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A perspective on the impacts of microplastics on mosquito biology and their vectorial capacity
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This perspective paper explored how microplastic pollution in aquatic environments could affect mosquito biology and their ability to transmit diseases. Researchers suggest that microplastics in the water where mosquito larvae develop could influence their growth, survival, and potentially their capacity to carry pathogens, representing an understudied intersection between plastic pollution and public health.
Microplastics (plastic particles <5 mm) permeate aquatic and terrestrial ecosystems and constitute a hazard to animal life. Although much research has been conducted on the effects of microplastics on marine and benthic organisms, less consideration has been given to insects, especially those adapted to urban environments. Here, we provide a perspective on the potential consequences of exposure to microplastics within typical larval habitat on mosquito biology. Mosquitoes represent an ideal organism in which to explore the biological effects of microplastics on terrestrial insects, not least because of their importance as an infectious disease vector. Drawing on evidence from other organisms and knowledge of the mosquito life cycle, we summarise some of the more plausible impacts of microplastics including physiological, ecotoxicological and immunological responses. We conclude that although there remains little experimental evidence demonstrating any adverse effect on mosquito biology or pathogen transmission, significant knowledge gaps remain, and there is now a need to quantify the effects that microplastic pollution could have on such an important disease vector.
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Researchers found that mosquito larvae accumulate microplastics from sewage environments and retain them through metamorphosis into adult females, suggesting that mosquitoes could serve as vectors for transporting plastic residues to humans through biting.
Ontogenetic transfer of microplastics and nanoplastics in mosquitoes: a scoping review of environmental and health implications
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This scoping review examines the role of mosquitoes as vectors for transferring microplastics and nanoplastics from aquatic to terrestrial ecosystems through their life cycle. Researchers found evidence that mosquito larvae ingest micro- and nanoplastics in water, which are retained through metamorphosis and carried into terrestrial environments by adult mosquitoes. The study highlights an underappreciated pathway for microplastic dispersal and raises questions about potential implications for organisms that feed on mosquitoes.
Microplastics are getting into mosquitoes and contaminating new food chains
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Mosquito larvae ingest microplastics in aquatic environments and carry them into adult mosquitoes, which are then eaten by birds and other terrestrial animals, creating a novel pathway for microplastics to enter non-marine food chains. This aquatic-to-terrestrial transfer mechanism extends the reach of microplastic contamination far beyond oceans and waterways into land-based ecosystems and potentially human food sources.
Characterization of microplastics found in mosquito oviposition habitats
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Researchers found microplastics in 36 potential mosquito breeding sites in Texas, with higher concentrations in artificial containers and tires than in natural water bodies. Fragments and fibers were the most common forms, and scanning electron microscopy revealed microbial biofilms forming on the plastic surfaces. This study raises a novel concern: microplastic pollution in standing water may interact with mosquito biology and breeding, potentially affecting disease transmission dynamics.
No Effect of Realistic Microplastic Exposure on Growth and Development of Wild-caught Culex (Diptera: Culicidae) Mosquitoes
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Researchers exposed wild-caught Culex mosquito larvae to polystyrene microplastics at environmentally realistic concentrations. The study found no significant effects on body size, development time, or growth rate in either species tested, suggesting that microplastic levels typically found in nature may have minimal impact on these fitness-related traits in mosquitoes.
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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.