"Biome shift" refers to a change or movement of a natural community of plants and animals from one area to another because of various factors like climate change or human activities. Full definition
Surprisingly, the ecosystems most vulnerable to major biome shifts are the already hot regions around the equator. (discovermagazine.com)
As recently as the last glacial period, local climates and whole biomes shifted substantially — and in short order, forcing many species to move, adapt or die out. (scientificamerican.com)
This is a map of the vulnerability of ecosystems to biome shifts due to climate change and of habitat loss due to land cover change. (sciencedaily.com)