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首页> 外文期刊>Environmental Science & Technology >Underestimated Microplastic Pollution Derived from Fishery Activities and 'Hidden' in Deep Sediment
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Underestimated Microplastic Pollution Derived from Fishery Activities and 'Hidden' in Deep Sediment

机译：渔业活动和深部沉积物“隐藏”引起的低估了微塑性污染

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Fishery activities are an important source of microplastic pollution in coastal areas but have received little attention. The Beibu Gulf, a traditional fishing ground of China and the China-Indo Peninsula, was selected in this study, and the focus was on the impacts of fishery activities on the horizontal distribution of microplastics in sediment. The results showed that the dominant contaminants (polypropylene fibers and polyethylene fibers) might originate from the abrasion of fishing gear and contributed to 61.6% of the total abundance of microplastics in surface sediment. The abundance of polypropylene fibers and polyethylene fibers exhibited a strong correlation (R~2= 0.8586,p = 0.015) with values of fishery yields of different districts, which highlighted the effects of different fishery activities on microplastic contamination in marine sediment. Microplastics could be "hidden" in deep sediment to a depth of 60 cm. The estimated storage of microplastics in deep sediment (185 tons) was 5 times that in surface sediment. The assessment of microplastic storage woridwide might be underestimated because most previous studies only examined surface sediment. The abundance distribution and size distribution of microplastics in the sediment core suggested long-term burial of microplastics in deep sediment. Bioturbation might be responsible for the vertical transport of microplastics, leading to "fresh microplastics" preservation in "old sediment".
机译：渔业活动是沿海地区微生物污染的重要来源，但很少受到关注。本研究选择了北部湾作为中国的传统渔场和中印半岛，其重点是渔业活动对沉积物中微塑料水平分布的影响。结果表明，主要污染物（聚丙烯纤维和聚乙烯纤维）可能来自渔具的磨损，占表层沉积物中微塑料总量的61.6％。聚丙烯纤维和聚乙烯纤维的丰度与不同地区的渔业产量值具有很强的相关性（R〜2 = 0.8586，p = 0.015），这突出表明了不同渔业活动对海洋沉积物中微塑性污染的影响。可以将微塑料“隐藏”在深度为60厘米的深层沉积物中。估计深层沉积物（185吨）中的微塑料储存量是表层沉积物的5倍。由于先前的大多数研究仅检查了表层沉积物，因此对整个地方的微塑料存储的评估可能被低估了。沉积物核心中微塑料的丰度分布和尺寸分布表明，深部沉积物中的微塑料可长期埋葬。生物扰动可能是造成微塑料垂直输送的原因，导致“新鲜的微塑料”保存在“旧沉积物中”。

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