The temperature response of photosynthetic carbon uptake in tropical trees seems remarkably similar across moist and dry forest types, as well as for light-demanding, fast-growing species compared with shade-tolerant, slow-growing species . It is generally agreed that photosynthesis in tropical species can acclimate to moderate levels of warming but beyond this there would be no net gain in carbon . The factor that limits photosynthesis in different tropical forests will depend on water availability. In water-limited dry forests, photosynthesis may decline largely due to stomatal closure, while in wet forests the decline may largely be driven by warming-related changes to leaf biochemistry . A recent modelling approach suggests that the limits of photosynthetic thermal acclimation may be an increase of about 2ºC, in terms of maximum tolerated temperature, with enhanced tree mortality beyond this level of warming .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report