Affiliation: | Division of Forest, Nature and Landscape Research, Katholieke Universiteit Leuven, Celestijnenlaan 200E, 3001 Leuven, Belgium;;Laboratory of Forestry, Ghent University, Geraardsbergse Steenweg 267, 9090 Gontrode, Belgium;and;Department of Botany, University of Picardie Jules Verne 1, rue des Louvels, F-80037 Amiens Cedex 1, France |