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INDONESIA
Jurnal Biologi Tropis
Published by Universitas Mataram
ISSN : 14119587     EISSN : 25497863     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology
Jurnal Biologi Tropis (ISSN Cetak 1411-9587 dan ISSN Online 2549-7863) diterbitkan mulai tahun 2000 dengan frekuensi 2 kali setahun oleh Program Studi Pendidikan Biologi PMIPA FKIP Universitas Mataram, berisi hasil penelitian dan ulasan Ilmiah dalam bidang Biologi Sains.
Arjuna Subject : -
Articles 98 Documents
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Search results for , issue "Vol. 23 No. 4 (2023): October - December" : 98 Documents clear
Mapping Potential Carbon Content of Seagrass Species as Gas Regulation in Sekotong Waters, West Lombok Hendra Susana Putra; Agil Al Idrus; Rizal Umami
Jurnal Biologi Tropis Vol. 23 No. 4 (2023): October - December
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v23i1.4369

Abstract

Seagrass is one of the ecosystems that absorbs carbon through the process of photosynthesis which can be stored in the form of biomass in the leaves, rhizomes and roots. The content of heavy metal Hg in roots, rhizomes, and leaves of seagrass species has a negative correlation, namely the higher the heavy metal content, the lower the chlorophyll content, which can trigger climate change due to greenhouse gases. The aim of this study was to determine the potential carbon absorption capacity of seagrass species in Sekotong waters, West Lombok. The research method used _ is descriptive quantitative. Plant samples were collected using the Purposive Random Sampling method. Analysis of the carbon content in samples of seagrass species can be identified through C-organic analysis conducted in the laboratory using the Walkley and Black method. The results of the study found that the average Hg and carbon content of seagrass species in seagrass beds were Station 1: (Hg: 0.31, Carbon: 63%), Station 2: (Hg: 0.45, Carbon: 50%) and Station 3: (Hg :0.35%, Carbon:55%). so that it can be concluded that the carbon content in seagrass species decreases with the level of involvement of mercury in seagrass species. The research results are expected to be used as a source of information related to carbon absorption by seagrasses in Sekantung waters, West Lombok so that they can be taken into consideration for the management of water areas, especially the waters of Waring Sekotong, West Lombok.
Isolation of Phosphate Solubilizing Bacteria Around Bamboo (Bambusa vulgaris) Clumps Using Natural Media Trap Method Parisya Velayati Furqon; Bambang Fajar Suryadi; Ernin Hidayati
Jurnal Biologi Tropis Vol. 23 No. 4 (2023): October - December
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v23i4.5074

Abstract

Bamboo plant is a potential source of plant growth promoting bacteria (PGPB). Phosphate solubilizing ability is an important characteristic of PGPB. This study aims to isolate phosphate solubilizing bacteria around the bamboo clumps using natural media. The bacteria around the bamboo clumps are trapped using natural media. The media consist of  70 gram cooked rice and 70 gram banana peel. The media were stored in plastic boxes with four types of treatments: 1) tightly closed, 2) covered with tissue, 3) covered with banana leaves, and 4) uncovered (open). Those plastic boxes are placed around the bamboo clump and left  for up to 5 days. The trapped phosphate solubilizing bacteria were isolated using Pikovskaya agar. A total of 17 isolates of phosphate solubilizing bacteria were successfully trapped, 8 isolates in cooked rice and 9 isolates in banana peel. The isolates showed a phosphate solubilization index, ranging from 0,2 to 1,40. The isolate NN01 has the highest ability to solubilize phosphate. This isolate was trapped in a cooked rice with an open plastic box condition. NN01 is a Gram positive rod-shaped bacterium. In this study it was revealed that the area of ​​the bamboo clumps is inhabited by various types of bacteria. The natural media of cooked rice and banana peels have a good ability to trap potential phosphate solubilizing bacteria around the bamboo clumps.
Diversity of Molluscs Associated with Mangroves on The Gerupuk Beach in Central Lombok in 2023 Jennifer Isabelana Dasilva; Abdul Syukur; Mahrus Mahrus
Jurnal Biologi Tropis Vol. 23 No. 4 (2023): October - December
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v23i3.5425

Abstract

Mangrove ecosystems have an important role in coastal areas. One of the roles of mangroves is to protect the shoreline and prevent seawater intrusion. Molluscs are one of the mangrove association biota whose lives are influenced by the presence of mangrove forests. Therefore, the purpose of this study was to determine the diversity of molluscs and the relationship between mangrove density and limiting molluscs to the coastal mangrove area of ​​Gerupuk Beach, Central Lombok. Sampling of molluscs used the quadrate sampling method with purposive sampling by taking into account the mangrove species found in the observation plots. The data obtained were then analyzed with the charisma index, associations, and Pearson's correlation coefficient. The results of this study obtained 13 species of Molluscs consisting of 12 species of the Gastropod family and 1 species of the Bivalvia family. The Brachyura diversity index at the research station was moderate with a value between 1.48–1.88. Furthermore, there were 8 species of Molluscs associated with 4 species of mangrove from 13 species of Molluscs found. The linear regression equation y = 0.1429x + 0.0007 with a Pearson correlation coefficient (r) of 0.57 indicates a strong relationship between the independent variable (x) mangrove density and the dependent variable (y) exposure to molluscs. The conclusion of this study is that the diversity of molluscs in the mangrove area of ​​Gerupuk Beach is included in the moderate category and there is a significant relationship between mangrove density and mollusk attractions.
The Structure of Mangrove Community in The Waters of Pare Mas Jerowaru East Lombok Nindi Hamida Lutfiani; Agil Al Idrus; Didik Santoso
Jurnal Biologi Tropis Vol. 23 No. 4 (2023): October - December
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v23i4.5624

Abstract

Mangrove communities grow well in the tropics and are able to adapt to extreme environments, such as: high temperature, high salinity, extreme tides, high sedimentation, and oxygen-poor growing substrate conditions. Information about mangrove ecology is very important to provide an overview of the current condition of mangroves. The aim of this research is to determine the structure of the mangrove community in Pare Mas Jerowaru, East Lombok. This research used a purposive sampling method and a combination of line and quadrat transects. The research results obtained 3 types of mangroves in Pare Mas waters. The diversity index value is in the low category and the dominance index value is medium to high. The species Rhizophora apiculata had the highest frequency value (0.57 ind/m²) and the lowest was Avicennia marina (0.10 ind/m²). Density at the tree level is in the sparse category, while at the pole, sapling and seedling level it is in the medium to very dense category. The types of mangroves that have the highest cover values in the tree, pole and stake categories are Sonneratia alba and Rhizophora apiculata. The highest INP values in the categories of trees, poles, saplings and seedlings were 272.99% (Sonneratia alba), 173.58% (Sonneratia alba), 215.51% (Rhizophora apiculata) and 200.00% (Rhizophora apiculata).
Probiotic Antibacterial Activity Test Of Bali Salak Fruit (Salacca zalacca var Amboinensis) Against Staphylococcus aureus Istri Mas Padmiswari Anak Agung; Nadya Treesna Wulansari
Jurnal Biologi Tropis Vol. 23 No. 4 (2023): October - December
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v23i4.4503

Abstract

One of the sources of natural antioxidants comes from salak fruit (Salacca zalacca). Indonesia has various varieties of salak fruit such as pondoh salak, manggala salak, granulated sugar and balinese salak. Bali salak is one of the local Balinese salak varieties. This study aims to determine the probiotic antibacterial activity test of Balinese salak fruit juice against Staphylococcus aureus. The method used in this study was Completely Randomized (CRD) in laboratory scale experiments (in vitro). Laboratory-scale in vitro research was carried out at the ITEKES Bali Food Engineering and Processing Laboratory and the Agricultural Technology Laboratory at Udayana University which will be carried out between August 2021 and October 2021. Testing for antibacterial activity uses the well diffusion method. NA media containing Staphylococcus aureus isolates. Data analysis used analysis of variance (ANOVA). The results of the study found that Staphylococcus aureus bacteria could be prevented by using a probiotic drink, zalacca juice.
Effect of Rote Tortoise Habitat on Morphology and Anatomical Systems of the Body and Government Efforts to Overcome Extinction Resti Nopriyanti; Jennie Agatherania Listira; Dominica Feni Valentina; Wahyu Irawati
Jurnal Biologi Tropis Vol. 23 No. 4 (2023): October - December
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v23i4.5127

Abstract

The Rote turtle with the scientific name Chelodina mccordi is an endemic animal from Rote Island, East Nusa Tenggara. The Rote turtle is unique in its long neck and snake-like head. Rote turtles are rarely found in their natural habitat because many are hunted to be traded by collectors of endemic reptiles. The purpose of this study was to determine the effect of the habitat and behavior of the rote tortoise on its morphology and body mechanisms. The method used to compile this paper is to use literature reviews and literature studies from various sources to discuss 5 topics of study, namely: Rote Turtle Habitat, Rote Turtle Morphology, Blood Circulation System, Rote Turtle Respiratory System, Osmoregulation and Excretion of the Rote Turtle, and Uniqueness and Management of the Rote Turtle. Based on the results obtained, the habitat of the Rote turtle greatly influences the morphology and mechanisms of blood, respiration, osmoregulation, and excretion of the Rote turtle. The habitat for tortoise rote is the appropriate physical environment. Low rainfall of around 800-1200 mm/year and swamp grass with a height of about 2-3 meters. Potential predators for food and hunting have caused the Rote tortoise to become rare and rarely found in its natural habitat. The NTT government has designated three natural habitat lakes are natural habitats and the Governor of NTT Decree Number: 204/KEP/HK/2019 made the rote turtle habitat for the rote turtle Essential Ecosystem Area.
Diversity of Seagrass Species in The Conservation Area of The Sawu Sea Marine National Park (TNP) Lambok Laurence Silaban; Fakhrurrozi Fakhrurrozi; Juraij Juraij; M Rizki Fauzi; Chandrika Eka Larasati; Ibadur Rahman
Jurnal Biologi Tropis Vol. 23 No. 4 (2023): October - December
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v23i4.5268

Abstract

The Sawu Sea is an important habitat for dolphins, dugongs, manta rays and turtles. Sabu Island is one of the locations included in the Sawu Marine National Park area with considerable seagrass potential. The purpose of this study was to determine the health condition and community structure of seagrass on Sabu Island. This study used line transect, square transect, and random transect methods. The results of observations found 8 species, the most common types of seagrass were Thalassia hemprichii, Cymodocea rotundata, Halodule uninervis, Halophila ovalis, and Syringodium isoetifolium. A type of seagrass that is rarely found is Cymodocea serrulate which is only found in Loborai. The highest species density at Bodae station is Halodule unservices, and the lowest at Bodae station is Enhalus acoroides. The diversity index of seagrass species at the three stations is included in the low species diversity category. Seagrass species uniformity index is included in the medium community category. The dominance index of seagrass species at 3 stations is in the low dominance category. The highest coverage was Halodule uninervis with a value of 42.74% and the lowest was Enhalus acoroides with a value of 0.69%. The extent of seagrass cover at each of the Bodae, Laborai, and Keliha locations is 69.09%, 62%, and 66%, respectively. The highest Importance Value Index was found in Halodule uniservis, namely 138.00%, 30.55%, 96.80%, and the lowest was in Cymodocea serrulate. Overall the health condition of the seagrass beds at the observation location is included in the healthy category.
The Potential of Hot Water Mudiak Sapan Thermophilic Bactery Consortium Formulation in Producing Xylanase Enzyme Irdawati; Indrawani Matondang; Linda Advinda; Azwir Anhar; Yusrizal Y
Jurnal Biologi Tropis Vol. 23 No. 4 (2023): October - December
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v23i4.5309

Abstract

The xylanase enzyme has high commercial value in the industrial sector, including the food industry, animal feed, bleaching of pulp/pulp, lignocellulosic bioconversion as fuel, and in the food industry, namely the cheese, bread and meat industries, while in the non-food industry this can be used in detergents. Xylanase enzymes can be produced from microorganisms, one of which is thermophilic bacteria. Thermophilic bacteria are known to be able to produce thermostable enzymes and proteins that are heat resistant. Xylanase production in compatible bacterial consortia was higher than monoculture. The purpose of this study was to determine the bicultur consortium that has the potential to produce xylanase enzymes. This research is an experimental research. Enzyme activity testing used the Miller method with DNS (Dinitrosalycilic acid) reagent using a completely randomized design (CRD) with 3 repetitions. Data on the results of xylanase activity were analyzed by ANOVA test and DMRT follow-up test with a 5% significance level.The results of the thermophilic bacterial isolates in the consortium that have the potential to produce xylanase enzymes are MS18 & MSS15,  MSS15, MS16 and MS18 & MS16.
Identification of Lactic Acid Bacteria From Pandan Civet Feces (P. hermaphroditus) in West Kalimantan Based on Phenotypic Similarity Ageresya Ester Evelin Br Sibarani; Rahmawati Rahmawati; Firman Saputra
Jurnal Biologi Tropis Vol. 23 No. 4 (2023): October - December
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v23i4.5314

Abstract

Lactic acid bacteria are included in the gram positive bacteria that are widely distributed in the digestive tract of living things, such as in the feces of the Pandan Luwak (P. hermaphroditus) and important role in improving the microbial balance in the body. The purpose of this study was to obtain phenotypic characters, types of bacteria and similarity relationship between lactic acid bacteria from feces of Pandan Civet (P. hermaphroditus) in West Kalimantan and lactic acid bacteria in the identification book Bergey's manual of determinative bacteriology. This research was conducted by the method of isolation and screening bacteria using MRSA media supplemented with CaCO3 1%. Characterization of lactic acid bacteria based on morphological, biochemical, and physiological characters in Bergey's Manual of Determination Bacteriology. The results of the analysis using the MVSP (Multivariant Statistic Package) program with SSM coefficients and the UPGMA method obtained 44 bacterial isolates  thought to belong to two genera, namely the genus Lactobacillus and Bifidobacterium with three species, namely L. casei, L. brevis and B. bifidum. The results of the analysis showed that 12 bacterial isolates had a similarity index of 87,6% to L. casei, 17 bacterial isolates had a similarity index of 92,2% to B. bifidum and 15 bacterial isolates had a similarity index of 84,5% to L. brevis.
Identification of Lactic Acid Bacteria from Fermented Kimchi Sawi Ansabi (Brassica juncea L.) using Phenotypic Similarities Selly Marselina Teul; Rahmawati Rahmawati; Siti Ifadatin
Jurnal Biologi Tropis Vol. 23 No. 4 (2023): October - December
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v23i4.5315

Abstract

Latic acid bacteria play a significant role in the fermentation of food, such as kimchi, which is fermented vegetables. Sawi kampung ansabi is a vegetable cultivated by the Dayak people in Kalimantan during the rice farming season which can be fermented into kimchi. Based on phenotypic similaities, the aim of this study was to identify and acquire cultures of lactic acid bacteria on MRSA media (De Man Rogosa and Sharpe Agar) enriched 1% CaCO3 from kimchi sawi ansabi fermented food sawi ansabi. The results of the isolations were used to test 10 isolates of lactic acid bacteria using the MVSP (Multivariate Statistical Package) program, the UPGMA (Unweighted Pair Group Method with Arithmetic Average Mean) method based on the Simple Matching Coefficient and Jaccard Coefficient to form dendrograms. Simple Matching Coefficient analysis resulted 8 isolates suspected to be Lactobacillus plantarum with a similarity index of 94.6%, 1 suspected 91.9% to Lactobacillus dellbrueckii, and 1 suspected 91.9% to Pediococcus cerevisiae. The Jaccard Coefficient analysis resulted in 8 isolates suspected of Lactobacillus plantarum with a similarity index of 92.6%, 1 isolate suspected 87% to Lactobacillus dellbrueckii, and 1 isolate 88% to Pediococcus cerevisiae.

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