Document Type : Original Article
Authors
1
Ph.D. Student, Department of Plant Sciences, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran
2
Professor, Department of Plant Sciences, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran
10.22108/tbj.2024.142561.1280
Abstract
Estand protected region, situated in the south of South Khorassan province, is the overlapping point of part of the flora of eastern Iran with western Afghanistan. The main characteristics of the region representing high biodiversity, next to the Lut desert, maximum height of 2111 meters, average annual rainfall of 102 mm and serving as a transitional zone between the Irano-Turanian (IT) and Saharo-Sindian (SS) regions. Samplings were taken randomly between 2019 and 2022 in an area of 101051 hectares. The flora, Life form and Chorology of the species were investigated In this study, 106 taxa belonging to 96 species, 78 genera and 30 families and Angiosperms, with 28 dicotyledonous families & one monocotyledon family and Gymnosperms, with one family were identified. The most important plant families & genera in terms of species richness were Asteraceae and Amaranthaceae (19) species, and Artemisia, Cousinia, Haloxylon & Suaeda genera each with 3 species. Chamaephytes and Therophytes were dominant life forms in the region with 28% and 26%, respectively. Among them, 21 Psammophytes, 6 Endemic species, 30 medicinal species and chorologically, most of the species belong to the Irano - Turanian (IT) (52%) region and the conservation status was determined by GeoCAT online software. 13 (13.54%) species are classified as Critically Endangered (CR) , 2 (2.08%) Near Threathened (NT) and 81 (84.4%) Least Concern (LC).
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