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All Journal Jurnal Sylva Lestari
Villareal, Jayric Fuentes
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Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Energy Environmental Science Materials Science & Nanotechnology

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Rapid Assessment of Trees and Shrubs in Sifaran Watershed, Maguindanao Island, Philippines: Implications for Watershed Conservation Villareal, Jayric Fuentes; Poclis, Cindy Eyop; Sindatok, Abdul Rasheed Nakan; De Vera, Peter Jan Dayrit; Santiago-Arenas, Raquel Doclis; Limbona, Bai Hejira Nefertiti Macalandong
Jurnal Sylva Lestari Vol. 14 No. 1 (2026): January
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v14i1.1253

Abstract

The Sifaran Watershed is a vital resource for local communities, serving as a water source that flows through the Ligawasan marsh in the Philippines. Despite its critical role, the watershed remains severely understudied. This lack of baseline data has been a major constraint to enacting effective conservation, ensuring the region’s ecological and socio-economic stability. This study focuses on assessing the trees and shrubs thriving in the Sifaran Watershed, as well as their conservation and distribution status. A stratified sampling approach was employed, establishing quadrats across different streams. The study recorded 77 plant species (55 trees and 22 shrubs) across lower, middle, and upper streams, which were largely diverse, with most species categorized as native and of Least Concern by the International Union for Conservation of Nature (IUCN). The presence of native species classified as Vulnerable species (Dracontomelon dao), Near Threatened (Ficus gigantifolia and Macaranga grandifolia), and Endangered (Mangifera odorata, Pterocarpus indicus, and Vitex parviflora) highlights the potential risks from habitat degradation and other threats. While most species exhibit stable populations, conservation efforts are necessary to protect those at risk and maintain the ecological balance of the watershed. The data gathered were utilized as baseline data to provide actionable recommendations for immediate conservation measures and sustainable management, protecting the invaluable natural heritage from threats such as deforestation, land conversion, and climate change. Moreover, initiatives such as habitat reforestation, responsible land use, and the conservation and protection of different species of trees and shrubs, particularly native species, are key to maintaining a balanced and sustainable watershed. Keywords: conservation status, endemic species, least concern species, native species, watershed
Comparative Radial and Axial Variation in the Physical Properties of Bagalunga (Melia azedarach L.) and Two Plantation-Grown Wood Species Marasigan, Oliver Segundo; Daguinod, Shereyl Aguirre; Melendez, Dundaele Kyle Bayer; Villareal, Jayric Fuentes
Jurnal Sylva Lestari Vol. 14 No. 1 (2026): January
Publisher : Department of Forestry, Faculty of Agriculture, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jsl.v14i1.1254

Abstract

The wood properties of the tree vary from radial to axial position. Limited local studies focusing on these attributes hinder the improvement of wood applications. This study examined the variation in the physical properties of bagalunga (Melia azedarach L.), teak (Tectona grandis L.f.) and mahogany (Swietenia macrophylla King.) across radial and axial positions. Physical properties were evaluated in accordance with the ASTM D143-2019 standard. Five trees per species were collected in Quezon Province, Philippines. Results showed significant variation in physical properties across species. Bagalunga (161.39%) displayed significantly higher green moisture content (GMC), 57.0% and 43.2% higher than mahogany (89.76%) and teak (104.10%), respectively. In terms of specific gravity (SG), bagalunga (0.42) had the lowest value, while teak (0.56) had the highest. Regarding shrinkage properties, bagalunga recorded the highest tangential and radial shrinkage, which were 49.2% and 48.9% higher than those of teak, and 77.6% and 18.4% higher than those of mahogany, respectively. Along the axial position, volumetric shrinkage (VS) declined from the butt to the middle portion. The VS of bagalunga was stable across axial position, whereas teak and mahogany decreased by 10.3% and 28.6%, respectively. In terms of radial position, a significant decrease in GMC was observed from pith to bark, ranging from 9.46% to 26.99% across species. On the other hand, SG increased towards the bark portion. Bagalunga displayed the highest RS and VS at the bark, while teak showed the lowest. Based on their physical properties, bagalunga, being dimensionally stable, is suited for non-structural applications, while mahogany can be used for structural applications, cabinetry, and furniture, and teak is optimal for high-value products. Keywords: Melia azedarach, specific gravity, Swietenia macrophylla, Tectona grandis, volumetric shrinkage
Co-Authors Daguinod, Shereyl Aguirre De Vera, Peter Jan Dayrit Limbona, Bai Hejira Nefertiti Macalandong Marasigan, Oliver Segundo Melendez, Dundaele Kyle Bayer Poclis, Cindy Eyop Santiago-Arenas, Raquel Doclis Sindatok, Abdul Rasheed Nakan