Evaluation of biodiversity, life form and chorology in ecological groups of Dena conserved area forests

Study on different parameters of vegetation, especially, on ecological groups can help us to understand environmental factors affecting it. In order to studying of biodiversity, life forms and chorology in different ecological groups in protected area of western Dena forests with 600 ha area were done. Then 50 plots of 450 m2 with dimensions 15×30 meters were established by random-systematic method. TWINSPAN analysis results showed that there were four ecological groups, Smyrnieto-Schumanniatum (first group), Phlometum olivieri (second group), Prangoetum ferula (third group) and Junipereto – Ferulagatum (fourth group) in this area from low to high altitudes, respectively. Different parameters of alpha biodiversity between groups were not significant, although richness value of fourth group was lowest. Beta biodiversity results showed that first group and fourth groups had highest and lowest amount. Also results of life form showed that the first and second groups had higher amount of Therophyt, but phanerophyt species of third and fourth groups were higher than other two groups. On the other hand, fourth ecological groups had the lowest Irano- touranian chorotype and the highest Irano- touranian and Euro-Siberian chorotype. In addition, results showed that first group should be conserved in aspect of plant diversity. Also climate of this group is drier than other ecological groups.