even under Low warming . These systems comprise a large fraction of unique and endemic biodiversity, with species impacts often exacerbated by multiple drivers of global change . Roughly one-third of all known plant species are extremely rare, vulnerable to climate impacts, and clustered in areas of higher projected rates of anthropogenic climate change . Much evidence shows increased risk of the loss of 10% or more of terrestrial biodiversity with increasing anthropogenic climate change  , likely with 2ºC warming above pre-industrial level , with consequent degradation of terrestrial, freshwater and ocean ecosystems  and adverse impacts on ecosystem services  and dependent human livelihoods . Adverse impacts on biodiversity may show lagged responses , and loss of a substantial fraction of species could occur abruptly, simultaneously across multiple taxa, below 4℃ of global warming .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report