The Blue Carbon Value in Mangrove Ecosystems Under Different Growth Conditions

Abstract

Each mangrove ecosystem had different carbon absorption capacities depending on the mangrove stand itself. The aim of this study was to compare the blue carbon value of mangrove ecosystems under different growing conditions. The research was conducted in Sangkaragung Village, Jembrana Regency, Bali. The measurement technique used to assess the blue carbon value of mangroves was conducted at the surface without harvesting (non-destructive sampling), following the method of carbon stock estimation for mangrove ecosystems. The research results showed that the mangrove species in the study location included Avicennia marina, Avicennia alba, Rhizophora apiculata, Ceriops decandra, Sonneratia alba, Bruguiera gymnorrhiza, and Xylocarpus granatum. The highest biomass carbon storage value was found in the natural mangrove ecosystem in the pond, amounting to 17.53 C/ha. The highest organic matter value at a depth of 0–15 cm was found in the planted mangrove in the pond, with a value of 17.01%, at a depth of 15–30 cm in the natural mangrove in the pond, with a value of 14.82%, and at a depth of 30–50 cm, the planted mangrove in the pond showed the highest value at 28.32%. The highest organic carbon storage was found in the planted mangrove in the pond at a depth of 0–15 cm, with 205.05 C/ha, at a sediment depth of 15–30 cm in the natural mangrove in the pond, with 240.12 C/ha, and at a sediment depth of 30–50 cm, the natural mangrove in the pond also had the highest carbon absorption, with 332.12 C/ha. The total tree biomass carbon storage was 31.95 tonnes C/ha, and the sediment carbon storage was 598.19 tonnes C/ha, resulting in a total carbon storage of 630.14 tons C/ha.