唇形科苣叶鼠尾草的新分布及适生分布区预测

在野外调查的基础上,报道了苣叶鼠尾草在贵州和广西的省级新分布.基于苣叶鼠尾草16个分布数据和11个环境因子参数,运用最大熵(MaxEnt)模型对其适生分布区进行预测,并通过受试者工作特征(receiver operat-ing characteristic,ROC)曲线对模型精度进行验证.结果表明:(1)ROC曲线下面...

New Record of Salvia sonchifolia (Lamiaceae) and Prediction of Its Suitable Distribution Areas

Based on field investigations,we reported the new distributions of Salvia sonchifolia in Guizhou and Guangxi Province.On the basis of 16 distribution records and 11 environmental factor parameters,the MaxEnt model was applied to predict the suitable distribution areas of S.sonchifolia.The accuracy of the model was verified by Receiver Operating Characteristic Curve(ROC).The results showed that:(1)the mean value of the area under ROC curve was 0.999,and the accuracy of the model was high,suggesting its feasibility of predicting potential suitable areas of S.sonchifolia.The suitable distribution areas of S.sonchifolia were mainly located in Southwestern China and parts of countries adjacent to Southern China.The core suitable areas were concentrated in the limestone mountainous areas of Yunnan,Guizhou,Guangxi,Eastern Sichuan,and the China-Vietnam border in southeastern Yunnan.(2)Jackknife test indicated that the main environmental factors determining the potential distribution areas of S.sonchifolia were precipitation of warmest season,mean temperature of driest season,precipitation of wettest month and lowest temperature of coldest month.Statistical analysis of the environmental factors related to the potential distribution demonstrated that the most appropriate habitat conditions for S.sonchifolia were precipitation of warmest quarter from 650 mm to 1500 mm,lowest temperature of coldest month from 0℃to 10℃,mean diurnal range of temperature from 6.5℃to 8.5℃and precipitation of coldest quarter from 0 mm to 250 mm.This study will be helpful for resource survey and related study of S.sonchifolia.