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(PM219) Environmental contamination on natural populations in estuaries of the Iberian Atlantic Coast: a biomarkers approach.
Quintaneiro, C1, Monteiro, MS1, Nogueira, A1, Morgado, F1, Guilhermino, L2, 3, Soares, AMVM1, 1 Departamento de Biologia, Universidade de Aveiro, Aveiro, Portugal2 ICBAS, Dep. de Estudos de Populações, Lab. de Ecotoxicologia, Universidade do Porto, Porto, Portugal3 Centro Interdisciplinar de Investigação Marinha e Ambiental, Porto, Portugal
ABSTRACT- The estuarine ecosystems are highly valuable systems that provide economical, genetic and recreational resources that should be protected against the adverse effects of contaminants which are a consequence of anthropogenic activities. In the last years biomarkers have been widely used for the assessment of exposure and/or effects to environmental contaminants and constitute early warning signals of chemical exposure and/or effects. Juveniles of the estuarine fish Pomatoschistus microps and the shrimp Crangon crangon, epibenthic organisms with a wide geographical distribution and abundance, that inhabits estuaries and near-shore waters which are potentially contaminated waters were collected from autumn 2001 to summer 2002 in five stations along the Iberian Atlantic coast, in reference sites and in areas receiving urban, industrial and/or agricultural effluents. The activity of the enzymes acetylcholinesterase (AChE), lactate deshydrogenase (LDH) and glutathione S-transferases (GST) for the two species and 7-ethoxyresorufin O-deethylase (EROD) for P. microps were used as environmental biomarkers. A Redundancy Analysis was applied to data. The results indicated that the battery of biomarkers used in this study seems to be a useful tool to distinguish different types of contamination in estuarine systems, and that P. microps and C. crangon are suitable species to be used as bioindicator of environmental pollution.
This work was funded through a research grant from the Portuguese Foundation for Science & Technology (FCT/PDCTM/C/MAR/15266/1999 CONTROL and FCT/POCTI/BSE/46225/2002 RISKA) and by EU (FEDER program); Aveiro University supported the fellowships of Marta Monteiro (TCF/P-RP Reitoria) and FCT supported the fellowships of Carla Quintaneiro (FCT/SFRH/BM/8579/2002).
Key words: Natural populations, Environmental contamination, Biomarkers, Iberian Atlantic Coast
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