Marine Biotechnology Division, ICAR-Central Marine Fisheries Research Institute, Ernakulam North P.O., Kochi, 682018, Kerala, India.
Marine Biotechnology Division, ICAR-Central Marine Fisheries Research Institute, Ernakulam North P.O., Kochi, 682018, Kerala, India.
Environ Pollut. 2022 Jul 15;305:119250. doi: 10.1016/j.envpol.2022.119250. Epub 2022 Apr 6.
Due to the ever-increasing production of plastic litter and its subsequent accumulation as microplastic in the environment, the pollution caused by microplastics is considered as a global menace, especially in the coastal ecosystem. Occurrence of microplastics in water and three commercially important bivalves, Viz. green mussel (Perna viridis), edible oyster (Magallana bilineata) and black clam (Villorita cyprinoides) from five different locations of southwest coast of India was studied. The highest abundance of microplastics was observed in water samples from Periyar River (163.67 items L). Among bivalves, the highest abundance of microplastics was observed in clams from Periyar River (digestive gland: 22.8 g; gill: 29.6 g), whereas the lowest abundance was observed in mussels sampled from Vembanad estuary (digestive gland: 5.6 g; gill: 8.5 g ). Fibers were the most prevalent type of microplastics found in bivalve tissues across each location. Microplastics less than 2 mm were the most prevalent based on size. Polypropylene and high-density polyethylene were the two types of microplastics observed based on the results of Raman spectroscopy. No relationship was observed between shell length, tissue weight and microplastic abundance. A strong positive correlation was observed between the microplastic presence in water and bivalve tissues. The usefulness of sedentary bivalves in assessing the aquatic pollution has been validated through this study.
由于塑料垃圾的产量不断增加，以及随后在环境中积累成为微塑料，微塑料污染被认为是一种全球性威胁，尤其是在沿海生态系统中。本研究调查了印度西南海岸五个不同地点的水中和三种商业上重要的双壳贝类（绿贻贝、牡蛎和黑蛤）中微塑料的存在情况。在 Periyar 河中采集的水样中观察到微塑料的丰度最高（163.67 个/L）。在双壳贝类中，Periyar 河中蛤类的微塑料丰度最高（消化腺：22.8 g；鳃：29.6 g），而在 Vembanad 河口采集的贻贝中微塑料丰度最低（消化腺：5.6 g；鳃：8.5 g）。在每个地点的双壳贝类组织中，纤维是最常见的微塑料类型。根据大小，小于 2 毫米的微塑料是最常见的。根据拉曼光谱的结果，观察到的微塑料类型有聚丙烯和高密度聚乙烯。壳长、组织重量和微塑料丰度之间没有观察到关系。水中微塑料的存在与双壳贝类组织之间存在很强的正相关关系。通过这项研究验证了静止双壳贝类在评估水生污染方面的有效性。
