Jurnal Manajemen Hutan Tropika
Not a member yet
600 research outputs found
Sort by
Carbon Sequestration Potential in Aboveground Biomass of Hybrid Eucalyptus Plantation Forest
Get PDFForests are a significant part of the global carbon cycle. Forests sequester carbon by conducting photosynthesis, which is the process of converting light energy to chemical energy and storing it in the chemical bonds of sugar. Carbon sequestration through forestry has the potential to play a significant role in ameliorating global environmental problems such as atmospheric accumulation of GHG\u27s and climate change. The present investigation was carried out to determine carbon sequestration potential of hybrid Eucalyptus. This study was conducted primarily to develop a prediction model of carbon storage capacity for plantation forest of hybrid Eucalyptus in Aek Nauli, Simalungun District, North Sumatera. Models were tested and assessed for statistical validity and accuracy in predicting biomass and carbon, based on determination coefficient (R) and correlation coefficient (r), aggregative deviation percentage (AgD), and the average deviation percentage (AvD). The best general model to estimate the biomass of hybrid Eucalyptus was Y = 1351,09x^0,876. e^(0,094). Results showed that hybrid Eucalyptus had an average above-ground biomass in year 0 (the land without the eucalyptus trees) up to year 3 as large as 1.36, 11.56, 43.18, and 63.84 t ha. The carbon content of hybrid Eucalyptus were 0.61, 5.2, 19.43 t^(-1), and 28,73 t^(-1) C ha while the carbon sequestration potential were 2.23, 19.08, 71.31, and 105.43 t^(-1) CO ha^(-1) respectively
Javan Rhino (Rhinoceros sondaicus Desmarest 1822) Utilization Distribution and Habitat Selection in Ujung Kulon National Park
Get PDFJavan rhino (Rhinoceros sondaicus Desmarest 1822) is one of world\u27s rarest endangered species (IUCN 2008). Currently, their distribution is limited to Ujung Kulon National Park (UKNP) of Indonesia. Natural disasters, disease, poaching, encroachment, and competition are threats facing Javan rhino\u27s population, hence creating pockets of habitats outside the UKNP was necessary and should be based on scientific studies of javan rhino utilization distribution and habitat selection in UKNP as the natural habitat. The objectives of the study were to determine the utilization distribution of Javan rhino and its habitat characteristics and determine javan rhino habitat selection within UKNP. The research indicated that Javan rhinos highest use of areas comprised of swampy shrub (w = 2.197) and shrub (w = 2.012), relatively open habitat (w = 4.233), flat area (w = 1.313) and slightly sloping areas (w = 1.007), lowland (w = 1.346), close to river (w = 1.087), close to road network (w = 1.395), close to coasts/beaches (w = 1.862), close to wallowing areas (w = 3.709), and close to rumpang (w = 3.783). The results suggested that javan rhino showed selection and preferences for its habitat
Performance of Coral Reef Management within Marine Protected Areas: Integrating Ecological, Socioeconomic, Technological, and Institutional Dimensions
No full textThis research studied the characteristics and approaches that contributed to the successful of coral reef management (CRM) efforts. One such characteristic occurred in most case studies was the importance of integrating ecological, socio-economic, technological use, and institutional dimensions during all processes. Based on a multi-dimensional analysis, the sustainability of CRM was 56.34% cumulatively, indicating a moderate level of management. This study further suggested the importance to improve technology and institution to achieve an effective CRM since both dimensions have contributed only 38.80% and 49.26% respectively. Stakeholder involvement was also central to the success of networking development within the management of Cenderawasih Bay National Park, specifically in facilitating the integration of ecological, socioeconomic, political will, and local cultural objectives in achieving an optimum planning objectives. Compilations of baselin information (both scientific and local knowledge) were important to evaluate the effectiveness of all processes and for adaptive management to increase its potential in the management strategies. Balancing the integration of all management dimensions (ecology, socio-economic, technology, and institution) in the whole processes with specific attributes in each case, would lead to an adaptive management for the implementation of conservation and management process
Hydrological Services of Forests and Their Compensation Initiatives
Get PDFRapid decreas of natural forest, and more frequent disaster related to the roles of forest on precipitation, flood, drought, erosion, and sedimentation as well as landslides, biodiversity, and carbon sequestration have driven initiatives to find out economic instruments for raising incentives for better land rehabilitation and forest management. Payment or compensation for hydrological services of forest is one of economic instruments that was initiated to address water availability, flood and drought, erosion, and sedimentation issues. Hydrological services of forest to some extent are still debatable, and the magnitude of the services or influences of forest varies depending on the quality of forest cover and soil, climate, and physical characteristics of land. In most cases, payment or compensation schemes of forest services to the land owner or manager that have been implemented already, do not consider the actual forest hydrological services yet. Nevertheless, those payment schemes have been driving the activities of better land and forest uses, although they are still limited to small scales relative to the whole required area to produce forest hydrological services. This article reviews the hydrological services of forests and their compensation scheme developed in Indonesia
Respons Hidrologi Akibat Deforestasi di DAS Barito Hulu, Kalimantan Tengah
Get PDFThe landcover change, particularly deforestation, can to affect of hydrological response on watershed.Deforestation of natural forest is identical to degradation of watershed functions, such as loos of land productivity due to increased soil erosion, runoff, evapotranspiration, and decreased of water storage. The main objective of this study is describes the hydrologic response on the Barito Hulu watershed due to landcover change (particularly deforestation) by the use Soil and Water Assessment Tool (SWAT) model. The result of the study showed that decreasing of forest area was 9.51% from initial condition can increase water yield, evapotranspiration, and erosion as much as 8.52%, 5.94%, and 1.73 t ha-1 year-1, respectively. Otherwise, water storage decreased as much as14.46%. The landcover on 1990 with rainfall 3,117.10 mm year-1 provided water yield of approximately 1,387.13 mm, evapotranspiration of 1,152.10 mm, water storage of 577.87 mm, and erosion of about 20.52 t ha-1 year-1. The landcover on 2003 with rainfall 2,613.2 mm year-1 provided water yield of approximately 1,385.50 mm, evapotranspiration of 1,121.10 mm, water storage of 106.60 mm, and erosion of about 33.15 t ha-1 year-1 with erosion tolerance of about 43.57 t ha-1 year-1
Precision of Nest Method in Estimating Orangutan Population and Determination of Important Ecological Factors for Management of Conservation Forest
Get PDFOrangutan as an umbrella species is closely interlinked with sustainable forest management meaning that the protection of this species has implications on the protection of other species and maintain ecosystem stability. The total natural habitat required to support orangutan’s population could only be determined by the appropriate population size. It is associated with the carrying capacity to accommodate or fulfill the habitat requirements of a wildlife population. Selection and delineation of core and wilderness zones as habitat preference should be based on the results of preference test shown by the spatial distribution of orangutan population. Value of the coefficient of variation (CV) was used to observe the precision of the population estimation and to identify important ecological factors in selection of nesting trees. The study resulted in varied CV spatial values for various habitat types: 22.60%, 11.20%, and 13.30% for heath, lowland dipterocarp, and peat swamp forest, respectively. In the other side, CV temporal values for various habitat types were 5.35%, 22.60%, and 17.60% for heath, lowland dipterocarp, and peat swamp forest, respectively. This indicated that the population density in each type of forest ecosystems had a variation based on location and did not varied according to time of survey. The use of nest survey technique showed good reliable results in estimating orangutan population density. Efforts to improve the precision of estimation can be done by formulating r value as the harmonic average of nest production rates and t as the average of nest decay time per nest category. Selection of habitat preference and nest trees were influenced by food availability thus should form important consideration in conducting nest survey to avoid bias in estimating orangutan populations
Effect of Corrupt Behavior of the Forestry Bureaucrats on the Forest Sustainability
No full textThis article show that corrupt bureaucrats do not always result in a negative effect on the forest sustainability. Even under a certain condition, a corrupt behavior may result in a positive effect on the forest sustainability. An inappropriate policy is more important a cause of the forest sustainability than a corrupt behavior. Therefore, fixing this structural mistake needs to be prioritized in combating the forest destruction, for this structural mistake is the real primary cause of the forest destruction in Indonesia. Fixing this structural mistake is much more effective in combating the forest destruction than finding honest bureaucrats.
Worker’s Competency and Perception toward Safety and Health on Forest Harvesting Operation in Indonesian Long Rotation Plantation Forest
Get PDFDespite of prevention measures such as government regulations and recommendations through technical and managerial researches, unsafe working practices are still a common practice in Indonesia\u27s forestry work, especially in tree harvesting operation. In order to determine competency level of both field supervisor and workers as a baseline in developing participatory occupational safety and health (OSH) protection program, a previously developed competency assessing instrument has been modified. Further, the redesigned instrument was used to verify competency level of field supervisor and forestry workers (chainsawman, hauling workers, and truck drivers) from 6 different forest sites with similar working method. Results showed that both group of respondents had overestimated their competency level in practical aspect, indicated by the gap existence between OSH self-perception value and the standard-based assessment value. The gap significantly occurred in knowledge, skill, and attitude elements; however working attitudes rest in the worst level. This finding then indicated that improving working attitude should be taken as the goal priority in the OSH protection programs in Indonesia. In short, when the discussion is pointed to practical activities, OSH protection program should adapt such strategies which put serious consideration on control mechanism
Analysis and Mapping of Stakeholders in Traditional Use Zone within Marine Protected Area
Get PDFThis research is greatly needed in order to accommodate the interest and influence of stakeholders and to find solution to conflict of interests among the stakeholders. As a case study, it was conducted in traditional utilization zone of Cendrawasih Bay National Park (CBNP) at Teluk Wondama Regency from August 2010 to June 2011 using qualitative method. The aim of the research was to formulate pro-and-contra conditions that might have a potential to create conflicts and to find out suitable strategies to resolve the conflicts to improve governance and management. The result shows that most stakeholders are mapped as key players of conflicts interest. The analysis also found that stakeholders were distributed as a subject, key player, and context setter, and no stakeholder was classified as a crowd category. This result implied that most stakeholders have an interests and influences to create good governance and to keep a sustainable development in the traditional use zone. Based on this finding, it can be stated that the existing conflict patterns were categorized as open and latent conflicts. These conflicts can be resolved by creating collaboration among Management Body local community, NGOs, and local government through strengthening the institutional capacity for the management of traditional use zone
Internalizing Externalities through Payments for Environmental Services
Get PDFForest ecosystems, including plantation forests, provide goods and services that are marketable and non-marketable. Positive externalities produced by forest ecosystems are rarely considered in pricing of marketable products that result in economic inefficiencies. Internalizing externalities is required to improve the economic efficiency. The traditional way to internalize an externality is by providing subsidies or imposing taxes. Recently, payments for environmental services are receiving more attention as an instrument for internalizing externalities provided by forest ecosystems. This promising alternative to improve our environment needs to be studied more extensively. In this paper, it can be indicated theoretically that the Pigovian tax, as a traditional way of addressing environmental problems, is able to mimic the result derived from the employment of environmental services payment. The difference is that environmental services payment improves the welfare of environmental service producers, whereas the Pigovian tax reduces it. A positive Pigovian tax increases the optimal rotation, which is positively associated with environmental improvement, but certainly reduces forest owner\u27s welfare. This difference should be taken into account in the public policymaking so that perverse incentive may be avoided. Payment for environmental services as an additional income to forest growers, not as alternative source of income, is a potential tool to address simultaneously issues of environment and poverty that are frequently contested