Electronic Theses and Dissertation

Telah dilakukan penelitian tentang estimasi stok karbon pada vegetasi mangrove jenis Rhizophora mucronata di Gampong Pande, Kecamatan Kuta Raja, Kota Banda Aceh pada bulan Januari-Februari 2025. Penelitian ini bertujuan untuk menganalisis simpanan karbon biomassa pada vegetasi yang meliputi kategori pohon, anakan, dan semai dan karbon organik tanah mangrove jenis Rhizophora mucronata. Penelitian dilakukan menggunakan metode purposive sampling dengan tiga stasiun berbeda berdasarkan tingkat kerapatan vegetasi: jarang, sedang, dan padat. Pengambilan data dilakukan secara non-destruktif menggunakan transek kuadrat dan perhitungan biomassa menggunakan persamaan allometrik spesifik. Pengukuran karbon tanah dilakukan menggunakan metode Loss on Ignition (LOI) dan penghitungan bulk density. Hasil penelitian menunjukkan bahwa biomassa pohon tertinggi terdapat pada stasiun padat dengan total biomassa 78.5 ton/ha dan kandungan karbon sebesar 36.895 ton/ha. Sebaliknya, stok karbon tanah tertinggi ditemukan di stasiun jarang sebesar 69.3 ton/ha. Hasil ini menunjukkan bahwa meskipun biomassa vegetasi lebih tinggi pada lokasi dengan kerapatan tinggi, karbon organik tanah lebih banyak tersimpan pada lokasi dengan kerapatan vegetasi rendah. Studi ini menyimpulkan bahwa kondisi kerapatan vegetasi berpengaruh terhadap distribusi stok karbon, baik pada biomassa vegetasi maupun karbon tanah, dan keduanya perlu dianalisis secara bersamaan untuk memperoleh estimasi cadangan karbon yang lebih akurat di ekosistem mangrove.

Kata kunci: Rhizophora mucronata, mangrove, karbon biomassa, karbon tanah, allometrik, Gampong Pande.

A study was conducted to estimate the carbon stock of Rhizophora mucronata mangrove vegetation in Gampong Pande, Kuta Raja District, Banda Aceh City, during January–February 2025. The aim of this research was to analyze the carbon storage in vegetation biomass, including tree, sapling, and seedling categories, as well as the soil organic carbon of Rhizophora mucronata mangrove ecosystems. The study employed a purposive sampling method across three stations representing different vegetation densities: sparse, moderate, and dense. Data collection was carried out non-destructively using the quadrat transect, and biomass was estimated using species-specific allometric equations. Soil carbon was measured using the Loss on Ignition (LOI) method and bulk density analysis. The results showed that the highest biomass occurred at the dense vegetation station, with a total biomass of 78.5 tons/ha and carbon content of 36.895 tons/ha. Conversely, the highest soil carbon stock was recorded at the sparse vegetation station, reaching 69.3 tons/ha. These findings indicate that while vegetation biomass increases with higher density, soil organic carbon tends to accumulate more in areas with lower vegetation density. This study concludes that vegetation density affects the distribution of carbon stocks in both biomass and soil, and that both components must be considered together to obtain accurate carbon stock estimates in mangrove ecosystems. Keywords: Rhizophora mucronata, mangrove, biomass carbon, soil carbon, allometric, Gampong Pande.