population sizes of presently occurring native species are expected to decline, especially in the Barents Sea  . Ocean acidification is projected to continue globally, and while its impact is uncertain and projected to be less than the effect of warming, it may lead to changes in marine food webs due to varying effects on marine species . Hotspots in temperate latitudes are projected to have assemblages modified by immigration from the tropics and emigration to polar waters. Where land barriers and other geographical limits to range shifts occur, limited dispersal and habitat fragmentation may also limit the capacity of some species to track climate velocities, such as in the Baltic Sea  , Mediterranean Sea   and Antarctica   .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report