green algae and bacterial members of the Gammaproteobacteria and Alphaproteobacteria. With time, the plastisphere mature, and the diversity of microbial communities increases quickly to include more abundant Bacteroidetes and Alphaproteobacteria than natural biofilms. Factors driving the plastisphere composition include environmental conditions and polymers, with the former having a much larger influence on the microbial community composition than polymers. Microorganisms of the plastisphere may play key roles in degradation of plastic in the oceans. Up to now, many bacterial species, especially Bacillus and Pseudomonas as well as some polyethylene degrading biocatalysts, have been shown to be capable of degrading microplastics. However, more relevant enzymes and metabolisms need to be identified. Here, we elucidate the potential roles of quorum sensing on the plastic research for the first time. Quorum sensing may well become a new research area to understand the plastisphere and promote microplastics degradation in the ocean.
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A review on marine plastisphere: biodiversity, formation, and role in degradation
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This review explored the "plastisphere," the community of bacteria, fungi, and algae that colonize microplastic surfaces in the ocean. Researchers found that these microbial communities differ from those in surrounding seawater and include species capable of degrading plastic, though the process is extremely slow. Understanding the plastisphere is important because it influences how microplastics behave in the ocean, including whether they sink or float and how they interact with marine life.
Marine Microbial Assemblages on Microplastics: Diversity, Adaptation, and Role in Degradation
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This review examines microbial communities that colonize microplastics in the ocean, collectively known as the plastisphere. Researchers found that these biofilms differ significantly from those on natural surfaces and may include pathogenic bacteria and species capable of partially degrading plastics. The study highlights both the ecological risks of microplastics as vectors for harmful microbes and the potential for harnessing plastic-degrading organisms.
Aquatic Microbial Diversity on Plastisphere: Colonization and Potential Role in Microplastic Biodegradation
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This review examines how microorganisms colonize the surfaces of floating plastic debris in aquatic environments, forming communities known as the plastisphere. Researchers found that certain bacteria and fungi on plastic surfaces show potential for biodegrading the polymers they inhabit. The study suggests that understanding these microbial communities could lead to biological approaches for breaking down microplastic pollution in waterways.
Marine Plastic Debris: A New Surface for Microbial Colonization
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This review examines the "Plastisphere" -- the community of microbes that rapidly colonizes plastic debris in the ocean -- covering biofilm development, potential biodegradation, and the hitchhiking of harmful bacteria. Researchers found that microbial communities on plastics do not dramatically differ from those on other inert surfaces, especially in mature biofilms. The study identifies key knowledge gaps and calls for more environmentally realistic research into how these plastic-associated microbes interact with marine ecosystems.
Plastisphere microbiome: Methodology, diversity, and functionality
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This review explores the plastisphere, the community of microorganisms that colonize plastic debris in the environment. The authors cover methods for studying these microbial communities, the diversity of organisms found living on plastics, and their functional roles including potential plastic degradation and pathogen harboring. Understanding the plastisphere is important because these microbial communities can influence how plastics break down and what health risks plastic pollution may pose.
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