Ben-Haddad Mohamed, Abelouah Mohamed Rida, Hajji Sara, De-la-Torre Gabriel E, Oualid Hicham Abou, Rangel-Buitrago Nelson, Ait Alla Aicha
Laboratory of Aquatic Systems: Marine and Continental Environments, Faculty of Sciences, Ibn Zohr University, Agadir, Morocco.
Laboratory of Aquatic Systems: Marine and Continental Environments, Faculty of Sciences, Ibn Zohr University, Agadir, Morocco.
Mar Pollut Bull. 2022 May;178:113607. doi: 10.1016/j.marpolbul.2022.113607. Epub 2022 Mar 31.
This study describes the use of D. trunculus as a bioindicator of microplastic (MPs) pollution due to beach urbanization related to the development of the Taghazout Bay tourist resort in Morocco. In six sites located on the coast, MPs densities ranged from 1.75 to 5.93 items per gram of D. trunculus wet weight. MPs contamination was significantly influenced spatiotemporally by the urbanization degree in the area. The shapes found were fibers (90.5%) and fragments (9.5%). The Fourier Transform Infrared Spectroscopy (FTIR) analysis reported two polymers: polyethylene (65%) and polypropylene (35%). MPs colors were dark and light, with a predominance of light blue (23.8%). The species ingested different sizes of MPs, mainly the 0.1 and 0.5 mm fractions. Scanning Electron Microscope coupled with an energy dispersive X-ray analyzer (SEM/EDX) revealed weathered MPs with chemical elements adhered to their surface (Cu, Fe, Mg, S, Cl, etc.). The results of this study recommend the use of D. trunculus as a new bioindicator of MPs pollution following an urban change in the coastal scenery. Also, a sustainable coastal management must be implemented in the study area.
本研究描述了由于摩洛哥塔加佐特湾旅游度假区开发导致海滩城市化，利用截顶菱形藻作为微塑料（MPs）污染的生物指示物。在位于海岸的六个地点，每克截顶菱形藻湿重的MPs密度范围为1.75至5.93个。该区域的城市化程度对MPs污染有显著的时空影响。发现的形状为纤维（90.5%）和碎片（9.5%）。傅里叶变换红外光谱（FTIR）分析报告了两种聚合物：聚乙烯（65%）和聚丙烯（35%）。MPs的颜色有深色和浅色，其中浅蓝色占主导（23.8%）。该物种摄入了不同大小的MPs，主要是0.1毫米和0.5毫米的部分。扫描电子显微镜与能量色散X射线分析仪（SEM/EDX）联用显示，MPs表面附着有化学元素（铜、铁、镁、硫、氯等），已发生风化。本研究结果建议，在沿海景观发生城市变化后，利用截顶菱形藻作为MPs污染的新型生物指示物。此外，研究区域必须实施可持续的海岸管理。
