Kobayashi Tsunefumi, Yagi Mitsuharu, Kawaguchi Toshiya, Hata Toshiro, Shimizu Kenichi
Department of Fisheries Science, Graduate School of Fisheries and Environmental Sciences, Nagasaki University, 8528521 Bunkyo, Nagasaki, Japan.
Department of Fisheries Science, Graduate School of Fisheries and Environmental Sciences, Nagasaki University, 8528521 Bunkyo, Nagasaki, Japan; Institute of Integrated Science and Technology, Nagasaki University, 8528521 Bunkyo, Nagasaki, Japan.
Mar Pollut Bull. 2021 Aug;169:112563. doi: 10.1016/j.marpolbul.2021.112563. Epub 2021 Jun 2.
Microplastics in the ocean are threatening marine ecosystems. Although plastic contaminants are ubiquitous, their distribution is thought to be heterogeneous. Here, we elucidate the spatial and temporal variations in the quanti-qualitative characteristics of microplastics near Kyushu, Japan in the East China Sea. Six surveys across nine stations were conducted over a 14-month period, and a total of 6131 plastic items were identified. The average microplastic abundance and size were 0.49 ± 0.92 (items·m ± S.D.), and 1.71 ± 0.93 (mm ± S.D.), respectively. Differences between the highest and lowest abundances were 50-fold among monthly means, and 550-fold across all net tows. With respect to colour, polymer type, and shape, white and transparent polyethylene fragments were the dominant composition. There were significant differences for each of the analytical microplastic parameters among the survey months. Our results provide baseline data and lead to a more comprehensive understanding of the spatiotemporal characteristics of microplastic pollution.
海洋中的微塑料正威胁着海洋生态系统。尽管塑料污染物无处不在，但人们认为它们的分布是不均匀的。在这里，我们阐明了中国东海日本九州附近微塑料的定量-定性特征的时空变化。在14个月的时间里，对9个站点进行了6次调查，共识别出6131个塑料物品。微塑料的平均丰度和尺寸分别为0.49±0.92（个·米±标准差）和1.71±0.93（毫米±标准差）。月均值中最高丰度与最低丰度之间的差异为50倍，所有网拖样品中的差异为550倍。在颜色、聚合物类型和形状方面，白色和透明的聚乙烯碎片是主要成分。各调查月份的微塑料分析参数均存在显著差异。我们的结果提供了基线数据，并有助于更全面地了解微塑料污染的时空特征。
