Professor in international and European environmental law. Ghent University

Professor in Ecology at the University of Naples Federico II and Research Fellow at the Anton Dohrn Zoological Station of Naples

Dr., Hab. (Ecology and Soil science), leading researcher of the Institute of Physicochemical and Biological Problems in Soil Science. Russian Academy of Sciences

Distinguished researcher and full professor in dryland ecology. University of Alicante

University of York

ICREA Professor and specialist in complex systems and ecological theory. Universitat Pompeu Fabra

Executive Director, SER

Director, Forestry Division. FAO