Summary
This systematic review synthesised toxicological data from 294 studies on polystyrene micro- and nanospheres to advance hazard assessment of plastics contamination. Aquatic invertebrates were the most extensively studied, whilst nanosized particles received more attention than microsized variants, and approximately 40% of available data reported no organismal effects. The authors highlight critical research gaps—particularly the need for environmentally relevant concentrations, broader organism coverage, co-exposure studies, and improved methods for plastic identification and bioaccumulation assessment.
Regional applicability
The findings are directly relevant to UK environmental regulation and risk assessment of plastic contamination in freshwater and terrestrial ecosystems. The identified gaps in bioaccumulation data and co-exposure studies should inform UK and EU research priorities and policy development around microplastics monitoring and regulatory limits.
Key measures
Toxicity endpoints across multiple organism groups; prevalence of acute vs. chronic exposure studies; frequency of no-effect findings; study distribution by organism type and particle size; identification of toxicity mechanisms
Outcomes reported
A systematic analysis of 294 peer-reviewed papers on polystyrene micro- and nanosphere toxicity across microorganisms, aquatic and terrestrial invertebrates, fish, and higher plants. The review identified research gaps, exposure patterns, and knowledge distributions across organism types and exposure scenarios.
Topic tags
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