Changes in freshwater systems are consistent with changes in terrestrial systems: earlier development of phytoplankton and zooplankton and earlier spawning by fish in spring as well as extension of the growing season are occurring  . Phenological changes in lakes have been related to rising water temperatures, reduced ice cover and prolonged thermal stratification . Crozier and Hutchings  reviewed the phenological changes in fish and documented that changes in the timing of migration and reproduction, age at maturity, age at juvenile migration, growth, survival and fecundity were associated primarily with changes in temperature. The median return time of Atlantic salmon to rivers in Newfoundland and Labrador advanced by 12-21 days over the past decades, associated with overall warmer conditions .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report