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In Situ Microplastic Ingestion by Marine Zooplankton: a Review
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Tiny ocean creatures called zooplankton, a key food source for fish, are eating microplastics, which could allow these plastic particles to move up the food chain and potentially end up on our plates. This review of existing research finds that most lab studies use much higher microplastic concentrations than what's actually found in the ocean, meaning the real-world health risks are still unclear. Scientists say more real-world (not just lab) studies are needed before we can fully understand how serious this risk really is.
Microplastics (MP) contamination is increasingly prevalent in small lower trophic marine organisms.Zooplankton, as major grazers and an important food source in the oceans, provide a critical pathway for MP transfer and bioaccumulation across marine food webs.Although many studies have reported adverse biological effects of MP ingestion in zooplankton, there is a lack of integration between laboratory findings and field observations.This review aims to identify the knowledge gaps on in situ MP ingestion by zooplankton and the underlying environmental factors influencing the bioavailability and ingestion of MP.Many laboratory studies use elevated concentrations of MP exceeding those reported in the field, and the associated effects may be overestimated.It is important for future experimental designs to integrate ecological relevance to augment the association with the natural environment in evaluating the potential consequences of MP ingestion in a broader range of zooplankton species and life stages.Environmental variables such as rainfall and water movement, and the spatiotemporal overlap of MP and zooplankton, are important factors shaping the bioavailability and ingestion of MP.More field (in situ) studies are necessary to better understand the mechanisms of MP ingestion in the natural environment.
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Microplastic and Nanoplastic Pollution in Zooplankton: A Systematic Literature Review and Bibliometric Analysis of Ingestion, Ecotoxicological Effects, and Research Gaps
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Tiny plastic particles are piling up in the oceans, and this review of 250 studies shows that zooplankton — the microscopic creatures that form the base of the ocean food chain — are eating them, since the plastic bits are often the same size as the food they normally consume. Because zooplankton get eaten by fish, and fish end up on our plates, this matters for understanding how plastic pollution might move up the food chain to humans, though the researchers note most studies so far are lab-based with only a couple of "model" species, so real-world impacts on wild ecosystems and human health are still poorly understood. The big takeaway: scientists need more real
Zooplankton as a suitable tool for microplastic research
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The study suggests that zooplankton can serve as a useful proxy for assessing the presence of microplastic particles in ocean waters, since these organisms ingest plastic particles both intentionally and accidentally. Researchers highlight the advantages of using zooplankton in laboratory studies and emphasize the need for reliable methodologies, especially for detecting smaller microplastic fractions under 100 micrometers.
Occurrence Characteristics and Ecological Risk Assessment of Microplastics in Zooplankton Communities in Jiaozhou Bay, China
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Scientists found tiny plastic pieces inside small sea creatures called zooplankton in a Chinese bay, with higher amounts during warmer months. Since zooplankton are eaten by fish that humans consume, this plastic pollution could potentially work its way up the food chain to our dinner plates. This study helps us understand how widespread plastic pollution has become in marine life that connects to our food supply.
Microplastic Ingestion by Zooplankton
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This study examined whether tiny marine animals called zooplankton can ingest microplastics, and researchers found that thirteen different zooplankton species consumed plastic beads of various sizes. The plastics also stuck to the animals' outer shells and significantly reduced their normal feeding on algae, suggesting that microplastic pollution could disrupt the base of the marine food web.
Bioavailability and effects of microplastics on marine zooplankton: A review
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This review synthesized laboratory and field evidence on microplastic bioavailability and effects on marine zooplankton, finding that multiple taxa readily ingest microplastics with negative impacts on feeding, reproduction, and energy balance, and that zooplankton represent a critical route for transferring microplastics into marine food webs. The authors identify particle size, concentration, and feeding behavior as the main determinants of microplastic bioavailability to zooplankton.
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