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Environmental microplastics: sources, environmental interactions, ecotoxicological effects and plastivore-mediated biodegradation
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This review pulls together existing research on tiny plastic particles called microplastics, which are showing up almost everywhere in our environment, and even in the insects and animals that eventually end up in our food chain. Interestingly, some insects (like certain beetle and moth larvae) can actually eat and break down these plastics using special gut bacteria, offering a possible natural solution for cleaning up plastic pollution. While this research focuses on insects rather than humans directly, understanding how microplastics affect living creatures' growth and health helps scientists predict potential risks to human health as these particles work their way through ecosystems.
Microplastics (MPs), as emerging pollutants, are potentially ingested by animals in aquatic and terrestrial environments, causing physical harm. The most widely produced synthetic polymers worldwide are polystyrene (PS), polyvinyl chloride (PVC), polyester (PET), polyethene (PE), polyamide (PA), and polypropylene (PP). To reduce microplastic density in the environment, studies evaluate the rate of MP ingestion by insect larvae. The larvae of insect orders Lepidoptera and Coleoptera are widely studied regarding MPs degradation. Additionally, the effect of MPs on insect physiology can be evaluated to further study their impact on human health. The review article focuses on the effect of MPs on growth, gut microbiota, and fertility of both aquatic and terrestrial insects. The paper also deals with widely researched ‘plastivore’ insects and the underlying mechanism of biodegradation and mineralisation of various forms of MPs by these insects. The structural resemblance of synthetic polymers to insect feed makes insects potential degraders of MPs. The change in abundance and type of gut microbiota in MPs-fed insect larvae compared to control larvae implies the significant role of gut microbiota and gut enzymes in MPs biodegradation. Microplastics as a novel feed substrate for plastivore insects.
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Microplastics occurrence, detection and removal with emphasis on insect larvae gut microbiota
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This review covers the sources, detection methods, and toxic effects of microplastics across ecosystems, with a special focus on insect larvae gut microbiota as a biological degradation tool. Researchers found that certain insect larvae, such as mealworms and waxworms, harbor gut bacteria capable of breaking down plastic polymers. The study highlights biological degradation by insect-associated microbes as a promising avenue for microplastic remediation.
Potential of insect gut microbiota in biodegradation of polymeric plastics
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Some insects have gut bacteria that can break down plastics like polyethylene and PVC faster than other methods we currently have—this review pulls together over a decade of research on how this works. While this study focuses on environmental cleanup rather than direct human health effects, it matters to you because less plastic waste in the environment means fewer microplastics breaking down into soil, water, and food supplies, which is an ongoing concern for human health. This research could eventually help scientists develop better ways to tackle plastic pollution using nature's own tools.
Integrative frameworks for plastic biodegradation in insect–microbiome systems: mechanistic insights, emerging multi-omics and enzyme engineering perspectives
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Certain insect larvae (like mealworms) can chew up and break down plastic with help from bacteria living in their guts, offering a possible natural solution to our massive plastic waste problem. This review pulls together what scientists currently know about how this works — a team effort between the insect's own body and its gut microbes — though it's still unclear exactly how much the plastic is being fully broken down versus just partially altered. The bigger payoff: understanding these natural processes could help researchers engineer better enzymes to break down plastic waste at scale, which matters because plastic pollution and the microplastics it creates are increasingly showing up in our food, water
Mechanisms and Perspectives of Microplastic Biodegradation by Insects and Their Associated Microorganisms
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This review examined how insects and their gut microbiota contribute to microplastic biodegradation, summarizing known degradation mechanisms and the microorganisms involved. The authors found that several insect species harbor gut bacteria capable of depolymerizing common plastics like polystyrene and polyethylene, though degradation rates remain too slow for practical remediation at scale.
How much should we care about insect–plastic interactions?
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This review examines the complex interactions between insects and plastic pollution, covering how insects encounter, ingest, and are affected by microplastics and nanoplastics in the environment. Researchers also explored the potential role of certain insect species in degrading plastic waste. The study highlights that while insects may contribute to plastic breakdown, their exposure to plastic particles poses ecological risks that warrant further investigation.
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