Explanation:

Mangroves Saltmarshes are one of the key coastal ‘blue carbon’ habitats, recognised for their ability to store carbon within above- and below-ground biomass and sediments.
• With an average annual carbon sequestration rate of 6 to 8 tonnes of carbon dioxide equivalent per hectare 10, saltmarshes sequester carbon at a rate two to four times greater than that recorded for mature tropical forests.
These are ecosystems located in the intertidal zone of sheltered marine and estuarine coastlines.
• The intertidal zone is the seashore area which is covered by water at high tide but exposed to the air at low tide.
• Saltmarshes are of ecological importance as they underpin the estuarine food web.
• Saltmarshes tend to grow in areas exposed to relatively low energy waves, such as estuaries and tidal inlets.