3.4. LGM, present and future distribution of R. aureum.
The average training AUC for ten replicate runs is 0.981, and the standard deviation is 0.035 which indicated an excellent predictive model performance. Minimum training presence logistic threshold was 0.15. The predicted distribution ofR. aureum (Figure 4B ) is consistent with the present distribution records including Changbai Mountain, Wangtiane Mountain, Laobai Mountain and North Koera, showing that the distribution of R. aureum is conditioned by environmental factors. The distribution of the LGM based on CCSM4 (Figure 4A ) was substantially different from the present. The assessed distribution of R. aureum during the LGM was expanded to Korean Autonomous Prefecture of Yanbian and northern mountain of Korean peninsula. The predicted future and present distribution ofR. aureum was considerably different in geographical range (Figure 4C, 4D ). The major difference was that the predicted future suitable habitats showed a significant lessening in comparison with the present one. Only the peak of Changbai Mountain and some area in the North Korea would suitable for R. aureum under the rcp85 scenario. Loss of suitable habitats because of the climate changing indicated a drastically range contraction.