Most simulations predict a significant geographical shift of transition areas between tropical forests and savanna in the tropical and subtropical Americas and Himalayas . Forest dieback, as postulated for the Amazon region, does not occur in the majority of simulations . Model projections of future biodiversity in tropical forests are rare. Arguably, species are most vulnerable to climate change effects at higher altitudes or at the dry end of tropical forest occurrence  . Tropical lowlands are expected to lose plant species as temperatures rise above species' heat tolerance, but could also generate novel communities of heat-tolerant species  .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report