Carbon storage and burial in mangroves, salt marshes and seagrass meadows  help regulate ocean and coastal carbon cycling and may contribute to nature-based mitigation, although regional estimates vary widely based on climatic and edaphic conditions . In addition, coastal vegetated ecosystems provide substantial and interdependent regulating, provisioning and cultural ecosystem services. These services include:  disproportionately high biodiversity per unit area ;  abundant habitat  and nurseries for aquatic, terrestrial, aerial and microbial species;  natural filtration of waste and stormwater runoff into the coastal ocean ;  coastal protection ;  food and natural materials ; and  support for tourism, livelihoods and cultural activities . Global estimates of services provided by coastal blue carbon ecosystems depend on the quality of available mapping, which is currently best developed for mangroves , and improving for salt marshes and seagrasses .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report