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I Gde Adi Suryawan Wangiyana
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jurnalsilvasamalas@gmail.com
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INDONESIA
Jurnal Silva Samalas: Journal of Forestry and Plant Science
Published by Universitas Pendidikan Mandalika
ISSN : 26216779     EISSN : 27767175     DOI : -
Core Subject : Agriculture, Social,
Agriculture, Biological Sciences & Forestry Environmental Science
Jurnal Silva Samalas intended as a medium for communication between researchers about their work. This journal accepted scientific papers on various topics including forestry, agriculture, botany, and environmental science. Jurnal Silva Samalas also accepted various types of scientific paper including research paper, systematic reviews, and short communication.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Kehutanan
Articles 154 Documents
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MORPHOLOGICAL VARIATION OF Cyrtophyllum fragrans (Roxb.) AMONG FOUR HABITAT TYPES IN JAMBI PROVINCE: A MULTIVARIATE APPROACH Fawwaz Dinanty; Hamzah; Anisatul Farikhah; Dian Nisya; Hafizah Nahlunnisa; Doani Anggi Safira
Jurnal Silva Samalas Vol. 9 No. 1 (2026): Juni 2026
Publisher : Universitas Pendidikan Mandalika

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Abstract

Cyrtophyllum fragrans (Roxb.) Don is a high-value hardwood tree whose population in Jambi Province is threatened by habitat fragmentation and land conversion, yet morphological data based on local populations remain unavailable. This study examined quantitative and qualitative morphological variation of C. fragrans from four locations in Jambi Province representing different ecological conditions, and identified phenotypic clustering patterns using a multivariate approach. Observations were conducted on 39 individual trees; quantitative characters included tree height (TH), diameter at breast height (DBH), leaf length (LL), leaf width (LW), and petiole length (PL), while qualitative characters included lamina shape, apex, base, and margin. Data were analyzed using Principal Component Analysis (PCA) and Hierarchical Clustering on Principal Components (HCPC) with Ward's method and Euclidean distance. All five quantitative characters (TH, DBH, LL, LW, and PL) differed significantly among locations: leaf dimension characters (LL, LW, PL) responded most strongly to light intensity gradients, while tree size characters (TH, DBH) reflected cumulative growth history and habitat fragmentation effects. PCA identified two independent phenotypic gradients explaining 80.4% of total variance: PC1 (45.7%) captured the leaf dimension gradient as a plastic response to light intensity, and PC2 (34.7%) captured the tree size gradient recording long-term growth accumulation. HCPC produced four clusters with cross-site composition: K1 (small leaves, full sun), K2 (suppressed axial growth), K3 (very large DBH, cumulative growth), and K4 (large leaves, shaded). Qualitative leaf characters (simple opposite leaves, elliptic lamina, acuminate to caudate apex, cuneate base, entire margin, and pinnate venation) were consistent with the species description of C. fragrans across all four accessions and showed no meaningful variation among locations, confirming their stability as species-level taxonomic markers. Site ecological conditions, not geographic origin, were the primary determinant of morphological phenotype in C. fragrans, with implications for individual-based selection of mother trees in breeding programs rather than location-based selection.
SPATIAL ANALYSIS OF SUSTAINABLE MANGROVE TOURISM IN THE SERAMBI DELI COASTAL AREA, PANTAI LABU DISTRICT, NORTH SUMATRA Aulia Putra Daulay; Ratna Sari
Jurnal Silva Samalas Vol. 9 No. 1 (2026): Juni 2026
Publisher : Universitas Pendidikan Mandalika

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Abstract

Mangrove ecotourism is largely unknown to the general public due to limited development and insufficient assessment of its suitability, especially in North Sumatra. Spatial analysis in determining the suitability of coastal areas is rarely conducted. This spatial analysis uses Geographic Information System (GIS) applications in determining the management model for mangrove forest areas. The purpose of this study is to determine how to manage and develop mangrove ecotourism through spatial analysis based on ecotourism-related parameters. This study was conducted from September to December 2025. The research methodology included an analysis of the suitability matrix of mangrove forests for ecotourism, a SWOT analysis to identify the strengths, weaknesses, and challenges in the suitability of land for ecotourism, and remote sensing analysis using ArcGIS 10.8 with Band 8 and Band 4 for NDVI. The results obtained were an Ecotourism Suitability Index value of 71.05%, which is classified as conditionally suitable, a SWOT analysis in the form of ecotourism development for promotion through social media and support for accessibility and ecotourism infrastructure, and remote sensing analysis with an average NDVI value of 0.36, which is classified as high density. The conclusion of this study is that the mangrove forest at Serambi Deli Beach is suitable for ecotourism development, but several conditions must be improved, including mangrove species diversity, mangrove density, and infrastructure to support ecotourism activities.
POLICY STRATEGY DIRECTIONS FOR MANGROVE ECOSYSTEM GOVERNANCE IN CLIMATE CHANGE MITIGATION EFFORTS AT MENIPO NATURE TOURISM PARK Habel Martin Nopemnanu; Alfred O.M Dima; Lusia Sulo Marimpan; Mitha Rabiyatul Nufus; Hendra Kurniawan; Sutan Sahala Muda Marpaung
Jurnal Silva Samalas Vol. 9 No. 1 (2026): Juni 2026
Publisher : Universitas Pendidikan Mandalika

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Abstract

Mangrove ecosystem management plays an important role in achieving the Sustainable Development Goals (SDGs), particularly in protecting coastal and marine ecosystems from environmental degradation. Mangrove forests also contribute to climate change mitigation as blue carbon ecosystems through their capacity to absorb and store large amounts of carbon. This study aimed to analyze mangrove vegetation community structure, carbon potential, and management strategies for climate change mitigation in Menipo Nature Tourism Park (TWA Menipo), Indonesia. Data were collected using both qualitative and quantitative methods. The study identified 15 mangrove species, with Rhizophora mucronata, Bruguiera gymnorrhiza, Rhizophora stylosa, and Bruguiera parviflora as the dominant species. The vegetation exhibited a moderate diversity index, low evenness, and low species richness. Total biomass was estimated at 1,959.27 t/ha, while carbon stock and CO₂ sequestration potential reached 920.86 t/ha and 3,376.48 t/ha, respectively, highlighting the significant ecological role of mangroves as carbon sinks. The main driving factors influencing management direction were the sustainability of mangrove rehabilitation programs and the level of ecosystem degradation. Key stakeholders included Mangrove Farmer Groups, Non-Governmental Organizations (NGOs), the East Nusa Tenggara Natural Resources Conservation Agency (BKSDA NTT), village governments, and traditional leaders. Recommended management strategies include conducting biophysical assessments prior to rehabilitation, strengthening customary regulations, empowering local communities through social forestry programs, allowing sustainable harvesting of fishery resources without damaging mangrove habitats, providing designated boat-parking areas, and developing priority zoning maps for rehabilitation. These measures are expected to support sustainable mangrove conservation and enhance climate change mitigation efforts.
ANALYSIS OF PALM OIL BIOMASS UTILIZATION FOR RENEWABLE ENERGY GENERATION AT PTPN IV DOLOK ILIR Fitri Annisa Alfi Siregar; Zulham Effendi
Jurnal Silva Samalas Vol. 9 No. 1 (2026): Juni 2026
Publisher : Universitas Pendidikan Mandalika

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Abstract

This study analyzes the potential and utilization of palm oil biomass as a renewable energy source in the cogeneration system of PTPN IV Dolok Ilir, North Sumatra. Palm oil processing generates three primary biomass residue streams: empty fruit bunches (EFB, 22-23% w/w of FFB), mesocarp fiber (12-13% w/w of FFB), and palm shells (5-6% w/w of FFB). The installed cogeneration capacity is 2,000 kW; however, operational observations in August 2025 recorded an average actual power output of 746 kW (37.3% of installed capacity). Turbine isentropic efficiency averaged approximately 55.81%, compared to a design value of 75.00%, indicating a gap of 19.19 percentage points. Steam mass flow rates averaged 42.4 t/h against a design value of 64.9 t/h. EFB, the largest residue stream by weight, remains underutilized as cogeneration fuel. The findings highlight significant opportunities to enhance biomass-to-energy conversion through maintenance optimization and EFB valorization strategies.

Page 16 of 16 | Total Record : 154

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