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<p>Ethiopia’s Green Legacy Initiative (GLI) is one of the world’s largest landscape restoration programs, yet its contribution to carbon sequestration across diverse land uses and agroecological zones remains poorly quantified. This study assessed the effects of GLI interventions on biomass accumulation, carbon storage (CS), and carbon dioxide equivalent (CO₂e) sequestration across 21 districts representing major implementation regions of Ethiopia. A total of 8,209 plants belonging to 90 species and 42 families were measured across four land-use types and eight management practices. Aboveground biomass, carbon stock, and CO₂e sequestration were estimated using species-appropriate allometric equations. Agroforestry systems exhibited the highest mean carbon storage (133.74 Mg ha⁻¹) and CO₂e sequestration (490.81 Mg ha⁻¹), highlighting their importance for climate-change mitigation. At the species level, <i>Afrocarpus falcatus</i> showed the greatest carbon sequestration potential, storing approximately 308 Mg C ha⁻¹ and 1,131 Mg CO₂e ha⁻¹. Carbon sequestration was strongly associated with diameter at breast height (DBH; R² = 0.94), indicating that vegetation structure is a key determinant of biomass accumulation. Native species generally outperformed exotic species in carbon storage. Redundancy analysis revealed that species composition explained 56% of the variation in forest structure and carbon storage, whereas region, land-use type, and management practices collectively explained only 6%. These findings demonstrate that GLI is generating measurable climate-mitigation benefits and underscore the importance of prioritizing native, high-biomass species within diversified agroforestry and restoration systems to maximize long-term carbon sequestration and ecosystem resilience.</p>

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Ethiopia’s green legacy initiative enhances carbon stock and carbon dioxide sequestration across diverse landscapes

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月14日

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  • Dejene K. Mengistu,
  • Hailu Terefe,
  • Basazen F. Lakew,
  • Abiyou Tilahun,
  • Bogale N. Hailemariam

摘要

Ethiopia’s Green Legacy Initiative (GLI) is one of the world’s largest landscape restoration programs, yet its contribution to carbon sequestration across diverse land uses and agroecological zones remains poorly quantified. This study assessed the effects of GLI interventions on biomass accumulation, carbon storage (CS), and carbon dioxide equivalent (CO₂e) sequestration across 21 districts representing major implementation regions of Ethiopia. A total of 8,209 plants belonging to 90 species and 42 families were measured across four land-use types and eight management practices. Aboveground biomass, carbon stock, and CO₂e sequestration were estimated using species-appropriate allometric equations. Agroforestry systems exhibited the highest mean carbon storage (133.74 Mg ha⁻¹) and CO₂e sequestration (490.81 Mg ha⁻¹), highlighting their importance for climate-change mitigation. At the species level, Afrocarpus falcatus showed the greatest carbon sequestration potential, storing approximately 308 Mg C ha⁻¹ and 1,131 Mg CO₂e ha⁻¹. Carbon sequestration was strongly associated with diameter at breast height (DBH; R² = 0.94), indicating that vegetation structure is a key determinant of biomass accumulation. Native species generally outperformed exotic species in carbon storage. Redundancy analysis revealed that species composition explained 56% of the variation in forest structure and carbon storage, whereas region, land-use type, and management practices collectively explained only 6%. These findings demonstrate that GLI is generating measurable climate-mitigation benefits and underscore the importance of prioritizing native, high-biomass species within diversified agroforestry and restoration systems to maximize long-term carbon sequestration and ecosystem resilience.