The categories, sources, and distribution of floating marine macro litter (FMML) in the offshore waters of the Bohai Sea and Yellow Sea (BYS) in the summer and autumn of 2021 and the spring of 2022 were investigated by visual ship transect surveys based on imaging video. The average FMML density of the BYS was estimated to be 26.09 ± 130.51 items/km2. From spring to autumn, the density of FMML significantly decreased, and the hotspot areas shifted from the southern Yellow Sea to the northern waters. The temporal and spatial distribution of FMML was influenced by runoff and coastal current transport. Plastic litter accounted for 97.80 % of all FMML types. Domestic litter accounted for 89.86 % of all FMML sources. This study systematically reports the category, source, and spatial distribution of FMML, and the results provide scientific basis for the treatment of marine litter in the BYS.

中文翻译：

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渤海和黄海近海漂浮海洋大型垃圾时空分布


通过基于成像视频的船舶样带调查，研究了 2021 年夏秋和 2022 年春渤海和黄海近海 （BYS） 近海漂浮海洋大型垃圾 （FMML） 的类别、来源和分布。BYS 的平均 FMML 密度估计为 26.09 ± 130.51 项/km2。春季—秋季，FMML 密度显著降低，热点区域由黄海南部向北部水域转移。FMML 的时空分布受径流和沿岸洋流输送的影响。塑料垃圾占所有 FMML 类型的 97.80 %。家养垃圾占所有 FMML 来源的 89.86 %。本研究系统报道了 FMML 的类别、来源和空间分布，结果为 BYS 中海洋垃圾的处理提供了科学依据。