Abstract
To switch the origins of wood resources from natural to planted forests, evaluation of wood from planted trees is essential. The objective of this study is to provide the relevant wood properties promoting the utilization of wood from planted trees in the tropics. Growth characteristics (stem diameter at 1.3 m above the ground and tree height) and stress-wave velocity of stems were measured for two six-year-old red meranti species, Rubroshorea leprosula and
Abstract
Pinus merkusii shows great potential as a resin-producing wood in Indonesia, with the global demand for pine resin reaching 1 million tons annually. This study investigated the effect of ethephon on the anatomical properties of P. merkusii, particularly the resin duct that affects resin productivity, to increase the efficiency of pine resin tapping. Ethephon was mixed with Vaseline to create concentrations of 0%, 2%, 4%, and 8% and then applied to the seedlings
Abstract
Understanding drought propagation is essential for effective water resource management. This study employs an innovative approach to examine the transition from meteorological drought (MD) to hydrological drought (HD) in the Upper Nan Watershed (UNW), Thailand, using the standardized precipitation evapotranspiration index (SPEI) and standardized streamflow index (SSI). Cross-wavelet transform (XWT) and Pearson’s correlation analyses reveal a significant positive
Abstract
This study examines four regression models to estimate tree-level above-ground carbon stock (AGC) in the clonal teak plantations of Wanagama Forest, Indonesia using a data fusion of UAV-LiDAR and RGB aerial imagery. Data collected in the field were diameter at breast height and tree height. Vegetation indices were derived from the visible bands of a georeferenced orthomosaic captured by DJI Mavic 2 Pro. The LiDAR data was obtained using GeoSun GS-100M device
Abstract
We explore the impact of teaching methods and learning styles on student engagement in a conservation education program focused on primate conservation in Indonesia. Engaging students is essential for fostering environmental literacy and encouraging pro-environmental behaviours. We assessed the effectiveness of active versus didactic teaching methods and visual, auditory, and kinaesthetic learning styles in enhancing engagement. Using a formative assessment
Abstract
The tropical rainforest of Kalimantan, Indonesia, is dominated by a mixed dipterocarp forest. Rubroshorea johorensis is a commercial species of the Dipterocarpaceae family but is listed as vulnerable. So far, the management of natural forests through selective logging may have a negative impact on genetic diversity. Therefore, this study was conducted to determine the genetic diversity of R. johorensis in different forest types representing the management and
Abstract
Tribal leaders in Papua had been positioned as both cultural symbols and real decision-making leaders, but they have lost their power over natural resource management and forests. Using the case of nutmeg management by the tribal Baham-Matta community, we present changes in the power constellations within the local social structures, in which the Kings (Patuans), the highest tribal leaders, have increasingly been unable to rule their people. In this research,
Abstract
The wide areas of critical land in Indonesia are attracting a high level of attention due to the significant influence of global warming. Addressing this issue requires several priority efforts, such as critical land rehabilitation programs. The level of critical land rehabilitation can be evaluated with remote sensing technology. Therefore, this research aimed to assess critical land in South Sulawesi rehabilitated by PT Vale Indonesia Tbk (PT VI) as compensation
Abstract
The prevalence of bulbuls in the Indonesian cage bird trade raises concerns about its impact on their distributions and, consequently, the ecological balance. This study delves into the trade dynamics of bulbuls, examining their market prevalence and its correlation with their abundance in the wild and their suitable habitats. We conducted bird market surveys across Java, supplemented by online trade surveys to ascertain market prevalence. Concurrently, we
Abstract
Hipposideros spp. are insectivorous bats and karst cave dwellers. This study aimed to study the roosting ecology, reproduction, and population fluctuations of three species H. diadema, H. larvatus, and H. ater in Gunung Sewu Karst region, Indonesia. Age and reproductive status of individuals were identified and analyzed using a combination of forearm length (FA) and body mass grades (W). Multiple regression analysis was used to determine the correlation between
