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A comprehensive evaluation of microplastic pollution in the Xiangshan Bay of China with special reference to seasonal variation
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Researchers surveyed microplastic pollution in the semi-enclosed Xiangshan Bay in China across spring and summer seasons. The study found that microplastic abundance in surface water was significantly higher in summer than spring, with different pollution sources dominating each season — textile industry in spring and fishery production in summer — suggesting seasonal human activities strongly influence microplastic contamination patterns.
Marine microplastic (MP) pollution has drawn global attention due to its potential risk to ecosystem. In the present study, we investigated MP pollution in surface water and sediment of a semi-closed bay: the Xiangshan Bay in the East China Sea in spring and summer. The results showed that MP abundance in surface water increased significantly in summer than spring (0.233 and 0.036 item/m3, respectively), while MP abundance in sediment was relatively steady. Meanwhile, the smaller size MPs (diameter < 1000 μm) and land-input fragment-shaped and film-shaped PP and PE increased in surface water in summer compared to spring. Surface microstructure of MPs showed that there were more cracks on MPs in summer comparing to spring. Based on diversity index, MP pollution in the Xiangshan Bay was at a low level and the composition was relatively uncomplicated. The source tracing analysis indicated main contributor of MPs were different in two seasons: textile industry was the dominate source of MPs in spring while fishery production were the dominate source in summer. Our results indicate that the pollution source of MPs could be various in different seasons due to the different climate and human activities, and provide a reference in the prevention and control of MP pollution in semi-closed bay ecosystems.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.