Vegetation is one of the factors that influence the protection function of the riparian zone. Riparian vegetation in teak production forests is dominated by teak plantation with low species diversity. Rehabilitation is needed to increase the role of vegetation in protecting riparian zone. Data and information of light intensity is required to support the success of rehabilitation. Light intensity is a significant factor for photosynthesis which impacts on the survival, growth and adaptation of a vegetation. The varying light intensity in the riparian zone due to diverse land cover becomes a challenge in rehabilitating this area. This study aims to identify light intensity in riparian zone of Modang River and Cemoro River in the teak production forest. Recognizing light characteristics will help in species selection to rehabilitate this area. Primary and secondary data were used in this study. Direct measurement of light intensity was carried out along riparian zone of the Modang and Cemoro Rivers by systematic sampling. A sampling plot measuring 20 x 20 meter was used as the location of the sampling point with a total of 36 plots. Climate data are obtained from field observations through the nearest climatology station. The results showed that different canopy cover causing light intensity of Modang and Cemoro rivers varies. Canopy cover in this area can be divided into canopy cover of teak forest of various ages (production plants), johar (previous rehabilitation plants), and logged-over areas. The selection of tolerant and intolerant trees is important to use as consideration for rehabilitation, in addition to other silvicultural and socio-economic considerations of the local community. Keywords: light, riparian, teak production forest
植被是影响河岸带保护功能的因素之一。柚木生产林的河岸植被以柚木种植为主，物种多样性较低。需要进行修复，以增加植被在保护河岸带方面的作用。需要光强度的数据和信息来支持康复的成功。光照强度是影响植被生存、生长和适应的光合作用的重要因素。由于不同的土地覆盖，河岸带的光照强度不同，这成为恢复该地区的一个挑战。本研究旨在确定柚木生产林中莫当河和切莫罗河河岸带的光照强度。识别光照特征将有助于物种选择以恢复该地区。本研究使用了主要和次要数据。通过系统采样，对莫当河和切莫罗河河岸带的光强进行了直接测量。使用一个20 x 20米的采样图作为采样点的位置，共有36个图。气候数据是通过最近的气候站从实地观测中获得的。结果表明，莫当河和切莫罗河不同的冠层覆盖引起的光强不同。该地区的树冠覆盖可分为不同年龄的柚木林（生产植物）、乔哈尔（以前的恢复植物）和砍伐区。除了当地社区的其他造林和社会经济考虑因素外，选择耐受和不耐受的树木也很重要，可以作为恢复的考虑因素。关键词：光照、河岸、柚木生产林
{"title":"Study of Light Intensity in Riparian Zone of Teak Production Forest in KHDTK Cemoro Modang","authors":"A. Nugroho, H. Riyanto","doi":"10.20886/jwas.v7i1.5430","DOIUrl":"https://doi.org/10.20886/jwas.v7i1.5430","url":null,"abstract":"Vegetation is one of the factors that influence the protection function of the riparian zone. Riparian vegetation in teak production forests is dominated by teak plantation with low species diversity. Rehabilitation is needed to increase the role of vegetation in protecting riparian zone. Data and information of light intensity is required to support the success of rehabilitation. Light intensity is a significant factor for photosynthesis which impacts on the survival, growth and adaptation of a vegetation. The varying light intensity in the riparian zone due to diverse land cover becomes a challenge in rehabilitating this area. This study aims to identify light intensity in riparian zone of Modang River and Cemoro River in the teak production forest. Recognizing light characteristics will help in species selection to rehabilitate this area. Primary and secondary data were used in this study. Direct measurement of light intensity was carried out along riparian zone of the Modang and Cemoro Rivers by systematic sampling. A sampling plot measuring 20 x 20 meter was used as the location of the sampling point with a total of 36 plots. Climate data are obtained from field observations through the nearest climatology station. The results showed that different canopy cover causing light intensity of Modang and Cemoro rivers varies. Canopy cover in this area can be divided into canopy cover of teak forest of various ages (production plants), johar (previous rehabilitation plants), and logged-over areas. The selection of tolerant and intolerant trees is important to use as consideration for rehabilitation, in addition to other silvicultural and socio-economic considerations of the local community. Keywords: light, riparian, teak production forest","PeriodicalId":31303,"journal":{"name":"Jurnal Wasian","volume":"7 1","pages":"15-24"},"PeriodicalIF":0.0,"publicationDate":"2020-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42470740","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}
One form of disaster mitigation is to know the vulnerability of areas that are at risk of disaster socially and economically. Studies on vulnerability to flash floods are necessary, as it might prevent material losses and fatalities. Wasior District at Teluk Wondama Regency experienced a flash flood in 2010 causing negative impacts such as fatalities and large material losses. To anticipate flash floods that might occur in the future, studies to evaluate the vulnerability to the flash flood are needed. This study aimed to: 1) analyze the level of vulnerability to flash floods in Wasior based on socioeconomic factors post the 2010 flash floods, 2) analyze the level of vulnerability to flash floods in Wasior based on institutional factors. The method used in this study was a combination of qualitative and quantitative methods. Data collection was conducted by observation, interview, and documentation. Data were analyzed by: 1) identifying the socioeconomic indicators of the community and institutions around the watershed, 2) providing weighting scores to the social economic criteria and institutional criteria from the most vulnerable to the least vulnerable, 3) assessing the level of community and institution vulnerabilities in the study site to the impact of flash floods based on the calculation of the weighting scores of socio-economic and institutional indicators. The results showed that the level of socioeconomic vulnerability to flash floods were categorized as moderate (total score 2.084), while the level of institutional vulnerability was low (total score 2.251). The results of this study can be used as a basis for considerations in the implementation of flash flood mitigation in Wasior. Keywords: vulnerabilities, social, economic, institutional, flash flood
{"title":"Analysis of Vulnerability Levels to the Flash Flood Based on Social Economic and Institutional Factors in Wasior, Teluk Wondama, West Papua","authors":"B. W. Hastanti, F. J. Hutapea","doi":"10.20886/jwas.v7i1.4785","DOIUrl":"https://doi.org/10.20886/jwas.v7i1.4785","url":null,"abstract":"One form of disaster mitigation is to know the vulnerability of areas that are at risk of disaster socially and economically. Studies on vulnerability to flash floods are necessary, as it might prevent material losses and fatalities. Wasior District at Teluk Wondama Regency experienced a flash flood in 2010 causing negative impacts such as fatalities and large material losses. To anticipate flash floods that might occur in the future, studies to evaluate the vulnerability to the flash flood are needed. This study aimed to: 1) analyze the level of vulnerability to flash floods in Wasior based on socioeconomic factors post the 2010 flash floods, 2) analyze the level of vulnerability to flash floods in Wasior based on institutional factors. The method used in this study was a combination of qualitative and quantitative methods. Data collection was conducted by observation, interview, and documentation. Data were analyzed by: 1) identifying the socioeconomic indicators of the community and institutions around the watershed, 2) providing weighting scores to the social economic criteria and institutional criteria from the most vulnerable to the least vulnerable, 3) assessing the level of community and institution vulnerabilities in the study site to the impact of flash floods based on the calculation of the weighting scores of socio-economic and institutional indicators. The results showed that the level of socioeconomic vulnerability to flash floods were categorized as moderate (total score 2.084), while the level of institutional vulnerability was low (total score 2.251). The results of this study can be used as a basis for considerations in the implementation of flash flood mitigation in Wasior. Keywords: vulnerabilities, social, economic, institutional, flash flood","PeriodicalId":31303,"journal":{"name":"Jurnal Wasian","volume":"7 1","pages":"25-38"},"PeriodicalIF":0.0,"publicationDate":"2020-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43599342","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 availability of topsoil which is relatively fertile to use as seedling media is more and more limited so that the low nutrient degraded soil become alternative media for tree seedling nursery. The purpose of the research was to get the combination of degraded soil media mixture for nyawai ( Ficus variegata ) seedling media in nursery. The degraded soil collected in the heavy ero d ed soil in Rumpin Villages, Rumpin Sub District, Bogor. Completed random design with factorial was used to test the media mixture treatments and NPK fertilizer dosages on the growth of nyawai seedling. A pair of leaves seedlings was transplanted on 5 media treatments, i.e. top soil, degraded soil, degraded soil 70 % + compost 30 % (v:v), degraded soil 90 % + rice husk charcoal 10 % (v:v), and degraded soil 60 % + compost 30 % + rice husk charcoal 10 % (v/v). The dosage of NPK fertilizer was used as much: 0 g, 0.5 g polybag, and 1.0 g/polybag. The result showed that interaction of media and NPK fertilizer dosages was only affected on seedling biomass parameter. The interaction treatment of t he mixture media of degraded soil 60 %, compost 30 % and rice husk charcoal 10 % could increase the growth of nyawai seedlings high by 30.60 % and fertilizer treatment of 1 g NPK could increase seedling biomass 6.21 g. The mixture media and fertilizing treatment by NPK 1 g can be alternative media on nyawai nursery. Keywords: Ficus variegata , soil media, seedlings, growth
{"title":"Improving of Degraded Soil Quality for Ficus variegata Nursery Media by Adding Organic Matters and NPK Fertilizer","authors":"Danu Danu, D. Sudrajat","doi":"10.20886/jwas.v6i2.4720","DOIUrl":"https://doi.org/10.20886/jwas.v6i2.4720","url":null,"abstract":"The availability of topsoil which is relatively fertile to use as seedling media is more and more limited so that the low nutrient degraded soil become alternative media for tree seedling nursery. The purpose of the research was to get the combination of degraded soil media mixture for nyawai ( Ficus variegata ) seedling media in nursery. The degraded soil collected in the heavy ero d ed soil in Rumpin Villages, Rumpin Sub District, Bogor. Completed random design with factorial was used to test the media mixture treatments and NPK fertilizer dosages on the growth of nyawai seedling. A pair of leaves seedlings was transplanted on 5 media treatments, i.e. top soil, degraded soil, degraded soil 70 % + compost 30 % (v:v), degraded soil 90 % + rice husk charcoal 10 % (v:v), and degraded soil 60 % + compost 30 % + rice husk charcoal 10 % (v/v). The dosage of NPK fertilizer was used as much: 0 g, 0.5 g polybag, and 1.0 g/polybag. The result showed that interaction of media and NPK fertilizer dosages was only affected on seedling biomass parameter. The interaction treatment of t he mixture media of degraded soil 60 %, compost 30 % and rice husk charcoal 10 % could increase the growth of nyawai seedlings high by 30.60 % and fertilizer treatment of 1 g NPK could increase seedling biomass 6.21 g. The mixture media and fertilizing treatment by NPK 1 g can be alternative media on nyawai nursery. Keywords: Ficus variegata , soil media, seedlings, growth","PeriodicalId":31303,"journal":{"name":"Jurnal Wasian","volume":"6 1","pages":"101-109"},"PeriodicalIF":0.0,"publicationDate":"2019-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43126536","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}
Climate change is difficult phenomenon to be understood by ordinary community. Whereas perception and knowledge of climate change will influence mitigation and adaptation, which can decrease risks of climate change impact. The research aims to find out community’s perception about climate change and adaptation efforts which have been done by communities of Sarawet Village at North Minahasa Regency. Perception and adaptation data were obtained through interview and focus group discussion. The result shows that 96.67 % of community has experienced the symptoms and impacts of climate change, which perceived as extreme season or the shift of rain and drought season. The most perceived climate change impacts are crop failure, less income from agriculture and drought. This perception indicates a lack of environmental and forestry information . The adaptation efforts that have been done by the community include change plant species that need lack water as well as fulfill needs of clean water from the central well and utilize springs from upstream. Based on SWOT analysis An appropriate strategy to encourage adaptation in Sarawet village is done through increasing the adaptive capacity of the community Keywords : perception, climate change, SWOT, adaptive capacity
{"title":"Perception and Adaptation of Coastal Community Toward Climate Change at Sarawet Village of North Minahasa Regency","authors":"I. Yuliantoro, N. Wahyuni","doi":"10.20886/jwas.v6i2.4728","DOIUrl":"https://doi.org/10.20886/jwas.v6i2.4728","url":null,"abstract":"Climate change is difficult phenomenon to be understood by ordinary community. Whereas perception and knowledge of climate change will influence mitigation and adaptation, which can decrease risks of climate change impact. The research aims to find out community’s perception about climate change and adaptation efforts which have been done by communities of Sarawet Village at North Minahasa Regency. Perception and adaptation data were obtained through interview and focus group discussion. The result shows that 96.67 % of community has experienced the symptoms and impacts of climate change, which perceived as extreme season or the shift of rain and drought season. The most perceived climate change impacts are crop failure, less income from agriculture and drought. This perception indicates a lack of environmental and forestry information . The adaptation efforts that have been done by the community include change plant species that need lack water as well as fulfill needs of clean water from the central well and utilize springs from upstream. Based on SWOT analysis An appropriate strategy to encourage adaptation in Sarawet village is done through increasing the adaptive capacity of the community Keywords : perception, climate change, SWOT, adaptive capacity","PeriodicalId":31303,"journal":{"name":"Jurnal Wasian","volume":"6 1","pages":"89-99"},"PeriodicalIF":0.0,"publicationDate":"2019-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41477110","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}
S. Hakim, T. Yuwati, Dony Rachmandi, P. B. Santosa, A. Ardhana, D. Alimah
The use of bio-fertilizer is increasing along with the awareness of eco-friendly life style. The use of bio-fertilizer give several advantages such as enhancing plant growth, provide plant nutritions, easily absorbed by plant and environmental friendly. Endophytic fungi can be used as biological fertilizers.In this study, endophytic fungi Penicillium citrinum isolate P3.10 were used as a main ingredient for biological fertilizers. This study aims to investigate: (a) the most effective carrier material for biological fertilizers made from endophytic fungi P. citrinum and (b) maximum shelf-life of biofertilizers. Three carrier materials were tested to find out the best carrier as biological fertilizer carriers. Factorial Completely Randomized Design with two factors used in this study with the first factor is the type of carrier material (rice bran, saw dust, and peat soil), and the second factor is storage time (14, 28, 42, 56, dan 70 days).The result of the study and consideration based on the standards of biological fertilizer regulation of the Minister of Agriculture Number 70 / Permentan / SR.140 / 19/2011) showed that of the three tested carriers (rice bran, sawdust, and peat), peat showed the best performance as biofertilizer carrier with the recommend maximum shelf-life is 28 days (5,62 x 10 5 cfu/gram) due to its C/N ratio value and its viability to maintain the number of viable fungi. Keywords: formulation, biofertilizer, endophytic fungi, peat soil, shelf-life
随着人们对环保生活方式的认识，生物肥料的使用也在增加。生物肥料的使用具有促进植物生长、提供植物营养、易于被植物吸收和环境友好等优点。内生真菌可以用作生物肥料。本研究以内生真菌青霉菌分离株P3.10为主要生物肥料原料。本研究旨在研究：（a）由内生真菌P.citrinum制成的生物肥料的最有效载体材料；（b）生物肥料的最大保质期。对三种载体材料进行了试验，找出了生物肥料载体的最佳载体。本研究中使用了两个因素的因子完全随机设计，第一个因素是载体材料的类型（米糠、木屑和泥炭土），第二个因素是储存时间（14、28、42、56和70天）。基于农业部长第70/Permentan/SR.140/19/2011号生物肥料法规标准的研究和考虑结果表明，在三种测试载体（米糠、木屑和泥炭）中，泥炭作为生物肥料载体表现出最好的性能，由于其C/N比值和维持活菌数量的活力，推荐的最大保质期为28天（5,62 x 105cfu/g）。关键词：配方、生物肥料、内生真菌、泥炭土、保质期
{"title":"Viability of Penicillium Citrinum on Different Carrier Media as Organic Fertilizer","authors":"S. Hakim, T. Yuwati, Dony Rachmandi, P. B. Santosa, A. Ardhana, D. Alimah","doi":"10.20886/jwas.v6i2.5366","DOIUrl":"https://doi.org/10.20886/jwas.v6i2.5366","url":null,"abstract":"The use of bio-fertilizer is increasing along with the awareness of eco-friendly life style. The use of bio-fertilizer give several advantages such as enhancing plant growth, provide plant nutritions, easily absorbed by plant and environmental friendly. Endophytic fungi can be used as biological fertilizers.In this study, endophytic fungi Penicillium citrinum isolate P3.10 were used as a main ingredient for biological fertilizers. This study aims to investigate: (a) the most effective carrier material for biological fertilizers made from endophytic fungi P. citrinum and (b) maximum shelf-life of biofertilizers. Three carrier materials were tested to find out the best carrier as biological fertilizer carriers. Factorial Completely Randomized Design with two factors used in this study with the first factor is the type of carrier material (rice bran, saw dust, and peat soil), and the second factor is storage time (14, 28, 42, 56, dan 70 days).The result of the study and consideration based on the standards of biological fertilizer regulation of the Minister of Agriculture Number 70 / Permentan / SR.140 / 19/2011) showed that of the three tested carriers (rice bran, sawdust, and peat), peat showed the best performance as biofertilizer carrier with the recommend maximum shelf-life is 28 days (5,62 x 10 5 cfu/gram) due to its C/N ratio value and its viability to maintain the number of viable fungi. Keywords: formulation, biofertilizer, endophytic fungi, peat soil, shelf-life","PeriodicalId":31303,"journal":{"name":"Jurnal Wasian","volume":"6 1","pages":"69-76"},"PeriodicalIF":0.0,"publicationDate":"2019-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47952060","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 study was aimed to obtain the Pinogu local peoples’s perception of the forest for their lives and to identification of forest resources utilization. Pinogu is a Bogani Nani Wartabone National Park’s enclave. The research was conducted in 2017 at Pinogu Sub-district which included five villages there are Bangiyo, Pinogu Induk, Pinogu Permai, Tilongibila and Dataran Hijau. Data collected with survey method by interviewing 150 respondents from five villages. Data was analyzed using, Likert Scale, Kendall Tau Correlation test and descriptive qualitative. Overall, the results showed forest perception in Pinogu’s local peoples was in fairly good category with value 79.69 from 40 - 100 and influenced by position in village communities variable. The local peoples utilized the forest resources inculdes hard wood, rattan, medicinal plants, wild animals, forest fruits, forest mushrooms, honey. This forest resources obtained from the forests around Pinogu and inside area of Bogani Nani Wartabone National Park. Keywords: Bogani Nani Wartabone, enclave, forest, Pinogu, perception
{"title":"Perception of Local Community of Pinogu Toward Forest and Its Utilization","authors":"D. Arini, I. Yuliantoro","doi":"10.20886/jwas.v6i2.5251","DOIUrl":"https://doi.org/10.20886/jwas.v6i2.5251","url":null,"abstract":"This study was aimed to obtain the Pinogu local peoples’s perception of the forest for their lives and to identification of forest resources utilization. Pinogu is a Bogani Nani Wartabone National Park’s enclave. The research was conducted in 2017 at Pinogu Sub-district which included five villages there are Bangiyo, Pinogu Induk, Pinogu Permai, Tilongibila and Dataran Hijau. Data collected with survey method by interviewing 150 respondents from five villages. Data was analyzed using, Likert Scale, Kendall Tau Correlation test and descriptive qualitative. Overall, the results showed forest perception in Pinogu’s local peoples was in fairly good category with value 79.69 from 40 - 100 and influenced by position in village communities variable. The local peoples utilized the forest resources inculdes hard wood, rattan, medicinal plants, wild animals, forest fruits, forest mushrooms, honey. This forest resources obtained from the forests around Pinogu and inside area of Bogani Nani Wartabone National Park. Keywords: Bogani Nani Wartabone, enclave, forest, Pinogu, perception","PeriodicalId":31303,"journal":{"name":"Jurnal Wasian","volume":"6 1","pages":"111-123"},"PeriodicalIF":0.0,"publicationDate":"2019-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42429924","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}
Diameter increment is an important information used to set silvicultural prescription that plays a crucial role in sustainable forest management. Therefor e , this research was aimed to analyze diameter increment of remnant stands in selectively logged forest in Papua. The dataset was acquired from permanent sample plots in logging concessions of PT Tunas Timber Lestari (TTL), PT Wapoga Mutiara Timber (WMT) dan PT Manokwari Mandiri Lestari (MML). The diameter measurements were conducted annually for 6 – 9 years on three 1 ha permanent plots. Diameter increment was calculated by measuring a gap between trees diameter in year t+1 and year t. The results showed that the average diameter increment of commercial species groups in those areas were 0.56 cm/ yr , 0.59 cm/ yr and 0.65 cm/ yr , respectively. These increments were smaller than the increment assumption of Indonesian Selective Logging (TPTI) i.e. 1 .00 cm/yr. T he diameter increment distribution based on diameter classes showed different patterns among sites. T he diameter increment distribution in PT MML and WMT increased with the increasing diameter, otherwise those in PT TTL tend to decrease with the increasing diameter class. Keywords: logged-over forest, species group, Papua, diameter increment
{"title":"Diameter Increment of Remnant Stands in Logged-Over Forest in Papua","authors":"Relawan Kuswandi, J. Nugroho","doi":"10.20886/jwas.v6i2.4620","DOIUrl":"https://doi.org/10.20886/jwas.v6i2.4620","url":null,"abstract":"Diameter increment is an important information used to set silvicultural prescription that plays a crucial role in sustainable forest management. Therefor e , this research was aimed to analyze diameter increment of remnant stands in selectively logged forest in Papua. The dataset was acquired from permanent sample plots in logging concessions of PT Tunas Timber Lestari (TTL), PT Wapoga Mutiara Timber (WMT) dan PT Manokwari Mandiri Lestari (MML). The diameter measurements were conducted annually for 6 – 9 years on three 1 ha permanent plots. Diameter increment was calculated by measuring a gap between trees diameter in year t+1 and year t. The results showed that the average diameter increment of commercial species groups in those areas were 0.56 cm/ yr , 0.59 cm/ yr and 0.65 cm/ yr , respectively. These increments were smaller than the increment assumption of Indonesian Selective Logging (TPTI) i.e. 1 .00 cm/yr. T he diameter increment distribution based on diameter classes showed different patterns among sites. T he diameter increment distribution in PT MML and WMT increased with the increasing diameter, otherwise those in PT TTL tend to decrease with the increasing diameter class. Keywords: logged-over forest, species group, Papua, diameter increment","PeriodicalId":31303,"journal":{"name":"Jurnal Wasian","volume":"6 1","pages":"125-133"},"PeriodicalIF":0.0,"publicationDate":"2019-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48031435","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 study aimed to determine habitat c haracteristics, food plants, population size , and distribution of J avan langur in Leuweung Sancang Nature Reserve. This study was conducted from February to April in Leuweung Sancang Nature Reserve. Composition and structure of vegetation were determined using vegetation analysis . P opulation and distribution of the javan langur were identified using concentration count method. A total of 110 plant species recorded in the javan langur’s habitat . Ketapang (Terminalia catappa ) was the dominant species in the study area composing 41,71% of the IVI. The Javan langur feed on at least 17 plant species. The plant parts eaten by the Javan langur included leaves, buds, shoots, flowers and fruits. A total of 19 javan langur groups were encountered along the beach forest of the nature reserve. Number of individual at each of the group varied ranging from 7 to 17 individual s. The population size was 227 individuals and t he population density was 0. 1 5 individuals per hectare . The javan langur’s age structure of adult : young : juvenile was 43 %: 27 %: 30 % indicating that the population was dominated by adult individuals and t he sex ratio of male:female was 1:3. Keywords: food plants, habitat, population, Trachypithecus auratus
{"title":"Habitat Characteristics and Population of Javan Langur (Trachypithecus Auratus E. Geoffroy Saint-Hilaire, 1812) In Leuweung Sancang Nature Reserve, Garut, West Java","authors":"A. Mustari, Achmad Fajar Pasaribu","doi":"10.20886/jwas.v6i2.4816","DOIUrl":"https://doi.org/10.20886/jwas.v6i2.4816","url":null,"abstract":"This study aimed to determine habitat c haracteristics, food plants, population size , and distribution of J avan langur in Leuweung Sancang Nature Reserve. This study was conducted from February to April in Leuweung Sancang Nature Reserve. Composition and structure of vegetation were determined using vegetation analysis . P opulation and distribution of the javan langur were identified using concentration count method. A total of 110 plant species recorded in the javan langur’s habitat . Ketapang (Terminalia catappa ) was the dominant species in the study area composing 41,71% of the IVI. The Javan langur feed on at least 17 plant species. The plant parts eaten by the Javan langur included leaves, buds, shoots, flowers and fruits. A total of 19 javan langur groups were encountered along the beach forest of the nature reserve. Number of individual at each of the group varied ranging from 7 to 17 individual s. The population size was 227 individuals and t he population density was 0. 1 5 individuals per hectare . The javan langur’s age structure of adult : young : juvenile was 43 %: 27 %: 30 % indicating that the population was dominated by adult individuals and t he sex ratio of male:female was 1:3. Keywords: food plants, habitat, population, Trachypithecus auratus","PeriodicalId":31303,"journal":{"name":"Jurnal Wasian","volume":"6 1","pages":"77-88"},"PeriodicalIF":0.0,"publicationDate":"2019-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49628608","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}
T. Sayektiningsih, A. Nugroho, I. Yassir, Ulfah Karmila Sari, Amir Ma’ruf, Mukhlisi Mukhlisi, Adi Surya, S. Suryanto
Understanding local community perceptions towards ecotourism is important since community has a crucial role in determining sustainable ecotourism. This research aimed to identify community perceptions towards impacts of ecotourism as well as to analyse the relationships between perception and ecotourism responsible behaviour. Other goal of this study was to analyse the relationship between ecotourism responsible behaviour and social factors. Data was collected in 4 villages adjacent to the Balikpapan bay, namely Maridan, Telemow, Binuang, and Mentawir. We used the quota technique to sample respondents. For each village, we took 40 respondents randomly. Data was then analysed using descriptive statistics, Spearman correlation, and Kruskal Wallis test. We found that community around the Balikpapan Bay thought that ecoto u rism was able to bring positive impacts for village and community. A Kruskal Wallis test revealed that there was no significant difference regarding perceptions among 4 villages. We found that there was a correlation between ecotourism responsible behaviour and gender. Implications of community’s perceptions to ecotourism development around the Balikpapan bay were then discussed. Keywords: ecotourism, perception, benefits, behaviour towards ecotourism, Balikpapan Bay
{"title":"Community Perceptions of Impacts of Ecotourism and Its Implications on Ecotourism Development in the Balikpapan Bay, East Kalimantan","authors":"T. Sayektiningsih, A. Nugroho, I. Yassir, Ulfah Karmila Sari, Amir Ma’ruf, Mukhlisi Mukhlisi, Adi Surya, S. Suryanto","doi":"10.20886/JWAS.V6I1.4666","DOIUrl":"https://doi.org/10.20886/JWAS.V6I1.4666","url":null,"abstract":"Understanding local community perceptions towards ecotourism is important since community has a crucial role in determining sustainable ecotourism. This research aimed to identify community perceptions towards impacts of ecotourism as well as to analyse the relationships between perception and ecotourism responsible behaviour. Other goal of this study was to analyse the relationship between ecotourism responsible behaviour and social factors. Data was collected in 4 villages adjacent to the Balikpapan bay, namely Maridan, Telemow, Binuang, and Mentawir. We used the quota technique to sample respondents. For each village, we took 40 respondents randomly. Data was then analysed using descriptive statistics, Spearman correlation, and Kruskal Wallis test. We found that community around the Balikpapan Bay thought that ecoto u rism was able to bring positive impacts for village and community. A Kruskal Wallis test revealed that there was no significant difference regarding perceptions among 4 villages. We found that there was a correlation between ecotourism responsible behaviour and gender. Implications of community’s perceptions to ecotourism development around the Balikpapan bay were then discussed. Keywords: ecotourism, perception, benefits, behaviour towards ecotourism, Balikpapan Bay","PeriodicalId":31303,"journal":{"name":"Jurnal Wasian","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45494615","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 volume estimation model is one of the most important components in developing sustainable forest management. Nowadays, various models for various types of forests in Indonesia have developed. Nevertheless, these models do not represent the type of forest ecosystem in Papua. Therefore, numerous studies are still needed to develop volume estimation model for various types of forests in Papua. This study was aimed to develop timber volume estimation model for commercial tree species in logging concession of PT. Tunas Timber Lestari in Sesnukt District, Boven Digul Regency, Papua Province. A total of 164 trees were chosen to develop the model and 50 trees for model validation. The result showed that diameter did not have a strong correlation with tree height. Therefore, the m odel should be developed using the combination of diameter and tree height. The best model in the development stage was selected based on the value of coeffi cient of determination (R 2 ) , standard error of the estimate (SEE), and F test . The best model in the validation stage was selected based on the value of bias (e), root mean square errors (RMSE), average deviation (SR), aggregative deviation (SA) , and χ 2 test . . The best model for timber volume estimation in PT. Tunas Timber Lestari are V = 0.00007594 D 1 . 978 H 0 . 923 . Keywords: commercial tree species, diameter, timber volume estimation, tree height, volume
{"title":"Timber Volume Estimation Model for Commercial Tree Species in the Logging Area Concession of PT. Tunas Timber Lestari in Boven Digul, Papua","authors":"F. J. Hutapea, Relawan Kuswandi","doi":"10.20886/JWAS.V6I1.4714","DOIUrl":"https://doi.org/10.20886/JWAS.V6I1.4714","url":null,"abstract":"The volume estimation model is one of the most important components in developing sustainable forest management. Nowadays, various models for various types of forests in Indonesia have developed. Nevertheless, these models do not represent the type of forest ecosystem in Papua. Therefore, numerous studies are still needed to develop volume estimation model for various types of forests in Papua. This study was aimed to develop timber volume estimation model for commercial tree species in logging concession of PT. Tunas Timber Lestari in Sesnukt District, Boven Digul Regency, Papua Province. A total of 164 trees were chosen to develop the model and 50 trees for model validation. The result showed that diameter did not have a strong correlation with tree height. Therefore, the m odel should be developed using the combination of diameter and tree height. The best model in the development stage was selected based on the value of coeffi cient of determination (R 2 ) , standard error of the estimate (SEE), and F test . The best model in the validation stage was selected based on the value of bias (e), root mean square errors (RMSE), average deviation (SR), aggregative deviation (SA) , and χ 2 test . . The best model for timber volume estimation in PT. Tunas Timber Lestari are V = 0.00007594 D 1 . 978 H 0 . 923 . Keywords: commercial tree species, diameter, timber volume estimation, tree height, volume","PeriodicalId":31303,"journal":{"name":"Jurnal Wasian","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46714182","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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