Determination of species habitat Agropyron trichophorum using GIS and multivariate analysis in West region of Isfahan

The Establishment of vegetation during time and in different places demonstrates the contrast between vegetation species and environmental factors. Agropyron trichophorum species is in one of the valuable meadows in Fereidan Isfahan which is because of uncontrolled exploitation is being destructed. In this study the relationships between species (Agropyron trichophorum) in some parts of the grassland areas of Isfahan Fereidan were investigated with environmental factors, and the most important habitat characteristics were determined. In this study, nine different ecological conditions of rangeland (good to poor condition) was performed and the index of canopy cover and most important biological sites were determined. The geographical information system (GIS) was used for detemining the physiographic and climatic factors. The row classification and canonical correspondence analysis (CCA) was applied for investigating the relationship between canopy cover for the desired species and biological factors. Results showed that soil depth factors, respectively, N, clay, sand, pH, lime rate, slope and absolute minimum temperatures are the important factors affecting the development and deployment Agropyron trichophorum species.