University of Carthage, Faculty of Sciences of Bizerte, LR01ES14 Laboratory of Biomonitoring of the Environment, 7021, Zarzouna, Tunisia.
University of Carthage, Faculty of Sciences of Bizerte, LR01ES14 Laboratory of Biomonitoring of the Environment, 7021, Zarzouna, Tunisia.
Chemosphere. 2022 Jan;287(Pt 3):132262. doi: 10.1016/j.chemosphere.2021.132262. Epub 2021 Sep 17.
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 dry weight (DW)), D2 (50 ng g DW), D3 (250 ng g DW) and (1250 ng g 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来自比塞大海峡（突尼斯）的小型底栖动物群的影响。使用四种不同浓度的敌草隆 [D1（10 ng g 干重 (DW)）、D2（50 ng g DW）、D3（250 ng g DW）和（1250 ng g DW）] 进行微宇宙实验，与未受污染的沉积物（对照）进行比较，并将所有实验进行 30 天的培养。我们的结果表明，添加敌草隆的沉积物导致小型底栖动物丰度显著下降，线虫多样性和结构组成发生变化。与对照相比，所有单变量指数以及累积 k-优势度都较低。此外，根据二维 nMDS 图分析对处理进行排序，根据功能群列表，敌草隆处理的重复样本与对照样本之间存在明显的结构分离。这些当前数据强调了在水生生物栖息地的干扰检测中使用生物特征的效用。
