DAYA DUKUNG EKOLOGIS HUTAN PRODUKSI DESA AMOITO DALAM PENYIMPANAN KARBON DAN PENYERAPAN CO₂ : Ecological Carrying Capacity of the Amoito Village Production Forest for Carbon Storage and CO₂ Sequestration

Abstrak

This study aimed to analyze the ecological carrying capacity of the production forest in Amoito Village, Ranomeeto District, South Konawe Regency, based on vegetation structure, the Importance Value Index, species diversity, biomass, carbon stock, and potential CO₂ sequestration. The study was conducted in a 12-ha production forest area using a 7% sampling intensity, resulting in a total sample area of 0.84 ha. Data were collected from 21 observation plots measuring 20 × 20 m. Vegetation parameters were analyzed using density, frequency, dominance, Importance Value Index, and the Shannon-Wiener Diversity Index, while biomass was estimated using a non-destructive allometric equation. Carbon stock was calculated as 47% of total biomass, and CO₂ sequestration was estimated using a conversion factor of 3.67. The results showed that the ecological carrying capacity of the Amoito Village production forest was low, as indicated by a total Shannon-Wiener diversity index of 0.450. The vegetation community was dominated by Castanopsis buruana, which had the highest Importance Value Index of 63.31 and the highest H’ contribution of 0.2212. Total vegetation biomass reached 453.33 ton ha⁻¹, with a carbon stock of 213.06 ton C ha⁻¹ and potential CO₂ sequestration of 781.94 ton CO₂ ha⁻¹. The highest biomass was recorded in Manilkara merrilliana, reaching 151.87 ton ha⁻¹. Nonlinear regression analysis showed a very weak relationship between species diversity and biomass, with an R² value of 0.0146, which decreased to 0.0071 after outlier removal. These findings indicate that biomass and carbon storage in the study area were more strongly influenced by stand structure, tree size, vegetation density, and the dominance of large trees than by species diversity alone

Kata kunci

• Biomass
• CO₂ sequestration
• carbon stock
• ecological carrying capacity
• production forest