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Fate and effects of microplastics in the shrimp Palaemon varians
AI summary
This research characterized microplastic pollution across multiple environmental compartments — water, sediment, and biota — in a coastal lagoon system in southern Europe. The study found that sediments acted as sinks for microplastics, with concentrations orders of magnitude higher than overlying water, and that benthic invertebrates showed higher ingestion rates than pelagic species.
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Assessment of microplastic hazards in Penaeus vannamei shrimp in a typical estuary of China: polymer composition, risk assessment, and health implications
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Researchers assessed microplastic contamination in whiteleg shrimp from the Jiulong River estuary in China, finding five polymer types at 0.46 particles/g, with PVC comprising only 5.52% by count but contributing 98.11% of the total hazard risk index due to its toxic chemical additives. The disproportionate hazard posed by PVC despite its low abundance in farmed shrimp has direct food-safety implications, as commercially important shellfish in estuarine aquaculture systems are accumulating high-risk plastics consumed by people globally.
Ecotoxicological Effects of Microplastics in Marine Zooplankton
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Marine zooplankton ingest microplastics, mistaking them for food, which reduces feeding, impairs reproduction, and can transfer particles up the food chain. Because zooplankton form the base of marine food webs, their ecotoxicological responses to microplastics have cascading consequences for ocean ecosystems and human seafood consumers.
The Impact of Microplastics on Marine Copepods
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Marine copepods, a foundational link in ocean food webs, ingest microplastics alongside natural prey, causing reduced feeding, reproductive impairment, and energy depletion that can cascade up through fish, seabirds, and marine mammals. Because copepods transfer energy from phytoplankton to higher trophic levels, their contamination with microplastics poses systemic risks to entire marine food chains.
Ecotoxicological Consequences of Microplastics in Aquatic Life
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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.
Environmental Fate and Effects of Microplastics on Organisms
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This review examined the environmental fate of microplastics — including fragmentation dynamics, sorption of co-contaminants, and bioaccumulation through food webs — alongside their toxic effects on organisms ranging from invertebrates to mammals. Understanding how plastics persist, concentrate toxicants, and biomagnify through trophic levels is essential for predicting long-term health consequences for wildlife and human consumers.
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.