Investigating the Distribution of Genetic Resources of Forest Trees and Shrubs in Alborz Province

Forests are the most important genetic reserves in the world and are considered to be the main sources of water and soil, which, in order to play their role, requires a biodiversity factor. Alborz province has an appropriate species diversity due to the special climatic conditions, diversity of topography, and a large part of its area located in the folds of Alborz Mountains. In this regard, studying its tree and shrub genetic reserves is very important. The present study was conducted in two phases of justification and detailed. In the first stage, information about tree species and shrubs in Alborz province and their districts were obtained based on valid sources. Then, the Landsat 8 satellite image (2014) was prepared for Alborz Province. After calculating the vegetation index and writing the minimum-maximum functions, fields with trees and shrubs were separated from the empty areas. Entering the arena began with recording geographic location, identifying tree species and shrub species and developing distribution maps. The results showed that in less than 3 percent of the province Rosaceae families with 49.12 percent, Cupressaceae with 24.56, Berberidaceae with 12.28, Elaeagnaceae with 5.26, Betulaceae with 3.5, Aceraceae with 1.75, Leguminosae with 1.75 and Rhamnaceae with 1.75 percent, respectively, in terms of species form tree and shrub cover.