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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 Sylva Scienteae MAKILA: Jurnal Penelitian Kehutanan Jurnal Sains dan Teknologi Open Science and Technology Jurnal Riset Rumpun Ilmu Tanaman BAKIRA: Jurnal Pengabdian Kepada Masyarakat Ardhi: Jurnal Pengabdian dalam Negri MARSEGU : Jurnal Sains dan Teknologi Jurnal Pengabdian Cendekia Maanu : Jurnal Pengabdian Kepada Masyarakat PENGAMATAN: Jurnal Pengabdian Masyarakat untuk Ilmu MIPA dan Terapannya
Irwanto Irwanto
Jurusan Kehutanan Fakultas Pertanian Universitas Pattimura Ambon Jl. Ir. M. Putuhena, Kampus Poka Ambon 97237
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KEANEKARAGAMAN SPESIES DAN PENDUGAAN CADANGAN KARBON ATAS PERMUKAAN PADA TIPE PENGELOLAAN LAHAN DUSUNG NEGERI RUTONG, AMBON Irwanto, Irwanto; Sahupala, Andjela; Siruru, Herman
MAKILA Vol 17 No 2 (2023): Makila: Jurnal Penelitian Kehutanan
Publisher : Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/makila.v17i2.10881

Abstract

Dusung is traditional land management in Maluku by planting various plant species in the same area. Factors such as intensive land management, selection and combination of plant species, vegetation structure, topography, soil, and others influence the economic and ecological productivity of dusung. Ecological productivity affects the biomass content, which indicates the potential for carbon absorption in the land. The method used in this research is direct measurements in the field of several carbon pools specifically for aboveground biomass. Data collection was guided by Indonesian National Standards (SNI) 7724-2019 concerning field measurements for estimating forest carbon stocks. The research result showed that the diversity of vegetation species in Dusung Rutong Village at all growth levels in the moderate category tends to be low, dominated by fruit plants such as Durian (Durio zibethinus). Tree-level species diversity is moderate because the community controls the species that grow on Dusung land. The total aboveground carbon stocks in Dusung Rutong Village are 106.424 tonnes/ha, consisting of trees 100.673 tonnes/ha, undergrowth 1.708 tonnes/ha, litter 1.124 tonnes/ha, necromass 0.042 tonnes/ha and bamboo (Schizostachyum brachycladum) 2.877 tonnes/ha while the potential for equivalent carbon dioxide (CO2) absorption of 390.221 tonnes/ha.
PEMILIHAN JENIS POHON UNTUK KEGIATAN REBOISASI PADA BENDUNGAN WAY APU KABUPATEN BURU Irwanto, Irwanto; Sahupala, Andjela; Tetelay, Febian Filiph
MAANU: Jurnal Pengabdian Kepada Masyarakat Vol 1 No 1 (2023): Maanu Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/maanuv1i1p26-32

Abstract

During the construction of the Way Apu Dam, the land was cleared which needed to be rehabilitated. Rehabilitation of this land requires species that can grow well and are also aesthetically pleasing and also have multiple functions. The stages of implementing rehabilitation species selection activities include observation and direct observation, inventory of endemic species in the field, monitoring of species that fail in the field, analysis of problems. Problems with previous planting failures and recommendations for suitable species. The types recommended for rehabilitation of open land are as follows: Samama (Anthocephalus macrophyllus), Pulai (Alstonia scholaris), Mountain Cassowary/Mountain Pine (Casuarina junghuhniana), Eucalyptus (Melaleuca cajuput), Eucalyptus (Eucalyptus alba), Meranti ( Shorea selanica), Lasa (Captanopsis burana), Acacia broadleaf (Acacia mangium), and Sentigi/Papua (Pemphis acidula). Planting on the left and right of the road are: Sentigi/Papua (Pemphis acidula), Mountain Cassowary/Mountain Pine (Casuarina junghuhniana), Samama (Anthocepalus macrophyllus), Pulai (Alstonia scholaris), Lasa (Castanopsis hunta), Meranti (Shorea selanica), Kayu Putih (Melaleuca cajuput), and Acacia broadleaf (Acacia mangium). Selection of species for the area planned for agro-tourism is as follows: Rambutan (Nephelium lappaceum), longan (Dimocarpus longan), types of vegetative mangoes (grafts).
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): Oktober : 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.
Species Diversity and Estimation of Aboveground Carbon Stocks in Beach Forests, Hatusua Village, Maluku, Indonesia Irwanto, Irwanto; Sahupala, Andjela; Tetelay, Febian F; Komul, Yulianus D
Open Science and Technology Vol. 4 No. 2 (2024): Open Science and Technology
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33292/ost.v4i2.141

Abstract

Hutan pantai memiliki peran ekologis yang penting dalam menjaga keseimbangan ekosistem pesisir, termasuk dalam menyerap karbon dan mendukung keanekaragaman hayati. Penelitian ini bertujuan untuk menganalisis keanekaragaman jenis pada berbagai tingkat pertumbuhan vegetasi dan menduga cadangan karbon atas permukaan di hutan pantai Negeri Hatusua, Kecamatan Kairatu, Kabupaten Seram Bagian Barat, Maluku. Analisis keanekaragaman menggunakan indeks Shannon-Wiener dan pendugaan cadangan karbon dilakukan dengan metode non-destruktif dan destruktif, mencakup pohon, nekromas, tumbuhan bawah, dan serasah. Hasil penelitian menunjukkan bahwa tingkat semai memiliki nilai keanekaragaman tertinggi (H’ = 2.48), diikuti oleh pancang (H’ = 2.18), pohon (H’ = 1.59), dan tiang (H’ = 1.22). Kerapatan vegetasi mencerminkan pola regenerasi alami hutan, dengan tingkat semai mencapai 130,500 individu/ha, namun mengalami penurunan signifikan pada tingkat pancang (1,920 individu/ha), tiang (460 individu/ha), dan pohon (100 individu/ha). Sedangkan total cadangan karbon atas permukaan mencapai 89.41 ton/ha, dengan pohon sebagai penyimpan karbon terbesar (83.87 ton/ha atau 93.81% dari total karbon), dan serapan karbon dioksida mencapai 327.83 ton/ha ekuivalen. Beach forests play a crucial ecological role in maintaining the balance of coastal ecosystems, including carbon sequestration and biodiversity support. This study aims to analyze species diversity at various vegetation growth stages and estimate aboveground carbon stocks in the coastal forest of Negeri Hatusua, Kairatu District, West Seram Regency, Maluku. Diversity analysis was conducted using the Shannon-Wiener index, while carbon stock estimation was carried out using non-destructive and destructive methods, covering trees, necromass, understory vegetation, and litter. The results show that the seedling stage has the highest diversity value (H’ = 2.48), followed by the sapling (H’ = 2.18), tree (H’ = 1.59), and pole (H’ = 1.22) stages. Vegetation density reflects the natural regeneration pattern of the forest, with seedlings reaching 130,500 individuals/ha, but significantly decreasing at the sapling (1,920 individuals/ha), pole (460 individuals/ha), and tree (100 individuals/ha) stages. The total aboveground carbon stock was found to be 89.41 tons/ha, with trees serving as the most significant carbon reservoir (83.87 tons/ha or 93.81% of the total carbon). In comparison, carbon dioxide sequestration reached 327.83 tons/ha equivalent.
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
Sosialisasi Pemilihan Jenis Tanaman Pada Tanah Ber-pH Asam Dalam Upaya Peningkatan Produktivitas Lahan Pertanian Di Dusun Karanjang Ambon Sahupala, Andjela; Irwanto, Irwanto
PENGAMATAN: Jurnal Pengabdian Masyarakat untuk Ilmu MIPA dan Terapannya Vol 3 No 2 (2025): PENGAMATAN: Jurnal Pengabdian Masyarakat untuk Ilmu MIPA dan Terapannya
Publisher : Jurusan Matematika FMIPA Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/pengamatanv3i2p67-76

Abstract

Acidic soil with pH < 6 is one of the main constraints in agricultural development in tropical areas, including in Karanjang Hamlet, Wayame Village. This condition causes low nutrient availability and metal toxicity that inhibits plant growth. This community service aims to increase farmers' knowledge about selecting plant species that are tolerant to acidic soil and land management techniques. The method used is a participatory approach through extension, demonstration, and hands-on practice involving 30 farmers in Karanjang Hamlet. Extension activities were conducted on May 23, 2025, with materials covering characteristics of acidic soil, pH effects on plants, tolerant plant species, and soil amelioration techniques. The results showed a 75% increase in farmers' knowledge about acid-tolerant plants such as cassava, corn, peanuts, and coffee. Practice evaluation showed that 80% of participants were able to identify symptoms of soil acidity and apply liming techniques and organic matter application. This program successfully increased farmers' awareness about the importance of acidic soil management for sustainable agricultural productivity.
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).
KAJIAN TERMINOLOGI BOTANI DAN EKOLOGI TERHADAP ISTILAH TUMBUHAN, TANAMAN, VEGETASI, FLORA, DAN TEGAKAN Queen Athalia Deborah Rante; Irwanto Irwanto
MARSEGU : Jurnal Sains dan Teknologi Vol. 1 No. 12 (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/1.12.2025.1225-1231

Abstract

In biological and ecological sciences, the terms tumbuhan (plant/organism), tanaman (cultivated plant), vegetasi (vegetation), flora, and tegakan (stand) are often used interchangeably in everyday discourse. However, these five terms carry distinct definitions, scopes, and conceptual contexts. This article aims to examine and clarify the differences among these terms through terminological, ecological, and biogeographical approaches. Through a literature review of prominent botanical and ecological sources, the study concludes that: (1) tumbuhan refers to individual autotrophic, chlorophyll-bearing organisms as biological entities within taxonomic classification; (2) tanaman refers to plants cultivated by humans for specific purposes and benefits; (3) vegetasi denotes the collective community of plants covering a given area from an ecological perspective; (4) flora refers to the totality of plant species present in a specific geographical region within a biogeographical framework; and (5) tegakan refers to a group of trees or woody plants growing together in a defined area with relative uniformity in composition, structure, and growth conditions. A precise understanding of these five terms is essential for researchers, students, and practitioners in the fields of biology, ecology, forestry, agriculture, and nature conservation.
Co-Authors Abdan Sukur Ely Andjela Sahupala Andri Tuhumury Billy Gilbert Anthonius Boreel, Aryanto Cornelia Marietje Aneke Wattimena Creysmen Ginesio Pentury Demianus Tamala Donald Dias Ega, La Elfrida Ratnawati Febian Filiph Tetelay Ferdinandus, Stenly Jacobus 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 Miranda H. Hadijah Moda Talaohu Moda Talaohu Muhammad Faisal Noel Bernard Paembonan, Samuel Arung Putu Oka Ngakan Queen Athalia Deborah Rante Rahawarin, Moh Firdaus Regar, Erfendi Renwarin, Nur Muhammad Risma Illa Maulany Rohny Setiawan Maail Seipalla, Billy Setiani Br Ginting Siahaya, Ludia Sinay, Lexy J. Sintia Cornelia Br Gurusinga Siruru, Herman Sofia Mustamu Soselisa, Fanny Talaohu, Moda Tetelay, Febian F Tobaru, Sulistiawati Tupan, Johan M. Wattimena, Christofer Wenno, Meiske Yali Joko Istia, Yali Joko Istia Yatim, Hertasning