We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
FromSpat to Adult: Investigating Microplastic Accumulationin Crassostrea hongkongensis of VaryingSizes
AI summary Read the abstract
This study examined microplastic accumulation in oysters from spat to adult size over three months of field exposure, finding that larger adult oysters accumulated more MPs overall but that accumulation varied with exposure duration and depuration capacity across size classes.
Although bivalves are widely recognized as indicators of microplastic pollution, evidence of bioaccumulation shows high variability across studies due to exposure duration and depuration rates. This study examined microplastic ingestion in wild oysters of varying sizes (spat to adult) over three months in the Maowei Sea, a mariculture bay in China. Results revealed a positive correlation between oyster size and microplastic ingestion per individual, with larger oysters accumulating more microplastics, primarily in the visceral mass and mantle compared with the gills. However, when normalized by tissue mass, smaller oysters exhibited markedly higher burdens. Specifically, microplastic counts increased by ∼0.53 particles per individual per 1 cm increase in shell length, while the concentration decreased by ∼0.48 particles per gram of tissue per 1 cm increase. This inverse relationship highlights that size is a critical factor influencing the microplastic exposure risk per unit biomass. Additionally, a negative correlation between catalase (CAT) enzyme activity and microplastic exposure over two months provided field-based evidence of oxidative stress. To our knowledge, this study provides the first evidence of a size-dependent pattern in microplastic accumulation among wild oysters from spat to adult; notably, this effect manifests only across broad developmental stages rather than within shorter time scales.
More Papers Like This
From Spat to Adult: Investigating Microplastic Accumulation in Crassostrea hongkongensis of Varying Sizes
AI summary Read the abstract
Researchers tracked microplastic accumulation in wild oysters of different sizes over three months in a Chinese mariculture bay. They found that while larger oysters accumulated more total microplastics, smaller oysters had significantly higher concentrations per gram of body tissue. The study also found evidence of oxidative stress linked to microplastic exposure, providing the first field-based evidence of a size-dependent pattern in how wild oysters accumulate plastic particles from spat to adult.
Spatiotemporal dynamics of microplastic accumulation and biodeposition mediated by the Pacific oyster (Crassostrea gigas) in coastal aquaculture
AI summary Read the abstract
Researchers tracked microplastics in farmed Pacific oysters and found that as the oysters grew bigger, the plastic particles inside them became more diluted relative to their body weight, even though total plastic amounts kept rising. The oysters also acted like tiny filters, pulling microplastics out of the water and depositing them into the seafloor sediment below the farm. For consumers, this suggests that oyster size and harvest timing could affect how much microplastic ends up on your plate, though more research is needed to understand the full health implications.
Accumulation and Depuration of Microplastics by Oysters Upon the Laboratory Conditions
AI summary Read the abstract
Researchers monitored microplastic accumulation and elimination in oysters over 30 days, finding that the digestive tract accumulated the highest concentrations (bioaccumulation factors increasing from ~10 to ~41 over 10 days), and that most particles were eliminated within 30 days of depuration.
Out of sight but not out of mind: Size fractionation of plastics bioaccumulated by field deployed oysters
AI summary Read the abstract
Field-deployed oysters accumulated plastic particles below 1 micrometer in size, a size fraction largely ignored in prior studies, suggesting that existing monitoring of microplastics in filter feeders substantially underestimates total plastic body burden.
Microplastic accumulation, depuration dynamics and localization in environmental compartments: combination of experimental set ups and field studies
AI summary Read the abstract
Researchers used microcosm experiments to track microplastic accumulation, depuration, and tissue localization in marine organisms under environmentally relevant conditions. The study found that organisms can accumulate and partially depurate microplastics, with particle retention varying by tissue type and particle size.
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.