There are 22 species of mangrove belonging to 21 genera and 14 families in Guangxi. According to the ecological and physiognomical principles. they may be divided into 19 communities and 10 formations. The ecological series are composed of Avinnia marina, Kandelia candel, Aegiceras corniculaturn, RhinoUplwra, tylosa and Bruguiera gyinievrrhiza formations as well as coast semimangrove, which distribute in turn from outside beach(low tidal line),inside beach(high tidal line)to coast(above tidel line). This i...