Distribution Prediction and Main Environmental Variables Analysis of Machilus thunbergii in Zhejiang Province
Based on distribution of Machilus thunbergii from permanent sample plots in Zhejiang province during 2013-2020,as well as that from CVH(http://www.cvh.ac.cn/),NSII,(http://www.nsii.org.cn/),GBIF,https://www.gbif.org/),177 distribution data and 22 environmental factors in Zhejiang province were collected.Prediction of suitable area of M.thunbergii,dominant environmental factors and their thresholds were analyzed by MaxEnt model and ArcGIS software.The results showed that the prediction accuracy of the model was high,and it was suitable for the prediction of potential suitable areas of M.thunbergii in Zhejiang.The total area of suitable areas(suitability S>0.2)was 9.22×104 km2,and most areas of the province had suitability the middle level.The distribution of highly suitable areas was relatively concentrated and continuous,mainly from Lishui to Zhoushan of southern Zhejiang province.The analysis demonstrated that the variance of aspect and seasonal temperature variation were the decisive environmental factors affecting the distribution of M.thunbergii in Zhejiang province.