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Vignette 10: Biological Repercussions from Microplastics in the Salish Sea
Summary
This vignette summarises the biological risks of microplastics to marine organisms in the Salish Sea, covering ingestion, physical effects, and chemical toxicity. Researchers concluded that while current concentrations may not yet be causing widespread harm, continued accumulation and the presence of plastic-associated toxins are cause for concern.
Microplastic (< 5 mm) consumption and the movement of microplastic through the marine food web is an emerging concern in the Salish Sea. Upon consumption, marine plastics can physically and chemically affect marine organisms. Effects from plastics may be unique among species, types of contaminants, and types and sizes of plastics. Existing research indicates that current microplastic concentrations within the Salish Sea are not a significant threat to marine organisms. However, factors such as increasing urbanization and climate change may create or exacerbate microplastics impacts on Salish Sea species.