Year: 2025 | Month: December | Volume: 12 | Issue: 12 | Pages: 907-919
DOI: https://doi.org/10.52403/ijrr.20251291
Biodiversity and Carbon Stock as Indicators of Mine Reclamation Success at PT Indocement Tunggal Prakarsa, Tarjun, South Kalimantan, Indonesia
Wisnu Adi Patria11, Eva Ariani1, I Wayan Kedep Sudiarta1, M Indra Zulkarnaen Cangara1, Rizal Anshari2, Hafizianor3, Masrun3, Susilawati3, Yasinta Nur Shiba3, Halimul Karim3
1Indocement Tunggal Prakarsa Tbk Unit Tarjun, Kotabaru Regency, South Kalimantan, Indonesia
2Hazza Bhanoa Consultant, Banjarbaru City, South Kalimantan, Indonesia
3Study Program of Forestry, Faculty of Forestry, Lambung Mangkurat University, South Kalimantan, Indonesia
Corresponding Author: Susilawati
ABSTRACT
This study evaluated the success of post-mining reclamation at PT Indocement Tunggal Prakarsa Tbk., Tarjun Unit, South Kalimantan, Indonesia, using biodiversity (flora and fauna) and carbon stocks as environmental performance indicators aligned with the Green PROPER criteria (PROPER Hijau). We assessed four reclaimed land types—limestone, clay, laterite, and silica—using stratified plot analysis for vegetation, and line-transect plus point-count methods for fauna. Above-ground biomass and carbon stocks were estimated with Brown’s (1997) allometric model, applying a carbon fraction of 0.47. Results show significant ecological recovery across all reclaimed areas, indicated by increased vegetation cover, multilayered stand structure, and the presence of indicator species. Laterite plots stored the highest carbon (56.47 t ha⁻¹) and exhibited the greatest plant diversity (H′ = 2.69), whereas clay plots had the lowest carbon stock (0.67 t ha⁻¹; H′ = 1.02). We recorded 41 bird species, 6 mammals, and 5 herpetofauna species, with an overall fauna diversity index of H′ = 2.21 (moderate–high). Total biodiversity (flora + fauna) correlated positively with carbon stocks (r = 0.82), indicating that increasing ecosystem complexity parallels greater carbon sequestration capacity. Overall, reclamation at PT Indocement has effectively restored ecosystem functions and supported climate-change mitigation, consistent with Green PROPER parameters, particularly those related to biodiversity, land rehabilitation, and sustainable carbon management.
Keywords: post-mining reclamation; plant diversity; faunal diversity; carbon stocks; green PROPER; PT Indocement Tarjun
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