Estimated carbon stock of various mangrove zonation in Marsegu Island, West Seram, Maluku

This study aimed to determine the amount of carbon storage of various mangrove zonation formed on Marsegu Island, West Seram, Maluku. Marsegu Island is a Raised Coral Island which has 46.75% mangrove vegetation (112.29 ha) with the area of each zonation is 32.12 ha (proximal zone), 39.00 ha (middle zone) and 41.17 ha (distal zone). The calculation of stored carbon stocks of various mangrove zonation in Marsegu island used SNI guidelines (Indonesian National Standard) 7724:2011. Field measurements for estimation of forest carbon stocks (ground-based forest carbon accounting). The estimations of above-ground carbon stored in the proximal zone, middle zone and distal zone are as follows: 52.11 t/ha, 70.50 t/ha and 140.13 t/ha. Meanwhile, the below-ground (root) carbon storage is 10.62 t/ha, 13.48 t/ha and 24.36 t/ha. The potential amount of carbon of above and below ground plus dead trees and dead- wood (necromass), with estimation soil carbon storage up to 20 cm depth, are 234.07 t/ha for the proximal zone, 317.47 t/ha for middle zone and 406.58 t/ha for the distal zone. The estimated total carbon stock in Mangrove Forest of Marsegu Island is 36,637.02 tonnes.