'Sandy beach ecosystems will increasingly be at risk of eroding, reducing the habitable area for dependent organisms .' 'Sandy shorelines are expected to continue to reduce their area and change their topography due to SLR and increased extreme climatic erosive events. This will be especially important in low-lying coastal areas with high population and building densities .' 'Assuming that the physiological underpinning of the relationship between body size and temperature can be applied to warming , the body size of sandy beach crustaceans is expected to decrease under warming .' Sandy beaches transition from undetectable to moderate risk between 0.9ºC and 1.8℃  of global sea surface warming and from moderate to high risk at 2.3ºC-3.0°C of global sea surface warming . 'Projected changes in mean and extreme sea levels and warming under RCP8.5 are expected to result in high risk of impacts on sandy beach ecosystems by the end of the 21st century , taking account of the slow recovery rate of sandy-beach vegetation, the direct loss of habitats and the high climatic sensitivity of some fauna.' 'Under RCP2.6, the risk of impacts on sandy beaches is expected to be only slightly higher than the present-day level . However, pervasive coastal urbanisation lowers the buffering capacity and recovery potential of sandy beach ecosystems to impacts from SLR and warming, and thus is expected to limit their resilience to climate change .' 'Coastal squeeze and human-driven habitat deterioration will reduce the natural capacity of these ecosystems to adapt to climate impacts .'
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report