A. Yunianto, Avry Pribadi, Hery Kurniawan, Ahmad Junaedi, Siti Wahyuningsih, Michael Daru Enggar Wiratmoko
Beekeeping practice was an alternative livelihood for communities around forest areas, offering a potential solution to reduce conflicts arising from the use and management of this ecosystem. Starting in the COVID-19 pandemic, the government introduced Apis mellifera from Java island into honey production in Sumatra due to its high productivity and adaptability to new environments. Therefore, this research aimed to explore the challenges and develop business models and value chains associated with commercializing Apis mellifera honey. The analysis used a qualitative descriptive method through observation and in-depth interviews with beekeeping entrepreneurs. There were two sales systems. The first was direct from beekeepers, and the second was indirect sales systems facilitated by collectors/industries. The collectors/industries gained a significant profit, approximately IDR. 80,000.00/kg, while beekeepers only received a minimum selling price. Marketing became a significant issue as beekeepers tended to focus more on cultivation efforts, resulting in a simplistic method of honey sales. Consequently, providing maximum economic value to the communities around the forest areas required synergy and assistance from related sectors.
{"title":"Small and Medium Scales Business Development Model and Value Chain of Apis mellifera L. Bee Cultivation in Riau Province","authors":"A. Yunianto, Avry Pribadi, Hery Kurniawan, Ahmad Junaedi, Siti Wahyuningsih, Michael Daru Enggar Wiratmoko","doi":"10.22146/jik.v18i1.6560","DOIUrl":"https://doi.org/10.22146/jik.v18i1.6560","url":null,"abstract":"Beekeeping practice was an alternative livelihood for communities around forest areas, offering a potential solution to reduce conflicts arising from the use and management of this ecosystem. Starting in the COVID-19 pandemic, the government introduced Apis mellifera from Java island into honey production in Sumatra due to its high productivity and adaptability to new environments. Therefore, this research aimed to explore the challenges and develop business models and value chains associated with commercializing Apis mellifera honey. The analysis used a qualitative descriptive method through observation and in-depth interviews with beekeeping entrepreneurs. There were two sales systems. The first was direct from beekeepers, and the second was indirect sales systems facilitated by collectors/industries. The collectors/industries gained a significant profit, approximately IDR. 80,000.00/kg, while beekeepers only received a minimum selling price. Marketing became a significant issue as beekeepers tended to focus more on cultivation efforts, resulting in a simplistic method of honey sales. Consequently, providing maximum economic value to the communities around the forest areas required synergy and assistance from related sectors. ","PeriodicalId":31295,"journal":{"name":"Jurnal Ilmu Kehutanan","volume":" 545","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140382784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Witno Witno, Maria Maria, Liana Liana, Wardi Wardi
Forests are crucial in absorbing carbon dioxide (CO2) from the atmosphere through photosynthesis and storing the carbon in its biomass. This research aimed to assess the potential for CO2 absorption of forests around landslides along the Trans Palopo-Toraja highways. This research employed a destructive sampling to measure understorey and litter biomass. Furthermore, it measured the biomass of understorey plants and litter with a destructive method. The 12 measurement plots were purposively placed on the landslide points to represent various vegetation conditions. The results revealed the presence of 77 plant species, totaling 554 individuals on the measurement plots. Plot 4 and Plot 1 showed the highest and lowest carbon absorption potential at 790.39 tons/ha and 199.63 tons/ha, respectively. The estimated average absorption of 12 plots was 461.75 tons/ha. Tree-level vegetation had the highest carbon absorption value due to its bigger diameter and CO2 absorption capacity than saplings and poles.
{"title":"Assessing Carbon Dioxide (CO2) Absorption Potential of Forests Around Landslides Along the Trans Palopo-Toraja Highways","authors":"Witno Witno, Maria Maria, Liana Liana, Wardi Wardi","doi":"10.22146/jik.v18i1.9782","DOIUrl":"https://doi.org/10.22146/jik.v18i1.9782","url":null,"abstract":"Forests are crucial in absorbing carbon dioxide (CO2) from the atmosphere through photosynthesis and storing the carbon in its biomass. This research aimed to assess the potential for CO2 absorption of forests around landslides along the Trans Palopo-Toraja highways. This research employed a destructive sampling to measure understorey and litter biomass. Furthermore, it measured the biomass of understorey plants and litter with a destructive method. The 12 measurement plots were purposively placed on the landslide points to represent various vegetation conditions. The results revealed the presence of 77 plant species, totaling 554 individuals on the measurement plots. Plot 4 and Plot 1 showed the highest and lowest carbon absorption potential at 790.39 tons/ha and 199.63 tons/ha, respectively. The estimated average absorption of 12 plots was 461.75 tons/ha. Tree-level vegetation had the highest carbon absorption value due to its bigger diameter and CO2 absorption capacity than saplings and poles.","PeriodicalId":31295,"journal":{"name":"Jurnal Ilmu Kehutanan","volume":" 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140383897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ali Suhardiman, Frans Milan, Y. Ruslim, Ariyanto Ariyanto, Hari Siswanto
The incidence of fallen trees along the roadside was widespread across various locations in Indonesia, particularly in areas where trees naturally thrive. Therefore, this research aimed to explore Google Street View (GSV) to obtain information regarding the potential of fallen trees. A novel approach was proposed using panoramic photos available in GSV data from May 2021 and then subjected to testing along Balikpapan–Samarinda Arterial Road, covering a distance of 33 kilometers (Km), which traversed Bukit Soeharto Grand Forest Park (BSGFP). Leaning trees, trees with imbalanced canopy proportion, dying trees, and trees in rough topography became the criteria specified from GSV photos to determine potentially fallen trees. The results showed that 224 trees along Arterial Road met those criteria, translating to approximately 6.79 trees per kilometer of Arterial Road. The analysis revealed that an imbalance canopy proportion was the primary cause of fallen trees, supported by investigations and comparisons with the corresponding GSV photos before the collapse. The Arterial Road Balikpapan-Samarinda poses moderate fallen tree vulnerability, scoring between 25% and 50%.
{"title":"Vulnerability Assessment of Fallen Trees Along Arterial Road of Bukit Soeharto Grand Forest Park Using Google Street View","authors":"Ali Suhardiman, Frans Milan, Y. Ruslim, Ariyanto Ariyanto, Hari Siswanto","doi":"10.22146/jik.v18i1.9158","DOIUrl":"https://doi.org/10.22146/jik.v18i1.9158","url":null,"abstract":"The incidence of fallen trees along the roadside was widespread across various locations in Indonesia, particularly in areas where trees naturally thrive. Therefore, this research aimed to explore Google Street View (GSV) to obtain information regarding the potential of fallen trees. A novel approach was proposed using panoramic photos available in GSV data from May 2021 and then subjected to testing along Balikpapan–Samarinda Arterial Road, covering a distance of 33 kilometers (Km), which traversed Bukit Soeharto Grand Forest Park (BSGFP). Leaning trees, trees with imbalanced canopy proportion, dying trees, and trees in rough topography became the criteria specified from GSV photos to determine potentially fallen trees. The results showed that 224 trees along Arterial Road met those criteria, translating to approximately 6.79 trees per kilometer of Arterial Road. The analysis revealed that an imbalance canopy proportion was the primary cause of fallen trees, supported by investigations and comparisons with the corresponding GSV photos before the collapse. The Arterial Road Balikpapan-Samarinda poses moderate fallen tree vulnerability, scoring between 25% and 50%. ","PeriodicalId":31295,"journal":{"name":"Jurnal Ilmu Kehutanan","volume":" 57","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140384749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-25DOI: 10.22146/jik.v18i1.12543
S. Sunarta, Kaharuddin Kaharuddin, Dwiko Budi Permadi, Widiyatno Widiyatno, R. Widyorini, G. K. Dewi, Ari Susanti, N. P. D. Mahayani
Given a mandate to preserve the Indonesia tropical forest through its education, research, and community service activities, the Faculty of Forestry Universitas Gadjah Mada (FoF UGM) has reached broad stakeholders to support sustainable forest management and climate mitigation (SDG 13 and 17). FoF UGM supports basic and applied research contributing to forestry industrialization (SDG 9), such as improved planting materials for Tectona grandis and Eucalyptus sp. In collaboration with the community (SDG 1 and 2), FoF UGM also diversifies kajuput essential oil produced in Wanagama and UGM teaching forests. Technology innovations such as glue and cross-laminated timber, biodiesel, information systems, and drone technologies for land rehabilitation and carbon accounting represent the institution's commitment to improving Indonesia's forest, forestry, community, and national economy (SDG 13 and 15).
{"title":"Sixty Years of UGM Forestry Faculty’s Work in Preserving Indonesia’s Forests and Environment","authors":"S. Sunarta, Kaharuddin Kaharuddin, Dwiko Budi Permadi, Widiyatno Widiyatno, R. Widyorini, G. K. Dewi, Ari Susanti, N. P. D. Mahayani","doi":"10.22146/jik.v18i1.12543","DOIUrl":"https://doi.org/10.22146/jik.v18i1.12543","url":null,"abstract":"Given a mandate to preserve the Indonesia tropical forest through its education, research, and community service activities, the Faculty of Forestry Universitas Gadjah Mada (FoF UGM) has reached broad stakeholders to support sustainable forest management and climate mitigation (SDG 13 and 17). FoF UGM supports basic and applied research contributing to forestry industrialization (SDG 9), such as improved planting materials for Tectona grandis and Eucalyptus sp. In collaboration with the community (SDG 1 and 2), FoF UGM also diversifies kajuput essential oil produced in Wanagama and UGM teaching forests. Technology innovations such as glue and cross-laminated timber, biodiesel, information systems, and drone technologies for land rehabilitation and carbon accounting represent the institution's commitment to improving Indonesia's forest, forestry, community, and national economy (SDG 13 and 15). ","PeriodicalId":31295,"journal":{"name":"Jurnal Ilmu Kehutanan","volume":" 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140383677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This research aimed to analyze the effects of commercial logging on the indigenous communities of the Mentawai Islands. Over the past five decades, inhabitants, particularly those residing on Siberut Island, were entangled in a conflict of interest concerning small and large-scale commercial logging activities. The results showed that despite the implementation of regional autonomy in the early 2000s, delegating decision-making authority over natural resource use, local communities and government actively promoted sustainable practices. In the context of the Mentawai Islands, the anticipated outcomes still needed to materialize.
{"title":"The Impacts of Commercial Logging on Social-Economy of Communities in Mentawai Islands","authors":"J. Tulius, Myrna Eindhoven","doi":"10.22146/jik.v18i1.9125","DOIUrl":"https://doi.org/10.22146/jik.v18i1.9125","url":null,"abstract":"This research aimed to analyze the effects of commercial logging on the indigenous communities of the Mentawai Islands. Over the past five decades, inhabitants, particularly those residing on Siberut Island, were entangled in a conflict of interest concerning small and large-scale commercial logging activities. The results showed that despite the implementation of regional autonomy in the early 2000s, delegating decision-making authority over natural resource use, local communities and government actively promoted sustainable practices. In the context of the Mentawai Islands, the anticipated outcomes still needed to materialize.","PeriodicalId":31295,"journal":{"name":"Jurnal Ilmu Kehutanan","volume":" 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140385188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-25DOI: 10.22146/jik.v18i1.10990
Aloysius Gonzaga Dimas Bintarta Raharja, Muhammad Baiquni, Setiadi Setiadi
Humans control their cultural environment, which is associated with biotic and abiotic environments, resulting in environmental sustainability. The indigenous community's existence in managing environmental resources must be examined more deeply from the perspective of human ecology. Therefore, this research aimed to examine and analyze the management of resources and environment, mainly the customary forest in the Tenganan Pegringsingan indigenous community. This research employed a participatory observation and spatial ethnography paradigm to understand the pattern of the Tenganan Pegringsingan customary forest management based on customary law (awig-awig), legal delegation (The Customary Forest Decree), and the access of stakeholders to the customary forest. The customary forest governance involved krama desa, the land inheritance rights owners of the Tenganan Pegringsingan indigenous community, and Penyakap, immigrants/krama sesambahan tillers in the customary forest. These three stakeholders had different spatial access to the customary forest as a place and a space.
{"title":"Forest As a Living Space: Rulership and Management in the Tenganan Pegringsingan Customary Forest, Karangasem Regency, Bali","authors":"Aloysius Gonzaga Dimas Bintarta Raharja, Muhammad Baiquni, Setiadi Setiadi","doi":"10.22146/jik.v18i1.10990","DOIUrl":"https://doi.org/10.22146/jik.v18i1.10990","url":null,"abstract":"Humans control their cultural environment, which is associated with biotic and abiotic environments, resulting in environmental sustainability. The indigenous community's existence in managing environmental resources must be examined more deeply from the perspective of human ecology. Therefore, this research aimed to examine and analyze the management of resources and environment, mainly the customary forest in the Tenganan Pegringsingan indigenous community. This research employed a participatory observation and spatial ethnography paradigm to understand the pattern of the Tenganan Pegringsingan customary forest management based on customary law (awig-awig), legal delegation (The Customary Forest Decree), and the access of stakeholders to the customary forest. The customary forest governance involved krama desa, the land inheritance rights owners of the Tenganan Pegringsingan indigenous community, and Penyakap, immigrants/krama sesambahan tillers in the customary forest. These three stakeholders had different spatial access to the customary forest as a place and a space.","PeriodicalId":31295,"journal":{"name":"Jurnal Ilmu Kehutanan","volume":" 37","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140385235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lichens are thallophytes, capable of absorbing water, nutrients, and chemical compounds in the air, which led to their application as bio-indicators of air quality. Therefore, this research aimed to determine the abundance and diversity of lichens in the Maribu Village, West Sentani District, Jayapura Regency. This research used the exploration method by tracing the observation paths for vegetation and the presence of lichens. This research established three observation stations with three observation plots of 5 m × 5 m in each station. The obtained samples were identified in the Biology Laboratory of FMIPA Cenderawasih University. This research identified 14 tree species belonging to 12 families and 22 species of lichens belonging to 10 families in the observation plots. Phlyctis argena (39 colonies) and Cryptothecia striata (32 colonies) had the highest colony and fell in the 'very common' category, with the diversity index value (H') of 2.79, which was in the medium category status. The results became the first recorded data in the lowland areas of Papua and could become a baseline for further research.
{"title":"Using the Diversity of Lichens in Maribu Forest Area, West Sentani District, Jayapura Regency as a Baseline Data on Environmental Changes","authors":"S. Suharno, Hasifa Hasifa, Supeni Sufaati","doi":"10.22146/jik.v18i1.7850","DOIUrl":"https://doi.org/10.22146/jik.v18i1.7850","url":null,"abstract":"Lichens are thallophytes, capable of absorbing water, nutrients, and chemical compounds in the air, which led to their application as bio-indicators of air quality. Therefore, this research aimed to determine the abundance and diversity of lichens in the Maribu Village, West Sentani District, Jayapura Regency. This research used the exploration method by tracing the observation paths for vegetation and the presence of lichens. This research established three observation stations with three observation plots of 5 m × 5 m in each station. The obtained samples were identified in the Biology Laboratory of FMIPA Cenderawasih University. This research identified 14 tree species belonging to 12 families and 22 species of lichens belonging to 10 families in the observation plots. Phlyctis argena (39 colonies) and Cryptothecia striata (32 colonies) had the highest colony and fell in the 'very common' category, with the diversity index value (H') of 2.79, which was in the medium category status. The results became the first recorded data in the lowland areas of Papua and could become a baseline for further research.","PeriodicalId":31295,"journal":{"name":"Jurnal Ilmu Kehutanan","volume":"8 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140381375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The mangrove ecosystem contributes to climate change mitigation by absorbing carbon dioxide gas. The shoreline of Negeri Waai, Central Maluku Regency (CMR), becomes one of Indonesia's promising mangrove ecosystem habitats for carbon absorption. Therefore, this research aimed to assess the blue carbon potential of mangroves on the coast of Negeri Waai, CMR. This research collected data using the quadrant transect method (10 x 10 m) and placed randomly in 65 quadrants. The analysis of blue carbon potential used an allometric approach to above and below-ground biomass (AGB and BGB). The results showed that the total blue carbon mangrove stock on the coast of Negeri Waai was 73.22 ton C/ha, consisting of 49.44 tons C/ha above-ground carbon (AGC) and 23.78 tons C/ha below-ground carbon (BGC). Sonneratia alba contributed the most extensive carbon stock, namely 70.69 ton C/ha, consisting of 47.53 tons C/ha AGC and 23.16 tons C/ha BGC. This result was relatively low compared to the global average of blue carbon in mangroves, 134 ton C/ha. Based on this result, efforts were needed to restore the mangrove ecosystem, increase the potential for carbon absorption, and mitigate climate change.
{"title":"Blue Carbon Potential of Mangrove Ecosystem on the Coast of Negeri Waai, Central Maluku Regency","authors":"Rahman Rahman, J. W. Tuahatu, Christin Tuhehay","doi":"10.22146/jik.v18i1.8814","DOIUrl":"https://doi.org/10.22146/jik.v18i1.8814","url":null,"abstract":"The mangrove ecosystem contributes to climate change mitigation by absorbing carbon dioxide gas. The shoreline of Negeri Waai, Central Maluku Regency (CMR), becomes one of Indonesia's promising mangrove ecosystem habitats for carbon absorption. Therefore, this research aimed to assess the blue carbon potential of mangroves on the coast of Negeri Waai, CMR. This research collected data using the quadrant transect method (10 x 10 m) and placed randomly in 65 quadrants. The analysis of blue carbon potential used an allometric approach to above and below-ground biomass (AGB and BGB). The results showed that the total blue carbon mangrove stock on the coast of Negeri Waai was 73.22 ton C/ha, consisting of 49.44 tons C/ha above-ground carbon (AGC) and 23.78 tons C/ha below-ground carbon (BGC). Sonneratia alba contributed the most extensive carbon stock, namely 70.69 ton C/ha, consisting of 47.53 tons C/ha AGC and 23.16 tons C/ha BGC. This result was relatively low compared to the global average of blue carbon in mangroves, 134 ton C/ha. Based on this result, efforts were needed to restore the mangrove ecosystem, increase the potential for carbon absorption, and mitigate climate change.","PeriodicalId":31295,"journal":{"name":"Jurnal Ilmu Kehutanan","volume":" 973","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140382488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Community forests offer diverse wood species and quantities, potentially meeting the increasing demand for wood-building materials driven by the green building concept. The diverse species have varied specific gravity. Combining wood species and cross-lamination engineering could improve the strength and dimensional stability of low-density and medium-density wood from community forests. Therefore, this research aimed to determine the effect of wood species and laminae composition on the properties of 5-ply cross-laminated beams (CLB). The 5-ply CLB was made in 5 cm x 5 cm x 112 cm with 1 cm laminae thickness. The species used were sengon, jabon, and mahogany, with acacia as enforcement. This research also compared homogeneous and heterogeneous laminae composition. The results showed that wood species and laminae composition significantly affect the mechanical properties. Heterogeneous compositions had higher mechanical properties than homogeneous compositions. The delamination test revealed that the CLB had high water resistance on cold and hot immersion even though the beams used up to three wood species.
社区森林提供多种木材品种和数量，有可能满足绿色建筑概念对木质建筑材料日益增长的需求。不同的树种具有不同的比重。结合木材种类和交叉层压工程可提高社区森林中低密度和中密度木材的强度和尺寸稳定性。因此，本研究旨在确定木种和层板组成对 5 层交叉层压梁（CLB）性能的影响。5 层交叉层压梁的尺寸为 5 厘米 x 5 厘米 x 112 厘米，层板厚度为 1 厘米。使用的树种是森古木、雅本木和桃花心木，并以金合欢作为执行材料。这项研究还比较了同质板层和异质板层的组成。结果表明，木材种类和板层成分对机械性能有很大影响。异质成分比均质成分具有更高的机械性能。分层测试表明，即使横梁使用了多达三种木种，CLB 在冷热浸泡时仍具有很高的耐水性。
{"title":"The Effect of Wood Species and Laminae Composition on the Properties of Cross-Laminated Beam Made from Community Forest Wood","authors":"G. K. Dewi, T. A. Prayitno, R. Widyorini","doi":"10.22146/jik.v18i1.6042","DOIUrl":"https://doi.org/10.22146/jik.v18i1.6042","url":null,"abstract":"Community forests offer diverse wood species and quantities, potentially meeting the increasing demand for wood-building materials driven by the green building concept. The diverse species have varied specific gravity. Combining wood species and cross-lamination engineering could improve the strength and dimensional stability of low-density and medium-density wood from community forests. Therefore, this research aimed to determine the effect of wood species and laminae composition on the properties of 5-ply cross-laminated beams (CLB). The 5-ply CLB was made in 5 cm x 5 cm x 112 cm with 1 cm laminae thickness. The species used were sengon, jabon, and mahogany, with acacia as enforcement. This research also compared homogeneous and heterogeneous laminae composition. The results showed that wood species and laminae composition significantly affect the mechanical properties. Heterogeneous compositions had higher mechanical properties than homogeneous compositions. The delamination test revealed that the CLB had high water resistance on cold and hot immersion even though the beams used up to three wood species.","PeriodicalId":31295,"journal":{"name":"Jurnal Ilmu Kehutanan","volume":" 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140383914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tarsiers (Tarsius supriatnai) were part of the endemic primates in Sulawesi categorized as vulnerable in the IUCN red list. Therefore, this research aimed to describe and analyze the characteristics, preferences, and determinant factors influencing the use of nest trees by tarsiers in Nantu Wildlife Reserve, Gorontalo. This research used a direct observation method to collect data for three months, from September to November 2013, focusing on temperature, humidity, light intensity, tree height, tree diameter, nest height from the ground, and frequency of nest use. Moreovr, the Neu index was applied to determine nest preferences and multiple linear regression analysis was used to analyze the factors influencing nest tree selection. The results showed that the primates preferred eight nest trees, including Ficus altissima (w=1.58) and Ficus benjamina (w=1.50). Multiple linear regression analysis showed that the humidity (4.103±3.674%, P>0.05) and light intensity (126.362±41.149 lx, P<0.05) became dominant factors influencing the frequency of nest use. The results generally showed that vegetation species and microclimate conditions were crucial for tarsiers, indicating the importance of preserving forest areas to ensure the conservation of these primates.
{"title":"Description and Preferences of Tarsier (Tarsius supriatnai) Nest Trees in Nantu Wildlife Reserve, Gorontalo","authors":"Terri Repi","doi":"10.22146/jik.v18i1.5393","DOIUrl":"https://doi.org/10.22146/jik.v18i1.5393","url":null,"abstract":"Tarsiers (Tarsius supriatnai) were part of the endemic primates in Sulawesi categorized as vulnerable in the IUCN red list. Therefore, this research aimed to describe and analyze the characteristics, preferences, and determinant factors influencing the use of nest trees by tarsiers in Nantu Wildlife Reserve, Gorontalo. This research used a direct observation method to collect data for three months, from September to November 2013, focusing on temperature, humidity, light intensity, tree height, tree diameter, nest height from the ground, and frequency of nest use. Moreovr, the Neu index was applied to determine nest preferences and multiple linear regression analysis was used to analyze the factors influencing nest tree selection. The results showed that the primates preferred eight nest trees, including Ficus altissima (w=1.58) and Ficus benjamina (w=1.50). Multiple linear regression analysis showed that the humidity (4.103±3.674%, P>0.05) and light intensity (126.362±41.149 lx, P<0.05) became dominant factors influencing the frequency of nest use. The results generally showed that vegetation species and microclimate conditions were crucial for tarsiers, indicating the importance of preserving forest areas to ensure the conservation of these primates.","PeriodicalId":31295,"journal":{"name":"Jurnal Ilmu Kehutanan","volume":" 37","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140384366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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