Resumen

The conditions in which the Pestige oil spill (November, 2002) took place, caused a coastal pollution up to tidal levels reached only very few times per year. This circumstance made necessary to apply to the rocks, after the manual or mechanical collection procedures were no longer useful, cleaning methods with presurized water and, in difficult accessible areas, bioremediation treatments. To verify the efficiency of different bioremediation approaches, a comparative assay of several formulations was started in March 2003 on a highly affected rocky area of Sálvora island (National Park of the Atlantic Islands, Galicia, Northwest Spain). In this work the results of the more effective procedures are presented, and some general aspects of the bioremediation on rocky substrates are discussed.