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Título

Integrated assessment of three ecosystems in the south coast of Portugal: Comparison between the clam Scrobicularia plana and the polychaete Nereis diversicolor

Autor Gomes, Tania; Pereira, C.; Rocha, T.; Rodríguez-Romero, Araceli ; Macías, Diego ; Trombini, Chiara ; Blasco, Julián ; Bebianno, Maria João
Fecha de publicación jul-2013
Citación IX Congreso Ibérico de Contaminación y Toxicología Ambiental (2013)
VI Congreso Iberoamericano de Contaminación y Toxicología Ambiental (2013)
ResumenAquatic environments in the south of Portugal are characterized by estuaries, lagoons and saltmarshes that have their environmental situation critically dependent on the impact of contaminants as consequence of mining activities, increase of population densities, agricultural and industrial activities. The evaluation of contaminant impacts on marine organisms and consequent coastal water quality is crucial and requires efficient analytical methodologies combined with new management tools. In order to assess environmental risk and deterioration in these ecosystems analytical tools were developed under the framework of Interreg IIIA project Rise to characterize and diagnostic the presence of contaminants. A biomonitoring survey was carried out in three different ecosystems (Arade river, Ria Formosa lagoon and Guadiana river) to assess the quality of water, sediment and biota (clams Scrobicularia plana and polychaetes Nereis diversicolor). This involved analyses of: a) water: abiotic parameters (temperature, salinity, pH, and dissolved oxygen); b) sediments: metals (Cd, Cu, Ni, Zn, Cr, Hg, As, Fe, Mn, Co, Li, Al and Pb); c) biota: condition index, metals (Cd, Cu, Ni, Zn, Cr, Fe, Mn, Co, Al, As and Pb), and a battery of biomarkers (lipid peroxidation, antioxidant enzymes (CAT, SOD and GPX), metallothionein and alkali-labile phosphates). Biological answers were integrated using the Integrated Biomarker Response (IBR) and compared with metal levels in sediments and organism tissues. The IBR applied in this biomonitoring survey allowed a discrimination of stress levels among sites and species related differences, and can be a useful tool in environmental quality assessment studies.
Descripción Trabajo presentado en el IX Congreso Ibérico y VI Iberoamericano de Contaminación y Toxicología Ambiental (CICTA), celebrado en Valencia del 1 al 4 de julio de 2013.
URI http://hdl.handle.net/10261/110141
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