Jurnal Ilmu Kehutanan

Front Matters

Diana Mahayani — Mon, 11 Nov 2024 14:53:51 +0700

The Economic Benefit of Gunung Merapi National Park for the Welfare of the Buffer Village Community

Nurani Dwi Harjanti, Dwiko Budi Permadi, Wahyu Andayani, Tri Atmojo — Thu, 15 Aug 2024 00:00:00 +0700

Gunung Merapi National Park (GMNP) is an inseparable conservation area from the surrounding community, as the buffer village community has used its existing forest resources. Therefore, this research aimed to identify the forest resources used by the buffer village community and assess the economic benefit value generated by GMNP. The economic benefits evaluation adopted the direct use value approach and market prices. The results showed that the community used water, firewood, grass, land, and sand. Utilization was conducted in utilization, traditional, and rehabilitation zones. These resource utilizations generated a value of IDR426,230,560,828/year, significantly contributing to the welfare of the buffer village community.

The Business Model Canvas Analysis for Honey Business Development at Situak Ni Loba Siarsikarsik Social Forestry Business Group, Lumban Julu District, Toba Regency

Eva Theresia Gurusinga, Oding Affandi, Rahmawaty, Rita Dalimunthe — Thu, 17 Oct 2024 15:45:06 +0700

Honey has numerous benefits and considerable potential for development within the Social Forestry Business Group (KUPS). In 2020, honey consumption in Indonesia increased to 60 grams per capita per year, leading to growth in the honey bee business. However, more research is needed to be done on developing business strategies for KUPS in North Sumatra Province. Therefore, this research aimed to formulate development strategies for the honey bee business in Situak Ni Loba Siarsikarsik KUPS, Toba Regency, using the Business Model Canvas (BMC) method. This descriptive qualitative research collected data through direct observation, interviews, discussions, and literature research to map the business model through the nine main elements of BMC, namely customer segments, value propositions, channels, customer relationships, revenue flows, main resources, activities, partnerships, and cost structure. The best strategy identified was to increase the value proposition, expand the strategic partner network, and improve market access. The findings highlighted the need to determine the specialty of the honey produced by the KUPS compared to other products, find cooperation partners for investment, and utilize technology and marketplaces to expand market share.

The Current Updates of the Progresses and the Challenges of Recognition of Customary Forests in Indonesia

Rikardo Simarmata — Thu, 17 Oct 2024 15:46:43 +0700

Around 30 million Indonesians are forest-dependent, comprising a large portion of customary communities. For generations, customary communities managed forests using customary arrangements as the normative system. However, the state legal framework required the communities to obtain legal recognition to exercise these traditional forest rights. Over the last seven years, the state has formalized hundreds of thousands of hectares of customary forest, which was unprecedented. Some suggested that the number needed to be increased and far less than the potential customary forest areas. Therefore, this research aimed to examine the primary cause and the subsequent impacts on the low number of recognized customary forests. Relevant data were obtained for analysis from documents and direct interviews. The result showed that customary tenure on forest resources coexisted with the state arrangements. The state recognized those customary arrangements through formalization. However, the ideological and political perception and the state's interests regarding customary communities have brought obstacles to that sound policy regarding recognition. This perception and interest further raised three issues regarding the current legal framework and its implementation: complex regulation, delayed processing time, and ambiguous standards.

Social Forestry in West Sumatra: A Review on Regulation and Its Implementation in Hutan Nagari Salibutan

Nurwansyah, Hariadi Kartodihardjo, Iin Ichwandi — Thu, 17 Oct 2024 16:14:42 +0700

Social forestry is a program designed to address tenure conflicts, improve community welfare, and enhance environmental quality. Achieving the objectives of social forestry is not only limited to obtaining permits but needs more advanced, concrete, innovative business development that anticipates future challenges and prospects. Therefore, this research aimed to analyze West Sumatra Governor Regulation No. 52/2018 on the Implementation of Social Forestry Facilitation and its practical application in Hutan Nagari Salibutan. Data collection in this research included in-depth interviews and a literature review, while data analysis used descriptive qualitative methods, content analysis, and policy implementation. The results showed that Governor Regulation of West Sumatra No. 52/2018 supported national policy by accelerating social forestry, resolving tenure conflicts, and synchronizing the roles of various stakeholders. This Governor Regulation served as the technical reference in the field, and it comprised facilitation, institutionalization, monitoring and evaluation, and financing. Additionally, the implementation of regulations in Salibutan Nagari Forest correlated with these provisions, as evidenced by the activities carried out by the Forestry Service and the social forestry acceleration working group in collaboration with the Nagari Salibutan forest management institution. The consistency between the regulation's content and field implementation reflected this correlation.

Characteristics of Fast-Growing Wood Impregnated Using Monoethylene Glycol and SiO Nanoparticles Against Fungal Attacks

Thu, 17 Oct 2024 16:15:22 +0700

Jabon (Anthocephalus cadamba) and Sengon (Falcataria moluccana) were fast-growing wood species widely planted in the community forest. Both kinds of wood have low durability even though they can potentially be used in the carpentry material industry. Therefore, this research aimed to analyze the vacuum-pressure impregnation effect using monoethylene glycol (C₂H₆O₂) or MEG and silica dioxide (SiO₂) nanoparticles on wood resistance to fungal decay. The results showed that impregnation treatment with MEG and SiO₂ nanoparticles significantly improved the durability of Jabon and Sengon against fungal attacks. Furthermore, MEGSiO₂with 24-hour polymerization had a better impact on durability compared to both the control and MEGSiO₂ with 12-hour polymerization. The 24-hour polymerization using 1% SiO₂nanoparticles resulted in the lowest weight loss for Jabon (5.86% ) and Sengon (5.21%). In addition, the variation of SiO₂ nanoparticle concentration did not significantly affect the weight loss and durability of Jabon and Sengon against fungal decay.

Physicochemical Analysis, Antioxidant Activity, and Sensory of Sungkai (Peronema canescens Jack.) Leaf Extract

Devi Silsia, Syafnil, Laili Susanti, Marniza, Tomi Tri Rachmadi — Thu, 17 Oct 2024 16:16:12 +0700

Sungkai leaves were widely used as an immunomodulatory agent during the COVID-19 pandemic. This research aimed to determine the color, phytochemical characteristics, vitamin C content, polyphenol content, antioxidant activity, and sensory of sungkai leaves extracts from various types of leaves (shoot, young, and old) as well as the condition (fresh and dry). The extraction process included boiling the sample with water at a temperature of 90⁰C for 10 minutes. The parameters observed in this study were color, phytochemicals screening, vitamin C, polyphenols, antioxidant activity, and sensory. The results showed that the extract color was influenced by the types of leaves. These included red-purple for the shot leaves and yellow for young and old leaves. The extract contained flavonoids, tannins, and saponins. The fresh leaves extract produced a higher total vitamin C, polyphenols, and antioxidant activity compared to the dry counterparts. Furthermore, the highest chemical content of sungkai leaves extract was discovered in fresh shoot leaves with total vitamin C, polyphenols, and IC₅₀ values of 172.77 μg/ml, 280.77 μg/ml, and 28.33 μg/ml (strong antioxidant activity), respectively. Sensory characteristics of color, aroma, taste, and overall taste in each extract differed in liking score. Overall, panelists preferred the extract from dried older leaves.

The Impact of the Poso Energy Hydropower Plant on Lake Poso Aquatic Ecosystem in Central Sulawesi

Ari Wirachandra, Erny Poedjirahajoe, Ris Hadi Purwanto — Fri, 25 Oct 2024 16:18:39 +0700

The Poso Energy Hydropower Plant (PLTA) operation and various industrial, agricultural, and domestic waste disposal activities could impact the Lake Poso aquatic ecosystem. However, no documented reports have been detailing the impact of the PLTA. Therefore, this research aimed to analyze the characteristics of the Lake Poso aquatic ecosystem, focusing on physical (TSS, odor, color, turbidity), chemical (pH, DO, BOD, COD, NO₃-N, total phosphate), and biological (fecal coliform, plankton diversity) parameters. Water samples were collected at six points in the area before, surrounding, and after the PLTA from July to September 2022. Analyzing the sample data using the analysis of variance (ANOVA) revealed significant differences in physical, chemical, and biological parameters among the six sample points. Additionally, the results showed that the PLTA impacted the characteristics of the Lake Poso aquatic ecosystem, particularly affecting parameters such as TSS, DO, COD, NO₃-N, color, and total phosphate. An environmentally sound waste management strategy is urgently needed to support Lake Poso's aquatic ecosystem conservation.

Phytochemical Content of Tingi (Ceriops tagal) Bark Extract by Ultrasonication Process

Guring Briegel Mandegani, Rini Pujiarti, Ganis Lukmandaru — Fri, 25 Oct 2024 16:19:18 +0700

Tingi (Ceriops tagal) becomes one of the natural dyes used in textile dyeing. Ultrasonication is an extraction method that requires less time than conventional methods. Therefore, this study aimed to determine the effect of the ultrasonication duration (20, 40, 60, 80, and 100 minutes) on the total phenolic content (TPC), total flavonoid content (TFC), and total tannin content (TTC). The extraction yield was calculated by drying the solution with a freezer dryer, and phytochemical content was determined using UV-vis spectrophotometry. The results indicated that the yield value of the duration treatment was in the range of 3.74% to 5.53%, which was lower than the conventional method (10.58%). However, TPC, TFC, and TTC had more optimal values than the conventional method, with TPC values ranging from 268.1 to 314.1 mgGAE/g sample, TFC ranging from 68.3 to 87.1 mgQE/g sample, and TTC ranging from 244.8 to 338.1 mgTAE/g sample. The highest compound content was observed at 20 minutes, indicating that the ultrasonication method can be applied to extract Tingi bark as natural dyes.

Blue Carbon Potential of Mangrove Ecosystems and Its Management to Promote Climate Change Mitigation in Indonesia

Wed, 30 Oct 2024 14:22:40 +0700

This research aimed to analyze blue carbon potential and mangrove ecosystem management in promoting climate change mitigation in Indonesia. The collected data included mangrove area data obtained through the Indonesian National Ecosystem Monitoring System (SIMONTANA). This research calculated the carbon stock using the global average of mangrove carbon stock. The results showed that the total blue carbon stored in mangrove ecosystems reached 3,267.87 Megaton Carbon (MtC). Papua and Kalimantan regions contributed the most significant potential, with 1,707.22 MtC and 608.17 MtC, respectively. The absorption of carbon dioxide (CO₂) reached 11,982.21 MtCO₂e. The most significant CO₂ gas emissions absorption was observed in the Papua region, amounting to 6,259.80 MtCO₂e, followed by Sumatra with 2,118.59 MtCO₂e. This high potential value correlated with mangrove ecosystem management policies, such as conservation, restoration, and blue carbon monetization. Mangrove management for climate change mitigation was carried out through national and international cooperation to achieve the 26% to 40% emission reduction target. The existing management model of mangrove ecosystems focused on improving ecological sustainability with less orientation on improving community welfare. Implementing blue carbon monetization at the district level by involving the community as the owners or managers of the mangrove ecosystems is crucial.

The True Mangroves of Bintuni Bay, Indonesia with Special Notes on the Existence of Amyema mackayensis (Blakely) Danser and Brownlowia argentata Kurz

Thu, 17 Oct 2024 15:43:19 +0700

This research aimed to identify true mangroves in the ecotone area of Bintuni Bay, West Papua, Indonesia. It applied a plotless transect sampling method to identify two true mangroves previously unknown to the area, namely Amyema mackayensis and Brownlowia Argentata. The presence of the species in Bintuni Bay extended its distribution to the northern area of Indonesian New Guinea. With the addition of these two new records, Bintuni Bay hosted 30 species of true mangroves.

Back Matters

Diana Mahayani — Mon, 11 Nov 2024 14:54:44 +0700