75% of taxa extinction found in Earth's 'big five' mass extinction events . Even though species-area relationships tend to overestimate extinction rates , there is evidence that species richness in tropical forests is alarmingly approaching or surpassing the taxa extinction value in this period  should deforestation and habitat loss continue at the current pace . Moreover, there is reasonable understanding that these numbers are underestimated and, as such, tropical forest loss and degradation alone will precipitate a sixth mass extinction event . A total of 13 out of the 25 global biodiversity hotspots for conservation are located in tropical forests, such as Brazil's Atlantic Forest and India's Western Ghats/Sri Lanka . While forest loss and degradation have been the main cause of tropical biodiversity loss in the past, climate change now arises as a major threat not only for individual tropical forest species or taxa-as already observed for frogs
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report