bluuebunny/crossref_metadata_2025_split huggingface dataset:
Students’ ability to reading the map of Merapi Volcano hazardous area
Authors: Indyastuti Tri , Widiyatmoko Wahyu , Dewi Ratih Puspita 
Published: March 2024

Abstract
The map is a complete picture of phenomena in a particular area or location within a certain period. It can explain the distribution, interactions, and associations that occur. Success in reading maps is required for two things, namely, the quality of the map and the competence of map readers. This study analyzed students’ ability to read maps of Merapi Volcano hazardous areas by students at SMA Negeri 1 Cangkringan, Sleman Regency. This study used a quantitative approach using primary data obtained through tests. This study used a non-probability sampling technique with a sample of 64 students of class XI Social Sciences at SMA Negeri 1 Cangkringan. The analysis technique used was descriptive statistical analysis. The results showed that the level of ability to read the Merapi Volcano hazard map by students at SMA Negeri 1 Cangkringan 14 students (21.9%) belonged to the moderate category, and 50 students (78.1%) were in the high category. Therefore, the average score for the student’s ability to read the Merapi Hazardous map was 76.23 (moderate category). The results of the ability to read maps when viewed by gender showed that out of 28 male students, six students (21.4%) belonged to the moderate category, and 22 students (78.6%) were in the high category. Meanwhile, for female students, there were eight students (22.2%) in the moderate category, and 28 students (78.8%) were in the high category.
Liquefaction potential hazard assessment and its effect on toll road construction in Seyegan Subdistrict, Yogyakarta
Authors: Setiadi W P , Faris F , Setiawan H 
Published: March 2024

Abstract
Toll road construction is a vital infrastructure connecting the two economic centers on Java Island. However, given the potential disaster risks in the region, it is essential to assess the geological and geotechnical conditions to determine the potential for liquefaction in the area. The special region of Yogyakarta is susceptible to earthquakes and associated disasters. One of the most significant earthquakes occurred on May 27, 2006 with a magnitude of 6.3 Mw resulting from the Opak Fault. Furthermore, the toll road is constructed above the Mataram Irrigation Canal, characterized by a shallow groundwater level and young volcanic deposits that are vulnerable to liquified. The study aimed to determine the potential for liquefaction in the area and predicted the vertical settlement caused by liquified soil. The analysis of liquefaction potential utilized the simplified procedure to obtain factor of safety and Liquefaction Severity Index (LSI) to assess the vulnerability index of liquefaction. Results indicated the research area had a very low to medium liquefaction susceptibility index. In addition, the calculation of vertical settlement using Idriss and Boulanger (2008) equation showed a predicted vertical settlement range of 0.4 cm – 44.64 cm. The predicted vertical settlement range underscores the importance of considering the potential for liquefaction to mitigate any adverse effects on the toll road’s construction and operation.
Toponymy analysis as geosocial cultural approach on disaster mitigation studies in Sumberagung Village Pracimantoro District Wonogiri Regency
Authors: Amandanu R , Arijuddin B I , Jauhari A , Ariseno I A 
Published: March 2024

Abstract
Disaster mitigation studies with a geographical, social and cultural approach can be carried out on a system of place names known as toponymy. Toponomy generally has a relationship with the characteristics of the region. Sumberagung Village, located in Pracimantoro District, Wonogiri Regency, Central Java, has a unique character as a karst area. This study aims to analyze the toponymy of Sumberagung Village which is related to the spatial, social, and cultural context as a study of disaster mitigation in the region. The research method uses descriptive qualitative analysis with interview techniques, documentation and field surveys. The results of the study show that the Toponymy of Sumberagung Village contradicts the factual conditions of the environment. The name “Sumberagung” which means a large water source has the characteristics of an area that is prone to drought. The history of the name Sumberagung Village comes from deep contemplation, prayer and hope to find a large source of water that can be used in mitigating drought. The expectation of a large supply of water forces the community and the government to make efforts which are manifested as policies, tracing karts water sources that are below the surface, and providing water resources infrastructure. These efforts show that toponymy indirectly has a relationship with disaster mitigation in Sumberagung Village.
Modification of rain and run-off erosivity to predict erosion hazard level on The Manguan Sub-watershed’s Upper Slope
Authors: Ahmad  , Muryani Chatarina , Noviani Rita 
Published: March 2024

Abstract
To protect natural resources and maintain the normal functioning of hydrological processes, the upper slope of the Manguan Sub-watershed should be designated as a conservation area. However, agricultural activities in the upstream have disrupted the watershed’s hydrological function, triggering high rates of erosion, sedimentation, and flooding. The aim of this research was to estimate the level of erosion hazard on Manguan Sub-watershed’s Upper Slope and its conservation directives to mitigate it. This study adopted a land unit approach to flow occurrence land units with the prediction of MUSLE (Modified Universal Soil Loss Equation) by integrating rainfall and run-off erosivity. The direction of land conservation will be evaluated through the perspectives of land rehabilitation and soil conservation. Based on the result, the prediction of erosion hazard levels is classified into four groups: Low, Moderate, High, and Extremely High. The Manguan Sub-Watershed’s Upper Slope has a significantly high level of erosion and necessitates soil conservation improvement measures on approximately 79% of its area.
Landslide potential mapping in Pituruh District of Purworejo by using geographic information system
Authors: Maryani M. , Kiat U. E. I. , Priyono K. D. , Ramadhan A. B. , Yudha V. P. 
Published: March 2024

Abstract
Located in Purworejo Regency, Pituruh is an area that prone to a landslide. Disaster mapping was a strategy that has been done so far by the government institutions and academia. According to its topography, Purworejo has been dominated by slope with more than 30 degree. The creation of landslide vulnerability map was carried out through several stages, namely, calculating rainfall at 6 stations located in Pituruh district, then producing average rainfall data to be used as a reference to create a rainfall map, then overlay process. Referring to the 4 parameters used, slope became an important parameter to determine the level of landslide vulnerability in Pituruh. The development of Geographic Information Systems can provide various types of spatial data related to the earth’s surface, and has the ability to perform accurate spatial analysis. Mitigation aims to reduce risks that have the potential to become disasters or reduce the effects of disasters. This study represents the level of vulnerability in Pituruh district by classifying the existing level. The results of this study have 5 classifications with different areas, namely highly vulnerable that covers 240.27 ha, moderately vulnerable for about 2237.81 ha, moderate with 3322.68 ha, vulnerable by 3040.14 ha, and not vulnerable area of 24.72 ha.
The use of oil palm biomass as fertilizer and its potency in agroforestry systems for peatland rehabilitation
Authors: Muhammad D N , Sa’adah L , Rahayu A N , Safitri D E , Itisham M M , Solikhin A , Istomo  , Setiawan Y , Budi S W , Muryunika R , Hartoyo A P P 
Published: March 2024

AbstractOil palm biomass is one of the most abundant wastes in Indonesia. The biomass can be used as fertilizer for increasing plant growth, such as paddy Inpara-2 variety and peatland rehabilitation. The study on the application of oil palm biomass as fertilizer on paddy Inpara-2 growth and its potency in agroforestry systems for accelerating peatland rehabilitation is limited. This study aimed to analyze the application of oil palm-based fertilizers on paddy Inpara-2 and investigate the scientific literature on the use of oil palm biomass as fertilizer in agroforestry systems for peatland rehabilitation. The method used was a completely randomized design with a factor (oil palm-based fertilizer) and scientific literature from the search engine database. Application of micro-lignocellulose 1% resulted in the best paddy germination percentage (100%), abnormal sprout percentage (0%), maximum growth potential (100%), mean germination time (1.95 days), seedling survival rate (100%), and seedling height (13.67 cm). We found 993 articles on oil palm biomass as fertilizer in supporting peatland rehabilitation and only three articles (0.003%) used the agroforestry system as the selected approach. Application of oil palm biomass as fertilizers can accelerate paddy Inpara-2 variety growth, and agroforestry system application could accelerate peatland rehabilitation.
Value chain analysis for community livelihoods in peatlands: A case study in Southern Riau
Authors: Ilham Q P , Purnomo H , Rohadi D , Puspitaloka D , Herawati T , Brady M A , Dermawan A , Okarda B 
Published: March 2024

Abstract
Many of the Indonesian peatlands have been cleared of forest, then drained and burned for both large- and small-scale agricultural crop development. This has resulted in regular occurrences of haze from peatland fires during the dry season. Peatlands have long been a livelihood source providing up to 80% of earnings for nearby local communities. Nevertheless, many such communities apply unsustainable practices involving the use of fire for land preparation and drainage of wet healthy peatland ecosystems. For that reason, haze-free sustainable livelihoods need to be found immediately. This research analysed commodities traded in local markets as well as those with the potential for trade that could be grown in targeted villages. We collected data through market observations, focus group discussions and key informant interviews in nine targeted villages. Using Value Chain Analysis (VCA) methods, we analysed and assessed each commodity for their value chain distribution and governance, and power relations. The results of these assessments indicate that pineapple, areca nut, honey and fish are financially viable for generating income throughout the year and have fewer environmental impacts. These commodities have potential for consideration as alternatives in lieu of oil palm, which requires peatland drainage and often use of fire.
Productive Carbon Forest: Agroforestry with high economic forest commodities to increase carbon stocks and community welfare in Garut Indonesia
Authors: Nurrochmat N A , Purwawangsa H , Mutaqin F , Ridwan M , Qanitha M , Mustakiman  , Putra S A , Nurkholid Y , Perdhana R D 
Published: March 2024

Abstract
24.7 million hectares of Forest areas are not covered with forest, and the community limits its management because it is prohibited by law. However, the forestry sector only contributes 0.6% of Indonesia’s GDP. Therefore, IPB University collaborates with ASTRA International to develop a productive carbon forest in Garut Regency. Agroforestry uses highly economic forest commodities. This program was very well received by the community there. Around 52.86 hectares of tea gardens and other plantations became productive carbon forests and are expected to be fruitful and profitable three years later. It planted 13,082 avocado trees, 71,070 coffee trees, and 8,270 hardwood trees. Assistance was carried out from the beginning of the program about six months ago and will continue until the fruit harvesting. This program is expected to continue for 20 years and give a profit of around IDR 596,567,022 (USD 3,9846) /hectare/year. It is anticipated that this undertaking will serve as a pilot project for improving the social forest in Indonesia and could increase both the ecology and community welfare. Nevertheless, this productive carbon forest is expected to succeed in Indonesia’s FoLU (Forest and Other Land Use) Net Sink 2030 and Indonesia’s domestic carbon market, established at the end of September 2023.
Metagenomic analysis of soil forest microbiota on Mount Ungaran, Central Java, Indonesia
Authors: Susanti R , Widiatningrum T , Jaya A F , Nisa’ F F , Kenarni N R , Mukaromah R L 
Published: March 2024

Abstract
The ecological functions of forest soils are largely determined by the activities of soil microorganisms. This study aims to analyze the diversity and abundance of microbes in forest soil on Mount Ungaran, Ngesrepbalong Village, Kendal Regency, Central Java, Indonesia. This study used an exploratory observation method. Five hundred grams of forest soil was collected aseptically for chemical and metagenomic analysis. Metagenomic analysis was carried out based on 16S rRNA gene markers V3-V4 region. The result showing that the forest soil was dominated by bacteria of the order Rhizobiales (13.17%), Thermincolales (9.29%), and Vicinamibacterales (6.95%), as well as archaea of the order Nitrososphaerales (62.89%), Nitrosotaleales (4.61%), and Nitrosopumilales (1.67%). At the genera level, forest soil was dominated by Thermincola (8.42%) and Bacillus (7.39%), and one genera of archaea, namely Nitrososphaeraceae (23.17%). The bacteria that dominate forest soil are a group of Plant Growth Promoting Bacterial Agents (PGPB) in the nitrification process. Meanwhile, archaea that dominate forest soil act as ammonia oxidizing agents (AOA).
The potential of pulau dua nature reserve as a blue carbon reservoir in climate change mitigation using Sentinel-2 MSI imagery
Authors: Adni S F , Winata B , Rusdiana O , Bagaskara A , Daniswati N , Anastasya E , Fawaz J A , Zaki M , Ghaida S H , Nugroho A 
Published: March 2024

AbstractClimate change is a long-term change in weather patterns that occurs on a global scale. Climate change has had impacts in various parts of the world. Mangrove ecosystems in Pulau Dua Nature Reserve contribute to the improvement of climate change through blue carbon reserves. The study aims to determine the blue carbon reservoir in the Pulau Dua Nature Reserve area using Sentinel-2 MSI imagery. The research was conducted from March to May 2023 using remote sensing methods. Data collection using open-source image Sentinel-2 image, then processing and analyzing data with composite images and finally calculating carbon stocks. The results showed that the blue carbon reservoir obtained was 537.89 tons, which means that the mangrove ecosystem in the Pulau Dua Nature Reserve is able to store more carbon than other forest types. This is because the mangrove ecosystem has great potential in reducing and dealing with disasters due to climate change in the era of global warming.
Soil disturbance caused by timber harvesting in a natural forest, West Sumatera Indonesia
Authors: Matangaran J R , Suwarna U , Santosa G , Trison S , Putra E I 
Published: March 2024

Abstract
Logging operations in natural forests generally use bulldozers. Bulldozers skid logs from the stump site to the landing site. The bulldozer maneuvers in the felling area cause skid trails and soil compaction. Soil compaction is one of the negative impacts of logging operations. The research aim is to analyze the level of soil compaction in various bulldozer skidding intensities after logging operations. The research occurred at a natural forest area in Siberut West Sumatera, Indonesia. The results of the study showed that there was a relationship between skidding intensity and the level of soil bulk density. The more a bulldozer moves at the same skid trail, the higher the soil bulk density. The range of soil bulk density is from 0.82 g cm−3 to 1.31 g cm−3. The bulk density increases markedly after the bulldozer’s first, second, and third passes. After the fourth pass, the bulk density is relatively constant. The porosity of the soil decreases with the increase of the bulk density. On skid trails where the soil is very compact, seeds that fall on skid trails will have difficulty growing well. Requires planting on primary skid trails. Soil damage in the form of soil compaction by bulldozers needs serious attention in the Reduce Impact Logging technique.
Community social capital in managing the simanuk-manuk village forest in forest management unit region iv balige, toba regency
Authors: Saraan M , Rahmawaty  , Harahap R H , Hilmi E 
Published: March 2024

Abstract
Social capital is a collection of resources owned by individuals and communities, which are used in social interaction and community building. This study aims to identify the social capital in Simanuk-Manuk Village Forest (VF) in Forest Management Unit (FMU) Region IV Balige, Toba Regency. Data were collected through interviews, observations, and literature study. Social capital was analyzed qualitatively which categorize into structural (roles and rules) and cognitive (norms, values, attitudes, beliefs). The results showed that community’s social capital contributes to VF management, encouraging them to preserve the forest. In structural social capital, the Village Forest Management Institution has statutes that regulate community’s roles and rules in managing forest. Communities are involved in preparation and implementation activities. In cognitive social capital, norms are still adherence including unwritten rules such as rituals when entering forest referred to as mamele (praying to ancestors). Customary traditions strengthened the value of social capital and maintain cultural sustainability. The community’s attitude in utilizing forest doesn’t cause social inequality. They believe that forest is a vital component of life, particularly as a provider of clean water and air. They also believe that forest has sacred and spiritual values that encourage them in preserving forest from degradation.
Population structure and distribution pattern of endangered species, Dillenia pentagyna, in Indonesian natural reserve forest
Authors: Qur’ani C G , Rahman A , Dessy U A , Aryanti N A , Wibowo F A C , Pramesti V I 
Published: March 2024

Abstract
Regeneration strategy of endangered species is crucial for maintaining ecosystem sustainability in its endemic habitat. Dillenia pentagyna is a deciduous tree species with many potential benefits for medical use, silkworms’ fodder, and furniture, and is considered as an endangered tree species in Indonesia due to over exploitation in 1980s. The species is an important asset for Gunung Abang Natural Reserve Forest (GANRF) due to essential historical functions for flora, fauna, and local communities. We conducted an initial research to observe the population structure and distribution pattern of D.pentagyna in its native habitat to understand the growth- and population behavior. Using a random sampling method, we built 157 plots to identify the number of seedlings, saplings, poles, and trees followed by measurement of height and diameter-breast-height. We only found fifteen poles, six saplings, five trees, and no seedlings in the plots with dominant distribution in the center of GANRF area. The distribution pattern was random according to Morisita index (Iδ= 0.011 equal to 0), which explains that D.pentagyna grows randomly in nature independent to canopy gaps and slopes. Findings suggested that low population needs to be recovered by seedling initiation growth in the nursery before sowing in the field to avoid high mortality.
The Impact of canal blocking to reduce fire risks and carbon emissions on tropical peatland, Siak District, Riau Province
Authors: Safitri R , Saharjo B H , Basuki I 
Published: March 2024

Abstract
Tropical peatlands are wetland ecosystems formed from the accumulation of organic matter over thousand of years period. Indonesia has an area of about 13.5 million ha and play important roles for society and the environment. The development of drainage canals has caused peatlands to become dry and degraded, rendering them highly susceptible to fires. Peatland restoration through rewetting activities with canal blockings can restore the hydrological function of peatlands. In addition, groundwater level (GWL) also affects carbon emissions from peatlands. This study aims to determine the distance of canal blocking effect on groundwater level so that it can be known which areas have a lower risk of fire and carbon emissions in peatlands. This study compared areas affected by canal blocking with those without canal blocking. The results of this study show the significant effect of canal blocking in increasing the groundwater level in areas with <100 m distance from the canals and with different types of land use. The average GWL of peat during one year of monitoring period was around - 26.67 ± 2.4 cm at the location of the monitoring well close to the canal with canal blocking, equivalent to carbon emissions of 26.5 tCO2eq ha−1 year−1. This is lower than the average GWL of those areas without canal blocking that was - 58.67 ± 3.1 cm, which is equivalent to carbon emissions of 57.8 tCO2eq ha−1 year−1.
Variation in seed morpho-physiological traits of Nauclea orientalis L. in a seedling seed orchard and the effect of seed sortation on their physiological parameters
Authors: Danu  , Rustam E , Cahyono D D N , Sudrajat D J 
Published: March 2024

Abstract
The aim of this study was to identify the morpho-physiological diversity of seeds in several mother trees of N. orientalis at 6-year-old in a seedling seed orchard in Parungpanjang, Bogor and to identify the effectiveness of seed sortation in improving the seed germination. A total of 17 mother trees were collected for their fruit, measured the morphology of the seeds and tested their germination. The results showed that fruit and seed dimensions and weight, germination capacity were strongly influenced by the mother tree. Germination capacity and the highest germination capacity was resulted by family no. 22-BT (90%) and 48-MJ (92%). The highest coefficient of variation was given by seed weight per fruit (83.03), followed by germination capacity (66.66) and fruit weight (65.95). Seed sortation had a significant effect on germination capacity, germination rate, and mean germination time, but had no significant effect on germination value. In general, a sieve size of 300-420 μm gave the best results for increasing germination capacity (59.5%), germination rate (1.67% day-1), and mean germination time (18 days). Other sieve sizes, i.e., 420-600 μm was also able to improve seed germination so that for seed sortation applications 300-600 μm sieve sizes can be used.
Seed vigour testing of Acacia mangium Willd. as a result of mutation
Authors: Keumala C F , Wulandari A S 
Published: March 2024

Abstract
Plant breeding techniques are applied to increase the genetic variation of a plant. Induction of plant mutation using gamma irradiation is one of the methods that can be applied to improve the genetic diversity of plants. This study aims to analyze the vigour of mangium seeds treated by mutation. Mutation treatment was administered to M0 of mangium seed. This study used M2 mangium seeds and control mangium seeds (without mutation treatment). Several assays, such as growth, stress, and biochemical tests, were conducted to determine the mangium seed’s vigour. The growth test showed that M2 mangium seeds had higher germination values, germination height, dry weight, and vigour index than control mangium seeds. The stress test consisting of the Hiltner test, accelerated ageing test, and saturation test of the germination value of M2 mangium seeds wass higher than control mangium seeds. In the biochemical test, the electrical conductivity value of control mangium seeds was more significant than M2 mangium seeds. In general, M2 mangium seeds had higher vigour than control mangium seeds.