Department of Biology Laboratory of Cellular Toxicology, University of Badji Mokhtar, BP 12, 23000, Annaba, Algeria.
Department of Biology, 8th May University 1945, 24000, Guelma, Algeria.
Environ Sci Pollut Res Int. 2020 Mar;27(8):8611-8620. doi: 10.1007/s11356-019-07459-y. Epub 2020 Jan 6.
Human activities have led to profound changes in aquatic environments and degradation at several levels. Preserving the quality of aquatic environments, their good functioning, and the species that are dependent on them has become a crucial element. In order to monitor the overall health of aquatic ecosystems, it is necessary to develop early indicators of environmental quality. In this work, we have tried to evaluate whether the analysis of morphological deformities affecting Chironomidae larvae could tell us about the state of degradation of water courses that are subjected to different discharges. To do this, water, sediment, and larvae of Chironomidae were sampled in dry weather in August-September of 2017 at three sites located in the North-East of Algeria. The heavy metals in the three compartments as well as the deformities affecting the mentum and mandibles of Chironomus were analyzed. The results showed a metal contamination especially in sediments; the highest values were found in Meboujda River and Seybouse River. The three sites have high deformities incidences, more than 33%, which suggests the presence of toxic stress. This study reflected the relationship between heavy metal concentrations in water, sediments, and deformities larval mouthparts (mentum and mandibles) in Chironomus. The use of deformities in Chironomus sp. can serve as an effective tool for bioassessment of freshwater ecosystems.
人类活动导致水生环境发生了深刻的变化和退化。保护水生态环境的质量、其良好的功能以及依赖于它们的物种已成为一个关键因素。为了监测水生生态系统的整体健康状况，有必要开发环境质量的早期指标。在这项工作中，我们试图评估分析影响摇蚊幼虫形态畸形是否可以说明受到不同排放影响的水道退化状况。为此，在 2017 年 8 月至 9 月干旱天气下，在阿尔及利亚东北部的三个地点采集了水、沉积物和摇蚊幼虫。分析了三个隔室中的重金属以及影响摇蚊下颚和下颚的畸形情况。结果表明，沉积物中存在金属污染，尤其是在梅布吉达河和塞布河。三个地点的畸形发生率都很高，超过 33%，这表明存在有毒压力。这项研究反映了水、沉积物和摇蚊幼虫口器（下颚和下颚）中重金属浓度之间的关系。在评估淡水生态系统时，使用摇蚊属中的畸形可以作为一种有效的生物评估工具。
