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

Khersan glacier moraine introduced 71 vascular plant species. From this list 43 species have been listed in Noroozi et al. (2011) in “ subnival-nival 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 (1906), 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 areas 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 brachystachyus, 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 morain