Ecological, physiognomic and floristic investigation of the saline mountain area, Qom

Plant communities' organization is influenced by deterministic and stochastic processes so that, importance of them depends on various factors, such as type of ecosystem. Desert ecosystems are very fragile and delicate. Aim of this study is investigation on some ecological factors that affect on plant communities' mixture and determination of flora in saline mountain desert area in Qom. In this research 47 transects with 100 meters long were landed at a randomly systematic inventory method, in 1500 hectares ambit of area studied. Afterwards, plant species were collected and identified in order to determination of floristic situation, species ratio, number of individuals, vegetative coverage. Statistics parameters and sampling error percentage were presented using appropriate statistical formulas and tables. Results of gathering data are followings: 2.7 mean of species ratio in transect on region with less of 5% error, floristic study revealed 28 species belonging to 11 families. Family Chenopodiaceae showed the most number of species than others. According to area geomorphology and geology, low precipitation, soil factors, our results revealed low-rich plant communities in the area studied. The most prevalent vegetative life-forms were pertaining to Chamaephytes and Therophytes.