Increases in above-ground NPP, and woody cover at the expense of grassland, are projected in some of the tropical and subtropical drylands , in Mediterranean wood pastures  and in the northern Great Plains of North America . Godde et al.  projected that woody encroachment would occur on 51% of global rangeland area by 2050 under RCP8.5. The future makeup of grasslands under climate change is uncertain, given the variation in responses of the component species, though this variation may provide a climate buffer  . C4 grass species are regarded as less responsive to elevated carbon dioxide than C3 species, though this is not always the case .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report