Mangrove ecosystem services, aside for the fisheries sector, also have ecosystem services in mitigating climate change as carbon sinks and storage. Musi river estuary located in Banyuasin Regency, South Sumatra has the potential of mangrove forests as carbon reserves. The purpose of the study is to analyze the community structure, potential carbon stocks, and economic value of mangroves in the Musi River Estuary. Data were collected at five stations using the 100 m quadratic transect method vertically to the coastline. Data analysis was conducted based on the allometric equation for biomass information, carbon storage, and the economic value of carbon stores. Mangrove ecosystems in the Musi River estuary are Sonneratia alba, Nypa fruticans, Sonneratia casiolaris, and Rhizopora apiculata. Mangrove species that have important roles in the sustainability of ecosystems are Nypa fruticans and Sonneratia alba each with IVI of 145.6 and 101.28, respectively. Carbon storage of mangrove in the Musi river estuary is 107.34 tonC / ha and carbon dioxide absorption is 393.59 tCO2 / ha with a mangrove area of ± 5276 ha. The total estimated economic value of carbon generated from mangrove are Rp174.441.016.895 (free market) and Rp455.872.524.151 (CDM). Keywords: carbon, mangrove, Musi river estuary
Salah satu upaya dalam mendukung pengembangan wilayah pesisir adalah melalui pengelolaan ekosistem mangrove. Sumber daya mangrove selain berperan dalam pengembangan ekonomi masyarakat pesisir juga memiliki peranan dalam mitigasi emisi karbon. Penelitian ini bertujuan memberikan gambaran tentang persepsi dan partisipasi masyarakat dan posisi stakeholder dalam pengelolaan lingkungan mangrove di muara Sungai Musi. Penelitian dilakukan di muara Sungai Musi, Kabupaten Banyuasin, Provinsi Sumatera Selatan. Data persepsi dan identifikasi stakeholder didapatkan melalui wawancara responden. Hasil menunjukkan bahwa >90% masyarakat mengetahui keberadaan dan fungsi mangrove dan setuju berpartisipasi pada berbagai kebijakan pengelolaan mangrove. Diperlukan suatu upaya agar semua stakeholder menjadi key player dalam pengelolaan mangrove sebagai cadangan karbon di muara Sungai Musi. Rekomendasi pengelolaan untuk peningkatan cadangan karbon diantaranya adalah pemberdayaan dan peningkatan pengetahuan masyarakat sekitar, rehabilitasi hutan dan lahan, pengembangan teknik budidaya agroforestri, pengembangan hasil hutan non kayu dan konservasi tanah dan air.
Mangrove snails are aquatic biota that inhabit in the mangrove ecosystem, they lives attached to mangrove trees or scattered on the substrate surface. The purposes of this study were to identify the species, distribution pattern, the abundance of mangrove snails (Cerithidea sp.) and their correlation with mangrove density, water and soil characteristics in mangrove ecosystem, Banda Aceh and Aceh Besar. The research sampling was started in April to May 2022. The samples were collected from 5 stations, and purposive sampling method was applied in order to select the sampling station. The results discovered that the species of Cerithidea was Cerithidea cingulate, and the highest abundance was 18 individuals/m2 (station 1). Moreover, the lowest abundance was at station 5 as many as 10 individuals/m2, and other stations showed the abundance of C. cingulata was 15.67 individuals/m2 (station 2), 14.67 individuals/m2 (station 4), and 13 individuals/m2 (station 3) respectively, with a uniform distribution pattern at each station. There was no significantly correlation between mangrove density and the abundance of mangrove snails as well as the relationship between the abundance of mangrove snails with the characteristics of water and soil where PSig. > 0.05.
Blue carbon is a term to underline coastal ecosystem such as mangrove, seagrass, and tidal marshes capability as carbon sequestration where the organic carbon that stored in coastal sediment is greater than the organic carbon in living biomass. This study analysed the variability of sediment carbon stock in seagrass ecosystem in Central Tapanuli, Indonesia. LOI method was used to determine the carbon stock. Regression analysis showed that depth, and dry bulk density strongly influence the sedimen carbon stock in seagrass ecosystem (R2 = 0.77 in Hajoran and R2 = 0.79 in Jago-jago) where the total organic carbon stock in upper layer and denser sediment was higher than the organic carbon stock in middle/bottom layer sediment. Moreover, sediment type also influenced the carbon stock where sediment with finer grain size (11.80 – 13.46 Mg C/ha) captured more organic carbon than sand (6.54 – 10.34 Mg C/ha). By knowing this capacity, monitoring and maintaining coastal sediment and vegetation should become priority to mitigate the climate change.
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