We investigated the diversity of epilithic mosses in Sejila Mountain of Nyingchi City,Tibet,and evalua-ted the biomass,soil formation capacity,and water holding capacity of three dominant species.The results showed that there were 8 families,12 genera and 16 species of epilithic mosses.Hypnaceae,Thuidiaceae,and Dicranaceae were the dominant families,while Ptilium crista-castrensis,Dicranum fuscescens,and Actinothuidium hookeri were the dominant species.Biomass of dominant species of epilithic mosses was 110.7-763.6 g·m-2,with a soil forma-tion capacity of 234.9-9063.3 g·m-2,a maximum water holding capacity of 2164.5-8514.5 g·m-2,a maximum water holding rate of 169％-400％,a natural water holding capacity of 1984.74-6764.5 g·m-2,and a natural wa-ter holding rate of 95％-318％.Therefore,the epilithic mosses in Sejila Mountain play an important role in soil for-mation and water holding,which is of great significance for soil erosion control and also for soil and water conserva-tion.
Sejila Mountainepilithic mosseswater holding effectpedogenic function
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