Abstract

Mangroves are highly productive coastal ecosystems that play a critical role in carbon sequestration and climate change mitigation. This study quantified carbon stocks in oceanic mangroves of the Gili Sulat–Lawang Marine Tourism Park, characterized by strong tidal influence and absence of freshwater input. Carbon pools were assessed in living and dead vegetation, as well as soils across three management zones. The biomass and carbon content of living mangrove were estimated using species-specific allometric equations. The dead mangrove carbon pool was estimated based on the biomass of standing dead wood and downed wood. Soil organic matter was analyzed using the loss on ignition method, in which soil samples are combusted at high temperature to determine organic content. The total carbon stock was estimated at 379.137 Mg C/ha, with living vegetation contributing 53.55%, soils 44.26%, and dead biomass 2.19%. The highest carbon stock was recorded in the utilization zone, followed by the core and fisheries zones. These findings highlight the substantial carbon storage potential of oceanic mangroves, emphasizing their relevance to Indonesia’s Nationally Determined Contribution (NDC) targets and the importance of incorporating mixed-species restoration strategies to enhance ecosystem resilience and sustainability.

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