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.