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A case study on microplastics pollution characteristics in fouling organisms in typical aquaculture bay, China
Summary
A survey of microplastics in fouling organisms living on aquaculture structures in a Chinese coastal bay found significant differences in microplastic abundance between species, with fibers and blue-colored particles being the most common type. One snail species (N. radula) was observed physically grasping microplastics with its feeding structure, suggesting active ingestion. These findings point to aquaculture as both a source of plastic pollution and an ecosystem where marine organisms are routinely exposed to contaminated particles.
Microplastics (MPs) and fouling organisms are prevalent in oceans worldwide. The study aims to investigate the pollution characteristics of MPs in fouling organisms. The study found significant inter-specific differences in the MPs abundance, while the length of MPs is consistent. The average number of MPs in N. exigua is 0.00 ± 0.00. There is a correlation between MPs abundance and weight in sessile group, while gastropods don't. Direct observation has demonstrated that the radulae of N. radula can envelop MPs. Fiber and blue are the predominant forms and colors of MPs found in fouling organisms. It is noteworthy that all film and fragment MPs observed were of a blue hue and had a size limitation of 500 μm. The characteristics of MPs between sessile organisms are more similar than those between gastropods. This study has improved our understanding of the pollution characteristics of MPs in fouling organisms, specifically gastropods.
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