We have studied the changes of the environmental and vegetational factors according to the hydro-seral
stages in the shoreline of the lagoons, Korea. We have divided seral stages into 7 stages from open water stage to
the stratified forest stage considering as the characteristics of water body, dominance of submerged and emergent
plant, and development of the shrub, subtree and tree layer. According to the successional stage, water depth
gradually decreased and water quality changed from seawater to brackish water and from brackish water to fresh
water, organic matter in a soil layer gradually increased, and the litter layer grew up. As the development of the
vegetation structure, the life-form of the vascular plants changed as follows; open water → submerged plant and
floating-leaved plant → emergent plant and submerged plant → emergent plant → emergent plant, mesophyte and
scrub → mesophyte. In the late seral stage, the 3 different forest types were established by the water retention or
drainage and nutrient accumulation of the soil layer. Salix dominant forest developed in the wetted sites, the forest
type dominated by Pinus thunbergii, Carex pumila and mesophytes developed in the well drained sites causing by
sand substrate, and the forest type dominated by the planted or ruderals such as Pinus densiflora, Robinia
psedo-acacia, Festuca ovina, Setaria viridis ect. developed in the sites composed of forest soil introduced by
artificial reclamation.
Keywords : Lagoon, Hydrosere, Hydrophyte, Succession, Restoration