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Determining microplastics bioaccumulation in Babylonia spirata adopting nuclear analysis technique
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Scientists used a radioactive tracking method to see how much microplastic builds up in a type of sea snail, finding that the snails absorbed more of it depending on the saltiness of the water and how much microplastic was around. This matters because these snails are eaten by other animals (and sometimes people), meaning microplastics could be working their way up the food chain into our seafood.
The purpose of this study is to measure the bioaccumulation of iodine-131-labeled polystyrene sulfonate as a microplastic model using nuclear techniques. The biokinetic analysis in this study includes bioaccumulation and depuration of iodine-131-labeled polystyrene sulfonate influenced by the variation of seawater salinity and microplastic concentration. Biokinetic calculations include concentration factor, uptake constant, depuration, elimination constant, and biological half-life. The experimental results showed that the highest bioaccumulation of iodine-131-labeled polystyrene sulfonate was found at a salinity of 32 g·L−1 (5.1 × 10−5 mL·g−1) and at a microplastic concentration of 3.85 mg·L−1 (2.88 × 10−5 mL·g−1). The experimental results show that microplastics were accumulated in B. spirata, and might enter the food chain in the marine ecosystem.
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"This ecotoxicological review examined how microplastics accumulate in aquatic organisms across multiple trophic levels, documenting impacts on physiology, reproduction, and behavior, as well as the transport of associated chemical contaminants through food webs. Because humans sit at the top of aquatic food chains, the bioaccumulation dynamics described here translate directly into dietary microplastic exposure, making ecotoxicological endpoints in fish and shellfish key indicators of human health risk."
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Researchers reviewed how microplastic exposure affects reproduction and physiology in freshwater aquatic organisms, finding that plastic particles disrupt hormonal signaling, reduce fertility, and impair development across a range of sensitive freshwater species.
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Researchers reviewed how microplastics — tiny plastic particles under 5mm — harm aquatic ecosystems, documenting that fish, invertebrates, and other marine life can ingest them, leading to physical damage, toxic chemical exposure, and disruptions to feeding and reproduction.
Microplastics in Biota
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Microplastics have been detected in biota across marine, freshwater, and terrestrial ecosystems, demonstrating their ability to enter food webs at multiple trophic levels. Their omnipresence in living organisms raises concerns about bioaccumulation of both the plastic particles and the chemical additives and adsorbed pollutants they carry.
Microplastics in Biota
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Researchers summarized evidence that microplastics have infiltrated living organisms across marine, freshwater, and terrestrial ecosystems, posing a broad threat to biodiversity. Their persistence in biological tissues means they can accumulate up the food chain, ultimately reaching humans through diet.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.