fig3

Figure 3. Cartoon representing deposition of seagrass-related and allochthonous organic and inorganic carbon, showing remineralization of organic carbon in surface sediment. Organic C in the deep part of the left-hand profile represents sequestered seagrass organic carbon, which is offset by the burial of inorganic C formed inside the meadow. Allochthonous organic and allochthonous inorganic C are both excluded from the calculation, because neither results from the presence of the seagrass meadow.