International Journal of Environment (ISSN: 2186-0009)  

Above and Belowground Carbon Acquisition of Mangrove Kandelia obovata Trees in Manko Wetland, Okinawa, Japan
A.T.M. Rafiqul Hoque, Sahadev Sharma and Akio Hagihara
Mangrove forests are crucial occupiers of the boundary between land and sea, being key ecosystems along many tropical and sub-tropical coastlines. Measuring carbon acquisition in trees is fundamental to understand the biomass, primary production and ecosystem function. We have estimated carbon acquisition of mangrove Kandelia obovata in Manko Wetland, Japan. A 1700 m2 pure K. obovata closed canopy stand was marked. The stand was subjected to self-thinning. Height (H, m) and stem diameter at 10% height (D0.1H, cm) of all the trees were measured. Aboveground individual mass wT (kg) was estimated based on an allometric equation established from 25 trees data. Among 25 trees, all the roots including fine roots of five trees were collected and belowground mass was estimated by the summation. Tree density was 13588 ha-1; aboveground carbon was calculated as 48.47 Mg C ha-1; belowground carbon was calculated as 22.70 Mg C ha-1 and the mean T/R ratio was found as 1.87 ± 0.01 (SE). Carbon acquisition potential of mangrove K. obovata is higher than many other terrestrial tree species.
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