ORIGIN, EXPANSION AND DECLINE OF PHRAGMITES AUSTRALIS

The common reed Phragmites australis (Cav.) Trin.ex Steud. is a clonal plant which is sensitive to environmental disturbances. In the paper, origin, expansion and decline of Phragmites australis were summarized, and the reasons for expansion and decline were the disturbance of human activity and genotype invasion. In order to better use reed resource, mankind should try his best to reduce the disturbance to reed habitat.