Meningkatnya kandungan karbon dioksida (CO2) di udara akan menyebabkan kenaikan suhu bumi karena efek rumah kaca/pemanasan global. Penelitian ini bertujuan untuk mengetahui kerapatan vegetasi jenis tegakan mangrove, total biomassa atas permukaan dan bawah permukaan, mengetahui stok karbon atas permukaan, bawah permukaan dan stok karbon tanah dan mengetahui serapan CO2 atas permukaan, bawah permukaan dan stok karbon tanah pada kawasan hutan mangrove di Desa Lembung Paseser. Pengambilan data stok karbon mengunakan metode non-destruktif sampling yaitu tanpa merusak dengan menggunakan model persamaan allometrik. Penelitian ini dilakukan pada 3 stasiun dan setiap stasiun tardapat 6 plot. Hasil penelitian menunjukkan pada kawasan penelitian ditemukan 9 jenis mangrove yaitu Rhizophora mucronata, Rhizophora stylosa, Rhizophora apiculata, Sonneratia alba, Avicennia marina, Avicennia alba, Ceriop tagal, Ceriop decandra, Aegiceras c. Total kerapatan jenis mangrove pohon sebesar 2.900 ind/ha, pada anakan 206.400 ind/ha dan tingkat semai 3.480.000 ind/ha. Nilai rata-rata kandungan biomassa di atas permukaan sebesar 87,21 ton/ha, bawah permukaan (akar) 36,07 ton/ha. Total rata-rata stok karbon sebesar 231,69 ton/ha, terdiri dari: stok karbon di atas permukaan 40,75 ton/ha, bawah permukaan 16,95 ton/ha dan tanah 173,98 ton/ha. Total rata-rata serapan CO2 mangrove sebesar 849,51 ton/ha, yaitu di atas permukaan 149,44 ton/ha, bawah permukaan 62,15 ton/ha, dan tanah 637,93 ton/ha. Kata kunci: Mangrove, Biomassa, Stok Karbon, Serapan CO2.

The increasing of carbon dioxide (CO2) in the air causes an increase in earth's temperature which occurs due to the greenhouse effect / global warming. This study aims to determine the vegetation density of mangrove stands, total surface and subsurface biomass, determine surface carbon stocks, subsurface and soil carbon stocks and determine CO2 uptake on the surface, subsurface and soil carbon stock in mangrove forest areas in the village. Damp Paseser. Retrieval of carbon stock data using non-destructive sampling method that is without damage by using the allometric equation model. This research was conducted at 3 stations and each station had 6 plots. The results showed that in the study area 9 species of mangrove were found, namely Rhizophora mucronata, Rhizophora stylosa, Rhizophora apiculata, Sonneratia alba, Avicennia marina, Avicennia alba, Ceriop tagal, Ceriop decandra, Aegiceras c. The total density of mangrove tree species is 2,900 ind / ha, in saplings 206,400 ind / ha and seedlings level 3,480,000 ind / ha. The average value of aboveground biomass content is 87.21 tons / ha, subsurface (roots) 36.07 tons / ha. The average total carbon stock of 231.69 tons / ha, consisting of: carbon stocks above the surface of 40.75 tons / ha, subsurface 16.95 tons / ha and land 173.98 tons / ha. The total average mangrove CO2 uptake was 849.51 tons / ha, ie above the surface of 149.44 tons / ha, subsurface 62.15 tons / ha, and land 637.93 tons / ha. Keywords: Mangroves, Biomass, Carbon Stock, CO2 Uptake