1. Department of Forestry, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, Guilan, Iran
2. Department of Forestry, Sari Agricultural Sciences and Natural Resources University, Sari, Mazandaran, Iran
3. Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University, Sari, Mazandaran, Iran
4. Department of Agricultural, Food, Environmental and Forestry Science and Technology, University of Florence, Florence, Italy
5. Department of Forest Ecology and Management, The Swedish University of Agricultural Sciences (SLU), Umea, Sweden