investigating the diversity of plant species around zarivar lake in marivan

zarivar lake is the only natural water area and the ponds in the kurdistan province which is located 2 kilometers far from the northwest of marivan city and at an altitude of 1285 meters above sea level. the mean annual rainfall is 997.6 mm and the mean annual temperature is 13°c. this study is carried out to survey the biodiversity, identification and introduce plant species around the lake and determination of biological forms and their chorology so that the result was identify 257 plant species belonging to 53 families and 183 genera. the vegetation spectrum indicates a dominant therophyte biological form with a coverage of 42 percent followed by hemicryptophyte %38.1, cryptophyte %16, phanerophyte %2.4 and chamephyte %1.5. the survey of geographic spectrum of studied area shows that most elements (99 species) belong to the vegetative area of iran and turan. in addition, according to iucn categories and book red data book of iran , three categories of plant species so called vulnerable , lower risk and data deficient in the studied area has been identified that shows 11 plant species are totally considered threatened species. further, the only carnivorous plant in iran (utricularia neglecta), have been identified in this study.