Leader: Pereira Ruth
Coauthor(s): Pedro Pato, Armando da Costa Duarte, Joana Lourenço, Sonia Mendo, Anabela Cachada
Disciplines
Biologie
Chimie
Ecologie
Keywords
Sediments Ria de Aveiro
Contamination gradient
Molecular biomarkers of oxidative stress
Molecular biomarkers of neurologic activity
Industry
Abstract
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.
Participants
Pato Pedro, Duarte Armando da Costa , Lourenço Joana Isabel do Vale , Mendo Sónia Alexandra Leite Velho , Cachada Anabela
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