5 CONCLUSION
Based on the actual distribution data of PWD and current (1950–2000) and future (2050 and 2070) climate data, the MaxEnt model was used to predict the potential distribution area of PWD in China. The prediction results showed that, under current climate and environmental conditions, moderately and highly suitable habitats are mainly distributed in Anhui, Jiangxi, Hubei, Hunan, Guangdong, Guangxi, Sichuan, and other places. In 2050 and 2070, the area of total suitable habitat and highly suitable habitat will expand significantly and spread to the Northeast. The main climatic factors affecting the potential geographical distribution of PWD are temperature (max temperature of the warmest month (bio5), mean temperature of the driest quarter (bio9), rainfall (coefficient of the variation of precipitation seasonality (bio14), and precipitation of the wettest quarter (bio16). By predicting PWD’s potential geographical distribution, a basis for quarantine, supervision, and timely prevention and control can be obtained.