Abstract:Reed ( Phragmites communis ), one of the intrazonal plants, is a dominant or constructive species in the wetland communities and widely distributes all over the world. The ground water depth plays important roles in the formation of reed biomass and its population dynamics. The relationship between the structural component biomass of reed population and ground water depth was investigated using Pearson correlative analysis in order to reveal how reed responses to changes of ground water depth in the dese...