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Impact of Synthetic Microfibers on Cellular and Biochemical Biomarkers in Mussel Mytilus galloprovincialis
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Scientists found that tiny plastic fibers from clothing and fishing gear can harm mussels by damaging their cells and disrupting important body functions, even at pollution levels currently found in our oceans. This matters because mussels filter water and are eaten by humans, so plastic pollution that harms these shellfish could also affect the safety of seafood we consume. The study shows that microplastic pollution is already at levels that can damage marine life we depend on for food.
Synthetic or plastic microfibers (MFs) are an emerging form of microplastic pollution in marine ecosystems, derived from textile degradation and weathering of fishing and aquaculture gear. Despite extensive evidence of MFs in marine organisms, the effects of MFs exposure on mussels remain poorly understood. This study investigated the impact of synthetic MFs on the mussel Mytilus galloprovincialis (Lamarck, 1819) over a semi-chronic time scale of 14 days, using MFs produced by grinding a microfiber cloth. Adult mussels were exposed to three MFs treatments: 8, 40, and 100 MFs/L, reflecting current and future scenarios in the Black Sea. Biomarkers assessed included lysosomal membrane stability (LMS), catalase (CAT), glutathione-S-transferase (GST), and acetylcholinesterase (AChE) activities. Significant lysosomal membrane destabilization (p < 0.05) occurred across all treatments. CAT activity in the digestive gland significantly decreased by 31.2%, 53.3%, and 62.1% at 8, 40, and 100 MFs/L, respectively. GST activity showed inhibition at 8 and 100 MFs/L and stimulation at 40 MFs/L. AChE activity decreased at 8 MFs/L but increased at higher concentrations. These results indicate that even environmentally relevant levels of synthetic MFs can alter cellular stability and enzymatic responses in mussels, suggesting potential ecological risks for marine bivalves.
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Scientists exposed mussels to microplastic particles for just three days and found real damage: broken DNA, cell stress, and weakened internal cell defenses. Since mussels and other shellfish are commonly eaten and also serve as an early warning system for ocean pollution, this research suggests microplastics in our waters could be causing cellular harm—though more research is needed to know what this means for people who eat seafood or are otherwise exposed to microplastics long-term.
Bioaccumulation and depuration dynamics of polyester microfibres in Mytilus galloprovincialis
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Scientists tested how mussels—a popular seafood—absorb and get rid of tiny polyester fibers (like those shed from synthetic clothing) at different exposure levels, and found that higher exposure didn't necessarily mean more fibers stayed trapped in the mussels' bodies. Even more notably, the "clean" mussels used as a comparison group already had microplastic fibers in them before the experiment even started, showing just how widespread this contamination already is. This matters because it suggests eating mussels and other shellfish is a likely route for microplastics to enter our diets, even from seafood we assume is uncontaminated.
Distribution and Effects of Model Palladium-Doped Nanoplastics in the Marine Mussel Mytilus galloprovincialis
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Scientists fed mussels tiny plastic particles (nanoplastics) to see what happens when these pollutants enter the food chain, and found that most of the plastic passed through the mussels' waste, but a small amount stayed in their tissue and was linked to damage in their digestive system. Since mussels and other shellfish are commonly eaten by humans, this research matters because it suggests nanoplastics from ocean pollution could potentially affect the seafood we consume, though more research is needed to know if longer exposure causes bigger problems.
Polystyrene nanoplastics in the marine mussel Mytilus galloprovincialis.
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This study investigated how polystyrene nanoplastics affect Mediterranean mussels, an important marine species and human food source. Researchers found that these tiny plastic particles can cross cell membranes, accumulate in tissues, and trigger oxidative stress and immune responses. The findings suggest that nanoplastic pollution in the ocean could affect both marine ecosystem health and the safety of seafood consumed by people.
Impacts of microplastic fibres on the marine mussel, Mytilus galloprovinciallis
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Scientists exposed marine mussels to dryer lint as a proxy for microplastic fibers from laundry and found physiological changes including reduced clearance rates and histopathological damage to gill and digestive gland tissue.
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