College of Marine Living Resource Sciences and Management, Shanghai Ocean University, Shanghai 201306, China; Atmosphere and Ocean Research Institute, The University of Tokyo, Chiba 277-8564, Japan.
College of Marine Living Resource Sciences and Management, Shanghai Ocean University, Shanghai 201306, China; Joint Laboratory for Monitoring and Conservation of Aquatic Living Resources In the Yangtze Estuary, Shanghai 200000, China.
J Hazard Mater. 2024 Dec 5;480:135896. doi: 10.1016/j.jhazmat.2024.135896. Epub 2024 Sep 27.
Recent studies on microplastics (MPs) in marine ecosystems have focused on their bioaccumulation and biomagnification within food chains, emphasizing their potential health risks to humans. However, these bio-effects of MPs in marine ecosystems remain a contentious issue. Employing the "consumer-dietary source" tracking function in stable isotope analysis can enhance our comprehension of how MPs magnify in organisms. In our research conducted in the coastal waters of Haizhou Bay, Jiangsu, China, we examined two commercially important fish species, Larimichthys polyactis and Collichthys lucidus, through stable isotope analysis to investigate the accumulation of MPs in their dietary sources. Results revealed fiber, blue, and PET as the primary shapes, colors, and polymers of MPs in the region. C. lucidus displayed a broader isotopic niche and a higher propensity for MP accumulation than L. polyactis. Biomagnification analysis indicated that dominant MP shapes, colors, and polymers were magnified in both fish species, with MPs smaller than 3 mm exhibiting substantial biomagnification. Factors such as feeding strategies and habitat preferences may influence MP ingestion by fish. We conclude that a high proportion of dietary sources in fish does not necessarily equate to a high concentration of MPs. Neglecting the proportion of dietary sources might lead to underestimating MP biomagnification. Therefore, a multidimensional approach to exploring the biomagnification of MPs is essential to accurately grasp this unique pollutant's impact.
最近对海洋生态系统中微塑料（MPs）的研究集中在它们在食物链中的生物积累和生物放大上，强调了它们对人类潜在的健康风险。然而，这些海洋生态系统中 MPs 的生物效应仍然是一个有争议的问题。在稳定同位素分析中使用“消费者-饮食来源”跟踪功能，可以增强我们对 MPs 在生物体中放大的理解。在我们在中国江苏海州湾沿海进行的研究中，我们通过稳定同位素分析研究了两种商业上重要的鱼类，黄鳍鲷和绿鳍马面鲀，以调查它们的饮食来源中 MPs 的积累情况。结果表明，纤维、蓝色和 PET 是该地区 MPs 的主要形状、颜色和聚合物。与黄鳍鲷相比，绿鳍马面鲀表现出更广泛的同位素生态位和更高的 MPs 积累倾向。生物放大分析表明，主要的 MPs 形状、颜色和聚合物在这两种鱼类中都被放大了，而小于 3 毫米的 MPs 则表现出了显著的生物放大。摄食策略和栖息地偏好等因素可能会影响鱼类对 MPs 的摄取。我们得出结论，鱼类饮食来源中的高比例并不一定意味着 MPs 的高浓度。忽略饮食来源的比例可能会导致对 MPs 生物放大的低估。因此，采用多维方法来探索 MPs 的生物放大作用，对于准确把握这种独特污染物的影响是必要的。
