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Floristic changes at Khersan Glacier Territory, Alamkuh Mountain, Central Alborz, North of Iran

Floristic changes at Khersan Glacier Territory, Alamkuh Mountain, Central Alborz, North of Iran KOUROSH KAVOUSI1, TAHER NEJADSATTARI 1,, YUNES ASRI2, HAMID EJTEHADI3, RAMEZAN ALI KHAVARI-NEJAD1 1Department of Biology, Science and Research Branch, Islamic Azad University, Hesarak-1477893855, Tehran. Iran, email: 2Research Institute of Forest and Rangelands, National Botanical Garden of Iran, P.O. Box 13185-116, Tehran, Iran 3Department of Biology, Faculty of Science, Ferdowsi University of Mashhad, Azadi Square, Mashhad 9177948974, Iran Manuscript received: 12 October 2015. Revision accepted: 14 November 2015. Abstract. Kavousi K, Nejadsattari T, Asri Y, Ejtehadi H, Khavari-Nejad RA. 2016. Floristic changes at Khersan Glacier Territory, Alamkuh Mountain, Central Alborz, North of Iran. Biodiversitas 17: 11-15. Extensive investigation in subnival-nival area around Khersan glacier moraine introduced 71 vascular plant species. From this list 43 species have been listed in Noroozi (2001) in “ subnivalnival vascular plant species of Iran : a unique high mountain flora and its threat from climate warming ” and the others are new for subnival- nival area of Iran. Among this plant list 31 species had introduced with Kotschy (1861a,b), Bornmuller (1904), Melchior (1937), Klein (1982), european researchers and the other is named for the first time from Khersan glacier territory. Many species such as Astragalus macrosemius, Pseudocamelina kleinii, Crepis multicaulis subsp. congesta, Didymophysa fedtschenkoana and Draba melanopus due to glacier condition have very sensitive habitat, vulnerable and only gathered from restrict area with conservation value. Vegetation change happened in many nival and subnival area with upward movement in the same habitat and movement from lower altitude at alpine towards summit in subnival and nival. Carex oreophila, Campanula stevenii, Bromus barchystachyus, Oxytropis immersa, Erigeron uniflorus,Trachydium pauciradiatum, Scorzonera radicosa and some other species are surprisingly movement to subnival area and many nival and subnival species such as Didymophysa aucheri, Didymophysa fedtschenkoana, Dracocephalum aucheri and Arabis caucasica have come significantly upward in nival. The movement is different in all side of Khersan glacier moraine in north, south and the east (beside moraine tongue) slops and limited with presence of soil natural generation and other ecological remarks. Limitation for soil generation starts at different altitude in northern, southern and eastern slopes of Khersan glacier valley. This study examined changes of flora in Khersan glacier territory during recent decades according to extensive data gathering, full list of Khersan glacier territory introduced Barbarea stricta, Draba melanopus, Pseudocamelina kleinii, Crepis multicaulis subsp.congesta as new report for flora of Iran and flora Iranica area. Keywords: Alamkuh, alpine, glacier territory, Khersan, moraine, subnival-nival

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