Its main aim is promoting ecology and to give visibility to scientific works in all these fields. This congress was celebrated in an emblematic time and place due to the commemoration, this year , of the centenary of Professor Ramon Margalef. Margalef became one of the most relevant ecologist of the XX century and the first professor of Ecology in Spain at the University of Barcelona, where all the Iberian ecologist had the opportunity to meet. In this study, we presented the effects of different tree species white poplar, wild olive and stone pine on biotic and abiotic soil properties. After a remediation plan in the whole affected area, different tree and shrubs species were planted, and 15 years after these trees have generated soil changes.