Mikania micrantha is one of the leading harmful and invasive forestry plants in Guangzhou.We selected 14 environmental factors and determined their quantitative relationship with the actual distribution of the specie in Guangzhou.By using principal component analysis,we determined main influencing factors.Based on the results,we estimated the potential distribution of Mikania micrantha.Results show that: six factors including elevation,mean annual temperature,annual mean sunshine duration,mean annual precipitation,wet quarter precipitation,dry...