TS.B.1.1 Anthropogenic climate change has exposed ecosystems to conditions that are unprecedented over millennia , which has greatly impacted species on land and in the ocean . Consistent with expectations, species in all ecosystems have shifted their geographic ranges and altered the timing of seasonal events . Among thousands of species spread across terrestrial, freshwater and marine systems, half to two-thirds have shifted their ranges to higher latitudes , and approximately two-thirds have shifted towards earlier spring life events  in response to warming. The move of diseases and their vectors has brought new diseases into the high Arctic and at higher elevations in mountain regions to which local wildlife and humans are not resistant . These processes have led to emerging hybridisation, competition, temporal or spatial mismatches in predator-prey, insectplant and host-parasite relationships and invasion of alien plant pests or pathogens .  
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report