Fig.
6.The change of habitat in different basins
The total migration direction of birds is different from that in
different regions. The shifts of population centroid in different
regions of habitat are shown in the Fig.7a. The movements of these
regions showed that the tendency of the distribution is moving towards
the mainstream, which also revealed that the distribution
of
migratory birds in future scenario will be compressed.
The
population centroid in
Yangtze
River basin will move far 44.94 km towards southeast.
The
population centroids in
Haihe
River Basin, Pearl River Basin, Yellow River Basin, Southeast Basin and
Huaihe River Basin will move 34.26 km, 31.03 km, 25.33 km, 23.48 km and
16.68 km.