Ecological effects of forest roads on biodiversity and floristic composition (case study; leeresar, galanderood, makarood)

Current research includes the effects of forest roads on changes of plant covering and structure of plant species from forest roads edges towards its inner parts in three areas and two different asphalt and dirt roads. There are the same conditions according to topography، slope and direction for studied areas. On the two sides of road، it was used 2m × 2m micro plots for measuring of biodiversity and floristic composition. The results showed that biodiversity indices had no significantly differences in relation to studied regions، roads around and roads type. But، the road positions were effective on biodiversity amounts، as indices values were reduced with distance increasing of roads for both of paved unpaved roads. Some of light–demanding species such as Alnus glutinosa (L) Gaertn، Sambucus ebulus L. Rubus hyrcanus juz were more visible in the around of roads.