Analysis of the relationship between the damage of Mikania micrantha and ecological factors in Neilingding Island, Guangdong Province, China Correlation analysis on the damage of Mikania micrantha to plant communities in Neilingdind Island of Guandong Province,China The Age Composition and Dynamics of Population in Neilingding Island ,Guangdong Province Chemical herbicide salfometuron-Ethyl to controll Mikania micrantha and its residue in the soil A study on the flora of Neilingding Island in Guangdong Province