1. Department of GeographyGhent University Krijgslaan 281 (S8) 9000 Ghent Belgium
2. Royal Museum for Central AfricaLaboratory for Wood Biology and Xylarium Leuvensesteenweg 13 3080 Tervuren Belgium
3. Department of Civil EngineeringMekelle University P.O. Box 231 Mekelle Ethiopia
4. Department of Land Resource and Environmental ProtectionMekelle University P.O. Box 231 Mekelle Ethiopia