'Intertidal rocky shores are also expected to be at very high risk  under the RCP8.5 scenario . These ecosystems have low to moderate adaptive capacity, as they are highly sensitive to ocean temperatures and acidification.' 'Benthic species will continue to relocate in the intertidal zones and experience mass mortality events due to warming . Interactive effects between acidification and warming will exacerbate the negative impacts on rocky shore communities, causing a shift towards a less diverse ecosystem in terms of species richness and complexity, increasingly dominated by macroalgae .'
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report