The distribution patterns and risk analysis of 2 invasive plants in Hainan
[Objective]To predict the potential geographic distribution of Mimosa diplotricha C.Wright and Mimosa diplotricha var.inermis(Adelbert)Veldkamp in Hainan,and to determine the invasion risk level of the 2 invasive plants in Hainan,so as to provide reference for the management of invasive plants and control of invasive plants in Hainan.[Method]The MaxEnt model and geographic information system(GIS)were used to assess the main environmental varia-bles governing Mimosa diplotricha C.Wright and Mimosa diplotricha var.inermis(Adelbert)Veldkamp,and to simu-late and delineate the potential geographic distribution of the 2 invasive plants in Hainan;qualitative and quantitative inva-sion risk analyses of the 2 invasive plants were carried out to determine the level of their risk.The simulation results showed that area under a receiver operating characteristic curve(AUC)of Mimosa diplotricha C.Wright and Mimosa dip-lotricha var.inermis(Adelbert)Veldkamp were 0.956 and 0.996 respectively,which was much higher than the random prediction value(0.500),indicating that the prediction results of the model had high confidence.[Result]The model pre-diction results showed that in China,the suitable habitats for 2 invasive plants were mainly distributed in the southern re-gions,particularly in provinces such as Guangdong,Hainan and Fujian.In Hainan,the potential suitable areas were mainly concentrated in the northeastern part and showed a trend of spreading towards the southwest,which was basically consistent with the distribution areas of actual survey results.According to the latitude distribution prediction results,Mi-mosa diplotricha C.Wright mainly distributed between 50º northern latitude and 50º southern latitude,while Mimosa dip-lotricha var.inermis(Adelbert)Veldkamp mainly distributed between 10º northern latitude and 30º northern latitude.Based on the risk index system criteria layer assignment,the calculated risk value R for Mimosa diplotricha C.Wright was 69.15,which was higher than 61.00,classifying it as a particularly harmful species;the risk value R for Mimosa dip-lotricha var.inermis(Adelbert)Veldkamp was 58.00,falling between 29.50 and 61.00,classifying it as a highly harmful species.[Conclusion]Mimosa diplotricha C.Wright is a particularly hazardous species and its introduction should be strictly prohibited;Mimosa diplotricha var.inermis(Adelbert)Veldkamp is highly hazardous and its introduction must be strictly restricted.Since the 2 invasive plants have been introduced into China,necessary emergency measures should be taken to carry out quarantine,monitoring and eradication,to prevent them from further spreading and causing greater harm.
Mimosa diplotricha C.WrightMimosa diplotricha var.inermis(Adelbert)VeldkampMaxEnt model predictioninvasion risk anlysisHainan province
万方数据
维普
