Jurnal Penelitian Kehutanan Wallacea

The economic value of Indonesia's tropical rainforest park (TH2TI) in South Kalimantan

Arfa Agustina Rezekiah — 2024-05-05

Urban forest is a form of environmentally oriented development. One form of urban forest in South Kalimantan is the Indonesia’s Tropical Rain Forest Park (TH2TI). This study aims to calculate the total economic value and future value of TH2TI. The total economic value calculated in this study consists of direct use value (recreation, wood, carbon and oxygen), indirect use value (water absorption), and option value (existence and heritage). The method used in this research was quantitative research method to calculate the value of wood, carbon, oxygen, and water absorption and qualitative research method to calculate the value of recreation, existence, and heritage. Results indicated that the economic value of recreation was the highest amounted to IDR 1,568,514,750.00 and the total economic value of TH2TI amounted to IDR 3,085,373,964.75. In the next 5 years, the economic value of TH2TI could reach IDR 3,664,456,405.74. The knowledge of the economic values of TH2TI is expected to make people aware to the importance of the environment for life.

Social Ecological Resilience System of Ambon Island Protected Forest, Maluku Province, Indonesia

Evelin Parera — 2024-05-05

Humans and nature cannot be separated because both have a close relationship as an ecosystem. The purpose of this study was to determine: 1) the level of social and ecological resilience; 2) Scenarios on ecological and social factors for the sustainability of protected forests. The research method uses survey methods and data analysis uses qualitative-verification analysis based on the results of the calculation of the resilience index and the phase of the socio-ecological system. The results showed that the level of social and economic resilience was partially or simultaneously at the level of resilience with their respective indexes: social: 0.6944); ecology: 0.8148 and socio-ecology 0.7460. The exploitation phase (growth) leads to the conservation phase. The results of the scene show that both of them are at a high level of resilience with a resilience index of 0.8889 (high resilience) and a reorganization phase. If this phase can be maintained with various management interventions according to its function, it will minimize the level of disturbance to the Mount Sirimau Protection Forest Group.

Growth rate and carbon storage capacity of mangroves along the Tambakrejo Coastal Zone

Muhammad Agung Triyudha Agustina — 2024-05-13

The existence of mangroves is essential as a mitigation agent of the impacts of climate change. Mangroves serve as abrasion protection and a carbon storage agent, reducing greenhouse gas emissions. This study aimed to examine growth rate and carbon storage of mangroves as a determination of a rehabilitation potential for abrasion-exposed degraded mangroves. This study used a quantitative approach. Data was collected in November 2021 at the Tambakrejo coast, located in the north coast of Semarang. The results showed that the highest growth rate occurred in the 5–6-year period with the diameter of 0.11 cm (about 0.04 inch)/month and in the 4–5-year period with the height of 3.54 cm (about 1.39 inch)/month. The regression analysis showed moderate level of relationship between diameter and height values. This was used to determine both height and diameter values. Among different tree age classes, the age class of 72 showed the highest storage capacity, reaching 45.6 kg CO2eq, with average annual addition of 7.5 kgCO2eq/year. This indicates biomass addition is positively related to the storage capacity. Thus, anything that can alter the mangrove tree biomass will affect its carbon storage capacity.

Modelling the habitat suitability of rattan (Calamus zollingeri) in Lore Lindu National Park, Central Sulawesi

Fadjri Maarif — 2024-05-31

Calamus zollingeri is a potential rattan species that is widely used by the community and is found in the Sulawesi region. As one of the potential non-timber forest products, habitat suitability modelling is needed to determine the distribution and prediction of C. zollingeri distribution in Lore Lindu National Park (LLNP), Central Sulawesi. This study used a species distribution modelling approach with the Maximum Entrophy method. C. zollingeri encounter data were obtained through data collected in the Lore Lindu Management Information System (SIMRELI) from 2019 to 2023. Environmental variables used in the modelling included NDVI, altitude, slope, land cover and distance from river. The modelling results show that 40% of the total LLNP area is highly suitable for C. zollingeri habitat, 20% of the total LLNP area is suitable for C. zollingeri habitat, and 40% of the total LLNP area is unsuitable/insufficient data. This study is important as a reference material for the management of LLNP, especially in structuring the management zone of LLNP.