• Honorary Doctor (Doctor Honoris Causa) Université d’Orléans, 2012
  • Honorary Doctor (Doctor Honoris Causa) Mendel University, 2010
  • Member of the Royal Flemish Academy of Belgium for Science and the Arts (since 2009)
  • Corresponding Member of the Slovenian Academy of Sciences and Arts (since 2015)
  • Titular of the Belgian Francqui Chair at the Université Catholique de Louvain (UCL), academic year 2006-2007. The Belgian Francqui Chair is a prestigious award, recognized as one of the highest scientific Belgian awards encouraging outstanding scientists to promote teaching and scientific research in another Belgian university.
  • Promoter of Honorary Doctorate Degree (Doctor Honoris Causa) of Prof. G.D. Farquhar (Canberra, Australia) at the University of Antwerp, 2006
  • Scientific Achievement Award of the International Union of Forestry Research Organisations (IUFRO), 1990
  • Fulbright‑Hays Grantee, University of Washington, USA, 1987‑1988