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All Journal Jurnal Penelitian Kehutanan Wallacea
Putra, Putu Supadma
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Agriculture, Biological Sciences & Forestry

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Factors Behind Cessation of Illegal Logging by Local Communities for Valuable Timber-producing Endemic Species, Hopea celebica Ngakan, Putu Oka; Nasri, Nasri; Putra, Putu Supadma; Syahdar, Fardi Ali; Koesharyadi, Arif
Jurnal Penelitian Kehutanan Wallacea Vol. 13 No. 2 (2024)
Publisher : Foresty Faculty of Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24259/jpkwallacea.v13i2.37315

Abstract

Hopea celebica is a species of Dipterocarpaceae that produces strong and durable wood. This species is endemic to Sulawesi Island, where its spread is restricted to specific habitat types in the southern part of the island. The high quality of the wood has exposed this species to high levels of illegal logging and is endangered. However, in the last two decades, the threat of logging to this tree species has ceased to occur. Through field surveys and interviewing of respondents in 6 small FGDs, this study aims to determine the factors behind the cessation of illegal logging activities. We found that this species has good regeneration ability and identified 3 leading causes of stopping illegal logging of H. celebica: restricting its habitat to the Bantimurung Bulusaraung National Park, the change in cultural interest from building houses on stilts to concrete houses, and the shift in the lifestyle of young generation who are no longer interested in working as woodcutters. Thus, the cessation of illegal logging of H. celebica is not due to the correct public perception of the importance of conserving H. celebica to increase its population so that it can be used sustainably in the future. The Bantimurung Bulusaraung National Park still needs to make people aware of the importance of H. celebica conservation.
The Potential of Native Tree Species for Post-Nickel Mining Land Restoration Suhati, Fadly; Ngakan, Putu Oka; Maulany, Risma Illa; Nasri, Nasri; Hamzah, Andi Siady; Putra, Putu Supadma
Jurnal Penelitian Kehutanan Wallacea Vol. 14 No. 1 (2025)
Publisher : Foresty Faculty of Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24259/jpkwallacea.v14i1.44192

Abstract

Due to the absence of topsoil, low pH, and contamination by various heavy metals, revegetation of post-nickel mining land, which is generally carried out by planting economically valuable species, is usually unsuccessful. This study aims to identify tree species suitable for revegetation on post-nickel mining land in Kolaka Regency, Indonesia. Nine plots measuring 20 m x 20 m were distributed in the revegetated post-nickel mining land at three different age categories (1, 5, and 10 years) to observe the growth of revegetation trees, which are introduced species and native tree species that naturally invade the revegetation area. In total, there were 24 tree species found in the revegetated post-nickel mining land consisting of 9 introduced revegetation species and the other 15 tree species were native tree species that invaded the revegetated area. The older the age of the revegetation, the more native plant species are found. In line with the increasing age of revegetation, the density of revegetation plants decreases while the density of native plants increases. The population structure of revegetation trees does not indicate that the species can regenerate, while the inverted shape of the population structure of native plants indicates excellent regeneration potential. Thus, the results of this study recommend making native species, including Buchanania arborescens, Alstonia macrophylla, Ficus sp. Syzygium sp. Colona scabra, Litsea sp., and Metrosideros cf. petiolata as revegetation plants in former nickel mining areas.
Co-Authors Hamzah, Andi Siady Koesharyadi, Arif Nasri Nasri, Nasri Putu Oka Ngakan Risma Illa Maulany Suhati, Fadly Syahdar, Fardi Ali