Abstract: Three most representative areas of the eastern coast, namely the Weijiangkou Wetland, Chongming Dongtan Wetland and Yancheng Danding Crane Reserve as the research objects, and analyzed the aspects of nutrient distribution mechanism, community characteristics and biomass and organic matter differences, respectively, to identify the mechanism of the invasion. The results indicated that the main reason is due to its strong invasion ability being higher than the genetic penetration ability and higher genetic differentiation ability than other plants. Meanwhile, the we also studied the impacts on the local the beach-coated flora and water birds to illustrate Spartina alterniflora′s negative influences on the habitat of the eastern coast. On this basis, it was suggested that more comprehensive managing methods should be adopted, and the research and development of its utilization as the core values, to further strengthen the control and prevention of the invasion of Spartina alterniflora′s countermeasures.

Key words: Spartina alterniflora invasion, Eastern Costal areas, intrusion mechanism, control measures, resource utilization