Jurnal Manajemen Hutan Tropika

Time Consumption and Productivity of Sandat Felling Technique in Agroforestry Private Forests in Probolinggo, Indonesia

2024-04-05T13:24:00+07:00

Agroforestry is a cropping pattern that is commonly applied to private forest management in Indonesia. Agroforestry based private forest is a land-based silviculture that incorporates forestry plants with agricultural crops, plantation crops, and multi-purpose plants. One of the felling techniques used in agroforestry based private forests is the sandat-felling technique (SFT), which is a rope-assist felling technique. The felling technique was used to protect the remaining stand of the agroforestry based private forest. This technique is an innovation in the harvesting of agroforestry based private forests in Indonesia. The time consumption and productivity of this technique are not yet known. This study aims to assess the working time and productivity of SFT in agroforestry based private forests in Probolinggo, East Java, Indonesia. The observed tree-felling technique included rope installation and tree-felling operations. The performance of the SFT was evaluated by analyzing its working time and productivity. The results of the study showed that the total working time of the SFT was 8.65 minutes tree^-1, which consisted of 33.34% for rope installation and 66.66% for felling operation. The productivity of the SFT was 2.02 m³ hour^-1.

Knowledge Management System For Forest and Land Fire Mitigation in Indonesia: A Web-Based Application Development

2024-04-05T13:23:59+07:00

Forest and land fires in Indonesia have serious impacts on many aspects, including the environment, health, economy, politics, and international relations. They cause haze pollution that extends to neighboring countries and peatland degradation. Despite extensive research and mitigation efforts, forest and land fires continue to occur and cost lives. Therefore, effective management and mitigation strategies are required. This research developed a web-based knowledge management system (KMS) using the Laravel framework as an effective forest and land fire mitigation platform. The KMS aims to support decision-making, facilitate knowledge exchange, improve coordination between stakeholders, and expand access to relevant information, while maintaining the sustainability of forest and land resources in Indonesia. The KMS evaluation results cover two important aspects: blackbox evaluation and performance evaluation. The blackbox evaluation showed that KMS provides knowledge retrieval features based on expert knowledge. The performance evaluation revealed that the KMS provides easy and quick access to information on forest and land fire prevention and management. Thus, this research has great potential to help overcome the problem of forest and land fires in Indonesia and protect the environment and society from their adverse effects.

Edge Effect on Bird Community in Ternate, North Maluku, Indonesia

2024-04-05T13:24:03+07:00

The edge is a meeting place between two ecosystems, or it can also be interpreted as a boundary where two habitats meet and interact. The presence of edges can create an edge effect and increase richness and species abundance. In the present study, we analyzed how edge and vegetation diversity affect a) bird communities and b) how birds respond to edges. Observation plots were placed in jamblang stands and coconut plantations (edge and interior). Bird communities were observed using point counts with a fixed radius of 25 m, and the distance between plots was 50 m. A survey of vegetation diversity was conducted using a combination of the transect and plot methods. The research showed that the highest species richness and diversity of birds (128 individuals of 18 species) and vegetation (168 individuals of 20 species) were found at the edge, although there were only slight differences in the number of species in each habitat. This was influenced by the structure and composition of the vegetation at the observation site. Nevertheless, this proves that the edge effect shapes the composition of bird communities. There are 9 species of bird can be mapped into 4 response models: generalis neutral, generalist edge exploiter, specialist edge exploiter, and edge specialist.

Potential Criteria to Determine a Waqf-Based Forest Location

2024-04-05T13:23:59+07:00

Waqf-based forests can conserve the forest ecosystem by applying waqf principles. This initiative has been implemented in several places in Indonesia. The limited funds available for waqf-based forest development require nazhir to carefully choose the best location so that the asset can function optimally. However, no specific research has been conducted to guide the selection of the best location for this purpose. This study aimed to identify potential criteria to help determine the best site for developing a waqf-based forest. Several methods were used to collect the necessary data, including literature reviews, in-depth interviews, field observations, and focus group discussions. This study identifies four crucial criteria when selecting the best locations: a) legal, b) physical and biophysical, c) high conservation value and benefits, and d) management. In addition, each criterion has sub-criteria. Among all, legal issues receive the highest highlight as unresolved regulations can affect a forest's ownership and function. This study was the first to discuss these criteria. Future research should quantify the criteria suggested using GIS and conduct more field observations in existing waqf-based forests in Indonesia.

Diversity of Collembola on Various Post-Rehabilitation Land Covers

2024-04-05T13:23:58+07:00

The success of rehabilitation has altered environmental conditions from critical land to new habitats for living organisms. One of the representative and sensitive mesofauna to environmental changes is Collembola. Various vegetation cover almost all of the rehabilitation area, which has impacts on microclimate and soil quality as important factors to Collembola existence. This study investigated the diversity and abundance of Collembola and its relation to environmental factors on various land covers, including teak, grass, and mixed stand land cover. Data were collected in an observation plot of 20 m × 20 m using purposive samples, including environmental measurements, Collembola collection, and soil samples for physical and chemical analysis. The results showed that different land covers affected the abundance and diversity of Collembola, even though the statistical analyses of TLC, GLC, and MLC were not significantly different. However, TLC has a higher litter thickness and organic material than the other land cover types. A few families of Collembola, such as Cyphoderidae, Brachystomellidae, Katiannidae, Isotomidae, Oncopoduridae, and Isotogastruridae, show their correlation to climatic and edaphic factors in a certain land cover.

Identifying Important Areas for the Release of Five Endemic Species in a Mountainous Landscape: Inference from Spatial Modeling Techniques

2024-04-05T13:23:57+07:00

Efforts to release animals resulting from evacuation and rehabilitation into their natural habitats are important practices in wildlife conservation. Before releasing the animals, it is important to assess the habitat suitability of the areas to support the existence of the animals in the long run. Yet, there is limited study of habitat suitability assessment on national parks as release locations for wild animals. This study aimed to assess the suitable habitat of five charismatic animal species, i.e., Panthera pardus melas, Hylobates moloch, Prinonailurus bengalensis, Nycticebus javanicus, and Nisaetus bartelsi, in Gunung Halimun Salak National Park using Maxent, and to determine potential locations for releasing animal’s species. Models for the P. p. melas show 47,619 ha and 21,391 ha, respectively, suitable as habitat and potential release location, for H. moloch, each is 57,537 ha and 33,471 ha, for P. bengalensis, each is 25,460 ha and 17.189 ha, for N. javanicus, each is 29,848 ha and 15,578 ha, and for N. bartelsi, each is 44,426 ha and 25,660 ha. Our study shows that a suitable habitat can be critical in choosing a wildlife release site. Further consideration of conflict mitigation and practicalities is required to achieve the long-term existence of released species.

Public Perceptions on the Importance of Ecosystem Services From Vulnerable Forest: A Case Study of Ampang Forest Reserve, Selangor, Malaysia

2024-04-05T13:23:55+07:00

Forest reserve gazettement affects the sustainability of forests by altering their ecological function and threatening human livelihood. This study examines a recently degazetted forest, using a survey among 120 local respondents living near Ampang Forest Reserve (AFR) in Selangor, Malaysia. The simple random sampling technique was implemented to reduce sampling bias, and descriptive and correlation statistics were used in the analysis. The study aims (i) to examine the public perceived importance of forest ecosystem services from AFR, (ii) to determine public awareness of a range of environmental threat levels towards AFR’s ecosystem services, and (iii) to assess public agreement on conservation measures that could increase protection and ensure the sustainability of ecosystem services from the remaining area of AFR. The result revealed all ecosystem services were perceived as important, and the public was mostly aware of the environmental threats. At the same time, conservation measures should be implemented to protect and ensure the sustainability of ecosystem services from AFR. This study provides insight into public perceptions of the importance of forest ecosystem services derived from vulnerable forest reserves. It indicates the relevance and need for better protection in high-risk forest areas as local livelihood depends on its significant ecological roles.

Land Use, Built-Up, and Vegetation Index in North Halmahera Regency through Spatio-Temporal Analysis

2024-04-05T13:23:56+07:00

Monitoring land use, buildings, and vegetation index of ecotourism areas in North Halmahera can support planning space utilization in urban areas for tourist areas as the concept of land use management and urban planning. This study offers ideas for analyzing the distribution of buildings, vegetation index, and land use in the mangrove ecotourism area of North Halmahera Regency using the spatio-temporal analysis method. The spatio-temporal analysis method comprises several stages: data selection, preprocessing, data integration, spatial analysis, temporal analysis, spatio-temporal analysis, data visualization, interpretation and understanding, and data visualization. The results of this study show that changes in the livelihood strategy of local people, from farmers and fishermen to traders, also affect land use patterns, from agricultural activities to economic activities, which triggers an increase in the number of buildings for production activities to product distribution. The implications of these findings on ecotourism development programs and policies and infrastructure development in the North Halmahera Regency are to consider community livelihoods and space or land use behavior in ecotourism areas based on vegetation, soil, and building index values. Thus, the intensification of building distribution and changes in vegetation index values from 2013-2023 reflect changes in people's livelihood strategies from agrarian activities to trade and from fishermen's activities to tourism transportation service providers.

Economic Analysis of Forest Management for Timber Production and Agricultural Production in Hillside Watershed Areas of Madagascar: A Case Study of the Itasy Region

2024-04-05T13:24:01+07:00

In hillside watersheds, forests play a crucial role in protecting against soil erosion. Not only does forest vegetation cover serve as a biological measure to prevent soil erosion, it also generates income through sustainable management practices. However, there is a scarcity of research that evaluates and compares the profitability of perennial woody crops with that of other agricultural crops by integrating biological aspects within an economic analytical framework in Central Madagascar. In this study, we address this gap by combining a biological growth model that captures complex forest dynamics with economic management data to utilize the discounted cash flow method. We applied this approach to evaluate and compare the profitability of forest management and agricultural crop production in the hillside watershed areas of Central Madagascar, which have experienced severe human-induced soil erosion. Although our results showed that timber production is a profitable option, other agricultural crops generate much higher profits, indicating that financial subsidies alone may not be enough to shift land use toward perennial woody crops. In addition, growing fruit trees such as oranges and mangoes appears to be a much more financially attractive option for local farmers than annual agricultural crop production.

A Changing Landscape: Exploring the Relationship between Clean and Clear Status Policy, Coal Mining, and Deforestation

2024-04-05T13:24:02+07:00

Coal plays a crucial role in energy generation in developing nations and serves as a vital source of power amidst growing energy demands. However, coal mining often acts as a primary driver of deforestation and poses significant environmental challenges. Indonesia, a country with extensive forest areas and a significant coal producer, has implemented a Clean and Clear status policy to address regional and administrative issues related to mining permits. This study aims to assess the impact of this government permit for coal mining in forest areas using the fixed effect panel data method, offering insights into the relationship between coal mining activities and deforestation trends. The analysis focused on the period from 2010 to 2019 and covered 110 regencies in Indonesia, providing a comprehensive understanding of the spatial and temporal dynamics of forest loss. The estimation findings indicated a negative correlation between the areas allocated for coal mining concession permits and forest areas, underscoring the need for stringent regulations and effective land management practices. Therefore, it is recommended that the Clean and Clear status policy not only be applicable during the permit granting phase, but also prioritize post-mining periods to ensure the completion of land reclamation activities.

Development of Land Cover and Carbon Storage in Plawangan Hill of Gunung Merapi National Park, Yogyakarta, Using Landsat Data Series 2009, 2013, 2017, and 2023

2024-04-05T13:24:02+07:00

Globally, habitat loss, deforestation, and climate change are mostly caused by land cover changes (LCC). The amount of land covered by trees has had a major impact on global warming and climate change. Increasing the amount of land cover helps to mitigate climate change and global warming. This study aims to investigate the changes in land cover and carbon storage in Plawangan Hill, Indonesia, over four years (2009, 2013, 2017, and 2023). The study site was defined as a conservation area that has been periodically impacted both directly and indirectly by volcanic eruptions. Images from Landsat 7 and 8 were used to collect data. Additionally, land cover changes were assessed using the forest canopy density (FCD Mapper) model, which was then utilized to quantify the carbon storage of the research site. The findings demonstrated fluctuations in land cover changes between 2009 and 2023. Additionally, changes in land cover have a direct impact on changes in carbon storage. The age of the trees, type of vegetation, succession stage, and history of eruptions were the variables that were apparent to be the main causes of these changes.

Variation of Phenology of Flacourtia rukam in Two Different Habitats and Their Relation to Rainfall, Dry Days, and the Plant Water Status

2024-04-05T13:23:57+07:00

Phenological shifts in the emergence of vegetative and generative parts, occur due to the response of plants to water received due to climate change. The rukam tree (Flacourtia rukam (Zoll & Moritzi)) is a local Indonesian plant with potential as an edible fruit and antioxidant agent, but its existence is increasingly rare. F. rukam can be found in Pasuruan, East Java, including Purwodadi Botanical Garden (PBG) as collected plants and Sekarmojo Village as cultivated plants. These populations show a shift in phenology, but this has never been studied. This study aimed to analyze the spatial variation of the phenology of two rukam populations and its relation to plant water status, rainfall quantity (RQ), and drought days (DD). This research was conducted on two individual trees at each location, was conducted from August 2020 to October 2022 using secondary data from BMKG, such as daily rainfall and the number of days without rain. Phenology was directly observed every week with an estimated abundance of numbers 1-4; plant water status was observed by calculating relative water content (RWC); soil physical analysis was carried out in mid-season. Data were analyzed by Mann-Whitney test and SEM WarpPLS. The results showed differences in phenology in the phases of leaf fall, flower buds, young fruit, and ripe fruit on the trees in the different locations. The decreased RQ in the past month significantly reduced the RWC value of F. rukam in both places, while the number of DD contributed to a decrease in the RWC value in PBG only, not in Sekarmojo. In both sites, decreasing the RWC of the rukam increased the abundance of fallen leaves and the chances of flowering. Rainfall and drought days affected plant phenology directly or indirectly through RWC mediation. In both places, RQ had a direct positive and significant effect on blooming flowers and new leaves but had negative effect on fallen leaves. While DD had a positive effect on leaf fall, flower formation, and fruit ripening, but had a negative effect on the appearance of young fruit (in PBG). Indirectly, RQ mainly affected several phenological parameters, while DD did not affect all phenological parameters.

Risk Management Literacy Level among Oil Palm Smallholders in Malaysia

2024-04-05T13:23:53+07:00

Risk management literacy is very important in influencing an individual's decision-making when taking preparatory steps to handle the anticipated risks. This includes oil palm smallholders who are constantly exposed to various types of risks. Therefore, this study aims to analyze the level of risk management literacy among oil palm smallholders in Malaysia. The data of the study was obtained from the online questionnaires distributed to oil palm smallholders using a random sampling method. The data obtained from the final sample of 200 smallholders were analyzed to examine the level of risk management literacy among palm oil smallholders using mean score analysis. The results found that the risk management literacy level among oil palm smallholders in Malaysia is at a moderately high level. Furthermore, mean score for the preference of saving instead of expenditure was the highest i.e. 4.40, indicating that smallholders possess high awareness on the importance of saving as one of the tools for risk management. The study’ findings allowed relevant authorities to formulate new programs such as training and awareness campaign of risk management, on continuous basis. It could assist smallholders to prepare for any potential risks and subsequently be able to create sustainable sources of income.

Growth, Yield, and Stem Quality of Tectona grandis Grown with Different Spacings at Longuza Forest Plantation, Tanzania

2024-04-09T11:34:47+07:00

Spacing is a silvicultural practice that affects the growth of trees in forest plantations. However, the yield depends on growth, which is determined by spacing. In addition, spacing influences the quantity of the final crop available for harvesting, specifically in forest plantations for sawlog production. Spacing is also used as a management practice to control the quality of trees, as dense stands are expected to have trees with good stem quality. However, little has been done to address the effects of spacing on the growth, yield, and stem quality of Tectona grandis until final harvesting age. Teak plantations in Tanzania are grown at a rotation age of 20 years. Thus, this study aimed to assess the effect of spacing on the growth, yield, and stem quality of 24-year-old T. grandis in a Longuza Forest plantation in Muheza, Tanzania. Data were collected from a spacing trial using a randomized complete block design with three treatments: 2 m × 2 m, 3 × 3 m, and 4 m × 4 m, with three replications. The growth and yield parameters assessed were diameter at breast height (dbh) total tree height, and stem quality. Data were analyzed to obtain the basal area, volume, and mean annual increment. Statistical analysis was performed using analysis of variance (ANOVA), and multiple comparisons among treatment means were performed using Tukey's honest significant difference test (p-value = 0.05). The results showed that spacing did not significantly affect growth and yield parameters. The stem quality was significantly different in some treatments. The highest dbh and height growth were observed at 4 m× 4 m spacing. The highest values of basal area, volume, and mean annual increment were observed at a 3 m× 3 m spacing. Stem quality differed significantly between the 2 m× 2 m and 4 m× 4 m spacings. Because teak plantations in Tanzania are aimed at sawlog production, it is recommended to continue practising a spacing of 3 m× 3 m, which will ensure a higher mean annual increment with a higher volume at the stand level. In addition, a spacing of 3 m × 3 m ensured a higher percentage of trees with good stem quality.

Optimizing DNA Extraction and Selecting Suitable Regions for Biodiversity Assessment: A Study on Shorea leprosula

2024-04-05T13:23:55+07:00

The extraction method plays a crucial role in obtaining high-quality DNA samples, which is indispensable for various molecular biology techniques and analyses, enabling a deeper comprehension of genetic information and biological processes. The objectives of the study were: a) to optimize the chloroplast DNA extraction protocol by comparing modified CTAB methods and GeneAid for both leaf and wood samples of Shorea leprosula, a major commercial timber species, and b) to identify a suitable cpDNA region that exhibits variability and universality across taxa. Total DNA was analyzed by gel electrophoresis followed by Sanger sequencing to determine the amplification success. The results revealed that trnL intron, trnL-trnF, and trnG yielded readable sequences of the expected length (maximum 586 bp, 480 bp, and 908 bp, respectively), while the rps 16 intron failed to assemble a contig. The petL-psbE region provided long readability for reverse sequences (769 bp) but not for the forward sequence (195 bp). Higher successful DNA extraction was achieved from the leaves compared to the woods. The lower sequencing quality may be attributed to suboptimal primer design, the structural features of the regions resulting from extensive repetitive sequences, and the suboptimal condition of the extraction method in eliminating wood chemical compounds.

Growth of Betung Bamboo (Dendrocalamus asper) and Food Crop Production Under Agroforestry Bamboo Systems

2024-04-05T13:24:01+07:00

One of the main species in community forests is betung bamboo (Dendrocalamus asper). Optimizing land use under bamboo can be achieved by cultivating food crops. This research aimed to determine the growth of betung bamboo and the production of food crops. The experimental design used a split plot design with four cultivation patterns as the main plots: agroforestry bamboo pattern i.e. agroforestry bamboo + rice (P1), agroforestry bamboo + rice + cassava (P2), agroforestry bamboo + rice + taro (P3), and mixed food crops (rice + cassava + taro) (P4), while the subplots were rice varieties: rindang 2 (V1), protani (V2), and unsoed (V3). The observed parameters were bamboo growth, soil fertility, and food crop production. The results showed that seven-year-old betung bamboo had an average of 6.01 mature stems per clump, an average plant height of 7.23 m, and a stem diameter of 7.12 cm. The numbers of young stems and shoots per clump was 1.45 and 3.71. The highest betung bamboo growth was in the agroforestry pattern (length: 8,49 m, diameter: 7.17 cm, thickness: 1.95, total weight: 21.31 kg). The highest rice yield was observed in the P2V1 treatment (4.17 kg). The highest cassava tuber yield per plant was observed in P4 (2.12 kg). The taro tuber yield was relatively higher in the agroforestry pattern with a distance of >1 m from the bamboo clump (0.52 kg plant-1). The land equivalent ratio (LER) and area time equivalent ratio (ATER) of bamboo and food crop agroforestry have a value above 1, so it is more efficient in land.

Front-matter

2024-04-05T13:24:00+07:00

https://doi.org/10.7226/jtfm.30.1.fm

Back-matter

2024-04-05T13:24:00+07:00

https://doi.org/10.7226/jtfm.30.1.bm