Beeharry Marie Jessica, Duflos Guillaume, Dufossé Laurent
Chemistry and Biotechnology of Natural Products, CHEMBIOPRO, Université de La Réunion, 15 Avenue René Cassin, CS 92003, CEDEX 9, F-99744, Saint-Denis, France.
Laboratory for Food Safety, French Agency for Food, Environmental and Occupational Health & Safety (Anses), 62200, Boulogne-Sur-Mer, France.
Environ Monit Assess. 2025 Aug 12;197(9):1010. doi: 10.1007/s10661-025-14455-y.
Microplastics (MPs) are ubiquitous in our environment. Their appearance in natural habitats causes them to be mistaken for food by marine organisms, and ingested MPs are ultimately transferred along the food chain. This review aimed to analyse the current knowledge on MPs ingestion and trophic transfer in commercial pelagic species of the Indian Ocean (IO) which has the second-largest plastic load in the world. A total of 37 evidently reliable studies were included. The main results showed that the percentage of incidence in 70 species of commercially important pelagic and semi-pelagic fish in the Indian Ocean is 60%. The maximum average abundance of MPs reported was 57.1 ± 3.3 items/individual in the Hilsa shad (Hilsa Ilisha). Blue particles and fibres were the prevalent colour and shape (in 52% and 73% of the studies respectively) while particles measuring less than 500 µm were predominant in the majority of the studies (54%). Polyethylene was reported as being the most abundant polymer in 56% of studies which have reported polymer abundance. Gaps were identified in the geographical coverage of the IO for the study of MPs ingestion by commercial pelagic species, and studies investigating the relationship between trophic level and MPs ingestion are very scarce in the region. The findings of the individual studies on trophic transfer were contradictory, while the Trophic Magnification Factor (TMF) calculated in this review indicated that lower trophic levels ingested more MPs. Factors influencing trophic interactions should therefore be given careful attention and focus in future research to better understand the risk for human health.
微塑料在我们的环境中无处不在。它们出现在自然栖息地会导致海洋生物将其误认为食物，而被摄入的微塑料最终会沿着食物链转移。本综述旨在分析关于印度洋商业中上层鱼类摄入微塑料及营养级转移的现有知识，印度洋是世界上塑料负荷第二大的海域。总共纳入了37项明显可靠的研究。主要结果表明，印度洋70种具有商业重要性的中上层和半中上层鱼类的微塑料摄入发生率为60%。报告的微塑料最大平均丰度在印度鲥（Hilsa Ilisha）中为57.1±3.3个/个体。蓝色颗粒和纤维分别是最常见的颜色和形状（分别在52%和73%的研究中），而在大多数研究（54%）中，小于500微米的颗粒占主导。在56%报告了聚合物丰度的研究中，聚乙烯被报告为最丰富的聚合物。在印度洋商业中上层物种微塑料摄入研究的地理覆盖范围方面存在空白，并且该地区研究营养级与微塑料摄入之间关系的研究非常稀少。关于营养级转移的个别研究结果相互矛盾，而本综述中计算的营养放大因子（TMF）表明较低营养级摄入的微塑料更多。因此，在未来研究中应仔细关注和聚焦影响营养相互作用的因素，以更好地了解对人类健康的风险。
