Muhammad Farooq1 Waleed Anjum1 Khalid Rasheed Khan Abbas Hussain Shah Ghulam Mujtaba Shah Manzoor Hussain Azhar Mehmood Botany Department, Government Post Graduate College, Mansehra, Pakistan Botany Department, Hazara University, Mansehra, Pakistan Botany Department, GPGC Mmandian Abbottabad, Pakistan Proceedings of the International Academy of Ecology and Environmental Sciences ISSN 2220-8860 http://www.iaees.org/publications/journals/piaees/online-version.asp 2019 9 4 127 136 International Academy of Ecology and Environmental Sciences Hong Kong 30 July 2019 5 September 2019 1 December 2019 tree communities TWINSPAN forests Upper Tanawal The present study is the first comprehensive investigation of forest communities of 127 stands in Upper Tanawal forests by quadrat method. Based on phytosociological analysis, the composition and distribution of tree species were described quantitatively on the basis of their IVI values using TWINSPAN classification. With the help of IVI values of tree species from 127 sampling station, TWINSPAN classified 20 tree communities. The occurrence of huge numbers of tree communities is due to restriction of single plant habit. Our investigation revealed that the diversity of trees species in this region decreases with increase in the elevation. Pinus wallichiana were observed the most dominant tree species at higher altitudinal areas. From 2 sampling sites, i.e. 2200 m and 2300 m of altitudes, pure coniferous community of Taxus-Abies-Pinus wallichiana was documented with only these three tree species. It was observed that the tree species like Picea smithiana, Abies pindrow, Rhododendron arboretum, Cedrus deodara, Taxus baccata and Quercus spp were rare in study area. All the tree communities as well as their associated biodiversity should be conserved and protected to ensure the future existence of these forest lands. http://www.iaees.org/publications/journals/piaees/articles/2019-9(4)/pioneer-community-level-syntaxonomy-of-forests.pdf