ブルーカーボン会計：フィリピン・ダピタン市のマングローブ生態系における炭素蓄積量と二酸化炭素放出ポテンシャルの評価

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:Provides a field-based blue carbon accounting case with sediment and vegetation carbon pools in a Southeast Asian mangrove setting.

🏢実務担当者:Offers a baseline methodology for coastal carbon projects and nature-based credit development, though unit reporting needs scrutiny.

🏛政策担当者:Illustrates how local-level blue carbon inventories can feed into national climate policy and conservation zoning.

Mangrove ecosystems are among the most carbon-rich coastal habitats, providing significant climate regulation through long-term carbon sequestration, particularly in belowground sediments. Quantifying blue carbon stocks is essential for establishing baseline data that can support conservation planning, ecosystem-based management, and emerging climate mitigation frameworks. This study assessed ecosystem carbon stocks and potential vulnerability to carbon loss in selected mangrove barangays of Dapitan City, namely Philippines – namely Oro (8°40'57.7"N, 123°26'55.5"E), Baylimango (8°42'10.3"N, 123°26'44.2"E), and Tag-ulo (8°43'23.2"N, 123°22'53.0"E). Soil organic carbon was quantified through sediment coring, depth profiling, and analysis using the Walkley-Black colorimetric method. In contrast, vegetative carbon stocks were estimated through mangrove species identification, diameter at breast height measurements, and established allometric equations. Three dominant mangrove species were recorded: Rhizophora mucronata, Rhizophora apiculata, and Sonneratia alba. Results showed that sediment carbon represented the largest ecosystem pool, with a total stock of 14,027,216.52 MgC/ha, compared with 768,922.68 MgC/ha stored in aboveground vegetation. The combined blue carbon stock across study sites was estimated at 14,796,139.20 MgC/ha. Larger mangrove extent contributed substantially to total carbon pools, emphasizing that ecosystem-scale climate benefits depend on both carbon density and spatial coverage. While carbon stock estimates indicate the potential risk of carbon release under disturbance scenarios, actual emissions outcomes remain context-dependent. Overall, Dapitan City’s mangroves represent an important blue carbon reservoir, providing a barangay-level baseline that can inform local conservation zoning, coastal resource management, and potential integration into national blue carbon and climate policy initiatives.

• semanticscholar https://doi.org/10.56899/155.04.13first seen 2026-09-21 05:15:47