Data: the nature of soil Blue Carbon varies across mangrove geomorphic settings

We sampled distinct mangrove coastal typologies spanning 36 degrees in latitude and 45 degrees in longitude across the Indo-West Pacific biogeographic region. We constrained our investigation to Rhizophora spp. mangroves, which is noteworthy for its ubiquitous occurrence in mangroves throughout the tropical world (Tomlinson 1986). We studied four types of mangrove settings: a delta setting, an estuary setting, a terrestrial open coast setting, and a karstic open coast setting . The delta setting (Can Gio mangrove) was located in the south of Vietnam (10°30′ N, 106°52′ E); the karstic open coast setting (Dumbéa sur mer mangrove) was in the French overseas territories of New Caledonia (22° 8' S, 166° 26' E). The terrestrial estuary and open coast terrestrial settings (Halloran and North Stradbroke mangroves) were located on the east coast of Australia (27° 31' S, 153° 27' E). At each site, we extracted soil cores from below the Rhizophora spp. mangrove forest, between 1 to 2 meters from a Rhizophora spp. tree trunk at 0-20 cm and 80-100 cm soil depth.