1. Laboratory of Plant Ecology, Department of Plants and Crops, Faculty of Bioscience Engineering Ghent University Coupure Links 653 B‐9000 Ghent Belgium
2. Departamento de Sistemas y Recursos Naturales, ETSI Montes, Forestal y del Medio Natural Universidad Politécnica de Madrid 28040 Madrid Spain
3. Department of Plants and Crops, Faculty of Bioscience Engineering Ghent University Coupure Links 653 B‐9000 Ghent Belgium