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All Journal JURNAL HUTAN LESTARI Tengkawang : Jurnal Ilmu Kehutanan Jurnal Biologi Tropis Abdimas Umtas : Jurnal Pengabdian kepada Masyarakat GERVASI: Jurnal Pengabdian kepada Masyarakat Jurnal Abdimas Madani dan Lestari (JAMALI) ULIN: Jurnal Hutan Tropis Jurnal Abdi Insani Jurnal TLM Blood Smear Jurnal Pengabdian Masyarakat dan Riset Pendidikan Jurnal Penelitian Hasil Hutan Forest and Nature
Yanti Hikma
Fakultas Kehutanan Universitas Tanjungpura Pontianak Kalimantan Barat
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Journal : Forest and Nature

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Marine Borer Resistance of Resak Wood (Vatica sp.): Assessing Durability Across Different Immersion Depths Yanti, Hikma; Riski, Muhammad; Dirhamsyah, Muhammad; Yani, Ahmad
Forest and Nature Vol. 1 No. 1 (2025): January
Publisher : Green Insight Solutions

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63357/fornature.v1i1.3

Abstract

Wood submerged in brackish and marine environments is highly susceptible to degradation by marine borers, which can compromise its structural integrity over time. Resak wood (Vatica sp.), widely used in boat construction, is frequently exposed to seawater, making it vulnerable to such bio-deterioration. This study aimed to assess the intensity of marine borer attacks on resak wood at different immersion depths (5 cm, 25 cm, and 50 cm) over three months in the estuary of Mempawah River, Mempawah Regency. Test samples (2 cm × 5 cm × 30 cm) were deployed, and data were analyzed using a Completely Randomized Design (CRD) with five replications, totaling 15 samples. The results revealed that resak wood exhibits high natural durability and is classified as durability class I, indicating strong resistance to marine borer infestations. The recorded weight loss percentages were 1.48% at 5 cm depth, 1.81% at 25 cm depth, and 2.69% at 50 cm depth, with statistical analysis confirming a significant effect of immersion depth on weight loss. This suggests that while resak wood is highly resistant, degradation intensifies with increasing submersion depth. Four marine borer species were identified in the estuarine waters of the Mempawah River: Limnoria sp., Balanus sp., Nereis sp., and Teredo sp. Their presence highlights the potential threat to submerged wooden structures in the region. Despite its durability, prolonged exposure and greater immersion depth may gradually reduce the structural performance of resak wood. Further long-term studies are recommended to evaluate its resistance under diverse environmental conditions and to explore protective treatments that could enhance its durability in marine applications.
Variation of Chemical Components in Bintangur (Callophyllum inophyllum) Wood along Stem Position and Its Potential Industrial Uses Yanti, Hikma; Alkhadi; Dirhamsyah, Muhammad; Yani, Ahmad
Forest and Nature Vol. 1 No. 4 (2025): October
Publisher : Green Insight Solutions

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63357/fornature.v1i4.29

Abstract

This study investigates the axial variation of major chemical constituents in bintangur wood (Calophyllum inophyllum), a species native to Indonesian peat forests, with emphasis on its industrial applicability. Wood samples were collected from three stem positions—base, middle, and top—to quantify extractives, holocellulose, alpha-cellulose, hemicellulose, and lignin content using the Technical Association of the Pulp and Paper Industry (TAPPI) standard methods. The results revealed a notable chemical gradient along the tree axis. Holocellulose (65.76–72.28%) and alpha-cellulose (44.56–49.61%) increased toward the upper stem, indicating enhanced suitability for pulp, paper, and bioethanol conversion at the tip region. In contrast, ethanol-benzene extractives peaked at the middle (7.26%) and declined at the tip (4.52%), while lignin exhibited a non-linear pattern, ranging between 25.47–28.64%. The moderate lignin content supports potential applications for charcoal, adhesives, phenolic derivatives, vanillin synthesis, and engineered wood products. Meanwhile, the relatively high extractive fraction suggests additional prospects for natural preservatives, essential oils, dye sources, and marine-grade timber. Overall, the distinct axial variability in chemical composition highlights the importance of stem-position-based processing optimization and demonstrates the feasibility of bintangur as a versatile raw material for biorefinery-based utilization. These findings provide baseline knowledge supporting future industrial development and valorization strategies for this under-exploited tropical hardwood.
Co-Authors Addrian Advinda ahmad yani Ahmad Yani Alkhadi An dika Andriadi Andriadi Arianto, Ferdi Dwi Asdinar Bagaskara, Arul Bartolomeus Witan Bija, Yosanti Ester Bujang Sudarmadi Dirhamsyah, Muhammad Eny, Julia Evy Wardenaar Evy Wardenaar Farah Diba Fathul Yusro Gusti Eva Tavita Hari Wibowo Harnani Husni Hasan Ashari Oramahi Heri Gunawan Herlina Darwati IGK Tapa Darma Islawati Issan, Kurniawan Pratama Kris tianti Kusuma, Ahmad Ary Lolyta Sisillia Luh Putu Ratna Sundari M. Dirhamsyah Muhammad Riski, Muhammad Muhammad Saupi Musaicho, Dodi Noor Adha Fajar Hartomo Rahmahwati, Ratih Rahmat Aryandi Sarma Siahaan Shenny Oktoriana Silvia Uslianti Sitti Hadijah, Sitti Syarifah Ashria Daviyana Tri Wahyudi Ulli Kadaria Wasrin Syafii Yeni Mariani Zuhry Haryono