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Field study of the microplastic pollution in sea snails (Ellobium chinense) from mangrove forest and their relationships with microplastics in water/sediment located on the north of Beibu Gulf
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Scientists measured microplastics in tissues of sea snails (Ellobium chinense) collected from mangrove forests in the Beibu Gulf, finding contamination in soft tissues but not shells, with fiber type and color patterns matching those in local water and sediment samples.
Laboratory studies demonstrated that the mussels were good model organisms in revealing microplastics (MPs) uptake and toxicity. However, only limited field study data on the MPs in benthic marine mesoherbivores collected from mangrove forests are currently available. In this study, the MPs in the snails (Ellobium chinense) organs, rather than the shell, from a mangrove forest were dominant fraction (maximum reaching to 60%). Unexpectedly, no significant linear relationships were found between the levels of MPs in the organs of the snails and the levels in the sediment/tidal water. Further studies were done to explore the sources of the MPs in snail organs. MPs in snail organs at both the landward (interior) and seaward (exterior) zones mainly origin from the pore water. Moreover, the MPs found in the snails showed no relevance to the particulate matter (PM) collected from pore water. The findings reported here imply that both the MPs and PM in pore water affect the extent of MPs enter into the organs of benthic marine mesoherbivores collected from mangrove forest.
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This review summarizes existing studies on microplastics found in snails and other gastropods from oceans, rivers, and mangroves worldwide. Mangrove-dwelling gastropods had the highest microplastic counts, fibers and fragments were the most common types found, and larger species tended to carry more microplastic particles than smaller ones.
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Researchers found high concentrations of microplastics inside horn snails from an Indonesian mangrove ecosystem, with film-type plastic dominating in both the animals and surrounding sediment. Mangrove-associated shellfish are important food sources for local communities, making microplastic contamination in these animals a potential human health concern.
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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.