Søren Nors Nielsen obtained the PhD in Structurally Dynamic Modelling in 1992, in the University of Copenhagen, and the "Agregação" in 2009, in the University of Coimbra. He is a world expert on the application of thermodynamic methods for the analysis and assessment of biological systems functioning, mainly in aquatic environments, and of ecological modeling in environmental management. He authored or co-authored a large number of papers in peer review journals, book chapters and books.