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Mots-clés	Contamination gradient

Porteur	Session	Titre	Mots-clés	Résumé	OHM(s)
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Ruth Pereira	2016	INV-AVEIRO - The influence of contamination in the metabolic activity of INVertebrates from Ria de AVEIRO	Sediments Ria de Aveiro Contamination gradient Molecular biomarkers of oxidative stress Molecular biomarkers of neurologic activity Industry	During decades effluents from the Estarreja Chemical Complex were directly discharged in the Ria de Aveiro lagoon through a system of ditches. “Esteiro de Estarreja” was the main channel receiving effluents rich in aromatic based and chlorine compounds and in toxic elements such as As, Hg, Pb and Zn. Consequently, most of the discharged contaminants are settled in the “Esteiro de Estarreja” channel, as well as in the inner basin where this channel discharges, the Laranjo Basin. Benthic organisms are in direct and permanent contact with sediments, and despite a decrease in surface sediment contamination, previous studies concluded that biota are still subject to bioaccumulation of contaminants such as PCBs, HCB, Hg, and As. In addition, it’s known that there is a gradient of contamination, with higher concentrations found in the channel, observed not only for sediments, but also for biota. This clearly provides an indication of areas with different levels.	OHM Estarreja	Afficher

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