ECOLOGIA BALKANICA 2017, Vol. 9, Issue 1 June 2017 pp. 1-9 A Floristic Study of Hamun Lake Basin, South East of Iran Maryam Keshavarzi1*, Habibollah Ijbari2, Samaneh Mosaferi1,3, Farzaneh Ebrahimi1 1 - Alzahra University, Faculty of Biological Sciences, Plant Sciences Department, Tehran, IRAN 2 - University of Zabol, Faculty of Science, Department of Biology, Zabol, IRAN 3 - Shahid Beheshti University, Faculty of Biological Sciences, Department of Biology, Tehran, IRAN * Corresponding author:
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[email protected] Abstract. Lake Hamun is the largest freshwater resource in Iran with area of about 3820 km2. The present study aims to evaluate the floristic elements of the studied site. Plant samples were gathered from nature, from March to July at the growing season. Life form and chorotype of plants in Lake Hamun basin were investigated. Totally 128 plant species belonging to 80 genera and 30 families were identified. Families as Poaceae, Amaranthaceae and Fabaceae were the most dominant and frequent families. Considering biological types revealed that the most frequent forms were therophytes (61%) and hemicryptophytes (17%). Floristic elements of the area were mainly Irano- touranian mixed with Saharo-Arabian and Sindu-Sudanian types, although multi- and bi- regional elements were also frequent. As the lake has recently become an international conserved area, the complete biological and ecological study of the site is a necessity. Key words: Hamun Lake, Sistan and Baluchestan, Iran. Introduction Basin with area of approximately 310,000 km2 is Iran is a country in the south-west of Asia limited at the East by Iranian highlands, at the with 1.648 million km2 area.