High biodiversity and ecosystem carbon generally occur together, with rainforests in the Amazon, Congo and Indonesia containing the largest above-ground vegetation carbon stocks  and the highest vascular plant species richness  in the world. Above-ground ecosystem carbon and animal species richness show high correlation but also high spatial variability . Above-ground carbon is correlated to genus richness globally , but to species richness only in local areas . Species richness generally increases vegetation productivity in the humid tropics while tree abundance increases productivity in drier conditions . Across the Amazon, ~1% of tree species contain 50% of the above-ground carbon, due to abundance and maximum height . Above-ground carbon in tropical forests shows positive correlations to vertebrate species richness  . In logged and burned tropical forest in Brazil, species
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report