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INDONESIA
Jurnal Belantara
Published by Universitas Mataram
ISSN : 26147238     EISSN : 26143453     DOI : -
Core Subject : Education, Social,
Education Environmental Science
Jurnal Belantara (JBL) is a National Scientific Journal for academics, practitioners, and Bureaucracy in encouraging equitable management of natural resources and sustainable. Jurnal Belantara is a periodic journal published twice a year by the Forestry Studies Program of Mataram University with a focus on forestry and the environment.
Arjuna Subject : -
Articles 206 Documents
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HEALTH STATUS AND DAMAGE CHARACTERISTICS OF Canarium indicum IN BOGOR GREEN SPACES Sandy Andika; Tsarwan Thirafi Tsasy; Fachri Rafi Prayoga; Inggar Damayanti; Peniwidiyanti Peniwidiyanti; Prima Anggoro
Jurnal Belantara Vol 9 No 2 (2026)
Publisher : Forestry Study Program University Of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbl.v9i2.1234

Abstract

Although Canarium indicum is widely planted as a shade and heritage tree in Bogor City, information regarding its health condition and damage characteristics in urban environments remains limited. Assessing tree health is essential for supporting sustainable urban forest management and maintaining the ecological functions of urban green spaces. This study aimed to evaluate the health condition of Canarium indicum L. growing in urban green spaces in Bogor City, Indonesia. Tree health was evaluated using a modified Forest Health Monitoring (FHM) approach by measuring diameter at breast height (DBH), basal area, damage location, damage type, and damage severity. Tree health status was quantified using the Damage Index (DI), Tree Level Index (TLI), and Plot Level Index (PLI). The results showed that most trees were classified as lightly damaged, accounting for 66.67%, 85.72%, and 84.62% of assessed trees in Ahmad Yani Urban Forest, Ahmad Yani Street, and Sudirman Street, respectively. PLI values ranged from 8.35 to 9.60 among study sites. Damage was primarily concentrated in the lower stem (22.22%), upper stem (18.52%), and root–stem transition zone (15.56%). These findings indicate that the observed defects were mainly associated with structural components and biological agents commonly found in mature urban trees. Despite the presence of various defects, the overall health condition of C. indicum trees remained generally favourable. The study demonstrates that the FHM approach provides useful information for evaluating urban tree health and can support monitoring and preventive management strategies to maintain the ecological and environmental functions of urban trees in Bogor City.
SOIL CARBON DYNAMICS AND PHYSICAL CHARACTERISTICS IN DIFFERENT COFFEE AGROECOSYSTEMS Nur Ulina Warnisyah Sebayang; Putri Chandra Ayu; Rahmawaty; Sendi Puspa Sari; Mohd Hasmadi Ismail
Jurnal Belantara Vol 9 No 2 (2026)
Publisher : Forestry Study Program University Of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbl.v9i2.1238

Abstract

Coffee management systems strongly influence soil carbon dynamics and soil physical quality in tropical agroecosystems. This study aimed to evaluate soil carbon dynamics and selected soil physical characteristics under organic (ORG), semi-organic (SEM), and conventional (CON) coffee management systems at soil depths of 0–10, 10–20, 20–30, and 30–40 cm. Observed parameters included total organic carbon (TOC), carbon sequestration, bulk density, and aggregate stability. The results showed that ORG consistently exhibited the highest TOC values, particularly at the 0–10 cm depth (3.21%), followed by SEM (2.74%) and CON (2.18%). Soil carbon sequestration under ORG was approximately 24% greater than CON, indicating improved carbon storage potential under continuous organic matter inputs. Aggregate stability was also higher under ORG across all aggregate size fractions, especially within the 63 µm fraction, while CON exhibited lower aggregate stability and greater bulk density, indicating higher soil compaction. TOC values gradually decreased with increasing soil depth across all management systems, reflecting reduced organic matter inputs in subsurface soils. Overall, organic coffee management with continuous organic amendments and minimal soil disturbance improved soil carbon storage and enhanced soil physical quality.
AGROFORESTRY OF DRAGON FRUIT IN BUMI MULYO VILLAGE, EAST LAMPUNG REGENCY Andhine Tri Prinanti; Indra Gumay Febryano; Hari Kaskoyo
Jurnal Belantara Vol 9 No 2 (2026)
Publisher : Forestry Study Program University Of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbl.v9i2.1240

Abstract

The development of dragon fruit through agroforestry plays an important role because it increases land cover, suppresses pests and diseases, and reduces capital costs compared to monoculture systems. This study aims to analyze the dragon fruit agroforestry systems developed in Bumi Mulyo Village, Sekampung Udik District, East Lampung Regency. A qualitative approach using a case study method was employed in this research. Data were collected through in-depth interviews, field observations, and document analysis. The collected data were analyzed to identify plant species and planting patterns in dragon fruit agroforestry systems. The results showed that the agroforestry system consisted of dragon fruit (Hylocereus polyrhizus) as the main crop; kapuk (Ceiba pentandra) as a living support tree and live fence tree; and several complementary plant species, namely avocado (Persea americana), cocoa (Theobroma cacao), mamey sapote (Pouteria sapota), black sapote (Diospyros nigra), durian (Durio zibethinus), papaya (Carica papaya), chili (Capsicum annuum), banana (Musa spp.), melinjo (Gnetum gnemon), and coconut (Cocos nucifera). The kapuk tree functions both as a living support tree for dragon fruit and as a live fence tree. Its leaves are also used by farmers as animal feed. The planting patterns applied by farmers include: (1) dragon fruit–kapuk; (2) dragon fruit–kapuk–avocado; and (3) dragon fruit–kapuk–fruit trees. These variations demonstrate farmers' adaptation in optimizing growing space to maximize the economic and ecological functions of the agroforestry system. Farmers are encouraged to develop more complex agroforestry systems from simple ones in order to increase income and support soil and water conservation.
PREDICTING EDELWEISS (Anaphalis javanica) HABITAT SUITABILITY UNDER CLIMATE SCENARIOS: MACHINE LEARNING APPROACHES Miftahul Irsyadi Purnama; Lutfia Azizah; Nuraqilla Waidha Bintang Grendis; Muhamad Zulkurniawan; M. Dani Afrian; Hüseyin Oğuz ÇOBAN
Jurnal Belantara Vol 9 No 2 (2026)
Publisher : Forestry Study Program University Of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbl.v9i2.1247

Abstract

Climate change threatens species distribution by altering environmental conditions, posing severe risks to high-elevation endemic plants like Anaphalis javanica (Javan Edelweiss). Research on the performance of machine learning models in predicting the habitat suitability of Anaphalis javanica under various climate scenarios is crucial for generating accurate scientific information to support conservation efforts, given that climate change has the potential to affect the future distribution and mortality of this species. This study evaluated current and future habitat suitability for A. javanica across Java, Bali, and Nusa Tenggara using Decision Tree (DT), Random Forest (RF), and Maximum Entropy (MaxEnt) models. Species occurrence records were compiled from GBIF and published literature, while topographic, edaphic, climatic, and bioclimatic predictors. Model evaluation relied on Accuracy, Precision, Recall, F1-score, Cohen’s Kappa, and AUC. All models demonstrated outstanding predictive performance (accuracy: 0.953–0.974; AUC: 0.976–0.999), with Random Forest achieving the highest performance (accuracy: 0.974; Kappa: 0.947; AUC: 0.999). Soil type, elevation, temperature, and precipitation emerged as primary determinants. Currently, highly suitable habitats are concentrated in montane regions. However, projections for 2080 under RCP 2.6 and RCP 8.5 scenarios indicate a progressive decline in habitat suitability, most severely under RCP 8.5. These findings highlight that climate change will shrink suitable habitats and confine A. javanica to high-elevation climate refugia, underscoring the urgency of targeted conservation strategies.
ECTOMYCORRHIZAL COLONIZATION AND GROWTH OF Anthoshorea javanica UNDER SOIL AMELIORANT TREATMENTS Melya Riniarti
Jurnal Belantara Vol 9 No 2 (2026)
Publisher : Forestry Study Program University Of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbl.v9i2.1248

Abstract

Anthoshorea javanica (sin. Shorea javanica) is an ectomycorrhiza-dependent Dipterocarpaceae species whose successful nursery establishment relies on the rapid formation of functional ectomycorrhizal symbiosis. Although the Scleroderma spore inoculum is practical for large-scale nursery application, delayed spore germination may limit early seedling growth. Previous studies have mainly evaluated ectomycorrhizal species or inoculum dosage, whereas the interaction between spore-based ectomycorrhizal inoculation and soil ameliorants remains poorly understood. This study aimed to evaluate the effects of soil ameliorants on ectomycorrhizal colonization and growth of A. javanica seedlings inoculated with Scleroderma dictyosporum and Scleroderma columnare. A factorial completely randomized design was employed using two ectomycorrhizal species and three soil ameliorant treatments (control, humic acid, and Bio-Nature 50), with six replications per treatment. Growth variables and ectomycorrhizal colonization were analyzed using two-way ANOVA followed by Fisher's LSD test (P < 0.05). The interaction between ectomycorrhizal species and soil ameliorants significantly affected leaf area and shoot dry weight. The combination of S. dictyosporum and Bio-Nature 50 produced the highest leaf area (33.24 cm²) and shoot dry weight (1.80 g). Ectomycorrhizal colonization remained consistently high (79.23–91.59%) across all treatments, with no significant differences, while anatomical observations confirmed successful symbiosis through the formation of mantle and Hartig net structures. These findings demonstrate that Bio-Nature 50 enhances seedling growth responses when combined with compatible Scleroderma species without altering colonization levels. This information provides a practical basis for selecting combinations of soil ameliorants and ectomycorrhizal inoculum to improve the production of high-quality A. javanica seedlings in forest nurseries.
SUSTAINABILITY ASSESSMENT OF SOCIAL FORESTRY IN THE SAGENA INDAH FOREST FARMERS GROUP Hayatus Sa'adiah; Markum; Andi Chairil Ichsan
Jurnal Belantara Vol 9 No 2 (2026)
Publisher : Forestry Study Program University Of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbl.v9i2.1253

Abstract

Social Forestry (SF) under the Community Forestry (Hutan Kemasyarakatan/HKm) scheme promotes community-based forest management, whose sustainability largely depends on institutional capacity and forest management performance. This study aimed to evaluate the sustainability status of Social Forestry implementation in the Sagena Indah Forest Farmers Group (Kelompok Tani Hutan/KTH Sagena Indah), Kiantar Village, West Sumbawa Regency, Indonesia, using the Multi-Aspect Sustainability Analysis (MSA) framework. The assessment integrated Institutional Management and Area Management dimensions based on regulatory-derived sustainability attributes. Data were collected through field observations, document verification, and structured interviews with twelve purposively selected key persons representing four stakeholder groups. The MSA analysis was conducted using sustainability indexing, leverage analysis, future condition assessment, Monte Carlo simulation, and Random Iteration analysis. The results showed that KTH Sagena Indah achieved a Sustainable status, although sustainability performance differed between management components, with Area Management performing better than Institutional Management. The findings indicate that Social Forestry sustainability is shaped by the interaction between governance capacity, community participation, and forest management practices. Based on the findings, sustainability improvement should focus on strengthening priority attributes within Institutional Management and Area Management to achieve more balanced and sustainable Social Forestry implementation.

Page 21 of 21 | Total Record : 206

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