Abstract: Stationals studies including the natural restoration process of aquatic vegetation, community composition, structure, dynamics and function were conducted in Lake Yunihu. 41 aquatic plants found in Lake Yunihu falls into 20 families and 29 genera. Four life-forms of plants distribute all over the lake, with emergent (15 species) and submergent (13 species) plants predominant in numbers. There are 8 distribution types consisting of 16 worldwide components and 10 East-Asian components. Strata and sguusia structures are dealt with in community structure study.8 commnunity types are classified. The standing biomass of communitites is 3268.8 g·m^-2 and the total crop in the lake is 16365.2tons.

Key words: Lake Yunihu, Aquatic vegetation, Restoration, Ecological pool, photosynthetic characteristics, diurnal photosynthetic variation, root excision, moisture content, water use efficiency