1. Department of Forestry and Range Management, University of Agriculture, Faisalabad 38000, Pakistan
2. Institute of Environmental Studies, University of Karachi, Karachi 75270, Pakistan
3. Bangor College China, A Joint Unit of Bangor University and Central South University of Forestry and Technology, Changsha 410004, China
4. Department of Mathematics and Statistics, University of Agriculture, Faisalabad 38000, Pakistan
5. Department of Botany, University of Karachi, Karachi 75270, Pakistan
6. College of Forestry, Central South University of Forestry and Technology, Changsha 410004, China