Fig. 7. (a) The shifts of habitat population centroid and(b) the percent contribution of the environment variables in 6 basins.
The result shows that NDVI plays a great role in Yangtze River basin, Huaihe River Basin, Southeast Basin and Pearl River Basin, which the percent contribution for distribution is 43.9%, 48.6%, 49.1%, and 43.5% respectively. In these regions, the food is the constraint of the distribution. LUCC is another constraint accounting for 30.9%, 23.8% and 19.6% importance respectively in Haihe River Basin, Yellow River basin and Pearl River basin. The human activity plays a important role in distribution of these regions. Alt is a important variable in Yangtze River basin and Pearl River basin accounting for 34.9% and 13.7%, respectively. These areas have wide range of elevation.
4.1.2 How does climate change influence the climate zones?
The habitats change mostly in the 3 climate zones (STZ, MSZ, MTZ). The area of habitat has a significant decrease in these 3 climate zones in future. The habitat will loss about 61247\(\text{km}^{2}\)accounting for 7.51% of MSZ total habitat area. The habitat area of MTZ will reduce 11.43% about 27955 \(\text{km}^{2}\) in future. The habitat area will decrease 6499 \(\text{km}^{2}\) which is about 2.17% of total habitat area of STZ.