Ecosystem C storage (Mg C ha−1)was calculated by summing up the above- and below-ground C stocks. The total C storage of mangrove forest in the CMNP was scaled up by multiplying the mean ecosystem C storage (MgC ha−1) with the total area of mangrove forest (13,400 ha), and converted to carbon dioxide equivalents (CO2e) using a factor of 3.67 (Kauffman and Donato, 2012).