Community-based collaborative watershed governance offers a potential solution to the limitations of government-led management by leveraging substantial social capital to sustain watershed functions. Therefore, this research aimed to investigate community social capital in watershed conservation and formulate strategies to strengthen it, promoting the sustainability of Poso Watershed. The investigation was conducted in Tentena and Sawidago Villages in Poso Watershed, using interviews with households and key informants, focus group discussions, and field observations. This research employed descriptive quantitative analysis to assess community social capital characteristics and levels, while applying SWOT (strengths, weaknesses, opportunities, and threats) analysis to develop strategies for strengthening social capital. The results showed that high cognitive-social capital required substantial structural social capital to generate collective action in watershed conservation. Weak structural social capital was reflected in the community’s limited understanding of formal rules and low involvement in organizations related to forest and watershed conservation, leading to weak solidarity and collective action. Strengthening social capital required harnessing the role of the Watershed Management Coordination Forum, which engages government and stakeholders in community-based collaborative watershed management. This primary strategy should be supported by improving communication, socialization, counselling, increasing community participation, and fostering the role of local institutions in watershed conservation.

Deforestation from monoculture farming significantly contributes to greenhouse gas emissions and ecosystem degradation, highlighting the need for sustainable land management. Agroforestry presents a viable solution for enhancing carbon sequestration. However, many project models rely on assumptions or secondary data, leading to limited accuracy. This research aimed to enhance projections of carbon stock changes by utilizing empirical data from a 12.7-ha tea plantation in West Java, Indonesia. This research established baseline carbon stocks through direct field measurements in a monoculture scenario. Agroforestry interventions involved hardwood species, such as Toona sureni, Altingia excelsa, and Manglietia glauca, in conjunction with coffee crops. Carbon stock accumulation was then projected over ten years using allometric equations and annual growth increments derived from field observations. Results indicated that agroforestry increased carbon sequestration by threefold compared to monoculture, reaching 472.77 t CO2eq/ha by 2032. The findings demonstrated that empirical data-driven modeling resulted in more realistic and reliable projections, enhanced the accuracy of carbon stock predictions, and established agroforestry as a sustainable approach for mitigating climate change.

Drummer Rail (Habroptila wallacii) is a bird species of the Rallidae family with limited ecology and behavior information. The information on the distribution of H. wallacii in Halmahera Island is crucial as it is classified as a vulnerable species. Therefore, this research aims to predict the potential distribution of H. wallacii on Halmahera Island using the Maximum Entropy (MaxEnt) modeling method, which projects species distributions based on presence data and environmental variables. A total of 47 data points on H. wallacii encounters were obtained from open-access data sources and field observation. The variables used were land use land cover (LULC), normalized difference vegetation index (NDVI), elevation, slope, and proximity data (river). The results showed that 33.52% of the area was very suitable for H. wallacii habitat, 32.97% was suitable, and 33.50% was unsuitable. Approximately 29.39% of the suitable habitat was located in limited-production forest areas, while conservation areas covered only 5.19%. These results suggested the need to review spatial planning policies to increase protection of the natural habitat of the species. The results could serve as considerations and recommendations for the Ministry of Environment and Forestry regarding the future management of forest areas for these species.

Way Kambas National Park (WKNP) in Lampung serves as a critical habitat for the endangered Sumatran elephant (Elephas maximus sumatranus). However, the area has increasingly experienced human-elephant conflicts, particularly at the Rawa Bunder Resort. This research aimed to assess the biophysical characteristics and map the distribution of potential elephant habitats within the resort area. Field data were collected using 70 nested plots distributed along established transects and analyzed through a modified sampling protocol. An Agglomerative Hierarchical Cluster (AHC) analysis was employed to classify the habitats into suitable, moderately suitable, and less suitable categories. The georeferenced plot data were processed using ArcGIS 9.3 to create a habitat suitability map. The findings indicated that 24% of the plots were classified as suitable, 33% as moderately suitable, and 43% as less suitable. The suitable habitats were predominantly located in lowland forest areas, which represent a relatively small proportion of the total area. To expand suitable habitats and mitigate human-elephant conflicts, strategic habitat management measures, such as forest restoration and targeted enrichment, are essential. These results provide a spatial framework for conservation planning for elephant habitats in Way Kambas and other fragmented landscapes.

The research aimed to investigate the impact of storage duration (20 years versus less than one year) on the quantity of mycorrhizal spores and propagules within zeolite carrier media, using sorghum as the host plant. Spores were quantified through a sieving method and subsequent microscopic observation, while the numbers of propagules were determined through serial dilution down to 10-7. Following this, sorghum was cultivated, and root infection was evaluated. The findings indicated that mycorrhizae stored for less than one year yielded 416 spores/10 g and 620,000 propagules/g, compared to 259 spores/10 g and 170,000 propagules/g for those stored for twenty years. The identified spore types in both age groups included Acaulospora spp. 1, Acaulospora spp. 2, Glomus grape, and Glomus manihotis. This result suggested that the storage of mycorrhizae should be limited to less than one year to preserve a high number of spores and propagules.

The Dayak Kuhin community, native to Central Kalimantan Province, had a traditional agricultural culture called nugal, which was carried out once a year. Nugal was considered an agricultural culture that involved opening fields in the forest, but it was often associated with causing forest fires. To clarify the realities of the practice, this research aimed to explore the nugal process and associated forest conservation efforts by taking a case study of the Sapundu Hantu Village, Seruyan Hulu District, Seruyan Regency, Central Kalimantan Province. This research employed an ethnographic method and a thick description approach, utilizing qualitative data collected through participatory observation, in-depth interviews, archival records, and literature reviews. The results revealed that the nugal agriculture embodied rich local knowledge about forest conservation efforts reflected in each process. The community practiced the nugal agriculture carefully with adherence to customary norms that regulated forest management. The findings of this study address the prevailing negative stigma associated with the nugal culture as practiced by the Dayak Kuhin community.

Article: Jurnal Ilmu Kehutanan, 19(1) 2025, pp. 92-101 (10.22146/jik.v19i1.19038) Title: Chemical compound Analysis of Syzygium myrtifolium Essential Oil and Molecular Docking Analysis on Phenylalanine Hydroxylase Enzyme Author: Zikri Hamidi According to the author’s proposal, the editorial of the Jurnal Ilmu Kehutanan withdraws the paper. 26 June 2025

The Government of Indonesia introduced a Special Management Forest Areas policy to facilitate changes in forest governance in Java, particularly over approximately 1.1 million hectares of forestland that were previously under Perhutani's management. Therefore, this research aimed to examine the practical benefit of the policies for communities critically. The designation of forest communities as key stakeholders paradoxically risked further marginalization. This research applied a patchwork ethnography approach and relied on participant observation and in-depth interviews. Although Perhutani no longer held official authority, various strategies were implemented at site levels to maintain access to forest resources. During the transition period, forest communities struggled due to a lack of clear assistance. As a new actor, the Forestry Service Branch (CDK) could not provide intensive assistance because the communities had not yet undergone the transformation required to obtain legal recognition under the latest policies. The results showed that good intentions in policies to support marginalized communities were insufficient. For the purpose of justice, a strong commitment at the grassroots level was needed through intensive assistance to ensure that policies were not merely rhetorical but truly provided tangible benefits.

The emission of CO2 is increasing due to the high population and standard of living, particularly from the energy sector. Renewable energy from forest resources, such as fuelwood, can contribute to these emissions' reduction. Therefore, this research aimed to generate a growth model to determine the harvesting cycle of Gliricidia sepium as a source of raw material for bioenergy. The model generation employed regression technique and used stand inventory data. The growth model for Gliricidia sepium was Y = 157.46e (-3.342/A), where age (A) was the independent variable. The optimum harvest occurred at 4 years with a biomass production potential of 68.28 tons/ha. This research provided valuable information for decision-making in managing the industrial forest plantation of Gliricidia sepium for bioenergy.