3.5 Distribution barycenter migration
To study the ecological barycenter migration under the context of climate change, the centroid coordinates and migration distances of the current and future(2050 and 2070) distribution of B. gargarizanswere calculated(Table S9, Table S10). And the results of distribution barycenter migration show that the distribution center of B. gargarizans will have moved to 107.05°E ~ 108.94°E, 31.38°N ~ 32.74°N, and the distance of barycenter migration will reach 38.47km ~ 249.45km. And by 2070, the distribution of B. gargarizans will continue to change, and its distribution center will migrate to 107.00°E ~ 108.75°E, 31.95°N ~ 32.37°E, the migration distance is between 93.15 Km and 270.67 Km. Fig.5 and Fig.6 show that the suitable distribution area of B. gargarizans will decrease in the southeast, and gradually migrate and increase to the midwest in China.