We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Navigating a Microplastic Sea: How the Pacific Cupped Oyster (Magallana gigas) Respond to Microplastic Pollution in Lagoons
AI summary Read the abstract
Researchers examined microplastic contamination in Pacific cupped oysters from two Italian coastal lagoons and tested how oysters respond to different colors of polyethylene microplastic fragments. They found that oysters accumulated microplastics regardless of particle color, and that exposure triggered measurable stress responses. The study highlights that commercially important shellfish in coastal lagoons are directly affected by microplastic pollution, raising questions about seafood safety.
Microplastic pollution poses an escalating concern, particularly in coastal lagoons rich in biodiversity. This study delved into the occurrence of microplastics (MPs) in Magallana gigas (formerly Crassostrea gigas) from the Orbetello and Varano coastal lagoons (Italy), also investigating the response of these filter-feeding organisms to various colors (P = pink; B = blue; W = white) of high-density polyethylene (HDPE) MP fragments. Oysters were exposed for 7 days under controlled conditions. Subsequently, the oysters underwent analysis for both MP presence and biochemical markers of oxidative stress. Diverse ingestion rates of HDPE were noted among oysters from the two lagoons, eliciting antioxidant responses and modifying baseline activity. The two-way ANOVA revealed the significant effects of treatment (control; HDPE_B; HDPE_P; HDPE_W), site, and the interaction between treatment and site on all biomarkers. Non-metric multidimensional scaling showed a divergent effect of HDPE color on biomarkers. Further investigation is warranted to elucidate the mechanisms underlying the influence of MP color, dose-dependent effects, and the long-term impacts of exposure. Comprehending these intricacies is imperative for devising effective strategies to mitigate plastic pollution and safeguard marine health.
More Papers Like This
Tissue-specific accumulation and integrated toxicological responses of the Pacific oyster, Crassostrea gigas, to chronic polyethylene microplastic exposure: An empirical toxicokinetic interpretation
AI summary Read the abstract
Scientists found that oysters exposed to microplastics for weeks build up the most plastic in their digestive glands, and this buildup was linked to stress hormones, liver-related enzymes, and immune changes. Since oysters are widely eaten, this suggests microplastic pollution could affect the health and safety of seafood, though more research is needed to know what this means for humans.
Microplastic contamination in filter-feeding oyster Saccostrea cuccullata: Novel insights in a marine ecosystem
AI summary Read the abstract
Researchers examined microplastic contamination in the filter-feeding oyster Saccostrea cuccullata collected from five coastal sites. They found microplastics present in all oyster specimens, with fibers and fragments being the most common types detected. The study highlights how filter-feeding shellfish can accumulate microplastics from surrounding waters, raising concerns about contamination in marine food chains.
Profiling microplastics in the Indian edible oyster, Magallana bilineata collected from the Tuticorin coast, Gulf of Mannar, Southeastern India
AI summary Read the abstract
This study quantified microplastic contamination in the Indian edible oyster Magallana bilineata collected from India's Gulf of Mannar, finding plastic particles in the majority of oysters sampled. Given the importance of oysters to local diets and fisheries, the results raise direct concerns about human dietary exposure to microplastics through seafood consumption in coastal India.
Intraspecific variations in oyster (Magallana gigas) ploidy does not affect physiological responses to microplastic pollution
AI summary Read the abstract
Researchers compared diploid and triploid Pacific oysters (Magallana gigas) for their physiological responses to microplastic pollution, finding that ploidy does not affect ingestion rates or heart rate response, but that microplastic leachates significantly impaired heart rate regardless of genetic variation.
Toxic effects of exposure to microplastics with environmentally relevant shapes and concentrations: Accumulation, energy metabolism and tissue damage in oyster Crassostrea gigas
AI summary Read the abstract
Researchers exposed oysters to irregularly shaped polyethylene and PET microplastics at two concentrations for 21 days and measured accumulation, energy metabolism, and tissue damage. They found that the microplastics accumulated in oyster tissues, disrupted energy metabolism, and caused histological damage, with effects varying by polymer type and concentration. The study suggests that environmentally realistic microplastic shapes and concentrations can cause measurable harm to commercially important shellfish species.
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.