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Effects of chronic exposure to sediments from the Zarzis area, Gulf of Gabes, measured in the mussel (Mytilus spp.): a multi-biomarker approach involving oxidative stress and neurotoxicity
Soil & Sediment Contamination ( IF 2 ) Pub Date : 2020-06-08 , DOI: 10.1080/15320383.2020.1771275
Rayda Ghribi 1, 2, 3 , Alberto Teodorico Correia 2, 4 , Boubaker Elleuch 1 , Bruno Nunes 3, 5
Affiliation  

The hereby study was conducted to assess the chronic biological effects of potentially contaminated sediments collected at the Zarzis area, Tunisia, on the marine mussel species (Mytilus spp.). Useful information can be provided through the analysis of biomarkers that allow inferring about the presence of pollutants and their adverse effects, contributing for a better assessment of ecosystems' quality and functions. Three sampling sites were chosen taking into account the putative impact of different human activities at several sites located in Zarzis area, compared to an unpolluted reference site, located in Afurada, Vila Nova de Gaia, Portugal. Physical-chemical characterization involved the survey of metals (Cd, Cu, Cr, Hg, Zn and Pb) and polycyclic aromatic hydrocarbons (PAHs), whose toxic effects are involved in the onset of oxidative stress. Biomarkers involving oxidative stress and neurotoxicity were quantified in hemolymph, gills, and digestive gland tissues of Mytilus spp. following the chronic exposure to the distinct sediments. Organisms exposed to sediments collected at the Zarzis area presented the highest values of the tested oxidative stress biomarkers and a significant inhibition of AChE activity in comparison with the unpolluted reference site. This set of results suggests that biomarker responses representing different biological endpoints in Mytilus spp. are useful for the assessment of environmental pollution effects, namely by PAHs and metals. Our results suggest the presence of these chemicals in specific sampling sites whose sediment caused evident biological responses in mussels.



中文翻译:

贻贝(Mytilus spp。)中测量的慢性暴露于加贝斯湾Zarzis地区沉积物的影响:一种涉及氧化应激和神经毒性的多生物标志物方法

特此进行研究,以评估在突尼斯Zarzis地区收集的潜在污染沉积物对海洋贻贝物种(Mytilusspp。)。通过对生物标志物的分析,可以提供有用的信息,从而可以推断出污染物的存在及其不利影响,有助于更好地评估生态系统的质量和功能。考虑到位于扎尔齐斯地区几个地点的不同人类活动的假定影响,与位于葡萄牙盖亚维拉新城的无污染参考地点相比,选择了三个采样地点。物理化学特征涉及对金属(镉,铜,铬,汞,锌和铅)和多环芳烃(PAHs)的调查,其毒性作用与氧化应激的发生有关。在Mytilus的血淋巴,腮和消化腺组织中定量了涉及氧化应激和神经毒性的生物标志物spp。长期暴露于不同的沉积物之后。与未污染的参考位点相比,暴露于Zarzis地区收集的沉积物的生物呈现出最高的测试氧化应激生物标记值,并显着抑制AChE活性。这组结果表明,生物标志物反应代表了Mytilus spp中的不同生物学终点。可用于评估环境污染影响,即多环芳烃和金属的影响。我们的结果表明,这些化学物质存在于特定的采样点,其沉积物引起贻贝明显的生物学反应。

更新日期:2020-07-27
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