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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 2,520 Documents
 171   172   173   174   175 
Structure and Composition of Urban Forest Stands of Pulau Bungin, Teluk Kuantan City, Kuantan Singingi District Pebriandi, Pebriandi; Suhardianto, Suhardianto; Yoza, Defri
Jurnal Biologi Tropis Vol. 25 No. 1 (2025): Januari - Maret
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.v25i1.8434

Abstract

The existence of urban forests should be referred to as a place to preserve the environment, seeing from the start of the density of settlements that cause less and less space as a place to preserve the environment. The Bungin Island City Forest area in Koto Teluk Kuantan Village is one of the potential tourist destination objects to be offered when tourists visit Jalur City. The aim of this research was to examine the structure and composition of the stands in the Bungin Island City Forest, located in Kuantan Singingi Regency. The research method used systematic sampling method by collecting data directly at the research location. Variables observed were the number of individuals, diameter and height of trees. Vegetation data collection was carried out using the creation of a square plot unit measuring 20 m x 20 m with the determination of the plot location using systematic sampling with random start, namely taking sample plots systematically and randomly started. The data that has been obtained is analyzed descriptively quantitative which is done to obtain a clear picture of the state of the urban forest. The results of the study obtained 23 plant species in the urban forest of Bungin Island with the highest importance value index (INP) is duku plant with a value of 47,10 at the tree level, which means that this plant is the dominant species in the urban forest of Bungin Island. The conclusion of this study shows that the urban forest of Bungin Island is composed of 23 species grouped in 20 families and the composition of the stand is composed of 228 plants with the highest canopy statification in stratum C (subcanopy) followed by stratum B (canopy), stratum D (understory) and stratum A (emergent).
Effect of Teki Grass Extract (Cyperus rotundus) on the Growth of Green Beans (Vigna radiata) and Red Spinach (Amaranthus dubius) Monica, Della Trya; Tazri, Mufidah Insani; Oktaviani, Mutia; Wulandari, Tesya; Azwir Anhar; Violita, Violita
Jurnal Biologi Tropis Vol. 25 No. 1 (2025): Januari - Maret
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.v25i1.8452

Abstract

Weeds are plants that humans try to manage because they inhibit the growth of cultivated plants or are harmful to human interests. This study aims to evaluate the effect of teki grass extract (Cyperus rotundus) on the growth of green beans (Vigna radiata) and red spinach (Amaranthus dubius). The research method used a completely randomized design (CRD) with two extract concentration treatments (30% and 50%) applied to both plants. The results showed that treatment with teki extract significantly affected plant growth, with a decrease in height and fresh weight at higher concentrations. The allelopathic effect of the teki extract inhibited the vegetative growth of mung beans and red spinach, indicating that this extract has potential as a bioherbicide agent.
The Difference in Fermentation Duration of Plant-Based Feed Using EM4 on the Feed Quality Manganang, Yessi A. P.; Ulaan, Magdalin; Mose, Numisye I.
Jurnal Biologi Tropis Vol. 25 No. 1 (2025): Januari - Maret
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.v25i1.8455

Abstract

EM-4 probiotic solution is used in a fermentation process to lower the crude fiber in lemna cake and raise the protein content of the raw materials. The research aims to determine the difference in fermentation duration of plant-based feed using EM-4 solution on the improvement of quality and nutritional value of Nile tilapia feed.  The object of the research is artificial feed with 30% protein composed of various vegetable ingredients which is then fermented according to the research design. The study was consisting of 4 treatments: A: 1-day fermentation, B: 3-day fermentation, C: 5-day fermentation, D: 7-day fermentation. Data collection involved chemical and physical testing of the feed. The results of this research showed that the longer the fermentation, the protein content becomes higher while the carbohydrate and crude fiber content decreases. Therefore, the physical tests of the feed included buoyancy, water stability, and feed hardness shows no difference in each treatment. Seven days fermentation shows the best values on nutritional values. The combination of EM-4 with artificial feed made from vegetable ingredients can be recommended as fish feed because it fulfills protein nutritional needs to increase fish growth and development.
DPPH Radical Capture Test of Sumbawa Oil and Identification of Compound Content Using GC-MS Wardani, Ray Haerul; Permatasari, Lina; Hidayati, Agriana Rosmalina; Hanifa, Nisa Isneni
Jurnal Biologi Tropis Vol. 25 No. 1 (2025): Januari - Maret
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.v25i1.8468

Abstract

Free radicals are reactive fragments that can trigger a variety of chronic diseases. Antioxidant compounds are needed to counteract the attack of free radicals. Sumbawa oil is one of the natural traditional remedies that has the potential to be a natural antioxidant because it contains compounds such as lauric acid, palmitic acid, linoleic acid, stearic acid, and methyl palmitate. The study aimed to determine the metabolite compounds contained in the Sumbawa oil brand “Rimba” and their activity to capture the DPPH free radical. The Sumbawa oil determined their metabolite compounds using Gass Chromatography-Mass Spectrometry (GC-MS). The antioxidant activity of Sumbawa oil was analyzed using the DPPH radical capture method. The GC spectra showed the 5 compounds detected in the Sumbawa oil. In addition, the MS spectra showed these 5 compounds were delta-3-carene, trans-caryophyllene, palmitic acid, palmitoleic acid, and stearic acid. The antioxidant activity of Sumbawa oil was found to be very weak with an IC50 value of 13.49 ± 0.34 mg/mL. Therefore, Palmitoleic acid and palmitic acid were reported to have potential antioxidant activity. These compounds were lipophilic antioxidants that did not properly detect their antioxidant activity using the DPPH method. So, the antioxidant activity of Sumbawa oil was recommended to be analyzed using the β-carotene bleaching method.
DNA Barcoding Analysis Kitolod (Hippobroma longiflora) from Riau Based on matk Gene Herman, Herman; Sari, Mayang; Multivasari, Nella; Roslim, Dewi Indriyani
Jurnal Biologi Tropis Vol. 25 No. 1 (2025): Januari - Maret
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.v25i1.8479

Abstract

The kitolod plant (Hippobroma longiflora) is a traditional medicinal plant originating from the Campanulaceae family. DNA barcoding is a technique for identifying an organism using short nucleotide sequences known as DNA barcoding. One of the DNA barcodes in plants is matK. This research aims to analyze DNA barcode sequence in the matK region of the kitolod plant using the DNA barcode. Samples were taken from the area of Tarai Bangun Village, Kampar Regency, Riau Province, Indonesia as many as two different individuals. The research stages carried out are sampling, followed by DNA isolation using the Geneaid Mini Plant kit, PCR follow thermo scientific instructions, gel agarose electrophoresis, sequencing, and data analysis using the bioinformatics program, namely BioEdit, BLASTn, and MEGA 6.0. The matK sequence of the kitolod plant obtained was 841 bp. The result showed that no identity value was found to reached 100%. The highest identity value (99.88%) was found in H. longiflora NC_035361.1. 34 nucleotide variations were found with one critical nucleotide for H. longiflora from Riau and six critical nucleotides for the H. longiflora. The matK DNA sequence from Kitolod Riau in this study is the first sequence reported in database GenBank.
Bibliometric Analysis of Studies on Glycemic Index, Diabetes, and Rice Consumption Wati, Devni Nevita; Yuniarti, Elsa
Jurnal Biologi Tropis Vol. 25 No. 1 (2025): Januari - Maret
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.v25i1.8482

Abstract

The prevalence of type 2 diabetes continues to increase along with the consumption pattern of high glycemic index foods, such as white rice, which triggers a spike in blood glucose. Alternatives such as brown and black rice with a lower glycemic index and high fiber, resistant starch, and antioxidant content are considered better in controlling blood sugar. This study analyzes research trends related to glycemic index, rice types, and diabetes using the VOSviewer-based bibliometric method from Scopus data from 2017–2021. The results show an increase in research on this topic with four main clusters: risks of white rice, metabolic syndrome, benefits of brown and black rice, and nutritional approaches in diabetes prevention. This study confirms the potential of brown and black rice as alternative strategies for diabetes management and opens up opportunities for further research in this field.
Comparison of Anatomical Structure of Maize (Zea mays L.) Plant of Gorontalo Local Variety Pulut and Momala Ahaya, Cindi; Kandowangko, Novri Youla; Febriyanti, Febriyanti; Ahmad, Jusna; Pagalla, Devi Bunga
Jurnal Biologi Tropis Vol. 25 No. 1 (2025): Januari - Maret
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.v25i1.8483

Abstract

One of the primary agricultural commodities that contributes significantly to global food security is maize (Zea mays L.), a monoecious cereal plant of the Poaceae family with distinct but identical male and female blooms. Local cultivars like Pulut and Momala in Gorontalo have exceptional promise that requires further study, particularly with regard to their anatomical makeup. This study Comparing the two types' stem and leaf anatomical features, including vascular tissue (xylem and phloem), epidermis, and stomata, is the goal of this study. A qualitative descriptive approach was used to make the observations, which were subsequently evaluated and shown as a comparison table. The results showed that at the age of 30 and 40 HST, the network of vessels (xylem and phloem) and epidermis on the stems and leaves of Pulut and Momala corn varieties reflected a development pattern that supported the transportation of water, minerals, and nutrients. The number of stomata in Pulut varieties decreased due to less than optimal growth, while Momala varieties showed an increase in the number of stomata which was influenced by the growth period with environmental conditions suitable for corn plants.  
Morphometric Characterization Study of Apis cerana Worker Bees in North Lombok Regency Erwan, Erwan; Muhsinin, Muhammad; Herlambang, Dany Alfian
Jurnal Biologi Tropis Vol. 25 No. 1 (2025): Januari - Maret
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.v25i1.8490

Abstract

Honeybees (Apis cerana) are one of the indigenous honeybee species of Asia. They serve a crucial function in ecosystems, mostly as pollinators. This study investigates the morphometric characteristics of Apis cerana worker bees in North Lombok Regency, focusing on two beekeeping groups: Harapan Keluarga and Tunas Muda, located in Salut village, Kayangan District North Lombok Regency. Morphometric analysis was conducted on 40 colonies, with measurements taken from eight key body traits: body length, abdomen length, femur length, tibia length, metatarsus length, forewing length, hindwing length, and body weight. Results revealed significant differences between the two locations. Tunas Muda bees exhibited larger morphometric traits with lower coefficient variations, indicating higher population uniformity. Correlation and regression analyses showed that body length, forewing length, and abdomen length strongly influence body weight, with body length having the highest correlation (r = 0.85) and determination coefficient (R2 = 0.722). The study highlights the impact of environmental factors, management practices, and nutritional conditions on bee morphology. These findings provide critical insights for enhancing beekeeping practices, supporting honeybee conservation efforts, and exploring genetic and physiological adaptations in Apis cerana. This research underscores the importance of integrating morphometric analysis into sustainable apiculture and biodiversity conservation strategies in North Lombok.
The Influence of Gibberellin-Rich Phytohormones in Monkey Fern (Cibotium barometz) Extract on Mitigating Cherelle Wilt in Cocoa Plants Saputra, Branmanda Fardhaza; Anggara, Muhammad Tri; Prinandra, Rizkyza; Avianto, Yovi
Jurnal Biologi Tropis Vol. 25 No. 1 (2025): Januari - Maret
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.v25i1.8496

Abstract

Cocoa is one of Indonesia’s main export commodities, but its production has declined due to cherelle wilt disease and environmental stress. Gibberellin hormones have been proven effective in preventing cherelle wilt, but their use is limited by high costs. Extracts from monkey fern leaves offer an economical alternative as a natural source of gibberellin. This study aims to examine the effect of monkey fern extract on the development of cocoa cherelles. The research was conducted from January 2024 to January 2025 on smallholder cocoa farms managed by the Hargomulyo farmer group in Gunungkidul. The treatments compared were foliar spraying of monkey fern extract and a control group. The results showed that the application of monkey fern extract increased the number of healthy cherelles compared to the control. Although total chlorophyll content showed no significant difference, low chlorophyll fluorescence values indicated that the plants experienced heat stress. This condition can disrupt photosynthetic efficiency, but the extract still enhanced carbohydrate accumulation in the seeds. Meanwhile, sucrose, reducing sugar, lipid, and protein contents showed no significant changes.
Community Structure of Gastropoda in The Intertidal Zone of Waloindi Beach, Wakatobi Aba, La; I.A, Dyah Pramesthi; Awiani, Wa; Yanti, Yanti
Jurnal Biologi Tropis Vol. 25 No. 1 (2025): Januari - Maret
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.v25i1.8497

Abstract

Gastropods commonly known as snails, are the largest class of the mollusc phylum. The body of gastropods is equipped with tentacles, eyes, and radula, as well as a well-developed head, where the body of this animal is generally wrapped in a shell. Gastropods have a very wide distribution, both in fresh water, sea, mangrove ecosystems and on land. This study aims to determine the structure of the gastropod community in the intertidal zone of Waloindi Beach, Wakatobi. Research data were obtained through exploration methods at three observation stations, each measuring 100 x 20 meters. Community structure data in the form of density, diversity index, evenness index and dominance index were analyzed descriptively quantitatively. The results of the study found 16 types of gastropods classified into 6 orders, namely Littorinimorpha (genera Conomurex, Stombus, Lambis, and Lentigo). Neogastropoda Order (genus Vasum, Conus, Mitra and Cymbiola) and Trochida Order (genus Turbo and Trochus), as well as Vetigastropoda, Cycloneritida, and Caenogastropoda orders (each found one genus, namely Angaria, Neritida and Cerithium). The highest density of gastropod species was found at station II (seagrass sand substrate) of 0.0635 (ind/m2), while the lowest density of species was found at station I (sand substrate) of 0.0245 (ind/m2). Strombus mutabilis is the species with the highest density, namely 0.023 (ind/m2), and Mitra mitra is the species with the lowest density, namely 0 (ind/m2). The highest gastropod diversity index was found at station II, namely 2.3209 and the lowest diversity was found at station I, namely 2.0643. Overall, the Shannon-Wiener diversity level (H’) of gastropods at the research location was 2.443839, included in the moderate category. The highest gastropod evenness index (E) was found at station II, which was 0.837088931 and the lowest at station I, which was 0.744545361. Overall, the evenness index at the research location was classified as high (E> 0.6). The highest gastropod dominance index (C) was found at station II, which was 0.191005917 and the lowest at station III, which was 0.127595156. Based on these criteria, the dominance index of gastropod species at the research location was classified as low.

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