Jurnal Manajemen Hutan Tropika
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Structure and Dominance of Species in Mangrove Forest on Kutai National Park, East Kalimantan, Indonesia
Get PDFThe Kutai National Park (KNP) which is located in East Kutai Regency on East Kalimantan Province is endowed with numerous pristine of mangrove forest. However, related information to the species composition and diversity of KNP mangrove is still scanty. Twenty-one of mangrove species were recorded using the quadratic transects survey method (total plot area of 1.7 ha). Main species of mangrove communities were Avicennia lanata, A. marina, Bruguiera gymnorrhysa, B sexangular, Ceriops tagal, Rhizophora apiculata, R. mucronata and Sonneratia Alba. Mangrove density was recorded reached as 1,699 trees ha-1, saplings of 4,395 ha-1 and seedlings 25,348 ha-1. Significant tree density was found in Pandan Bay Estuary. While in the Lombok Bay and the Kaba Bay significant for sapling and seedling categories. Importance value index of mangrove species in the three study locations for three growth categories (tree, sapling and seedling) showed significant differences (p-value> α0.05). Mangrove stand at three study locations has almost the same characteristics. The species diversity and evenness index has shown the same distribution pattern. The findings of this study suggest that KNP mangrove forest stand is not heavily damaged even though there is a lot of human activity. This mangrove could be managed and conserved for multi-sectoral purposes such as ecotourism, research, biodiversity and education rather than solely as a Nature Conservation Area
Allometric Equations for Estimating Aboveground Biomass of Eucalyptus urophylla S.T. Blake in East Nusa Tenggara
Get PDFUnderstanding the essential contribution of eucalyptus plantation for industry development and climate change mitigation requires the accurate quantification of aboveground biomass at the individual tree species level. However, the direct measurement of aboveground biomass by destructive method is high cost and time consuming. Therefore, developing allometric equations is necessary to facilitate this effort. This study was designed to construct the specific allometric models for estimating aboveground biomass of Eucalyptus urophylla in East Nusa Tenggara. Forty two sample trees were utilized to develop allometric equations using regression analysis. Several parameters were selected as predictor variables, i.e. diameter at breast height (D), quadrat diameter at breast height combined with tree height (D2H), as well as D and H separately. Results showed that the mean aboveground biomass of E. urophylla was 143.9 ± 19.44 kg tree-1. The highest biomass were noted in stem (80.06%), followed by bark (11.89%), branch (4.69%), and foliage (3.36%). The relative contribution of stem to total aboveground biomass improved with the increasing of diameter class while the opposite trend was recorded in bark, branch, and foliage. The equation lnŶ = lna + b lnD was best and reliable for estimating the aboveground biomass of E. urophylla since it provided the highest accurate estimation (91.3%) and more practical than other models. Referring to these findings, this study concluded the use of allometric equation was reliable to support more efficient forest mensuration in E. urophylla plantation
Abundance of Associated Arbuscular Mycorrhizal Fungi with Pioneer Plants in Affected Area by Mount Merapi Eruption
Get PDFArbuscular mycorrhizal fungi (AMF) with mutualism symbiosis with plants are associated with the Fabaceae family\u27s pioneer plants. This study aims to determine the percentage of AMF in the roots and the AMF spore\u27s abundance in the rhizosphere of pioneer plants Calopogonium mucunoides Desv. and Vigna Unguiculata (L.) Walp in Mount Merapi National Park after the 2010 eruption. The methods used for root infection analysis were slide methods and root staining, while spore analysis was wet sieving methods. The results showed the highest percentage of AMF infection in C. mucunoides root was found in an area with moderate damage. The highest percentage of AMF infection in V. unguiculata was found in an area with minor damage. The highest number of spores in the two plants\u27 rhizosphere soil was found in an area with minor damage with an average of 10.4 and 9. The levels of damage by Mount Merapi\u27s eruption did not significantly affect the percentage of AMF infection and the number of spores. Glomus dominates all study sites in both plants. Soil organic carbon is one of the abiotic factors correlated with the number of spores in rhizosphere soil
The Mangrove Landscape and Zonation following Soil Properties and Water Inundation Distribution in Segara Anakan Cilacap
Get PDFThe mangrove zoning and landscape express the correlation between mangrove vegetation (density, biodiversity and species distribution) with environment factors like as water inundation, seatide, and soil properties. The research was conducted in Segara Anakan Lagoon to analysis community structure and mangrove landscape based on species distribution, biodiversity, environment factors, and mangrove zoning. The results showed that (a) Segara Anakan Lagoon had 4 mangrove zone\u27s were dominated by Sonneratia alba, Rhizophora mucronata, Avicennia marina, Rhizophora apiculata, Rhizophora styllosa, and Nypa frutican; (b) the structure of ecosystem was showed by trend of mangrove ecosystem with equation y = 35.34x2 923.85x + 12817 with x = time (year) and y = mangrove area (ha), mangrove density between 1333367 ind ha-1 (West Segara Anakan) and 899–567 ind ha-1 (East Segara Anakan), dominated species were Nypa frutican, Rhizophora stylosa, Rhizophora apiculata, and Aegiceras corniculatum and mangrove biodiversity between 2,572,65 (moderate); (c) structure of environment factor showed single and semi double-type tides, water debit between 0.360.73 m s-1; water depth between 0.20–23.7 m and water inundation between 480cm; soil texture was clay and loam, soil nitrate of 1.5 mg 100 g-1, soil phosphate of 1.5 mg 100 g-1, C organic of 1.31%, soil pH of 6–7, and soil salinity of 6.5–10 ppt
Implementation of The Concept of Conservation Area Buffer Zone in Indonesia
Get PDFConservation area buffer zones are recognized to provide ecological, social, and economic benefits in supporting conservation areas\u27 integrity. Nevertheless, little is known hitherto about the development dynamics of conservation area buffer zones in Indonesia. Therefore, a study concerning theory, policy, and management of the conservation area buffer zones in Indonesia is necessary to analyze its performance, identify problems in its implementation, and formulate its evidence-based development policy. This study aims to identify and analyze issues in implementing the concept of conservation area buffer zone as well as recommend policy formulation to accelerate the development of conservation area buffer zones in Indonesia. This study is an exploratory research through a literature review with semi-systematic approach. It finds that there are only nine out of 530 (1.7%) conservation areas in Indonesia with a formally established buffer zone. This condition is mainly due to the absence of buffer zone institutions at the regional government levels. Meanwhile, the management of supposedly buffer zones has been conducted through various projects for strengthening the functions of buffer zones by conservation area managers, either in the form of land-based or non-land-based projects. This study results in recommendations for all interested parties to urge the Ministry of Environment and Forestry and the Ministry of Home Affairs to promulgate and renew the regulations concerning the procedures of establishing and managing conservation area buffer zones. Moreover, regarding the institutional aspect, there is a need for a particular structure in both ministries to address community empowerment issues at the site level
Implementation Gap of Social Forestry Policy: The Case of HKm Beringin Jaya and HTR Hajran
Get PDFThe current social forestry policy is considered to accelerate the issuance of social forestry licences, but after the licence is obtained, various difficulties and obstacles are still experienced by licence holder community to achieve the objective of social forestry policy. For this reason, this study questions who is actually stakeholder or party stipulated in social forestry regulation to carry out social forestry and facilitate community to overcome the difficulties and obstacles they experienced. This study aims to analyze the implementation gap of social forestry policy towards those stipulated in social forestry regulation compared with their implementation in the field. This research was conducted at HKm Beringin Jaya and HTR Hajran. The results show that three groups of actors are stipulated in social forestry regulation, namely community with their rights and obligations, central and regional governments with their authorities and related stakeholders to support the implementation of social forestry. In two research locations, implementation gap of social forestry policy toward three groups of actors occurred in the field. The rights that can be obtained and the obligations that must be fulfilled by licence holder communities are mostly facilitated by non-governmental organizations and are influenced by the networking capacity of the community. The authority of the central and local governments to facilitate the community is not functioning adequately at the field level due to the separate political system and authority between the central and regional governments. The involvement of other related stakeholders is considered low because of their interests that must be accommodated and requiring the capacity of the community to access stakeholders
The Possibility of COVID-19 Pandemic in Eliminating Burning Activities: A Case Study at Ogan Komering Ilir Regency, South Sumatera
Get PDFForest and land fires occur almost every year in South Sumatera Province, including at Ogan Komering Ilir (OKI) Regency, mainly due to uncontrolled burning activities. This region has the largest peatland responsible for the adverse haze impacts. The advent of the coronavirus (COVID-19) pandemic in early 2020 has triggered massive consequences across the global communities, including Indonesia. Therefore, large-scale regulations on social restrictions were enacted. The purpose of this study is to analyze the variations in hotspots as forest and land fire indicators before and during the COVID-19 pandemic in OKI as well as to determine the rainfall effects. Daily Terra/Aqua MODIS satellite feeds and rainfall data between January 2018 and December 2020 served as the research materials. Subsequently, the paired t-test and correlation assessment were used to examine the hotspot variations in both datasets, respectively. The results showed significant statistical differences before and during the pandemic. Consequently, social restrictions were assumed to instigate the decline in burning activities. Furthermore, the rainfall demonstrated a vulnerable correlation to the hotspots, indicating that human factor was more pronounced as a fire trigger
Canopy Cover Estimation in Lowland Forest in South Sumatera, Using LiDAR and Landsat 8 OLI imagery
Get PDFCanopy cover is one of the most important variables in ecology, hydrology, and forest management, and useful as a basis for defining forests. LiDAR is an active remote sensing method that provides the height information of an object in three-dimensional space. The method allows for the mapping of terrain, canopy height and cover. Its only setback is that it has to be integrated with Landsat to cover a large area. The main objective of this study is to generate the canopy cover estimation model using Landsat 8 OLI and LiDAR. Landsat 8 OLI vegetation indices and LiDAR-derived canopy cover estimation, through First Return Canopy Index (FRCI) method, were used to obtain a regression model. The performance of this model was then assessed using correlation, aggregate deviation, and raster display. Lastly, the best canopy cover estimation was obtained using equation, FRCI = 2.22 + 5.63Ln(NDVI), with R2 at 0.663, standard deviation at 0.161, correlation between actual and predicted value at 0.663, aggregate deviation at -0.182 and error at 56.10%
Customary Forest Managements and Its Challenges in East Nusa Tenggara, Indonesia: An Implication of Constitutional Court Decision 2012
Get PDFCustomary forests have not been adequately recognized in state forest management in Indonesia for a long time. However, in the last decades, several fundamental policy changes occurred, and the roles of local communities significantly recognized in forest management. The forest tenure reforms for customary communities are actively addressed after the Constitutional Court Decision (CCD) Number 35 in 2012. The objectives of this study are (1) to determine the changes in customary forest management in response to the CCD and (2) to discuss policy challenges after the CCD in East Nusa Tenggara Province. This study employed qualitative descriptive analysis methods. The result showed the different responses of customary communities related to the institutional development towards CCD. The lack of local regulations regarding customary peoples\u27 rights still need to be solved. Besides, the claims of customary communities for customary forests overlapping with state conservation areas and other customary forests can make the problem more complicated
The Failure Factors of Collective Action in Promoting the Recognition of Customary Forest: Case of Kenegerian Rumbio Customary Forest in Riau Province
Get PDFOne of the five schemes in social forestry program in Indonesia is customary forest recognition. Kenegerian Rumbio Customary Forest, a customary forest in Riau Province, is failed in the recognition process. The objectives of this study are to analyze the failure factors of collective action and to formulate strategies to encourage the success of collective action on recognition of Kenegerian Rumbio Customary Forest. This research was built by using both quantitative and qualitative approach where the data were collected by using survey and in-depth interviews. The research results found that improper facilitation caused by communication issues between involved parties, the absence of the symbolic power, the failure in forming the common knowledge are the factors leading to the failure of collective action. To reconstruct the collective action, this study offered four strategies: (1) to frequently communicate with personal approach to the two highest indigenous leaders with whom facilitators have difficulty communicating well, (2) to mediate the two conflicted indigenous leaders for generating their motivation to propose their forest, (3) to conduct socialization to all indigenous leaders (40 jini) and community representatives to increase an understanding regarding the purpose and importance of recognition of customary forest, and (4) to conduct a participatory mapping to reduce area border issues among two sub-tribes