Climate change increases risks of biome shifts on up to 35% of global land at ≥4ºC GSAT warming, that emission reductions could limit to <15% for <2℃ warming . Under high-warming scenarios, models indicate shifts of extensive parts of the Amazon rainforest to drier and lower- biomass vegetation , poleward shifts of boreal forest into treeless tundra across the Arctic, and upslope shifts of montane forests into alpine grassland . Area at high risk of biome shifts from changes in climate and land use combined can double or triple compared to climate change alone . Novel ecosystems, with no historical analogue, are expected to become increasingly common in the future . 
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report