and upstream were found for 32 stream fish species in France . In North America, for the bull trout  a reduction in the number of occupied sites was documented in a watershed in Montana . Other impacts include disruption of seasonal movements of migratory waterbirds that regularly visit freshwater ecosystems, with adverse impacts on their feeding and breeding . Keystone species, such as the beaver  in North America, have been moving into new areas as the vegetation structure has changed in response to higher temperatures enabling shrubs to establish in the Arctic and alpine tundra ecosystems . Increased occurrence and intensity of algal blooms have occurred due to the interactive effects of thermal extremes and low dissolved oxygen concentrations in water  . A global review found that almost 90% of all studies reviewed documented a decline in salmonid populations in North America and Europe, and identified knowledge gaps elsewhere . Another review  found declines in Atlantic salmon in Finland and poleward shift in coastal fish species, while another review  noted hybridisation between freshwater species like invasive rainbow trout  and native cutthroat trout .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report