Pacific and Indian Ocean basins, where some increased total seafloor biomass is projected . Updated simulations with the same benthic biomass model  forced with the CMIP6 ESM UKESM-1 project declines in total seafloor biomass of -9.8 and -13.0% by 2081-2100 relative to 1995-2014 for SSP1-2.6 and SSP5-8.5, respectively . These projected changes in benthic biomass are based on limited evidence. Development of ensemble projections forced with a range of ESMs and a benthic model that considers the ecological roles of temperature , oxygen  and ocean acidification  will provide opportunities to better quantify uncertainty in projected declines in total seafloor biomass under climate change.
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report