The SR15 concluded that limiting warming to 1.5ºC will be more favourable to terrestrial ecosystems, including forests, relative to a 2°C warming . In general, a 2ºC warming could lead to two times more area of biome shifts compared with a 1.5℃ warming. As a result, keeping a cooler average global temperature will lead to lower extinction risks. The special report supports the AR5 conclusion that a warmer planet will impact wide swaths of forests adversely. For example, higher temperatures will promote fire, drought and insect disturbances. Consistent with AR5, SRCCL projected that tree mortality will increase with climate change . In addition, forests will be more exposed to extreme events such as extreme heat, droughts and storms. The incidence of forest fires will likewise increase.
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report