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All Journal Journal of Degraded and Mining Lands Management Jurnal Hutan Pulau-Pulau Kecil : Jurnal Ilmu-Ilmu Kehutanan dan Pertanian Jurnal Sains dan Teknologi Jurnal Riset Rumpun Ilmu Tanaman BAKIRA: Jurnal Pengabdian Kepada Masyarakat Ardhi: Jurnal Pengabdian dalam Negri MARSEGU : Jurnal Sains dan Teknologi Jurnal Pengabdian Cendekia
Irwanto Irwanto
Jurusan Kehutanan Fakultas Pertanian Universitas Pattimura Ambon Jl. Ir. M. Putuhena, Kampus Poka Ambon 97237
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STUDI TINGKAT KEBERHASILAN DAN SOLUSI REHABILITASI MANGROVE PADA TELUK AMBON BAGIAN DALAM, PROVINSI MALUKU Irwanto, Irwanto; Sahupala, Andjela; Soselisa, Fanny
MARSEGU : Jurnal Sains dan Teknologi Vol. 1 No. 9 (2024): MARSEGU : Jurnal Sains dan Teknologi
Publisher : PT. BARRINGTONIA ASIATICA LESTARI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69840/marsegu/1.9.2024.1016-1041

Abstract

This study evaluates the success and failure of mangrove rehabilitation in Inner Ambon Bay, focusing on environmental factors, planting techniques, and habitat conditions. The research was conducted over 12 months, from May 2022 to April 2023, using descriptive quantitative and qualitative methods. Primary data were collected through field observations and interviews, while secondary data from relevant institutions were analyzed using Survival Rate and Growth Rate formulas. Out of 1,260 planted mangrove seedlings, only 29 survived, yielding a success rate of 2.3%. Failure factors include inadequate substrate, narrow intertidal zones due to reclamation, and wave disturbances. Proposed solutions include substrate modification, species zoning adjustments, and mechanical protection for seedlings. These findings highlight the importance of ecologically integrated approaches in mangrove rehabilitation programs to ensure long-term success.
BIOMASSA TUMBUHAN BAWAH PADA BERBAGAI TIPE HUTAN ALAM DI NEGERI HATUSUA. PROVINSI MALUKU. Rahawarin, Moh Firdaus; Irwanto, Irwanto; Hadijah, Miranda
MARSEGU : Jurnal Sains dan Teknologi Vol. 1 No. 11 (2025): MARSEGU : Jurnal Sains dan Teknologi
Publisher : PT. BARRINGTONIA ASIATICA LESTARI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69840/marsegu/1.11.2025.1113-1128

Abstract

Understory biomass plays an important role in maintaining forest ecosystem balance and the carbon cycle. This study aims to measure and compare understory biomass across various natural forest types in Hatusua Village, Maluku, namely Coastal Forest, Mangrove Forest, Dominant Aren Forest, and Lowland Forest. The method used includes systematic sampling with 2x2 meter plots, considering dense, moderate, and sparse conditions, where all understory plants were collected, weighed, and dried to estimate dry biomass. The results showed that the highest biomass was found in the Coastal Forest (2,716.14 kg/ha), followed by the Mangrove Forest (2,545.87 kg/ha), the Lowland Forest (1,841.72 kg/ha), and the lowest in the Dominant Aren Forest (1,629.33 kg/ha). This biomass variation is influenced by light intensity, soil conditions, and vegetation structure. Carbon content calculations based on biomass indicate that the Coastal Forest has the highest carbon storage, followed by the Mangrove Forest, Lowland Forest, and Dominant Aren Forest. This study confirms that understory biomass is a vital component of forest ecosystems, requiring attention in conservation efforts and climate change mitigation.
BIOMASSA SERASAH PADA BERBAGAI TIPE HUTAN ALAM DI NEGERI HATUSUA. PROVINSI MALUKU. Latupono, Abdul; Irwanto, Irwanto; Hadijah, Miranda
MARSEGU : Jurnal Sains dan Teknologi Vol. 1 No. 11 (2025): MARSEGU : Jurnal Sains dan Teknologi
Publisher : PT. BARRINGTONIA ASIATICA LESTARI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69840/marsegu/1.11.2025.1140-1152

Abstract

Litter biomass is an essential component of forest ecosystems, playing a role in nutrient cycling, soil stability, and carbon storage. This study aims to measure and compare litter biomass across various types of natural forests in Hatusua Village, namely Coastal Forest, Mangrove Forest, Dominant Aren Forest, and Lowland Forest. The method used involved collecting litter samples from 2 × 2 meter plots, followed by drying and weighing to estimate dry biomass. The results showed that the highest litter biomass was found in Dominant Aren Forest (7,400.56 kg/ha), followed by Coastal Forest (5,773.71 kg/ha), Lowland Forest (1,798.55 kg/ha), and the lowest in Mangrove Forest (1,547.36 kg/ha). Differences in litter biomass among forest types were influenced by vegetation type, litter density, decomposition rates, and environmental conditions. This information is crucial for sustainable forest management and climate change mitigation through carbon storage in forest litter.
Struktur dan Komposisi Hutan Mangrove di Negeri Kamarian Kecamatan Kairatu Kabupaten Seram Bagian Barat, Maluku Creysmen Ginesio Pentury; Irwanto, Irwanto; Moda Talaohu
INSOLOGI: Jurnal Sains dan Teknologi Vol. 4 No. 2 (2025): April 2025
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v4i2.4986

Abstract

Mangrove forests represent one of the most ecologically and economically significant coastal ecosystems. Ecologically, well-structured mangrove vegetation functions as a natural buffer protecting coastlines from erosion, saltwater intrusion, and tidal wave impacts. This research aims to determine the structure and composition of mangrove forests and identify mangrove growth habitats in Kamarian. The vegetation analysis employed the line plot method with measurement plots of 20 m × 20 m for all growth stages (seedling, sapling, and tree), consisting of two blocks: Block A with 36 plots covering 1.44 ha, and Block B with 25 plots covering 1.00 ha. Results indicate that mangrove forests in Kamarian can be classified into four strata according to tree height: Stratum A (20-28 m), Stratum B (5-20 m), Stratum C (1-5 m), and Stratum D (0-1 m). Tree diameter variations ranged from 10 to 148 cm, with heights reaching 5-28 meters. Block A contained four mangrove species: Sonneratia alba, Aegiceras corniculatum, Rhizophora apiculata, and Sonneratia caseolaris, while Block B contained only two species: Aegiceras corniculatum and Sonneratia alba. The Shannon-Wiener species diversity index for all growth stages in Kamarian's mangrove forests ranged from 0.20 to 0.81, categorized as low diversity.
Sosialisasi dan Peningkatan Ketahanan Desa dalam Menghadapi Perubahan Iklim di Desa Amahusu Irwanto, Irwanto; Loppies, Ronny; Sahupala, Andjela; Hatulesila, Jan Willem; Fredy Hendry Louhenapessy
Jurnal Pengabdian Cendekia Vol. 1 No. 2 (2025): Edisi Agustus
Publisher : PT Pustaka Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71417/jpc.v1i2.24

Abstract

Perubahan iklim merupakan tantangan global yang berdampak signifikan pada ketahanan desa, khususnya di wilayah Indonesia yang 8,86% desanya termasuk dalam kategori kerentanan tinggi dan sangat tinggi. Pengabdian kepada masyarakat ini bertujuan meningkatkan pemahaman dan kapasitas masyarakat Desa Amahusu, Kota Ambon dalam upaya adaptasi dan mitigasi perubahan iklim. Metode yang digunakan adalah sosialisasi interaktif, pengukuran tingkat pemahaman awal dan akhir, serta pendampingan dengan melibatkan 30 peserta yang terdiri dari remaja dan orang dewasa. Hasil evaluasi menunjukkan peningkatan pemahaman peserta dari rata-rata skor 43,7% menjadi 78,3% setelah sosialisasi. Persentase peserta yang memahami konsep perubahan iklim meningkat dari 36,7% menjadi 86,7%, sedangkan yang mampu mengidentifikasi tindakan adaptasi dan mitigasi meningkat dari 30% menjadi 83,3%. Kegiatan ini telah berhasil memperkuat kapasitas masyarakat Desa Amahusu dalam menghadapi perubahan iklim dan mendukung status mereka sebagai penerima penghargaan Program Kampung Iklim (Proklim).
Peningkatan Kapasitas Masyarakat untuk Mitigasi Bencana dan Pelestarian Lingkungan melalui Edukasi dan Aksi Penanaman di Kota Ambon Irwanto Irwanto
ARDHI : Jurnal Pengabdian Dalam Negri Vol. 3 No. 5 (2025): October : ARDHI : Jurnal Pengabdian Dalam Negri
Publisher : Asosiasi Riset Pendidikan Agama dan Filsafat Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/ardhi.v3i5.1507

Abstract

Indonesia is highly susceptible to natural disasters owing to its geographical location at the intersection of three major tectonic plates. Effective disaster mitigation requires active community participation through education and tangible environmental conservation measures. This community engagement initiative aimed to strengthen community capacity for disaster mitigation and environmental preservation through cross-sectoral collaboration involving the Regional Disaster Management Agency (BPBD), the Faculty of Agriculture at Pattimura University, and the Sagu Salempeng GPM Foundation. Implementation methods comprised disaster mitigation education, extension services on conservation plant cultivation, memorandum of understanding (MoU) signing, and seedling distribution to 12 representatives from 6 villages in Ambon City, Maluku region. Outcomes revealed enhanced community comprehension of disaster mitigation concepts and strengthened commitment toward planting productive species for environmental conservation purposes. This initiative contributes to community resilience development and reinforces Indonesia's Disaster Resilient Village program.
Analisis Struktur dan Vegetasi di Sempadan Sungai Ira (Wae Ira) Negeri Kamarian, Kecamatan Kairatu, Kabupaten Seram Bagian Barat Labetubun, Agung Herat; Irwanto, Irwanto; Tetelay, Febian Filiph
Jurnal Riset Rumpun Ilmu Tanaman Vol. 4 No. 2 (2025): Oktober : JURRIT: Jurnal Riset Rumpun Ilmu Tanaman
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurrit.v4i2.6658

Abstract

This study aims to analyze the structure and composition of vegetation on the banks of the Ira River (Wae Ira), Negeri Kamarian, Kairatu District, West Seram Regency. Riparian vegetation plays an important role in maintaining the stability of river ecosystems, both in terms of ecological, hydrological, and biodiversity aspects. The method used in this study is a combination of the continuous strip sampling method and the line plot sampling method, which are applied to four levels of vegetation growth, namely seedlings, saplings, poles, and trees. The results of the analysis show that the vegetation structure in the study area is divided into four strata, with varying species compositions in each stratum. The dominant species found include Pulai (Alstonia scholaris), Pulaka (Cyrtosperma merkusii), Buah rao (Dracontomelon mangiferum), and Salam (Syzygium polyanthum). The highest Importance Value Index (INP) at the tree level is owned by Pulai (Alstonia scholaris) at 54,2. The highest vegetation density is at the seedling level with 52000 individuals/ha and the lowest at the tree level with 341 individuals/ha. The Shannon-Wiener diversity index (H') ranges from 1.87–2.65, indicating a moderate level of diversity. The results of this study indicate that the Ira River border area still has a relatively good vegetation structure and composition, although there are ecological pressures that cause dominance by certain species
KERAGAMAN FENOTIPE DAUN MERANTI PUTIH (Anthoshorea montigena) DI PULAU SERAM Wattimena, Christofer; Matinahoru, Johan M.; Irwanto, Irwanto
MARSEGU : Jurnal Sains dan Teknologi Vol. 2 No. 11 (2026): MARSEGU : Jurnal Sains dan Teknologi
Publisher : PT. BARRINGTONIA ASIATICA LESTARI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69840/marsegu/2.11.2026.826-841

Abstract

This study examines the phenotypic diversity of White Meranti (Anthoshorea montigena) leaves in Seram Island by analyzing leaf morphology across four sites: Honitetu, Latu, Haya, and Masihulan. The research aims to identify similarities in leaf characteristics among locations and to evaluate the influence of environmental factors on phenotypic variation. A purposive sampling survey was conducted, with both quantitative and qualitative data analyzed using ANOVA and regression. Results revealed significant variation in leaf area, primary vein length, and number of secondary veins. Environmental factors contributed differently at each site: light intensity affected 32.54% of leaf area in Honitetu, air humidity 30.86% in Latu, soil fertility 51.98% in Haya, and humidity 22.41% in Masihulan. The phenogram indicated 85% similarity between Honitetu and Latu, 80% with Haya, and greater divergence with Masihulan. These findings provide valuable insights for future breeding and conservation of White Meranti (Anthoshorea montigena).
Co-Authors Abdan Sukur Ely Andjela Sahupala Andri Tuhumury Billy Gilbert Anthonius Cornelia Marietje Aneke Wattimena Creysmen Ginesio Pentury Donald Dias Elfrida Ratnawati Febian Filiph Tetelay Fredy Hendry Louhenapessy Fredy Hendry Louhenapessy Gun Mardiatmoko Hadijah, Miranda Hendrina Lelloltery Herman Siruru Iskar Iskar Iskar, Iskar Jan W. Hatulesila Jimmy Johanson Fransz Jimmy Titarsole Komul, Yulianus Labetubun, Agung Herat Latupono, Abdul Leonard Dantje Liliefna Leonard Dantje Liliefna Lesly Latupapua Lieke Tan Loppies, Ronny Louhenapessy, Fredy Hendry Lydia Riekie Parera Matinahoru, Johan M Moda Talaohu Moda Talaohu Noel Bernard Paembonan, Samuel Arung Putu Oka Ngakan Rahawarin, Moh Firdaus Risma Illa Maulany Rohny Setiawan Maail Seipalla, Billy Setiani Br Ginting Sintia Cornelia Br Gurusinga Sofia Mustamu Soselisa, Fanny Talaohu, Moda Wattimena, Christofer Yatim, Hertasning