Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China.
College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China.
J Hazard Mater. 2022 Feb 15;424(Pt D):127665. doi: 10.1016/j.jhazmat.2021.127665. Epub 2021 Nov 3.
Microplastics (MPs) are ubiquitous in freshwater ecosystems, including inland small waterbodies (e.g., ponds and ditches), which are unique habitats for tadpoles. The uptake of MPs by tadpoles is influenced by their habitat, life stage, and feeding strategy. In this study, we investigated MP levels in small waterbodies in three different functional zones from the Hangzhou Great Bay Area, China, and resident tadpoles at different stages of metamorphosis with different feeding habits. Our results indicated that MPs in all three sampling areas were predominantly fibers; and the highest abundances of MPs were observed in water (4.70 ± 2.30 items/L) and sediment (728 ± 324 items/kg) from a textile industrial area, likely the result of nearby human activities. There was no significant difference in MP number in tadpoles between areas; however, omnivorous tadpoles with labial teeth and horny beaks ingested more MPs than did filter feeders. Based on their developmental characteristics, the collected tadpoles were categorized as: pre-metamorphosis, pro-metamorphosis, and metamorphic climax. The MP levels exhibited an upward trend, and MP size gradually increased as tadpole development progressed. This suggests that MPs may accumulate in tadpoles as they grow and potentially affect their metamorphosis from larvae to frogs.
微塑料（MPs）广泛存在于淡水生态系统中，包括内陆小型水体（如池塘和沟渠），这些水体是蝌蚪的独特栖息地。蝌蚪对 MPs 的摄取受到其栖息地、生命阶段和摄食策略的影响。在这项研究中，我们调查了来自中国杭州大湾区三个不同功能区的小型水体中的 MPs 水平，以及处于不同变态阶段和具有不同摄食习惯的常驻蝌蚪。我们的结果表明，所有三个采样区域的 MPs 主要都是纤维；在纺织工业区的水（4.70±2.30 个/L）和沉积物（728±324 个/kg）中观察到 MPs 的丰度最高，这可能是附近人类活动的结果。不同区域的蝌蚪中 MPs 的数量没有显著差异；然而，具有唇齿和角质喙的杂食性蝌蚪比滤食性蝌蚪摄取更多的 MPs。根据它们的发育特征，收集的蝌蚪被分为：前变态期、前变态期和变态高峰期。随着蝌蚪的发育，MP 水平呈上升趋势，MP 尺寸逐渐增大。这表明 MPs 可能随着蝌蚪的生长而积累，并可能影响它们从幼虫到青蛙的变态。
