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61,005 resultsShowing papers similar to Do Environmentally Relevant Concentrations of Microplastics Pose a Threat to the Eastern Oyster, Crassostrea Virginica?
ClearToxic effects of exposure to microplastics with environmentally relevant shapes and concentrations: Accumulation, energy metabolism and tissue damage in oyster Crassostrea gigas
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.
Impact of polyester and cotton microfibers on growth and sublethal biomarkers in juvenile mussels
Researchers exposed juvenile mussels to polyester and cotton microfibers at realistic ocean concentrations for 94 days and found that polyester microfibers reduced mussel growth rates by up to 36%, suggesting that microplastic fiber pollution could harm marine ecosystems and threaten shellfish aquaculture.
Microplastics and low tide warming: Metabolic disorders in intertidal Pacific oysters (Crassostrea gigas)
Researchers exposed Pacific oysters to environmentally relevant concentrations of microplastics during a simulated tidal cycle and then subjected them to warming during low tide. They found that microplastic exposure disrupted the oysters' metabolism and made them more vulnerable to heat stress, with effects worsening over time even at very low particle concentrations. The study suggests that microplastic pollution may reduce the ability of intertidal shellfish to cope with rising temperatures.
Microplastics exposure in European flat oyster, Ostrea edulis: Evaluation of accumulation and depuration under controlled conditions and molecular assessment of a set of reference genes
Researchers evaluated microplastic accumulation and effects in European flat oysters under controlled exposure conditions, examining how filter feeding concentrates plastic particles and whether ingestion impairs oyster health. Exposure resulted in measurable microplastic accumulation in oyster tissue, with effects observed on feeding behavior and physiological condition.
Are microplastics impacting shellfish?
Researchers investigated whether microplastic contamination measurably impacts shellfish physiology, growth, reproduction, and health outcomes, assessing the ecological and food safety implications of microplastic exposure in commercially and ecologically important bivalve species.
Combined effects of salinity and polystyrene microplastics exposure on the Pacific oysters Crassostrea gigas: Oxidative stress and energy metabolism
Researchers studied how salinity levels affect the toxicity of polystyrene microplastics in Pacific oysters and found that low salinity reduced microplastic uptake but created complex interactions with oxidative stress and energy metabolism. Smaller microplastics generally caused more biological disruption than larger ones across all salinity conditions. This is important because coastal oyster habitats frequently experience salinity changes, and the findings suggest environmental conditions can alter how harmful microplastics are to shellfish.
Realistic environmental exposure to microplastics does not induce biological effects in the Pacific oyster Crassostrea gigas
Pacific oysters were exposed to environmentally relevant concentrations of polyethylene and polypropylene fragments for 10 days followed by depuration, with microplastics detected in tissues but no significant effects on clearance rate, tissue integrity, antioxidant defense, or DNA damage. The results suggest that realistic environmental concentrations of these larger fragments may not cause measurable biological harm to oysters.
Ingestion and depuration of polyester microfibers by Crassostrea gasar (Adanson, 1757).
Researchers exposed the oyster Crassostrea gasar to environmentally sourced polyester microfibers at 0.5 mg/L and found accumulation in gill and digestive gland tissues, with evidence of clearance after a depuration period, raising concerns about microfiber effects on bivalve aquaculture.
Effects of microplastics on European flat oysters, Ostrea edulis and their associated benthic communities
Researchers assessed the effects of microplastics on European flat oysters and their associated benthic communities in outdoor mesocosms. The study found that microplastic exposure affected oyster health and biological functioning, and also altered the structure of surrounding macrofaunal assemblages, demonstrating that microplastic pollution can have community-level ecological impacts.
Effect of High-Density Polyethylene Microplastics on the Survival and Development of Eastern Oyster (Crassostrea virginica) Larvae
Researchers found that high-density polyethylene microplastics negatively affected the survival and development of Eastern oyster larvae, a keystone reef-building species in the Chesapeake Bay, raising concerns about microplastic pollution impacts on estuarine ecosystems.
Accumulation and depuration of microplastic fibers, fragments, and tire particles in the eastern oyster, Crassostrea virginica: A toxicokinetic approach
This study examined the impacts of microplastic ingestion on the feeding behavior and energy budget of the marine amphipod Gammarus fossarum. Microplastic-exposed amphipods showed reduced food intake and lower assimilation efficiency, leading to decreased energy available for growth.
The world is your oyster: low-dose, long-term microplastic exposure of juvenile oysters
Juvenile oysters were exposed to polystyrene microbeads at three concentrations for 80 days to test long-term, low-dose effects, with microbeads detected in the intestines of exposed oysters but no significant impacts on growth, body condition, or lysosomal stability. The study suggests oysters can tolerate chronic low-level microplastic exposure without major physiological harm.
Entanglement and ingestion of microfibers by the oyster pea crab Zaops ostreum, an endosymbiont of the eastern oyster Crassostrea virginica.
Pea crabs living inside eastern oysters were found to both ingest microfibers and become passively entangled in them, suggesting that these endosymbiotic crustaceans are exposed to plastic pollution through their host oysters. Since these oysters are commercially harvested for human consumption, the findings highlight a potential pathway for microplastic exposure through oyster-based seafood.
Microplastics Affect the Ecological Functioning of an Important Biogenic Habitat
Researchers tested how microplastics affect the ecological functioning of oyster and mussel habitats in outdoor mesocosms. The study found that both biodegradable and conventional microplastics at environmentally relevant concentrations can alter filtration rates and nutrient cycling in these important biogenic habitats, suggesting broader ecosystem-level impacts.
Mucus Production as a Strategy of Oysters Against Synthetic Textile Microfibers
Researchers found that oysters exposed to synthetic textile microfibers responded by producing elevated levels of protective mucus in their mantle tissue. This mucus response represents a physiological defense mechanism against microplastic ingestion but may incur energetic costs to the organism.
Experimental ingestion of fluorescent microplastics by pacific oysters, Crassostrea gigas, and their effects on the behaviour and development at early stages
Pacific oyster embryos exposed to polystyrene microbeads showed increased developmental malformations at concentrations above 1 milligram per liter, and 3-day-old larvae exposed briefly to the same concentrations ingested particles in their digestive tract and showed reduced swimming speeds. The study highlights early larval stages as particularly sensitive windows for microplastic-induced developmental disruption.
Minimal impact at current environmental concentrations of microplastics on energy balance and physiological rates of the giant mussel Choromytilus chorus
The mid-term effects of microplastic ingestion at current higher environmental concentrations on the energy balance of marine invertebrates were evaluated. At realistic environmental concentrations, microplastics had minimal impact on energy budgets, suggesting that current field-level exposures may not cause significant energetic costs for studied marine invertebrate species.
Plastic Microfibers Impact the Immune System of the Pacific Oyster
Pacific oysters (Crassostrea gigas) from Morro Bay Estuary were exposed to polyester microfibers and showed altered immune gene expression and elevated hemocyte activity, indicating that microfiber exposure triggers measurable immune system responses in commercially important shellfish.
Environmental and Sublethal Concentrations of Polystyrene Nanoplastics Induced Antioxidant System, Transcriptomic Responses, and Disturbed Gut Microbiota in Oyster Magallana Hongkongensis
Researchers exposed Hong Kong oysters to polystyrene nanoplastics at both environmentally realistic and higher concentrations. Even at the lower, real-world concentrations, the nanoplastics significantly altered the oysters' gut bacteria and gene expression patterns, while higher doses also triggered immune and antioxidant stress responses, raising concerns about food safety and ecosystem health.
Effects of microplastics on bivalves: Are experimental settings reflecting conditions in the field?
A critical comparison of experimental microplastic studies on bivalves found that most laboratory studies used particle concentrations far exceeding environmental levels and polymer types that differ from field observations, concluding that many reported toxic effects may not be ecologically relevant and calling for environmentally realistic experimental designs.
Oyster as sentinels of recent microplastic contamination: Insights from a transplant experiment
Researchers used oyster transplantation experiments to study how microplastics accumulate and are excreted in sentinel organisms under field-realistic conditions. The study found that bivalves can serve as effective biomonitors of recent microplastic contamination in coastal ecosystems. The findings help fill knowledge gaps about the dynamics of microplastic uptake and clearance in marine filter feeders.
The influence of microplastics pollution on the feeding behavior of a prominent sandy beach amphipod, Orchestoidea tuberculata (Nicolet, 1849)
Microplastic pollution was found to reduce feeding activity and slow growth in a beach amphipod (small crustacean), even at environmentally relevant concentrations. This suggests microplastics can disrupt energy balance and population health in small invertebrates that play important roles in sandy beach ecosystems.
Ingestion of Nanoplastics and Microplastics by Pacific Oyster Larvae
Researchers tested whether Pacific oyster larvae could ingest nanoplastics and microplastics, and what effects this had on their development. They found that larvae consumed plastics as small as 100 nanometers, and exposure to the smallest particles significantly reduced larval growth and survival. The study highlights that the earliest life stages of commercially important shellfish may be especially vulnerable to nanoplastic pollution in coastal waters.
Physiological effects of plastic particles on mussels are mediated by food presence
Thick shell mussels exposed to polystyrene nanoplastics (70 nm) and microplastics (10 µm) with and without microalgae food found that food presence mediated the physiological effects — microplastics reduced energy budget and increased oxidative stress markers most strongly when food was mixed with particles.