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All Journal MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management Jurnal Teknosains MAKILA: Jurnal Penelitian Kehutanan MARSEGU : Jurnal Sains dan Teknologi
Kastanya, Agustinus
Postgraduate Program, Pattimura University, Jl. Ir. M. Putuhena Ambon, Indonesia 97233
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering

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Moisture Content and Absorption Levels of Carbon Dioxide in Binuang Bini (Octomeles sumatrana Miq) Trees For Climate Change Management Jacob Kailola; Gun Mardiatmoko; Radios Simanjuntak; Agustinus Kastanya
Jurnal Manajemen Hutan Tropika Vol. 27 No. 3 (2021)
Publisher : Institut Pertanian Bogor (IPB University)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.7226/jtfm.27.3.143

Abstract

Binuang bini (Octomeles sumatrana Miq) is a fast-growing tree with numerous economic benefits, such as the provision of wood for carpentry purposes, building boards, water management, and absorption of carbon dioxide (CO2). Therefore, this tree species has great potential and needs to be included in Reducing Emission from Deforestation and Forest Degradation (REDD)+'s mitigation program to tackle climate change. In its development, REDD+ has made it possible to carry out carbon trading in the world. Therefore, countries capable of performing protective functions and carry out reforestation, afforestation, and restoration, have the opportunity to be involved in world carbon trading. This study aims to determine the moisture content and carbon absorption rate of Binuang bini trees as a first step to regulate the allometric equation using destructive and laboratory analysis. The results show that the water content in the roots, leaves, as well as the base, middle, and tip of the stem were: 73.69%, 68.39%, 65.59%, 61.22%, and 66.26%, respectively. Furthermore, the sample test results indicate a very close relationship between carbon concentration and absorbance in the O. sumatrana tree with a simple linear regression equation: Y = 0.002X + 0.0593 with R2 = 0.9896. Therefore, this regression equation can be used to calculate the carbon concentration sample for the O. sumatrana tree fraction. The carbon content in 3 tree samples with a breast height diameter of 9.24 cm, 10.08 cm, and 11.68 cm was 2,585 kg. 2,913 kg, and 4,654 kg, respectively. In addition, the carbon sequestration for each tree diameter per year is 1.581 kg year-1, 1,782 kg year-1and 2,847 kg year-1, respectively.
MASTER RECESSION CURVE VISUALIZATION USING SEVEN BASEFLOW RECESSION MODELS IN PAIRED WATERSHEDS Latuamury, Bokiraiya; Mardiatmoko, Gun; Kastanya, Agustinus
Jurnal Teknosains Vol 14, No 1 (2024): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.90705

Abstract

River flow recession analysis plays a crucial role in understanding how watersheds release water during dry periods. Consequently, modeling baseflow recession is closely related to the characteristics of unconfined aquifers, storage behavior, and the discharge properties of the watershed. While several theories exist on modeling recession curves, limited research has compared different approaches regarding baseflow recession characteristics. This study aims to model seven baseflow recession equations in paired watersheds in Ambon City. The research methodology involves calibrating seven baseflow recession models using the Recession Curve (RC) 4.0 Hydro Office software. The tested models include Linear Reservoir, Exponential Reservoir, Double Exponential Horton, Dupuit-Boussinesq Aquifer Storage, Depression Storage, Turbulent Flow Model, and Hyperbolic Function Model. The calibration results yield optimal combinations of recession parameters. The parameterization order from highest to lowest is as follows: Depression Storage, followed by the Hyperbolic Function, Exponential Reservoir, Turbulent Flow Model, Double Exponential Horton, Linear Reservoir, and Dupuit-Boussinesq Aquifer Storage. Quantifying baseflow recession constants and coefficients is essential for understanding baseflow behavior. Visualizing the slope of the Recession Curve (MRC) reveals that models with high recession constants tend to have gradual MRCs, while low recession constants result in steep MRCs. The MRC slope further describes the relationship between storage conditions and discharge from the watershed. The advantage of creating MRCs from discontinuous recession segments lies in their ability to appropriately describe the MRC process and provide quantitative parameters relevant to drainage mechanisms. MRCs also serve as an optimal automated computational tool.
ANALISIS PENDAPATAN PRODUKSI SAGU (Metroxylon Sagu) DI NEGERI RUTONG KECAMATAN LEITIMUR SELATAN KOTA AMBON Matayane, Esterlina; Kastanya, Agustinus; Siahaya, Troice
MARSEGU : Jurnal Sains dan Teknologi Vol. 1 No. 10 (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/1.10.2025.1085-1094

Abstract

The aim of the research is to understand the contribution of farmers to production and the factors that influence sago (Metroxylon sago) production in Negeri Rutong, South Leitimur District, Ambon City. The research method used is the survey method. The results of the research show that the income of Sago (Metroxylon sago) production farmers in Rutong State contributes IDR 235,625,000 (57.85%) with an average per month per Head of Family of IDR. 785,417. Farmers' income outside of sago production (Metroxylon sago) or side income is IDR 171,671,000 (42.15%) and the average per month per head of family is IDR. 572,237. Sago production income (Metroxylon sago) in Rutong country has a very large contribution value when compared to the value of income outside sago production (Metroxylon sago). If converted into monthly time units, the income is IDR IDR. 785,417 lower than Ambon City's UMK of Rp. 2,991,299.
Potret Kehidupan Suku Togutil dan Kearifan Lokal Khususnya Obat-Obatan Tradisional dari Hutan Bayau, Edom; Kastanya, Agustinus; Pelupessy, Piter
MAKILA Vol 13 No 1 (2019): Makila : Jurnal Penelitian Kehutanan
Publisher : Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (425.271 KB) | DOI: 10.30598/makila.v13i1.2322

Abstract

The study was conducted to find a portrait of the life of the Togutil tribe and the use of forest products in the form of medicines that are used as their daily needs. This study used descriptive qualitative method. The purpose of descriptive research is to describe and understand the behavior patterns of a community as it is in the context of wholeness or a unified whole, and the results of the study show that the existence of the Togutil tribe is still highly dependent on the forest. The use of medicines is hereditary knowledge which is still maintained because it is proven by what is directly accepted by the community.
Hubungan Modal Sosial Kognitif Terhadap Performansi Dusung di Desa Murnaten Kecamatan Taniwel Parera, Anjely A.; Kastanya, Agustinus; Tjoa, Martina
MAKILA Vol 15 No 1 (2021): Makila : Jurnal Penelitian Kehutanan
Publisher : Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (471.386 KB) | DOI: 10.30598/makila.v15i1.3266

Abstract

Dusung performance is the condition and performance of dusung management managed by the community of dusung owners, as measured by productivity, sustainability, fairness, and efficiency. This study analyzes the rank-spearman correlation between cognitive, social capital to dusung performance in Murnaten Village, Taniwel District, West Seram Regency. Rank-Spearman's correlation results show that the relationship between cognitive, social capital (trust, cooperation, and solidarity) and performance (productivity, efficiency, sustainability, and fairness) overall shows a direct and quite strong relationship. It is supported by the values and norms that apply in society that are maintained as ancestral heritage.
POTRET SOSIAL EKONOMI BUDAYA MASYARAKAT SEKITAR HUTAN (KASUS PULAU BANDA BESAR) KECAMATAN BANDA NEIRA KABUPATEN MALUKU TENGAH Latar, Choirul Fachril; Kastanya, Agustinus; Iskar, Iskar
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.v17i2.5233

Abstract

This study aims to determine the socio-economic, cultural conditions, and income levels of communities around the forest on Banda Besar Island. The research results show that the community's economic condition depends on forest products managed through gardening (Agroforestry). Data collected through observations and interviews was then analyzed descriptively, qualitatively, and quantitatively. The research results show that the community's economic condition depends on forest products managed through Agroforestry. The social culture of the people on Banda Besar Island is very open to the outside world; the people do not differentiate between immigrants and natives, and ethnic mixing occurs very quickly. Some cultural traditions of communities around the forest include washing wells, buka puang, kombak, papaito, belang, cakalele, and the nutmeg-picking dance. The income of communities around the forest from managing forests using an agroforestry system can increase community income from three types of commodities, namely nutmeg, cloves, and walnuts, obtaining a total average income for communities around the forest of Rp. 16,082,667,-KK/Year and an average.
Analisis Vegetasi Hutan pada Zona Pemanfaatan di Pulau Nusalaut Palapessy, Astrid; Kastanya, Agustinus; Irwanto, Irwanto
MAKILA Vol 19 No 1 (2025): MAKILA: Jurnal Penelitian Kehutanan
Publisher : Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/makila.v19i1.14023

Abstract

Small islands possess considerable ecological and economic potential, particularly in the management of forest resources. However, unsustainable forest management practices frequently undermine the integrity and resilience of these ecosystems. Implementing zoning strategies, specifically through the establishment of utilization zones, presents a viable solution for promoting the sustainable use of forest resources. This study analyzes the vegetation structure within the utilization zone of Nusalaut Island, which is located at elevations ranging from 0 to 100 meters above sea level and is characterized by intensive activities such as forest resource exploitation and plantation development. The primary objectives of this research are to assess the Importance Value Index (IVI) and evaluate species diversity across different vegetation strata within the utilization zone. A combined transect and grid sampling method was employed, and data analysis utilized standard vegetation assessment techniques to calculate IVI and species diversity indices. The results reveal that the forest vegetation in the Nusalaut utilization zone comprises four growth stages: seedlings, saplings, poles, and mature trees, with species composition varying across strata and villages. The highest species richness was observed in the seedling stage (16 species in Ameth and Akoon), sapling stage (17 species in Abubu and Ameth), pole stage (18 species in Titawai), and tree stage (20 species in Akoon). The calculated IVI values varied significantly across growth stages, indicating a heterogeneous distribution of dominant species. Overall, species diversity within the utilization zone of Nusalaut Island is classified as moderate, reflecting a relatively balanced yet potentially vulnerable ecosystem that necessitates careful management to ensure the sustainability of its ecological functions.
Potensi Danau Faunil sebagai Sumber Air Bersih di Kota Tual: Analisis Kualitas, Kuantitas, dan Tantangan Keberlanjutan Pengelolaan Derlauw, Nanang S; Kastanya, Agustinus; Latuamury, Bokiraiya
MAKILA Vol 19 No 2 (2025): Makila : Jurnal Penelitian Kehutanan
Publisher : Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/makila.v19i2.20507

Abstract

This study evaluates the sustainability of Lake Faunil as the principal freshwater source for Tual City, located in a small-island environment characterised by limited groundwater reserves and increasing hydrometeorological vulnerability. Employing a quantitative–descriptive approach, the research analyses ten years of water-quality data—covering BOD, COD, DO, pH, and TDS—alongside seasonal discharge records to examine spatial and temporal dynamics. The results reveal that pH and TDS remain within the Class II water-quality standards established under Government Regulation No. 22/2021, indicating chemical stability and low salinity. In contrast, BOD and COD have consistently exceeded permissible limits since 2018, suggesting chronic organic pollution primarily linked to unmanaged domestic wastewater inflows. Dissolved Oxygen (DO) concentrations during the dry season frequently drop below 4 mg/L, signalling hypoxic stress and early eutrophication processes. Concurrently, discharge data demonstrate a declining trend, with dry-season flows decreasing to as low as 0.036 m³/s, reflecting the system’s strong dependence on rainfall and declining catchment capacity. A subsequent SWOT analysis substantiates these findings by identifying inadequate sanitation systems, riparian degradation, and weak institutional coordination as major internal constraints, while external opportunities include regulatory support, climate and public financing schemes, and the potential role of traditional institutions such as the Saniri Negeri in ecological governance. The study recommends adopting an Integrated Water Resources Management (IWRM) framework that integrates nature-based restoration, community-based sanitation and monitoring, and seasonally adaptive water allocation. Collectively, these strategies provide an evidence-based foundation for policy interventions to enhance freshwater security and resilience within climate-exposed island urban ecosystems.
Co-Authors Bayau, Edom Bokiraiya Latuamury Derlauw, Nanang S Gun Mardiatmoko Irwanto Irwanto Iskar, Iskar Kailola, Jacob Latar, Choirul Fachril Matayane, Esterlina Palapessy, Astrid Parera, Anjely A. Pelupessy, Piter Radios Simanjuntak Tjoa, Martina Troice E Siahaya