Natural communities
When I studied the subject of ecology at the University of Barcelona, about the years 1964-65 (fifty years ago!), Margalef was our teacher. Even though he was still not a university professor but the director of the Fisheries Research Institute of the CSIC (now Institute of Marine Sciences) where he concentrated his research. The ecology classes were at the building of the University Square, the practices at the Institute. There was by then only a book on ecology, by G.L.