Jurnal Manajemen Hutan Tropika
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Tree Architecture Model and Tree Health Assessment Using Sonic 3D Tomograph Relationship in Bali Botanic Garden
Full text linkThe incident of fallen trees or broken branches is dangerous for tourists visiting Bali Botanical Garden. Tree health monitoring in locations with high human activity and near valuable properties is mandatory to minimize the potency of tree failure. Since the stand stability is influenced by biological and physical factors, multiple variables consisting of species characteristics (stem form), tree dimensions (height, diameter, and slenderness coefficient), and tree health were used as parameters of tree health. The aim of this study is to examine the health condition of trees located in XIV.G Bali Botanical Garden and to identify the most significant morphological character related to the result of tomograph measurement. A purposive sampling technique was adopted for locations which highly visited. A total of 80 trees were examined as samples to measure tree health. The evaluation used visual observation and tomograph technology. The result showed the most tree defect found were branches covered with epiphyte and moss. However, tomograph examination found only one tree classified at high risk (Bischofia javanica) and seven trees classified at medium risk (Syzygium polyanthum, Syzygium racemosum, Bischofia javanica, Pittosporum mollucanum, Pittosporum sp. and Dacrycarpus imbricatus (2 trees)). This study suggests the use of tree architecture model as the most significant morphological character on tree samples with medium decay.
 
Food Crop Land Allocation: Integrating Land Suitability Analysis and Spatial Forestry, Study Case Katingan, Indonesia
Full text linkThe Indonesian government strives to expand agricultural lands, primarily beyond Java, through food estate programs. However, there has been a strong likelihood that this endeavor might intersect with forests and forest designation areas. This study aims to determine land suitability and its potential allocation for food crops at the interface of forestry and agriculture in Katingan District. Paddy (Oryza sativa L) and sorghum (Sorghum bicolor L) were selected as the crop species being analyzed, employing a coupling of the analytical hierarchy process and GIS. Forest area designation and land cover maps were incorporated into land allocation scenarios. The results showed that there were 74.254 ha in the "highly suitable" (S1) class and 130.634 ha in the "moderately suitable" (S2) class for paddy. However, after applying the scenario, they decreased by 4% and 12%, respectively. Sorghum has S1 and S2 areas of 108.956 ha and 377.493 ha, which declined by 15% and 14%, respectively, after scenario. Based on the allocation scenario, we found potential deforestation of 67 thousand ha for paddy and 205 thousand ha for sorghum, respectively. We highlighted convertible production forests (HPK) and production forests (HP) as having considerable potential for the allocation of land for food production
Forest Land Change Assessment of Karang Mumus Sub-Watershed Area
Full text linkKarang Mumus watershed is an important area as a port and gateway to the inland of East Kalimantan, causing the trade sector and water transportation services in this city to be very developed. Traders and immigrants from various regions who came in, stopped by, performed business, and stayed have caused the riverbanks to develop into economic and trade centers. One of the issues in the Karang Mumus sub-watershed is the conversion of forest area to agricultural land. With the improper use of agrotechnology and soil conservation, agricultural operations result in erosion and reduced land yield. This study aims to evaluate the Karang Mumus sub-potential watersheds to support land capability by using the overlay method (geoprocessing) of a geographic information system (GIS) based on criteria for classifying land capabilities and a data analysis approach. The findings revealed that the Karang Mumus sub-land watersheds primarily are categorized as land capacity class III, with a moderate erosion limiting factor that covers 15,864 ha (50.45%). The remaining areas are categorized into land capability classes IV and VI, with class IV having a severe slope limiting factor and class VI having a severe slope limiting factor with a fairly strong soil sensitivity to erosion, covering 8,751.14 ha (27.83%) and 6,829.85 ha (21.72%), respectively. Class III land is recommended for agricultural cultivation, application of appropriate agro-technology, and soil and water conservation. This study recommends that class IV and VI lands area are used for community forests or plantation forests managed by government agencies involved in the forest area stabilization center (BPKH) Region IV Samarinda.
 
Financial Analysis of Beekeeping Practices at Acacia crassicarpa Plantation Forest in Riau Province, Indonesia
Full text linkOne environmental service provided by A. crassicarpa plantation is extrafloral nectar which has been widely used for beekeeping since 2019. Nevertheless, nowadays between apiaries practiced unfair competition since there were price fall led by oversupply and low demand after covid pandemic ended. Thus, evaluating the cost structure, profitability, and its feasibility value are critically required. The study\u27s objectives were to 1) evaluate cost structure, revenue and profitability and 2) to conduct a feasibility analysis of each apiary type. This study was conducted from in 2019 to 2022 at the Siak Regency, Riau, Indonesia. Structure interviews combined with desk studies were carried out to collect the data. Data were analyzed based on cost structure, revenue, profitability, and feasibility analysis. All types of apiaries were feasible since they could cover variable and fixed costs. However, it revealed that all types of apiaries experienced minus in profitability in the fourth of financial year. In general, variable cost relatively increased to the level of 50% of total cost in the fourth year. In contrast, fixed cost was relatively declined to less than 50%. Apiaries managed two rits had a better performance in cost structure to face the competitive market followed by apiaries managed three rit. Meanwhile, apiaries managed rit one experienced such a difficult challenge to survive
Distribution Pattern of Shorea lepropsula Miq, Around the Forest Area With Special Purpose (KHDTK) Aek Nauli Indonesia
Full text linkShorea leprosula belongs to the Dipterocarpaceae family and grows in Indonesia\u27s tropical forests which have an economic and ecological role. They are a plant in tropical forests that is known as a producer of fruit and tengkawang oil. The presence of S. leprosula trees in the habitat naturally at this time was very hard to find and began to decrease in population. This study aims to determine the potential and distribution pattern of S. leprosula found around KHDTK Aek Nauli. The research method uses the plot path method measuring 20 m × 20 m, the total number of plots is 150 plots. The research results show that the potency of S. leprosula is 63.17 m3 ha-1. The highest important value index of S. leprosula at the tree level was 25.45%. The distribution pattern of S. leprosula at the sapling, pole, and tree levels was clustered, while the distribution pattern at the seedling level was random. The importance of information about the potential and pattern of S. leprosula to be known as an indicator of the current status of its population at KHDTK Aek Nauli and as an information basis for managing management S. leprosula for support preservation in the forest
Effects of Characteristics and Perceptions of Collectors of Non-Timber Forest Products to be Members of the Partnership Program: A Case Study at Bukit Barisan Selatan National Park, Indonesia
Full text linkConservation partnerships are institutional innovations for self-empowering so that people are no longer dependent on forest areas. Initially, it regulated the relationship between the rights of non-timber forest product collectors (NTFPs) and their obligation to maintain sustainability, such as in the Bukit Barisan Selatan National Park (BBSNP). The high interest in becoming members has not been matched by the optimal implementation of the program that has been implemented since 2018 in the BBSNP traditional zone. Characteristics and perceptions are considered to have an influence on people\u27s behavior in utilizing NTFPs and being interested in becoming members of the partnership. The aim of this research is to analyze the influence of community characteristics and perceptions on the utilization of NTFPs and their desire to become members of the partnership. Data collection used interviews and literature studies, analyzed statistically inferentially in December 2022 by testing the partial least square structural equation modeling (PLS-SEM) hypothesis using the Smart PLS.4.0 software for students with a sample of 62 respondents, namely the partnership permit applicant community. The results of the hypothesis test showed that the characteristics and utilization of NTFPs variables influenced the community\u27s interest in becoming members of the conservation partnership. Perceptions affect the utilization of NTFPs variables. The use of NTFPs acts as a mediator between perceptions and interest in becoming a member. Misperceptions about conservation partnerships affect the implementation of the program. When public perceptions are improved through outreach activities, coaching etc will shape the character of the community to develop livelihoods and productive activities outside the area and stimulate voluntary leaving of the area without social conflict with area managers
Livelihood Sustainability Assessment of Payment for Ecosystem Services Providers in Cidanau Watershed, Banten Province
Full text linkThe payment for ecosystem services (PES) scheme in the Cidanau Watershed, Banten Province, Indonesia has not yet quantified and reviewed its livelihood impacts on its providers after two decades of implementation. Therefore, this study maps the livelihood sustainability of PES farmers and non-PES farmers in the Cidanau Watershed using capital indexes based on the five livelihood capital assets of the DFID’s sustainable livelihood framework. The research used a quantitative method to formulate the livelihood capital indexes (LCI) as approximates to the subjects’ livelihood sustainability based on their livelihood information and draws implications from the results thereof. A total of 168 agroforestry farmers both from PES and non-PES groups were interviewed across 12 villages in the upstream area. The results show that both PES and non-PES groups share the same pattern of capital assets sustainability with the PES group having a slightly higher human capital asset. The overall LCI calculated for the PES and non-PES groups are 0.445 and 0.48, respectively. The livelihood of both groups is deemed as not yet sustainable. The farmers would have to develop their financial and human assets to attain more sustainable livelihoods and prepare themselves for adopting new types of PES in the future
Morphological Characteristics and Potential of Sago (Metroxylon spp.) in Lingga Regency, Riau Islands, Indonesia
Full text linkSago (Metroxylon) is one of the local food species with development potential. Lingga Regency is one of the potential locations for sago development. However, no research on the morphological characteristics and production of sago in Lingga Regency has been conducted. The purpose of this research is to determine the morphological characteristics and production of sago in Lingga Regency. This study\u27s sago plants came from six sago-producing villages. Before and after the sago trees were harvested, morphological characteristics and production were observed, with random sampling at each research site. Field observations on the potential of sago stands were conducted at the study site using the transect method with a single plot. Based on morphological characters there are two types of sago in Lingga: spiny and thornless sago. The morphological characteristics and sago production vary greatly between research sites. Sago stands have a production potential ranging from 3.37 to 14.55 tons ha-1. Because they have a starch content of more than 200 kg stem-1, the majority of sago accessions in Lingga are superior accessions with the potential to be further developed. Superior sago comes from the villages of Musai, Pekaka, Keton, and Teluk
Autopoetic Dynamics of the Illegal Logging System in Papua Forest
Full text linkIllegal logging in Papua\u27s forest areas has been a cause of unresolved degradation or deforestation and has developed into a complex problem. This study intends to elaborate on the complex dynamics of illegal logging in Papua, Indonesia, using Niklas Luhmann\u27s Social System theory. The findings of this study are expected to provide a better understanding of the complexities of illegal logging and to encourage stakeholders to respond with more appropriate decisions and policies in accordance with their respective roles and authorities. The results of the research show that illegal logging in Papua is a social system that is formed from a simplification of the meaning of forests by actors who are purely economic-oriented. In facing the pressure from efforts to eradicate this system, the system has been reproducing in an autopoietic manner through differentiation to penetrate all other social systems pointed toward handling illegal logging and sustainable forest management, especially the law enforcement system and the customary forest community system. The ability of autopoietic to reproduce makes this system very flexible and cannot be handled by a rigid and bureaucratic system for dealing with illegal logging. It is suggested that the system for dealing with illegal logging must also be transformed into one of an autopoietic nature through collaborative management.