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Addressing the complexities of microplastic particles and their effects from the laboratory
Summary
This review addressed the complexity of microplastic pollution including the enormous variability in particle properties and environmental contexts that makes it difficult to assess effects on organisms and ecosystems. The authors argued for a more systematic framework to characterize and communicate microplastic hazard that accounts for this complexity rather than relying on oversimplified models.
The ubiquity and complexity of microplastic pollution in natural and built environments is increasingly appreciated by scientific and public audiences alike. Despite widespread interest and concern, there is little consensus on how microplastics may affect organismal or ecosystem health, which impedes mitigation and policy efforts. Many of the research challenges derive from the complexities of microplastics themselves, which vary in size, shape, weathering, polymer identity and chemical additive constituents, to name a few. Controlled laboratory research has been and will continue to be a critical part of disentangling these complexities, both in terms of plastic characteristics and effects. This presentation will discuss two laboratory case studies in this context. The first will discuss how microplastics can affect fish populations with infectious disease outbreaks, highlighting the differences that particle shape, weathering and chemistry have on effect outcome. The second will highlight the advantages of particle characterization with robust analytical approaches, specifically pyrolysis-gas chromatography/mass spectrometry, and how advances in polymer weathering metrics can support effects studies. Together, these will serve to spark discussion on how different fields within the microplastics research community can inform each other, in order to achieve meaningful remediation strategies into the future. Also see: https://micro2024.sciencesconf.org/559732/document
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