海草床中沉积物中微塑料的丰度很高：波罗的海的案例研究。
Seagrass beds reveal high abundance of microplastic in sediments: A case study in the Baltic Sea.
机构信息
Department of Zoology, Institute of Ecology eand Earth Sciences, University of Tartu, Vanemuise 46, 51020 Tartu, Estonia; Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 5, 51014 Tartu, Estonia.
Department of Zoology, Institute of Ecology eand Earth Sciences, University of Tartu, Vanemuise 46, 51020 Tartu, Estonia.
出版信息
Mar Pollut Bull. 2021 Jul;168:112417. doi: 10.1016/j.marpolbul.2021.112417. Epub 2021 Apr 30.
Microplastic (MPL) contamination in the marine environment is extensively studied yet little is known about the extent of MPL abundance in seagrass beds. The aim of this study was to evaluate MPL accumulation in coastal seagrass (Zostera marina) beds in the Baltic Sea, Estonia. Surface water was sampled by pumping using 40 μm plankton net, and sediments by trowel. MPL was extracted with NaCl, identified by microscopy and ATR-FTIR on selected samples. Surface water in the seagrass beds had 0.04-1.2 (median 0.14) MPL/L, similar to other areas of the Baltic Sea. Sediments had 0-1817 (median 208) MPL/kg (dwt), much higher than previously recorded from adjacent unvegetated and offshore sediments, thereby suggesting a strong ability of the sediments in seagrass beds to retain MPL. Of identified MPL, blue fibres were dominant in both the sampled media. Sediment characterization showed a correlation between MPL counts with poorly sorted sediments.
海洋环境中的微塑料（MPL）污染已得到广泛研究，但关于其在海草床中的丰富程度却知之甚少。本研究旨在评估爱沙尼亚波罗的海沿海海草床（Zostera marina）中的 MPL 积累情况。通过使用 40μm 浮游生物网抽吸和用铲子采集沉积物的方式来采集表层水和底泥。使用 NaCl 提取 MPL，然后在选定的样品上通过显微镜和 ATR-FTIR 进行鉴定。海草床的表层水中 MPL 浓度为 0.04-1.2（中位数 0.14）MPL/L，与波罗的海其他地区的浓度相似。沉积物中 MPL 浓度为 0-1817（中位数 208）MPL/kg（干重），远高于相邻无植被和近海沉积物中的记录值，这表明海草床中的沉积物具有很强的 MPL 滞留能力。在所鉴定的 MPL 中，蓝色纤维在两种采样介质中均占主导地位。沉积物特征分析表明，MPL 计数与分选不良的沉积物之间存在相关性。
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