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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
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Endophytic Fungus, Clerodendrum speciosissimum Jacob-Makoy (Lamiaceae) in West Lombok Nadia, Ahsanu; Harisandi, Hadian; Yoginanta, Muhammad Daffa; Mulyaningsih, Tri
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): April-Juni
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.v25i2.8835

Abstract

Clerodendrum speciosissimum in Indonesia is known as the pagoda plant, which is used as a traditional medicinal plant. Organisms that are in plant tissue for all or part of their life cycle and do not cause infection are called endophytes, which include fungi. Endophytes are known as producers of chemicals in plants. Endophytic fungi are also used as producers of antibacterials, antifungals, and antioxidants. The purpose of this study was to isolate and identify endophytic fungi found in pagoda plant tissue and to determine the presence of endophytic fungi, using the patch method, 12 isolates were successfully isolated and identified into four genera, namely Aspergillus, Penicillium, Phytium, and Phytophthora. The presence of endophytic fungi can be detected in the cortex and pith tissue of the leaf midrib, while in the stem, endophytic fungi are found in the cortex, phloem, and pith tissues.
Environmental Monitoring of Coastal Waters in Poja Village, Bima Regency: A Scientific Base for Sustainable Marine Resource Management Dermawan, Awan; Mujib, Abd Saddam
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): April-Juni
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.v25i2.8836

Abstract

Coastal waters are essential to both marine ecosystems and the livelihoods of local communities, yet they are increasingly vulnerable to degradation due to anthropogenic activities. This study aims to evaluate the water quality of the coastal waters in Poja Village, Sape District, Bima Regency, to assess the environmental health and the impact of local human activities on marine ecosystems. A descriptive-quantitative approach was employed, with water samples collected from seven locations to analyze physical and chemical parameters, including temperature, pH, salinity, ammonia, nitrite, nitrate, and water visibility. The findings revealed that the water quality remains in a favorable condition, with temperatures ranging from 28.3°C to 30.0°C, pH values between 7.3 and 7.8, and salinity within acceptable standards. Nitrate concentrations were recorded between 5 and 10 ppm, indicating some anthropogenic influence, while ammonia and nitrite were undetectable. In conclusion, the coastal waters of Poja Village exhibit good quality, supporting marine ecosystems and local fishing activities. Regular monitoring is essential to ensure the sustainable management and conservation of marine resources.
The Effect of NPK Based Sensors on Hydroponic Growth of Caisim Plants (Brassica Chinensis var. Parachinensis) Oktaviani, Mutia; Fevria, Resti; Vauzia, Vauzia; Razak, Abdul
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): April-Juni
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.v25i2.8837

Abstract

This study aims to make hydroponic plant cultivation the right alternative to overcome land limitations without the need for soil media. This study aims to determine the impact of using NPK-based sensors on the development of Caisim plants (Brassica Chinensis Var. Parachinensis) in a hydroponic system. The research design used a Completely Randomized Design (CRD) with two treatments, namely hydroponics with and without the help of IoT-based NPK sensors. Parameters include plant height, number and area of leaves, fresh weight, and dry weight. Data were analyzed using an unpaired T test at a significance level of 5%.  The results show that the use of NPK sensors has a significant effect on most growth indicators, except for dry weight. The application of this sensor has been shown to increase the efficiency of nutrient absorption needed by plants.  Therefore, this technology is worthy of being a modern solution in hydroponic cultivation to optimize production results efficiently.
Potential of Ipomoea pes-caprae Extract as an Antibacterial: A Literature Review Nuralyza, Imasayu; Hanifa, Nisa Isneni
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): April-Juni
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.v25i2.8839

Abstract

The increasing prevalence of antibiotic resistance shows the urgent need for discovering alternative compounds with potential antibacterial activity. Ipomoea pes-caprae (commonly known as katang-katang) has emerged as a promising natural source of antibacterial agents due to its bioactive constituents, including phenolics, alkaloids, flavonoids, and saponins. The purpose of this article is to review and compare previously reported antibacterial research findings of Ipomoea pes-caprae against various bacterial species. The literature review was conducted using relevant sources obtained from Google Scholar and PubMed databases, covering publications from 2014 to 2024. The findings show that different parts of Ipomoea pes-caprae exhibit antibacterial activity against both Gram-positive and Gram-negative bacterial strains, attributed to the presence of antibacterial compounds. Factors influencing the antibacterial activity of the extracts include the type of test bacteria, the extract concentration, and the solvent used. It can be concluded that Ipomoea pes-caprae has potential as an antibacterial agent.
Genetic Diversity of Red Snapper (Lutjanus erythropterus) in Kaimana Waters Milansari, Sindi; Toha, Abdul Hamid A.; Pranata, Bayu; Dailami, Muhammad; Manangkalangi, Emmanuel; Jeni, Jeni
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): April-Juni
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.v25i2.8840

Abstract

Genetic diversity is one level of biodiversity that is very importan for the resilience of biota in the face of environmental pressures such as cilmater change. However, information on the genetic diversity of red snapper in Kaimana water is still very limited. This study determines the genetic diversity of red snapper (Lutjanus erythropterus) in Kaimana waters, West Papua, to support conservation and sustainable management. The methods used include PCR, DNA sequencing, and phylogenetic analysis using MEGA11, with samples taken from the Kaimana fish market. The results of this study show differences in the percentage of adenine and guanine in sample B81.01, with an average codon composition of 218 codons, where UCU(G) Serine has the highest percentage of 13.8% and RSCU 2.38%, and 20 types of amino acids were detected. Lutjanus erythropterus has 3 haplotypes, with 2 universal haplotypes and 1 specific. In Kaimana waters, the haplotype diversity (hd) value is 0.50000 and the nucleotide diversity (π) is 0.00091, which is influenced by the large population size and high migration ability.
Association of Coral Life Form with Megabenthos, Pasumpahan Island, Padang City Syukra, Rera Agung; Salihat, Rera Aga; Nuraini, Miranda
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): April-Juni
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.v25i2.8842

Abstract

Pasumpahan Island is a popular tourist destination in the Padang area. Increasing tourist activity is suspected to contribute to the degradation of the coral reef ecosystem, as observed during preliminary surveys. Coral reef degradation can significantly impact associated marine organisms, particularly megabenthos species. This study examined the association between coral life forms and megabenthos types through direct field observations. A quadrat method was applied using 5×5 m² plots across nine locations. Data analysis employed 2x2 contingency tables, and association strength was quantified using the Ochiai Index. Researchers identified six coral life forms and four megabenthos types, producing 45 potential association combinations. Results indicated that 39 combinations exhibited no association. The remaining six showed associations, equally divided between positive and negative. Positive associations occurred between mushroom corals and Acanthaster planci, massive corals and Tridacna spp., and encrusting corals and Trochus spp. These relationships were identified as commensal, where species coexist without direct harm. Negative associations were found between massive and encrusting corals, encrusting corals and Tridacna spp., and encrusting corals and Diadema setosum. The Ochiai Index proved effective in detecting species interactions and supporting coral reef ecosystem assessments.
The Effect of Adding Ecoenzyme to Corn-Based Trichoderma asperellum Formula on the Biomass of Rice Sprouts Sagurung, Mariance Dartiani; Anhar, Azwir
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): April-Juni
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.v25i2.8857

Abstract

Improving rice productivity is a key priority to meet the increasing national food demand. This study aims to examine the effect of ecoenzyme addition to a Trichoderma asperellum-based corn medium on the biomass of rice seedlings of the Bujang Marantau variety. The research was conducted using a Completely Randomized Design (CRD) with five ecoenzyme concentration treatments (0%, 20%, 40%, 60%, and 80%) and five replications. Parameters observed were fresh weight and dry weight of seedlings after 14 days of treatment. Data were analyzed using ANOVA at a 5% significance level and followed by Duncan’s New Multiple Range Test (DNMRT). The results showed that ecoenzyme application did not significantly affect the fresh or dry weight of the rice seedlings. The highest fresh weight was found at 20% concentration, while the highest dry weight was at 80%. It is concluded that ecoenzyme has not demonstrated effectiveness in enhancing seedling biomass during the early growth stage, possibly because seedlings still rely on internal food reserves. The findings suggest that ecoenzyme may be more suitable for improving soil quality rather than directly stimulating early plant growth. Further research is recommended to optimize dosage, application methods, and appropriate growth stages for maximum benefit.
Morphological Characteristics of Cucumber (Cucumis sativus L.) Leaves under Different Environmental Conditions Putri, Ulfa Dwi; Vauzia, Vauzia; Chatri, Moralita; Handayani, Dezi
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): April-Juni
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.v25i2.8865

Abstract

Cucumber (Cucumus sativus L.) is a horticultural crop with high water content, low calories, and potential benefits as an antibiotic, lipid-lowering agent, and antioxidant. This Plant has great potential for cultivation, as it can be marketed both domestically and internationally. However, cucumber production remains relatively low and has declined from 2022 to 2023. This decrease is caused by several factors, one of which is changing environmental conditions. Therefore, the plant's ability to adapt to different environmental conditions becomes a crucial factor in the effort to develop cucumber cultivation. Based on this, the present study was conducted to investigate the morphological characteristics of cucumber leaves under different environmental conditions. This research was conducted from September 2024 to January 2025 in two different locations, namely Kota Padang and Kamang Magek. The method used in this study was a Completely Randomized Design (CRD) with 2 treatments and 20 replications. The data obtained were analyzed using a t-test at a 5% significance level. The results showed that there were significant differences in leaf length and the number of leaf vein branches between the two research locations. The average leaf length in Kota Padang was higher, at 12.21 cm, compared to Kamang Magek, which only reached 10.42 cm. In contrast, the average number of leaf vein branches in Kamang Magek was higher, at 14.65, compared to Kota Padang, which was only 13.3. Meanwhile, no significant differences were found in leaf width and petiole length between the two locations.
Betasianin Analysis of Dragon Fruit (Hyolecerus polyrhizus) West Sumatra as A Natural Colorant Putri, Amaliani; Yuniarti, Elsa; Violita, Violita; Chatri, Moralita
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): April-Juni
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.v25i2.8866

Abstract

The growing demand for natural food colorants, driven by consumer awareness of the health risks associated with synthetic additives, has increased the exploration of plant-based pigments. Betacyanin, a red-violet pigment in the betalain group, has drawn attention for its color stability and antioxidant properties. This study aimed to analyze the betacyanin content in the peel of red dragon fruit (Hylocereus polyrhizus) from two cultivation areas in West Sumatra (Tanah Datar and Bukittinggi) as a potential natural food colorant. The dragon fruit peels were dried, ground into powder, and extracted using 10% citric acid solution. The extract was concentrated and analyzed using UV-Vis spectrophotometry. Results showed a significant difference in betacyanin levels between the two sources: Tanah Datar samples had an average of 28.48±0.19 mg/100g, while Bukittinggi samples had 3.52±0.07 mg/100g. These findings suggest that geographical and environmental factors significantly affect pigment accumulation. It is recommended that Tanah Datar dragon fruit peel be further developed as a natural colorant due to its high betacyanin content, supporting sustainable practices and waste reduction in food processing.
Correlation Between Noise Levels and Noise-Induced Hearing Loss in Ground Handling Officers at Kualanamu Airport Putra, Aldi Maulana; Herwanto, Yusa; Lubis, Yuliani M.; Ashar, Taufik
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): April-Juni
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.v25i2.8867

Abstract

Airport ground handling officers are highly exposed to noise from aircraft operations, potentially leading to Noise-Induced Hearing Loss (NIHL). This study aims to investigate the correlation between noise levels and NIHL among ground handling officers at Kualanamu Airport. A cross-sectional observational design was applied. Data on noise levels were obtained using a sound level meter, and NIHL was assessed with a calibrated Interacoustics audiometer AD528. Among 23 officers exposed to 95 dB, 16 (69.6%) had NIHL, and among 5 officers exposed to 100 dB, 4 (80%) had NIHL. Statistical analysis using the Kruskal-Wallis test confirmed a significant relationship between noise levels and NIHL (p<0.001). The study highlights the need for preventive strategies in noisy airport environments. The conclusion is that there is a significant correlation between occupational noise exposure and the incidence of Noise Induced Hearing Loss (NIHL) among ground handling officers at Kualanamu International Airport.

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