Determination of potential habitats of Saxaoul species for Sistan region using GIS

Growth of plants species in an area is affected by biological and environmental factors ofthat region. It is necessary to study some ecological requirements of species and alsoenvironmental characteristics of the study area in order to determine site potential and plant growth needs. this study performed to determine potential habitat of Haloxylon persicum and Haloxylon aphyllum in Sistan province by using Geographic Information System (GIS) technique. In this way sampling from habitats carried out for recognition of ecological requirements. Also thematic maps of area provided and digitized for attainment data layers which were needed. Then various sections of area were investigated and were compared with ecological requirements of these two species. Finally, the different layers of information were put together for every species. Base on our results, 3.18% and 3.52% of the studied area was suitable for growing H. persicum and H. aphyllum respectively. Assessment of accuracy of model was 93.3%.