Although conservation status has only been assessed globally for about 6% of all species  and most confirmed extinctions and threatened species are terrestrial, a higher proportion of freshwater species are threatened. This is reflected in the higher proportion of freshwater hotspots impacted by humans . The rate of species endemicity is exceptionally high in freshwater biogeographic realms , at 89-96% for fish in all but one realm, compared to 11-98% for terrestrial vertebrate groups  and 17-84% for marine realms . Already, one-third of wetlands have been lost and 9000 freshwater species are threatened with extinction without considering the effects of climate change , and only 13% of world rivers were recently classified as least impacted .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report