Coastal marine systems are the most sensitive zones to emerging pollutants. The present study aims to investigate the effect of Diuron on the meiofaunal assemblages, collected from the Bizerte channel (Tunisia). Microcosm experiments were set up using four increasing Diuron concentrations [D1 (10 ng g⁻¹ dry weight (DW)), D2 (50 ng g⁻¹ DW), D3 (250 ng g⁻¹ DW) and (1250 ng g⁻¹ DW)] compared to non-contaminated sediments (controls) and all plots were incubated for 30 days. Our results show that Diuron-supplemented sediments provoked the significant decrease of meiofaunal abundance as well as a change in nematodes' diversity and structure composition. All univariate indices, as well as the cumulative k-dominance, were lower in the Diuron than the control plot. Additionally, the ordination of treatments according to the two-dimensional nMDS plots analysis showed a clear structural separation of the Diuron treated replicates from the controls based on the functional groups lists. These current data emphasize the utility of the use of biological traits in the detection of disturbances in the aquatic biotope.

沿海海洋系统是对新兴污染物最敏感的区域。本研究旨在调查敌草隆对从比塞大海峡（突尼斯）收集的小型动物群落的影响。使用四种增加的敌草隆浓度 [D1 (10 ng g ^-1干重 (DW))、D2 (50 ng g ^-1 DW)、D3 (250 ng g ^-1 DW) 和 (1250 ng g ^{- 1} DW)] 与未受污染的沉积物（对照）相比，所有地块都培养了 30 天。我们的结果表明，添加敌草隆的沉积物引起了小型动物群丰度的显着下降以及线虫多样性和结构组成的变化。所有单变量指数，以及累积k-优势，在 Diuron 中低于对照图。此外，根据二维 nMDS 图分析的处理顺序显示，根据功能组列表，Diuron 处理的重复与对照有明显的结构分离。这些当前的数据强调了使用生物特征检测水生生物群落干扰的效用。