Identification of Potential Distribution Areas of Taxus wallichiana in Xizang Based on MaxEnt Model
In this study,MaxEnt model software and ArcGIS software were used to predict the potential distri-bution range of Taxus wallichiana in Xizang.The prediction accuracy was tested by ROC curve,and the main environmental variables screened by jackknife test.The ecological environment conditions suitable for Taxus wallichiana were analyzed by the response curve of the main environmental variables.The results showed:the prediction accuracy was high,and the AUC value of the prediction model was 0.991;the distribution range of Taxus wallichiana in Xizang was mainly located in the southeast of Xizang,from the northern foot of the Hima-layas to the Hengduan Mountains,it was distributed in Bomi County,Bayi District,Motuo County,Chayu County,Longzi County,Luozha County,Yadong County,Dingjie County,Dingri County,Nyalam County and Jilong County,which were highly consistent with the results of the field investigation;elevation,annual precip-itation,organic carbon content of topsoil,exchangeable sodium salt of topsoil and other environmental factors had the great impact on the distribution of Taxus wallichiana.
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