Cascading and interacting effects of climate change impacts in polar regions  will reduce access to, and productivity of, future fisheries, and pose significant risks to regional and global food and nutritional security that increase with atmospheric carbon levels and declines in sea ice  . Although it is expected that fisheries will continue to contract poleward under future warming   , global and regional models differ in their projections of fisheries catch potential for the polar regions under climate change. For example, some global- scale models project increases in potential fishery yields in Arctic Canada , whereas many observational studies and high-resolution regional projections suggest overall declines in biomass, productivity and yield associated with warming and loss of sea ice in multiple regions such as the Bering Sea  . Reduced production of macronutrients and protein by polar marine sources will disproportionately impact people already experiencing food and nutritional scarcity , marine-dependent communities within and beyond polar regions, and women and children who require higher quantities of macronutrients .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report