The disappearance of submerged aquatic plants that once colonised the whole lake, has been the first step of this system’s degradation, followed by the erosion of emerging aquatic vegetation islands (shelter for many birds), a mud saturated basin, fish and other species reduction. This results in the survival of little demanding communities in detriment of the species in need of better preserved environments. L’Albufera of the 60’s is very far from the ecological status that we find nowadays.