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The Plastisphere Paradigm
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Tiny plastic bits (microplastics) floating around in water, soil, and even our environment don't stay bare—bacteria and other microbes quickly coat them in a slimy layer called a "plastisphere," turning each plastic fragment into a floating home for germs. This matters because these colonized microplastics have been linked to gut problems, immune reactions, and other health issues when ingested, and the microbial coating can make plastics stickier and potentially help harmful bacteria travel further into our food and water systems. This chapter reviews existing research on how these microbial communities form on plastics across oceans, lakes, and land, rather than pres
Microplastics (MPs), which first showed effects as early as the late 1960s and can cause problems in the gastrointestinal tract, are especially reduced fitness, systemic immunological responses, occurrence of severe toxicological effects, reduced fecundity and increased mortality, among many others. MP is a plastic fragment with a diameter of less than 5 mm and is classified as primary or secondary. Primary MPs are found in toothpaste as well as certain cosmetics, and cause direct MP pollution after discarded to the environment. An extracellular polymeric matrix surrounds an array of microorganisms, forming biofilms. In addition to offering many advantages for competition and survival, biofilms can protect against toxic substances and desiccation. A “plastisphere” is a biofilm formed by bacteria and fungi that attaches to and colonizes MP surfaces as soon as the material enters the system. In addition to providing physical support and nutrient supply, MPs can also provide habitats that aid microorganism survival in harsh environments. By forming biofilms on MPs surfaces, they become stickier and dense, primarily by producing extracellular polymeric substances, which encourage aggregate formation and higher-density complexes. Microorganisms can form microbial assemblages in the early colonization stage and cover as much plastic as possible. EPS facilitates adhesion to surfaces and assists in cell-cell interactions by adhering to proteins and producing pili. A plastisphere is commonly enriched in bacteria like Proteobacteria , Bacteroidetes , Firmicutes , and Cyanobacteria. On plastic debris, diatoms are often reported to be the first and even dominant colonizers. Among MPs, Bacillus has shown a wide-spread and powerful biodegradation potential. This chapter will focus on how the biofilms formed with the help of microbial communities on providing insights into how microbial biofilms interact with MPs in marine, freshwater, and terrestrial ecosystems, including the types of MPs and their sources.
More Papers Like This
Environmental Fate, Plastisphere Microbial Dynamics, and Human Health Implications of Marine Micro- and Nanoplastics
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Tiny plastic bits in the ocean don't just float around alone—they quickly become coated with microbes, forming a kind of floating microbial ecosystem called the "plastisphere" that can carry harmful bacteria and chemicals through the food chain. This review of existing research suggests that exposure to these microplastics may be linked to inflammation, hormone disruption, and gut bacteria imbalances in animals, and possibly humans too—though scientists still need better tools to measure exactly how much risk this poses to our health.
Biofilms on microplastics across ecological systems: Formation mechanisms, community composition, environmental impacts, and ecotoxicity
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Tiny plastic particles floating in water, soil, and air quickly get coated with layers of bacteria, fungi, and other microbes, kind of like plaque on teeth, forming what scientists call a "plastisphere." This review pulls together existing research showing these microbial coatings can make microplastics more dangerous by helping them carry disease-causing germs, antibiotic-resistant genes, and toxic chemicals like heavy metals and PFAS ("forever chemicals") into our food and water. The takeaway: microplastics aren't just plastic, they're rafts for harmful microbes and pollutants, which means understan
Microbial Plastisphere
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This book chapter examines the microbial communities that colonize waterborne plastic surfaces, forming the so-called plastisphere. The author discusses how microplastics serve as surfaces for biofilm formation and how plastic-associated microbes may differ from free-living communities in ways that have ecological implications.
Biofilm formation and its implications on the properties and fate of microplastics in aquatic environments: A review
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Researchers reviewed how microplastics in water attract and support communities of bacteria and other microorganisms that form biofilms — living coatings that alter the plastic particles' movement, help them carry pathogens, and affect how toxic chemicals attached to the plastic are absorbed by living things. Understanding this "plastisphere" ecosystem is critical for predicting where microplastics go and how harmful they become.
Surfing and dining on the “plastisphere”: Microbial life on plastic marine debris
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This review examines the microbial communities — the "plastisphere" — that colonize floating plastic debris in the ocean, discussing how these biofilms form, who lives in them, and what risks they may pose to marine ecosystems and human health. The unique chemistry and buoyancy of plastic creates a novel habitat that can transport potentially harmful microbes across ocean basins.
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