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BIOTROPIA - The Southeast Asian Journal of Tropical Biology
Published by Southeast Asian Regional Centre for Tropical Biology
ISSN : 02156334     EISSN : 1907770X     DOI : http://dx.doi.org/10.11598/btb
Core Subject : Health, Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology Veterinary
BIOTROPIA, The Southeast Asian Journal of Tropical Biology, is a scientific publication of the Southeast Asian Ministers of Education Organization (SEAMEO) – Southeast Asian Regional Center for Tropical Biology (BIOTROP). It publishes articles in the broad areas of tropical ecosystems and environmental impacts, biodiversity conservation and sustainable development and biotechnology.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 8 Documents
 1 
Search results for , issue "Vol. 23 No. 1 (2016): BIOTROPIA Vol. 23 No. 1 June 2016" : 8 Documents clear
Diversity of Actinomycetes From Eka Karya Botanical Garden, Bali Ratnakomala, Shanti; Lisdiyanti, Puspita; Prayitno, Nita Rosalinda; Triana, Evi; Lestari, Yulin; Hastuti, Ratih Dwi; Widyastuti, Yantyati; Otoguro, Misa; Ando, Katsuhiko; Sukara, Endang
BIOTROPIA Vol. 23 No. 1 (2016): BIOTROPIA Vol. 23 No. 1 June 2016
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (342.4 KB) | DOI: 10.11598/btb.2016.23.1.504

Abstract

A total of 29 actinomycetes strains were isolated and identified by full sequence analysis of the 16S rRNA gene. Samples were collected from Bali Island, Indonesia, including 18 soil and 20 leaf litter samples from Eka Karya Botanical Garden. Two isolation methods were used in this study: SDS-extract (SY) and Rehydration-Centrifugation (RC). Based on 16S rRNA gene analysis, the isolated actinomycetes were grouped into two genera. Molecular analysis of 16S rRNA gene similarities showed that the actinomycetes isolated from Eka Karya Botanical Garden were of diverse origin. Analysis of soil samples resulted in 144 isolates belonging to 24 genera and more than 87 species, with Streptomyces being the dominant genus. This was followed by Actinoplanes (25 isolates, 17%). From leaf litter samples, 85 isolates were obtained, belonging to 9 genera and more than 41 species. The most dominant genus was Catenuloplanes (42 isolates, 49%), followed by Actinoplanes (16 isolates, 19%).
Intraspecific Variation on Early Growth of Neolamarckia cadamba Miq. in Provenance-Progeny Tests in West Java Province, Indonesia Sudrajat, Dede J; Nurhasybi, Nurhasybi; Siregar, Iskandar Z; Siregar, Ulfah J; Mansur, Irdika; Khumaida, Nurul
BIOTROPIA Vol. 23 No. 1 (2016): BIOTROPIA Vol. 23 No. 1 June 2016
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1301.149 KB) | DOI: 10.11598/btb.2016.23.1.439

Abstract

Genetic parameters for early growth of Neolamarckia cadamba, an indigenous species with potential as a source of timber wood, were estimated in open-pollinated provenance–progeny tests conducted at two sites in West Java Province, Indonesia. The experiment was arranged in a randomized complete block design with 12 provenances, 105 families, and five replications in four-tree row plots. Total height and root collar diameter were measured at 18 months of age. Significant differences among provenances and among families within provenances were observed for height and collar diameter at all sites, except for collar diameter among provenances at the Parungpanjang site. In general, the Garut (GSJ) provenance performed better than the Kualakencana (KKP) and Nusa Kambangan (NKJ) provenances at both sites. Evaluation of variance components at the two sites showed that the provenance effects (ranging from 0.5 to 1.7%) contributed more to the total variance than family-within-provenance effects (ranging from 0.4 to 0.6%). Genetic correlations between height and collar diameter were weak to moderate. Heritability estimates were low for all traits at Limbangan, whereas they were moderate at Parungpanjang. Estimated genetic gain for height and diameter based on proportional family selection of 0.30 was 0.13 and 0.18 at Limbangan, and 0.31 and 0.16 at Parungpanjang, respectively. Continued heritability measurement is required to obtain stable values. Stable heritability combined with family selection and within-family selection will improve genetic gain.
Antibreast Cancer Activity of Nanopropolis Indonesia on Induced Mammary Gland Tumor by DMBA in Virgin Sprague-Dawley Rats Hasan, Akhmad Endang Zainal; Mangunwidjaja, Djumali; Sunarti, Titi Candra; Suparno, Ono; Setiyono, Agus
BIOTROPIA Vol. 23 No. 1 (2016): BIOTROPIA Vol. 23 No. 1 June 2016
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (613.285 KB) | DOI: 10.11598/btb.2016.23.1.473

Abstract

The objective of this study was to determine the effect of nanopropolis on DMBA-induced mammary tumors in rats. After the first tumor appearance, twenty-eight rats were divided into seven groups. Groups 1, 2, and 3 served as recipients of nanopropolis treatments at dosages of 8, 32, and 56 μg/mL, respectively. Group 4 received propolis at 233 μg/mL, Group 5 served as the treatment control, Group 6 received DMBA only, and Group 7 served as the normal control. The effects of nanopropolis at 32 μg/mL and propolis at 233 μg/mL were similar in reducing tumor size, healing wounds caused by the tumor, and eliminating cancer cells. Furthermore, the study suggested a relationship between particle size of the absorbent material and its effectiveness. Overall, nanopropolis was very effective in treating mammary gland tumors and breast cancer even at small concentrations.
Abiotic Factors Influencing Mantangan (Merremia peltata) Invasion in Bukit Barisan Selatan National Park Master, Jani; Tjitrosoedirdjo, Soekisman; Qayim, Ibnul
BIOTROPIA Vol. 23 No. 1 (2016): BIOTROPIA Vol. 23 No. 1 June 2016
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (311.21 KB) | DOI: 10.11598/btb.2016.23.1.457

Abstract

Some areas in Bukit Barisan Selatan National Park have serious environmental problems related to the invasion of Merremia peltata (Family: Convolvulaceae). This study investigated abiotic factors influencing the invasion. The research compared abiotic conditions in three forest locations with different invasion levels: severe, moderate, and mild. Measured abiotic factors included percentage of tree canopy cover, microclimate variables (temperature and humidity), elevation above sea level, and the physical and chemical properties of the soil surface. In this study, canopy cover was categorized as an abiotic factor because it affects the amount of light reaching the forest floor. A post-hoc Duncan's Multiple Range Test (DMRT) was performed to determine significant differences (p < 0.05) among abiotic variables. Additionally, correlation analysis and multiple linear regression were conducted to evaluate the relationships between abiotic factors and the level of M. peltata invasion. Multiple regression analysis showed that canopy cover significantly (p < 0.05) affected the invasion. Based on the generated model, a 1% increase in canopy cover would decrease the M. peltata invasion by approximately 2.8%. Soil nutrient analysis through multiple linear regression revealed that the C/N ratio, and concentrations of P₂O₅, Ca, Mg, and Na significantly (p < 0.05) influenced invasion level. An increase in C/N ratio and concentrations of P₂O₅ and Ca were correlated with a reduction in invasion, whereas increases in Mg and Na concentrations were associated with higher invasion levels. Overall, the invasion of Merremia peltata in Bukit Barisan Selatan National Park was influenced by an open forest canopy and was associated with high concentrations of Na and Mg in the soil of invaded areas.
Potential of Mangrove Seedlings for Utilization in the Maintenance of Environmental Quality Within Silvofishery Ponds Hastuti, Endah Dwi; Budihastuti, Rini
BIOTROPIA Vol. 23 No. 1 (2016): BIOTROPIA Vol. 23 No. 1 June 2016
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (136.248 KB) | DOI: 10.11598/btb.2016.23.1.606

Abstract

Silvofishery system has been applied to aquaculture activities and it has been developed in the coastal area of Semarang City, Indonesia. However, information on the initial development of silvofishery ponds concerning the functionality of mangrove seedlings on environmental quality of fish ponds had not been studied. This experiment aimed to determine the environmental conditions of silvofishery ponds and to analyze the effect of seedling stands of mangrove on environmental quality control. The presence of mangrove seedlings caused the decrease of temperature and the increase of salinity. ANOVA showed that mangrove species significantly affected water salinity, while canal width and mangrove species significantly affected turbidity and pH. Regression analysis showed that the height of Rhizophora mucronata had partially significant effect on Total Suspended Solids (TSS), Organic Matter (OM), as well as Nitrogen (N) and Phosphorus (P) concentrations. Diameter of R. mucronata affected temperature. The height and diameter of Avicennia marina affected Dissolved Oxygen (DO). Mixed populations of A. marina and R. mucronata had an effect on water turbidity, while population of only A. marina had a partial effect on water salinity. R. mucronata seedlings had dominant effect on the environmental quality. Mangrove seedlings can be used as environmental quality control within silvofishery ponds to maintain optimal conditions for fish growth. The application of silvofishery in early stage of mangrove seedlings should consider the more abundant plantation of R. mucronata compared to A. marina.
Ichtyofauna at Cijalu River, Cilacap Regency Central Java Province, Indonesia Nuryanto, Agus; Bhagawati, Dian; Abulias, M Nadjmi; Indarmawan, Indarmawan
BIOTROPIA Vol. 23 No. 1 (2016): BIOTROPIA Vol. 23 No. 1 June 2016
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2016.23.1.362

Abstract

Cijalu River is located in the western part of Cilacap Regency, Central Java Province. The river flows through forestry, housing, and farming areas. These conditions lead to the prediction that its physico-chemical characteristics may have been altered, potentially affecting the fish species inhabiting the river. This study aimed to collect data on fish species inhabiting the Cijalu River and analyze their distribution. A survey method was conducted using a clustered random sampling technique. The river was divided into three sections: upstream, midstream, and downstream. Species diversity was measured based on the number of species recorded, while distribution was determined by the presence of fish species in each sampling site. Nineteen fish species belonging to ten families were identified from the Cijalu River. The ten families recorded were Anabantidae, Bagridae, Balitoridae, Channidae, Cichlidae, Cyprinidae, Loricariidae, Osphronemidae, Poecilidae, and Sisoridae. Cyprinidae represented the family with the highest number of species (6 species), followed by Channidae (3 species), Bagridae (2 species), and Osphronemidae (2 species). The remaining families were each represented by one species. Different patterns of fish distribution were observed during the study. Glyptothorax platypogon and Channa gachua were found only in the upstream area, while Anabas testudineus was collected only from the downstream section. Other species were found either from the midstream to downstream areas or throughout the entire river system. The variation in species distribution may be associated with changes in physico-chemical characteristics from upstream to downstream, particularly substrate type and water velocity.
Potential Yield of Acid-Adaptive Soybean Promising Lines in Ultisols of Tanah Laut Regency, South Kalimantan Province, Indonesia Kuswantoro, Heru
BIOTROPIA Vol. 23 No. 1 (2016): BIOTROPIA Vol. 23 No. 1 June 2016
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2016.23.1.561

Abstract

Soybean is an important food commodity after rice and corn in Indonesia. Until now soybean demand cannot be fulfilled by domestic production, although the chances of fulfillment can be attempted. One of the attempts to increase domestic production is soybean planting in acid dry land that is widely available in Indonesia. The research aimed to obtain soybean lines that are adaptive in acid dry land. A total of 10 soybean promising lines and two check varieties (Wilis and Tanggamus) were grown in acid dry land in Tanah Laut Regency, South Kalimantan Province, Indonesia. Experimental design used was randomized complete block design with four replications. The data were analyzed using analysis of variance and followed by Least Significant Different test. The results showed that the promising lines of SC5P2P3.5.4.1-5 and SC5P2P3.23.4.1-5 achieved production of 1.51 t/ha and 1.48 t/ha, respectively. These yields were higher than Wilis and Tanggamus varieties that reached 1.41 t/ha and 1.13 t/ha, respectively. These two promising lines had the potency to be developed in Tanah Laut Regency, South Kalimantan or other areaswith similar soil characteristics.
Cellulase Production by Bacillus subtilis M1 Using Pretreated Groundnut Shell Based Liquid State Fermentation Vyas, Ashish Kr; Putatunda, Chayanika; Singh, Joginder; Vyas, Deepak
BIOTROPIA Vol. 23 No. 1 (2016): BIOTROPIA Vol. 23 No. 1 June 2016
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2016.23.1.472

Abstract

Groundnut shell, which is rich in natural cellulose, was assessed as a substrate for the production of cellulase enzyme by cellulolytic bacteria. In the present investigation, the bacterial isolate M1 was found to be capable of producing high amounts of endoglucanase and exoglucanase on alkali-treated groundnut shell. The effects of various nitrogen sources, amino acids, and Ca²⁺ ions in the medium containing pretreated groundnut shell were also evaluated. It was observed that a 2% substrate concentration and 1 mM calcium concentration were optimal for cellulase production. Among the nitrogen sources tested, ammonium nitrate was found to be the most effective. Asparagine, tryptophan, and methionine were found to stimulate cellulase activity.

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