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From the Depth to the Shore Microplastics in the Food Chain
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Researchers reviewed how microplastics move from deep ocean sediments and surface water into coastal food chains, with particular focus on contamination found in commercial seafood. The widespread presence of microplastics in seafood means that people who regularly eat fish and shellfish are routinely ingesting plastic particles.
Microplastics (MPs) are present in terrestrial and marine environments across the globe. Moreover, MPs in benthic sediments and surface water concern the food chain. Coastal settings and commercial seafood have been found to contain MPs. The massive presence of MPs...
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Researchers reviewed how micro- and nanoplastics contaminate marine-sourced foods including fish, shellfish, and seaweed, raising concerns about human dietary exposure. With billions of metric tons of plastic produced since 1950, ocean food sources represent a significant and growing pathway for plastic particles entering the human body.
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Plastics and microplastics have achieved near-universal distribution in marine environments from surface waters to deep-sea sediments, persisting for decades while fragmenting into increasingly smaller and more biologically available particles. The growing concentration of microplastics in oceans represents a long-term threat to marine biodiversity and the food safety of seafood consumed globally.
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This chapter documented the multiple routes by which microplastics enter the food chain — including ingestion by marine invertebrates, fish, and livestock, as well as contamination of crops via irrigation and soil amendments — and traced their biomagnification potential up the food web to human consumers. Because humans sit at the top of multiple food chains simultaneously, this multi-pathway exposure makes dietary microplastic intake a significant and difficult-to-avoid health concern.
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