Objective:Schima superba was a pioneer tree in the process of vegetation succession,and an ideal tree for constructing forest fire prevention belts.The study of the ecological characteristics of S.superba and the prediction of its potential suitable areas in China in the future climate provide a theo-retical basis for cultivating large-diameter reserve forests,increasing forest carbon storage and assist-ing China in achieving carbon neutrality.Methods:The author based on 375 distribution points of S.su-perba,took climate,soil and topography as environmental factors and conducted the research by using MaxEnt model combined with GIS technology.Results:The results showed that the AUC values of MaxEnt model training and test data were 0.936 and 0.943 respectively,indicating that the model had high prediction accuracy and could accurately predict the impact of environmental factors on the distri-bution area of S.superba.Climatic factors had the greatest influence on the distribution of S.superba,and the rainfall in the coldest season was the most important environmental factor affecting the distribu-tion of the suitable area of S.superba in China,with the model contribution rate reaching 76.3%.Cli-mate factors had the greatest influence on the distribution of S.superba,and the rainfall in the coldest season was the most important environmental factor affecting the distribution of the suitable area of S.superba in China,with the model contribution rate as high as 76.3%.The following factors were annu-al rainfall,elevation,soil category and standard deviation of seasonal temperature variation.The con-tribution rate of the above five factors reached 98.9%,which played a decisive role in the distribution of S.superba.Conclusion:The potential suitable area of S.superba in China was approximately 1.818×106 km2,accounting for approximately 18.94%of the country's land area.There mainly concen-trated in the third and second steps south of the Yangtze River,including Zhejiang,Jiangxi,Fujian,Hunan,Guangdong,Guangxi,Taiwan,Hainan,Guizhou,and other places.Under different future cli-mate scenarios in the 2060s and 2080s,the distribution range of S.superba extremely high,high,me-dium,and low suitable areas changed,showing a trend of"southward retreat and westward expan-sion",gradually migrating to higher altitude areas.The extremely suitable area gradually showed a trend of"southwestward migration".
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