Abstract: Mangrove wetland is one of the most productive ecosystems in the world. Its occupied area is not vast, but its carbonsequestration capability per unit area is quite strong, being an important ‘blue carbon’ sink, and the storage and dynamics of the organic carbon in the sink having great effects on the balance of global carbon cycle. In this paper, the present research progress on the organic carbon storage (including that of vegetation biomass and sediment) in mangrove wetlands and related measurement methods, the components and source of the sediment organic carbon, and the factors affecting the dynamics of the organic carbon in mangrove wetlands were summarized, and the existing problems and future research trends were analyzed. In terms of the rapid decline of the carbonsequestration capability of mangrove wetland and the rapid decrease of the wetland resource, it would be necessary to accurately assess the carbon sink and its dynamics of mangrove forests, which would contribute to the carbon measurement and valuation of coastal wetlands under the treaty of climate change framework, help to reveal the feedback relationships of mangrove ecosystem and global change, and provide a basis for the restoration and protection of mangrove ecosystems.

Key words: soil warming, nitrogen addition, diameter class length distribution, extreme value model.