Jurnal Manajemen Hutan Tropika

Implementation Gap of Social Forestry Policy: The Case of HKm Beringin Jaya and HTR Hajran

2021-04-09T23:42:31+07:00

The 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 Growth of Lemongrass (Cymbopogon nardus (L.) RENDLE) in Agroforestry and Monoculture System on Post-Coal Mining Revegetation Land

2021-04-09T23:44:13+07:00

Lemongrass (Cymbopogon nardus) as cover crop was suitable planted with agroforestry and monoculture system on post-coal mining revegetation land. The study investigated the influence of planting system, varieties, and plant spacing against the lemongrass growth on post-coal mining land under the agroforestry and monoculture system. Two lemongrass varieties were planted under on both planting systems. The growth variables of lemongrass measured were the tillers number per clump, leaf length, and canopy width. The results showed that the planting system and lemongrass varieties were able to increase the growth of lemongrass. Plant spacing treatment was able to increase the tillers number per clump. The agroforestry system was able to increase leaf length and canopy width of lemongrass. However, monoculture system was able to increase the tillers number per clump. The G2 variety had better growth on all measured variables either in agroforestry and monoculture system compared to Sitrona 2 Agribun variety. The plant spacing of 0.5 m × 0.5 m had greater tillers number per clump of lemongrass compared to plant spacing of 1 m × 1 m.

Allometric Equations for Estimating Aboveground Biomass of Eucalyptus urophylla S.T. Blake in East Nusa Tenggara

2021-04-09T23:43:38+07:00

Understanding 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.

Implementation of The Concept of Conservation Area Buffer Zone in Indonesia

2021-04-09T23:45:21+07:00

Conservation area buffer zones are recognized to provide ecological, social, and economic benefits in supporting conservation areas' 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.

Impacts of Clear Cutting on Diversity of Ground Ants (Hymenoptera: Formicidae) in Pine Plantation Forest in Sukabumi Forest Management Unit, West Java

2021-04-09T23:41:57+07:00

Clear cutting is the main source of timber production of plantation forest management in Indonesia, but this activity disrupts the lives of ground ants. It is rarely known how clear cutting affects the ground ant community in the Indonesian plantation forest. The study aimed to analyze the impacts of clear cutting on the diversity of ground ants in the pine plantation forest of Sukabumi, West Java. The study compared the community structure of ground ants before clear cutting and after clear cutting. Ground ants were collected using a pitfall trap. Trapping of ground ants was carried out six days before the clear cutting and six days after the clear cutting. The ground ants were identified to the morphospecies level and classified into their functional role. The results showed that clear cutting alters the community indices of ground ants. Abundance, morphospecies composition, diversity index, richness index, and evenness index of ground ants after clear cutting was lower compared with those before clear cutting. The clear-felled area due to clear cutting provided favorable habitat for the generalist groups of ground ants, but negatively affected the predator and forager groups of ground ants. These findings can be used as an important factor in the development of environmenllyt-friendly forest harvesting systems in Indonesian plantation forests.

Canopy Cover Estimation in Lowland Forest in South Sumatera, Using LiDAR and Landsat 8 OLI imagery

2021-04-09T23:44:47+07:00

Canopy 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%.

Structure and Dominance of Species in Mangrove Forest on Kutai National Park, East Kalimantan, Indonesia

2021-04-09T23:43:04+07:00

The 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.

FRONT MATTER

2021-04-09T23:45:55+07:00

https://doi.org/10.7226/jtfm.27.1.fm

BACK MATTER

2021-04-09T23:41:23+07:00

https://doi.org/10.7226/jtfm.27.1.bm