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Jurnal Sylva Lestari
Published by Universitas Lampung
ISSN : 23390913     EISSN : 25495747     DOI : https://doi.org/10.23960
Core Subject : Science, Agriculture, Social,
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Energy Environmental Science Materials Science & Nanotechnology
Jurnal Sylva Lestari (JSL) [P-ISSN 2339-0913 | E-ISSN 2549-5747] publishes original research articles related to all aspects of forestry and environmental sciences which includes, but not limited to the following topics: forest and natural resources management, biodiversity conservation and management, wood science and timber technology, agroforestry and social forestry, forest products and services, and socio-economics of natural resources. It is primarily a medium for disseminating original theoretical and experimental researches, as well as technical reviews. This journal issues one volume annually consist of three issues that delivered every January, May, and September.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Kehutanan
Articles 16 Documents
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Search results for , issue "Vol. 13 No. 3 (2025): September" : 16 Documents clear
Community Structure of Mangrove Species in Bagakay Trail Lagoon, Claver, Surigao del Norte, Philippines Bernales, Wegie; Guiritan, Faye Angela Dingding; Pecato, Crystal Jane Lopez; Mercado, Joel Andig; Tangonan, Jennifer Aquino; Calagui, Laurence Buque; Corbita, Victor Lobrigas
Jurnal Sylva Lestari Vol. 13 No. 3 (2025): September
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v13i3.1193

Abstract

Mangroves are highly valuable ecosystems that provide essential goods and services, including stabilizing coastlines, regulating water, supporting fisheries, and sequestering carbon. This study assessed the community structures of mangroves in Bagakay Trail Lagoon, Claver, Surigao del Norte. Four sampling stations with transect lines ranging from 150–200 m laid perpendicular to the shoreline were established. Additionally, five plots, each measuring 10 m × 10 m, were established at each station, with an interval of 20–30 m between plots. The mangrove leaf specimens were collected for proper identification of species. The study’s results identified thirteen mangrove species classified under nine families, all of which were categorized as least concern species based on the International Union for Conservation of Nature. The species diversity of the sampling area falls under very low diversity (H'=0.852), which may be attributed to anthropogenic activities and the recent typhoon Rai, which devastated the area. The most ecologically important species were Avicennia officinalis and Nypa fruticans, with high importance values suggesting their dominance and significant influence on the ecosystem. It is recommended that both government and non-government organizations implement site-specific conservation interventions to improve species diversity and ensure the sustainability of the mangrove ecosystem. Keywords: community structure, diversity indices, habitat assessment, mangroves, vegetation analysis
Antidiabetic Activities of Agarwood (Aquilaria malaccensis) Leaf Extracts via Enhanced Insulin Secretion in BRIN-BD11 Pancreatic Beta-Cells Prayogo, Yanico Hadi; Sari, Rita Kartika; Hamidi, Zikri; Syafii, Wasrin; Harlina, Eva; Prasetyo, Bayu Febram
Jurnal Sylva Lestari Vol. 13 No. 3 (2025): September
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v13i3.1197

Abstract

Agarwood leaves (Aquilaria malaccensis), a non-timber forest products, shows significant potential as a source of antidiabetic compounds. This study aims to evaluate the antidiabetic activity of agarwood leaves and their cytotoxicity on pancreatic beta-cells, as well as predict their compound bioactivity through an in silico approach. The leaves were extracted using ethanol, water, and a mixture of ethanol–water with the assistance of ultrasound irradiation. The extracts were then tested in vitro for their antidiabetic potential by assessing their ability to inhibit the alpha-glucosidase enzyme and their effect on insulin secretion, as well as their cytotoxicity on BRIN-BD11 pancreatic beta-cells. The phytocompounds in the extract were identified using liquid chromatography-mass spectrometry, and their binding behavior was studied by in silico molecular docking. Among the three, the ethanol–water extract showed the highest extraction yield. Cytotoxicity assays revealed that the ethanol–water extract was cytotoxic at high concentrations (1000 µg/mL), but safe at lower concentrations. The alpha-glucosidase inhibition was relatively weak. Nevertheless, the extracts significantly stimulated insulin secretion in BRIN-BD11 cells up to fivefold compared to untreated cells. In silico studies indicated that xanthone glycoside, flavonoid glycoside, and coumarin compounds exhibit strong binding affinities to multiple insulin-secretion-related proteins. These findings suggest that agarwood leaf extract, particularly ethanol–water extract, possesses promising antidiabetic activity through an insulinotropic mechanism. Keywords: agarwood, alpha-glucosidase, insulinotropic, molecular docking
Land Use Mapping of Areas with Intense Socio-Economic Activities using Integrated Unmanned Aerial Vehicle and Geographic Information System Utomo, As Ari Wahyu; Kamarudin, Norizah; Samdin, Zaiton; Razali, Sheriza Mohd; Ruzana Adibah
Jurnal Sylva Lestari Vol. 13 No. 3 (2025): September
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v13i3.1217

Abstract

Indonesia’s national park development faces a challenging task due to human activities that threaten territorial integrity and gradually degrade the ecosystem. In Aketajawe Lolobata National Park, local communities rely heavily on park resources, resulting in observable changes in land use and land cover. However, periodic monitoring is complicated by limitations in satellite imagery availability and processing, as well as associated time and cost, making it difficult to acquire accurate information on land use. To address this, the study utilized unmanned aerial vehicle imagery to identify and map areas with intense socio-economic activities within the conservation area, aiming to understand the socio-cultural dynamics that affect conservation efforts. The land use classification involved four stages: (1) Orthomosaic image processing, (2) Image interpretation, (3) Supervised classification, and (4) Accuracy assessment. This study produced high-resolution imagery of approximately 640.21 ha with a ground sampling distance of up to 2.89 cm/pixel, which improved the accuracy of land surface interpretation. Mapping was performed at a scale of 1 cm to 2 m. The primary land use was classified into five classes: forest (436.65 ha), agriculture (168.76 ha), water body (20.87 ha), bare land (12.84 ha), and built-up (1.09 ha). The corresponding kappa coefficients were 0.78, 0.66, 0.73, 0.7, and 0.79, respectively, indicating generally reliable agreement. The present findings demonstrate the reliability and accuracy of unmanned aerial vehicle technology as a valuable tool for forest managers to map land use in critical and sensitive areas, such as national parks.  As these platforms continue to evolve, this study presents a compelling case for their use in Indonesia’s national parks. It also highlights the study's limitations and the advantages of this technology, as well as its potential applications in national park management. Keywords: geographic information systems, land use, maximum likelihood classification, socio-economic, Unmanned Aerial Vehicle
Isolation, Characterization, and Identification of Cellulolytic Bacteria Colony from Forest and Landfill Environments in Iligan City, Philippines Sabado, Jessa Marie Buniel
Jurnal Sylva Lestari Vol. 13 No. 3 (2025): September
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v13i3.1238

Abstract

The global proliferation of landfills represents a significant environmental challenge, as the generation and accumulation of solid waste continue to increase at an accelerating rate each year. This study aimed to isolate and characterize cellulose-degrading bacteria from forests in Barangay Suarez and landfills in Barangay Bonbonon and Barangay Santiago, Iligan City. Soil samples were randomly collected, and bacterial isolation was performed through serial dilution and spread plating on nutrient agar supplemented with nystatin as an antifungal agent. Pure cultures of the isolated colonies were obtained by streak plating and screened for cellulose-degrading activity using cellulose agar. These isolates were then subjected to morphological and biochemical tests for characterization and identification. Results showed that 18.42% of bacterial isolates tested positive for cellulolytic activity. Based on the observed characteristics, five isolates were identified as Bacillus, four as Pseudomonas, two as Cellulomonas, and three as Arthrobacter. Cellulolytic degrading bacteria provide valuable information for future technological applications, particularly in utilizing biomass waste. A 16S rRNA test for the bacterial isolates is highly recommended, as it provides more detailed and precise characterization and identification of the strain at the species level. Keywords: biomass utilization, cellulolytic bacteria, cellulose-degrading, forest environment, landfill environment
Effectiveness of Forest and Land Fire Mitigation in South Sumatra: An Analytical Approach using Analytical Hierarchy Process and Importance Performance Analysis Novitasari; Monik, Della Tiara
Jurnal Sylva Lestari Vol. 13 No. 3 (2025): September
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v13i3.1247

Abstract

In Indonesia, forest and land fires remain a major environmental issue. In 2022, South Sumatra recorded 51,972 ha of burned land, accounting for 25% of the nationwide total. These incidents resulted in severe air pollution, health risks, economic losses, and environmental degradation, underscoring the urgency of mitigation. This research employs a mixed-methods approach, combining Kernel density analysis, the Analytical Hierarchy Process (AHP), and Importance Performance Analysis (IPA) to assess fire mitigation in South Sumatra. The results indicate that Ogan Komering Ilir, Ogan Ilir, Penukal Abab Lematang Ilir, Musi Rawas, and Prabumulih are the most fire-prone districts. Human activity was the dominant factor (0.80), particularly land clearing. The AHP analysis indicated that prevention is the highest priority (0.77), reflecting its cost-effectiveness and sustainability compared to suppression. The IPA emphasized three preventive measures as most effective: hotspot monitoring, water reservoirs, and canal blocks. Hotspot monitoring enables early detection and rapid response, reservoirs maintain soil moisture to reduce fire risk, and canal blocks restore peatland hydrology to limit large-scale burning. Suppression (0.14) ranked second, highlighting its necessity for a rapid response despite its lower effectiveness and higher cost. Management (0.09), although the lowest weighted, remains important for land rehabilitation and ecosystem restoration, despite requiring time and resources. Overall, these findings demonstrate that effective mitigation depends on prioritizing prevention through technology-driven monitoring and water management infrastructure, supported by regulatory enforcement. Suppression and management serve as complementary strategies to strengthen ecosystem resilience. This research provides a foundation for integrating fire prevention into governance frameworks, supporting sustainable forest management in South Sumatra and other fire-prone districts. Keywords: Analytical Hierarchy Process, forest and land fires, Importance Performance Analysis, mitigation, South Sumatra
Competitiveness of Indonesia’s Paper in Japan’s Market Atasha, Maya; Simangunsong, Bintang Charles Hamonangan; Manurung, Elisa Ganda Togu
Jurnal Sylva Lestari Vol. 13 No. 3 (2025): September
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v13i3.1248

Abstract

Paper and paperboard consistently contribute to Indonesia’s foreign exchange reserves with high export values. Research on demand and other economic analyses related to paper and paperboard products in Indonesia is insufficient. This paper focuses on Indonesian paper and paperboard competitiveness in international markets, especially in strengthening the Indonesian economy and supporting sustainable growth. Paper with Harmonized System Code 480256 is the largest proportion of Indonesia’s exported paper and is mostly exported to Japan. The import share of Indonesian paper in Japan’s market was approximately 69% from 2010 to 2023. Based on the Quadratic Almost Ideal Demand System (QUAIDS) model, the import demand of Indonesian paper was found to be elastic. Moreover, China and Indonesia papers were substitutes, whereas Indonesia and the United States papers were complementary. Expenditure elasticity analysis further showed that Indonesia’s paper was a normal good in Japan’s market. These results highlight the policy relevance for policymakers in designing and improving Indonesia’s forest products for international trade. Keywords: budget share, export, paper, price elasticity, QUAIDS

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