Jurnal Penelitian Kehutanan Wallacea
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Prediction of Water Discharge and Sediment in Teak Forested Areausing Artificial Neural Network Model
Get PDFInformation on the relationship of rainfall with discharge and sediment are required in watershed management.This relationship is known to be highly nonlinear and complex. Although discharge and sediment has been monitored continuously, but sometimes the information is not or less complete. In this condition, modeling is indispensable. The research objective is to create a model to predict the monthly direct runoff and sediment using Artificial Neural Network (ANN).The model was tested using rainfall data at t-3 and t-4 as input, and discharge and sediment at t+3 and t+4 as output. The data used is the data from 2001 to 2014. The results showed that of some models tested there are two models for the prediction of discharge and two models for sediment.The model was chosen because it has the smallest MSE, the largest R2and satisfying K (0.5 to 0.65).Thus,these models can be used to predict discharge andsediment for a period of t+3 and t+4.Prediction of discharge of t+3 and t+4 may use Q t+3= 0,64 Q t-3+ 0,05 and Q t+4= 0,65 Q t-4+ 0,074 res pectively, while for predicting sediment of t+3 and t+4 may use equations QS t+3= 0,45 QS t-3+ 0,052 and QS t+4= 0,45 QS t-4+ 0,052. This ANN modeling can be applied to predict the flow and sediment in other locations with an architecture adapted to the conditions of available data
Pengaruh asal populasi dan pohon induk terhadap pertumbuhan bibit meranti tembaga (Shorea leprosula Miq.) sebagai materi untuk perbanyakan klonal
No full textVegetative propagation has an important role in production of high quality planting stocks.Through vegetative propagation, the genetic potential of a mother tree will totally be inherited to the off-springs.This study aimed to determine the effects of population sources and clones on growth variation of Shorea leprosulaMiqshoot cuttings. Randomized Complete Block Design (RCBD) was used as an experimental design; which consists of two factors, i.e population sources(Muara Wahau, Berau, Kenangan,Ketapangand Carita) and clones(40 clones). In this study clone was nested in the population. The results showed that the clones and population sourcesinfluenced the rooting percentage, height growth, number of root, length of root and number of leaves of S.leprosulashoot cuttings. Rooting percentage of clones ranged between 66.7 –100.0% (2 groups difference), height growth rangedbetween 2.60 –6.80 cm (6 groups difference), number of root rangedbetween 2.1 –5.7 (9 groups difference), length of root ranged between 4.3 –15.8 cm (8 groups difference) and number of leaves ranged between 1.17 –3.57 (5 groups difference)
Sifat Dasar dan Kegunaan Kayu Agathis (Agathis hamii M. Dr.) dari Sulawesi Selatan
Get PDFWood proper uses of tree species can be determined by it’s basic properties. This research was carried out to examine the basic properties (anatomical structure, chemical, physical and mechanical) of agathis (Agathis hamii M. Dr.) wood from natural forest in Sulawesi. Proper uses of wood was determined by considering their basic properties and uses which the local community have currently employed. Results revealed that agathis heartwood is whitenish to yellow brownish colour; fine texture; straigh grain; glossy; rather soft; moderate in specific gravity; moderate in dimensional shrinkage; strenght class III; high in cellulose and pentose content; low in lignin, extractive and ash content; remarkably long fiber and thin wall thickness; fiber grade is very good for pulp/paper manufacture. Appropirate uses of agathis are for light construction material in house building and certain ship components, furniture, handicraft and wood industry
Behavior and Group Movement of Proboscis Monkey’s (Nasalis larvatus Wurmb.Wurmb.) in Samboja, East Kalimantan
No full textProboscis monkey (Nasalis larvatus Wurmb.) are endemic primates to the island of Borneo that are subjected to serious problems like habitat loss, fragmentation and forest degradation. Studies of movement behavior of monkeys have been done in the isolated and fragmented habitat in Samboja, East Kalimantan. Behaviour data of feeding, moving, social, resting, and sleeping were collected using instantaneous sampling method. The plotsof trees survey were established 20 m x 200 m on each habitat. The movement behavior consists of daily ranging and utilization of height of the canopy. Daily ranging was recorded by GPS and height of canopy utilization divided to 0-3 m, 3.1-6 m, 6.1-9 m, 9.1-12 m, and > 12 m. The results showed that the daily ranging of the monkeys were varied, ranging from 25.7 m– 749.9 m (average 333 m), which home ranges between 4.52 ha – 6.92 ha. Daily movement distance between groups on the three habitat was different. Generally, the monkeys used canopy strata depending on habitat conditions, height, diameter and density of trees
Growth response of Shorea assamica Dyer seedlings to shading leveland growth inhibitor treatments
Get PDFShorea assamica Dyer is one of the forest trees with recalcitrant seed type, It can not be stored for long periods. Storage technique of planting material in the form of seedlings is one solution that can be done to overcome the problems of the seeds with a short shelf life. The aim of the research is to determine the growth response of S. assamica seedlings to shading andgrowth inhibitor treatments. Research design was approached by split plot design. The main plot was shade and sub plot was a growth inhibitor. The storage conditions consisted of (1) light (38,600 47,200 lux), (2) medium (19,342 35,300 lux) and (3) heavy shading (62 2,106 lux). The inhibitors used were (1) paclobutrazol 250 ppm , (2) NaCl 0.5% and (3) aquadest (as a control). The results showed that the combined treatment of paclubutrazol 250 ppm with heavy shade was able to suppress the growth of height, dry weight of root and seedling quality index of S. assamica at the age of 6 months optimally in nursery
The effect of method and germination paper substrate on viability of Eucalyptus pellita F. Mull seed
Get PDFImproper seed handling of Eucalyptus pellita will reduce seed quality, so as to improve the viability of the seed proper handling techniques are needed. To investigate the seed germination potency as a result of seed handling germination seed tests are needed. The purpose of this study was to examine the effect of germination method and paper substrate on the viability of E. pellita seeds. Seeds used in this study were from seedling seed orchard in South Sumatra, South Kalimantan, and Riau. Seed germination methods used in the laboratory tests were method of top paper and between paper tests, besides that, different papers were used such as: paper substrate namely straw paper, towel paper, filter paper, and newspaper. Factorial experimental design completely randomized was used. The results showed that: (1) the method of germination and paper substrate was significant (2) the best paper substrate and germination method was the method of top paper test with used media of newspaper (germination percentage 204 seedling /0.01 grams)
Bird responses to habitat change in the karst area of Bantimurung Bulusaraung National Park
Get PDFBirds are useful bioindicatorsto habitat changes. This study aims to determine the responses of birds to habitat change at Maros-Pangkep karst area, Bantimurung-Bulusaraung National Park. The research was carried out in three disturbance degrees (core-zone, wilderness-zone,and the community-gardens), which represents minimal, middle, and high interference level. A modifiedsquare-line method was used to observe vegetation of bird habitat. Point count method was used to observe bird population. Data of the bird habitat vegetation was analyzed using vegetation density. The difference of vegetation composition was analyzed using Sorensen-similarity index. Data of the bird was analyzed using abundance, and indexes of Shannon-Weinnerdiversity, Simpson dominance, Pielou evenness, and Margalef species richness. Significant differences between the numberof the individualbird weretested using one-way ANOVA, Tukey-Bonferroni test. The results showed that birds living in karst were sensitive to habitat changes. Birds responded through reducing the number of individuals and species, shifting the species of bird that has high importance value index from low tolerance species to high tolerance species. Birds also responded by shifting the feeding guild that has high important value index from frugivore to frugivore-insectivore and then to granivore, decreasing the number of bird species with large body size, reducing the number of bird species that need a special location to build nest. Considering that Maros-Pangkep Karst has vital roles, scientific values, and biodiversity richness, it is necessary to involve all stakeholders to maintain its sustainability, including the establishment of entire Maros-Pangkep Karst area as the karst-landscape area
Development Scenario of Collaborative Management at Bantimurung Bulusaraung National Park, South Sulawesi Province
Get PDFCollaborative management is the most appropriate strategy in an effort to accommodate the interests of local communities in the management of protected areas. Success of collaborative management is highly dependent on the extent of identification of key factors for strategy success to compile scenarios into operational recommendations. This study aimed to formulate a collaborative management strategy for Bantimurung Bulusaraung National Park (Babul NP) based on scenarios that may occur in the future. The study was conducted by observation, interviews and questionnaires to a number of expert informants and literature studies. Data was analyzed using a prospective analysis. The results showed that the development of collaboration in the future is an optimistic scenario with the increasing awareness of the interdependence of interests, improving human resource competencies, collaboration, the ability to build networks with other stakeholders, improving the ability to coordinate with relevant stakeholders and the ability to establish cooperation with them and the adequation of goverment policies to give a place to people in the utilization of the Babul NP. Application of collaborative development scenario is expected to improve Babul NP management
Roosting Selection by Red and Blue Lory (Eos histrio Muller, 1776) in Karakelang Island North Sulawesi
Get PDFThe Red and blue lory is an endemic parrot species from Talaud Islands, North Sulawesi. The use of existing resources is suspected that occurs of selection including the roosting trees. The research aims to identifying the characteristics of Red and Blue Lory roost tree and determining variables in its selection. We measured 14 variables to identify the characteristics and selection of roost tree. Mann-Whitney test, T-test, Chi-sqare test and Binary Logistic Regression were employed to analyze data. We detected 11 roost trees in study field, there are Gehe (Pometia coriacea Radkl) nine individual, Binsar (Ficus variegata) and Lawean (Sterculia sp) one individual. The Chi-square test identified five variables which related to roost tree selection, i.e; branch-free bole length, canopy diameter, canopy density and the number of trees around the roost tree on diameter 20 - 40 cm and > 41 cm. The Logistic regression analysis detected three variables that gave the most influence on roost tree selection, but branch-free bole length gave the most influence on roost tree selection
Keanekaragaman dan Penetapan “Umbrella Species” Satwa liar Di Taman Nasional Gunung Leuser
Get PDFThe determination of ‘umbrella species’ in the wildlife conservation implementation is very important to be effective and directed. This study was aimed to obtain information wildlife diversity (primates and terrestrial mammals) and ‘umbrella species’ on various type of habitats to support conservation programs in the Gunung Leuser National Park (GLNP), of Besitang Watershed, North Sumatera. The research was carried for six months, from May to October 2015. The observation was made using combination of variable circular plot and strip transect methods. Determination of \u27umbrella species\u27 is done through valuating by referring to the Department of Forestry criterias (2008). Primate were identified about 6 species and terrestrial mammal of 16 species. Primate and mammal diversity index are with the category of low to moderate with abudance index between 5.60-15.32. Based onassessment criteria and consideration to high conflict potential show that ‘umbrella species’ are elephant (Elephas maximus sumatranus Temminck, 1847). The wildlife conservation implications are recommended, such as to the elephants around GLNP, i.e to increase research wildlife distribution and population, habitat protection and population pockets, to develop a database and monitoring with geographic information systems (GIS), the minimization a hunting and law enforcement as well as mitigation wildlife conflicts, such as elephants and orangutans