cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota mataram,
Nusa tenggara barat
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
 239   240   241   242   243 
Plankton and Macrozoobenthos as Bioindicators of Water Quality in the Gendol River, Yogyakarta Idris, Muhammad Arsya; Langsa, Pelangi Karen; Treeza, Yoanita Amanda; Nabila, Faisa Nisrina Zakiyatun; Panggabean, Christina Romauli; Andini, Novia Fitri; Handziko, Rio Christy; Mualimin, Mualimin
Jurnal Biologi Tropis Vol. 25 No. 4b (2025): Special Issue
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.v25i4b.10888

Abstract

The Gendol River, originating from the slopes of Mount Merapi, is one of the main freshwater sources in Yogyakarta and is increasingly affected by anthropogenic activities that may alter its water quality. This study aimed to assess the water quality of the Gendol River using an integrated analysis of physical, chemical, and biological parameters, with plankton and macrozoobenthos communities serving as bioindicators. Sampling was conducted at three stations representing upstream, midstream, and downstream sections using standard limnological methods. Physical and chemical parameters included temperature, turbidity, pH, dissolved oxygen, biochemical oxygen demand, and salinity, while biological parameters focused on the identification of plankton and macrozoobenthos. The results indicated a longitudinal decline in water quality from upstream to downstream, characterized by increasing organic load, reduced water clarity, and decreasing biological diversity. Changes in plankton composition and the dominance of tolerant macrozoobenthos taxa reflected varying levels of environmental disturbance along the river. These findings confirm that plankton and macrozoobenthos are effective bioindicators for evaluating ecological conditions in tropical freshwater systems and highlight the need for improved river management strategies, particularly in controlling anthropogenic pressures to maintain the ecological sustainability of the Gendol River.
Antibacterial Activity Test of Endophytic Microbes of Bird's Nest Fern (Asplenium nidus) Against Propionibacterium acnes Bacteria Roza, Rodesia Mustika; Wardani, Cloudia Pramesti Kusuma
Jurnal Biologi Tropis Vol. 25 No. 4a (2025): Special Issue
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.v25i4a.10890

Abstract

Acne is a widespread skin treatment frequently seen within Indonesia. This condition, also known as Acne vulgaris, arises from an infection or irritation affecting the pilosebaceous units. This is caused by obstructions and build-up of keratin, which are spurred on by the existence of Propionibacterium acnes bacteria. Current acne treatment uses a lot of synthetic antibiotics, as a result if used for a long period of time it can increase resistance so that acne is difficult to cure. One effort to overcome drug resistance is to utilize endophytic bacteria that have the ability to produce similar compounds from their host plants including antibacterial compounds. Plants that have the potential as antibacterials are bird's nest ferns (Asplenium nidus). The content of this plant is flavonoids, alkaloids, terpenoids, phenolics, tannins, and saponins. This research intends to evaluate the antibacterial properties of endophytic microorganisms derived from the A. nidus plant against P. acnes bacteria. The assessment of antibacterial capabilities was performed through the utilization of the agar disk diffusion technique. The separation process resulted in a total of 16 endophytes, which were further categorized into 11 bacterial strains and 5 fungal strains. Evaluation of the antibacterial properties of the endophytes revealed that 9 bacterial endophyte strains could impede the proliferation of P. acnes, with strain BRAN 10 exhibiting the greatest antibacterial effect, characterized by a zone of inhibition measuring 13.47 mm in diameter. Isolate JDAN 3 demonstrated the most potent antifungal activity among the endophytes, marked by an inhibition zone diameter of 9.9 mm.
Cadmium (Cd) Content in Sediments Along the Somber River, Balikpapan City, East Kalimantan Mufidah, Fitriatul; Paputungan, Mohammad Sumiran; Ritonga, Irwan Ramadhan
Jurnal Biologi Tropis Vol. 25 No. 4b (2025): Special Issue
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.v25i4b.10891

Abstract

Human activities in the Somber River area of Balikpapan, such as settlements, industry, shipping, and fisheries, have the potential to cause cadmium (Cd) contamination, threatening the mangrove ecosystem and aquatic biota. This study aimed to determine the concentration and contamination level of Cd in the sediments of the Somber River, Balikpapan. Sediment samples were systematically collected from four stations representing different anthropogenic influences, using a hand corer (50 cm depth). Cadmium concentration was analyzed using Atomic Absorption Spectrophotometry (AAS) following acid digestion. It was found that the Cd concentrations ranged from 0.04 to 1.01 µg/g, with an average of 0.37 ± 0.29 µg/g dry weight. All values were below the national sediment quality guideline. The accumulation of Cd showed an increasing trend with greater sediment depth. The calculated Contamination Factor (CF) indicated low to moderate contamination levels at all stations. Overall, the sources of Cd along the Somber River originate from both natural processes and anthropogenic activities from the land.
Diversity of Pathogenic Fungi on Maize Seeds (Zea mays L.) in Traditional Markets of Kedaton District, Bandar Lampung Hernawan, Renaldy; Yulianty, Yulianty; Azizah, Enur; Irawan, Bambang
Jurnal Biologi Tropis Vol. 25 No. 4b (2025): Special Issue
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.v25i4b.10896

Abstract

Corn (Zea mays L.) is an important food commodity widely consumed and sold in traditional markets. However, poor post-harvest handling and storage conditions make corn kernels susceptible to infections by pathogenic fungi, which can reduce quality and potentially produce harmful mycotoxins. This study aimed to determine the diversity and dominant genera of pathogenic fungi infecting corn sold in traditional markets in Kedaton District, Bandar Lampung. The research was conducted from June to July 2025 using a purposive sampling method across seven traditional markets, with a total of 21 samples. Fungal isolation was carried out on PDA media, followed by macroscopic and microscopic identification. The results showed that four fungal genera infected the corn kernels, namely Fusarium sp., Rhizopus sp., Penicillium sp., and Aspergillus sp. Fusarium sp. was identified as the most dominant genus, found in 12 out of 21 samples, while Aspergillus sp. had the lowest occurrence, appearing in only one sample. The presence of these fungi indicates that corn storage practices in traditional markets are still inadequate and may pose health risks. Further studies at the molecular level and tests of natural antifungal extracts are recommended to strengthen fungal identification and improve post-harvest fungal control efforts.
Diversity and Composition of Macroalgae in the Rambang Delta, East Lombok Ghazali, Mursal; Artiningrum, Novita Tri; Setyaningrum, Tri Wahyu; Nurhayati, Nurhayati; Murdiah, Murdiah
Jurnal Biologi Tropis Vol. 25 No. 4b (2025): Special Issue
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.v25i4b.10898

Abstract

Delta ecosystems represent dynamic coastal transition zones that play a crucial role in maintaining ecological balance and supporting biological productivity. The Rambang Delta in East Lombok, Indonesia, is influenced by tidal mixing and freshwater discharge, creating heterogeneous environmental conditions that support diverse benthic macroalgae communities. This study aimed to analyze the composition, diversity, and spatial distribution of macroalgae and evaluate the influence of environmental parameters on community structure across three sampling stations exposed to aquaculture activities. Macroalgae samples were collected using purposive sampling within 1×1 m plots, identified morphologically, and analyzed using species importance value index (INP), Shannon–Wiener diversity (H′), evenness (E), and Simpson dominance index (D). Ten water quality parameters were measured in situ and exitu to assess ecological conditions. The results of the study indicate that the environmental parameters of the research location are partly within the environmental quality standards, such as temperature, salinity, pH, and current. While turbidity, PO4-P, NH3-N, and DO are outside the environmental quality standards. The number of species found was 56, consisting of 25 species of chlorophyta macroalgae, 19 species of Rhodophyta, and 12 species of Phaeophyta. Station 1 has an H′ value of 1.9, while Station 2 and Station 3 have values of 2.6 and 2.7, respectively. Meanwhile, the uniformity index (E) value at Station 1 is 0.63, 0.66 at Station 2, and 0.74 at Station 3. In contrast, the dominance index (D) at Station 1 is 0.22, and Stations 2 and 3 have a dominance index value of 0.12.
Integrating Bio P2000Z and NPK Fertilizers on Yield of Local Soybean to Support Food Self-Sufficiency Pebian, Dhio Faturrohman Adha; Arti, Inti Mulyo; Azmi, Tubagus Kiki Kawakibi
Jurnal Biologi Tropis Vol. 25 No. 4b (2025): Special Issue
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.v25i4b.10900

Abstract

Soybean (Glycine max L. Merril) is a major food commodity with high demand in Indonesia, both for consumption and industrial purposes. Efforts to increase soybean productivity require optimal fertilization, including a combination of Bio P2000Z and NPK fertilizer. This study aimed to analyze the effects of Bio P2000Z and NPK fertilizers on the growth and yield of the Ratu Serang soybean variety. The research was conducted from January to May 2025 at the Gunadarma University Technopark field in Cianjur, using a Factorial Randomized Complete Block Design (RCBD) with two factors: Bio P2000Z concentration (0, 5, 10%) and NPK fertilizer dosage (0, 1, 3 g/plant). There were nine treatment combinations with four replications, resulting in a total of 36 experimental units. The observed parameters included flowering ageand yield (harvest age, number of pods per plant, fresh biomass weight, and dry biomass weight). Data were analyzed using ANOVA at a 5% significance level followed by the Duncan Multiple Range Test (DMRT) post-hoc test. The results showed that both Bio P2000Z and NPK fertilizers had a significant effect on the growth and yield of the Ratu Serang soybean variety.
Antibacterial Activity of Red Ginger (Zingiber officinale) Extract Against Diarrhea Causing Bacteria Using the Well Diffusion Method Fuzianingsih, Eka Noviya; Rahmawati, Ayu Sintya Citra; Safitri, Yunita Diyah
Jurnal Biologi Tropis Vol. 25 No. 4a (2025): Special Issue
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.v25i4a.10911

Abstract

Acute diarrhea resulting from bacterial infections remains a significant concern in public health. The improper or excessive use of antibiotics contributes to the emergence of antibiotic resistance, creating a need for safer therapeutic alternatives derived from natural sources, such as red ginger (Zingiber officinale). This study aimed to evaluate the antibacterial potential of red ginger extract against Escherichia coli, one of the common bacterial agents causing diarrheal disease. The assessment was carried out using the well-diffusion technique by observing and measuring the diameter of the inhibition zones produced by the extract. The extract was tested at concentrations of 40%, 60%, and 80%, accompanied by a positive control (ciprofloxacin 1 mg/mL) and a negative control (distilled water). The findings demonstrated that the positive control produced a mean inhibition zone of 44.375 mm, whereas the negative control showed no inhibitory activity. The 40% extract yielded an average inhibition zone of 17.125 mm, the 60% concentration produced 19.625 mm, and the 80% concentration generated an average diameter of 22 mm. Statistical evaluation using one-way ANOVA indicated a significance level of ≤ 0.05, and the Duncan post hoc analysis confirmed significant differences between all extract concentrations compared to the antibiotic control. Overall, the study demonstrated that red ginger extract possesses substantial antibacterial activity and effectively suppresses the growth of diarrhea-causing E. coli through the well-diffusion approach.
Mapping of Stranded Marine Biota Incidents in 2025 in the Denpasar BPSPL Work Area: A Spatial Perspective Febrianti, Nova; Indriyawan, Muji Wasis; Saputra, Dewa Gde Tri Bodhi; Jefri, Edwin
Jurnal Biologi Tropis Vol. 25 No. 4b (2025): Special Issue
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.v25i4b.10913

Abstract

Indonesia’s coastal areas experience frequent marine biota stranding events, particularly in regions with high human activity. This study aims to describe the spatial distribution of marine biota strandings recorded in 2025 within the working area of BPSPL Denpasar, covering Bali, East Java, West Nusa Tenggara, and East Nusa Tenggara Provinces. Data were collected from field response activities and reports submitted by local communities and related institutions, then analyzed descriptively and mapped using Geographic Information Systems (GIS) with ArcMap 10.8. A total of 21 stranding events were recorded, dominated by whales and sea turtles, with most individuals found dead (71.4%), resulting in burial as the most commonly applied handling method. Spatial analysis indicates that stranding events were mainly concentrated along the western–northern coast of Bali, the southern coast of East Java, and the northern coast of Timor Island. These findings demonstrate that GIS-based mapping is effective for identifying stranding-prone areas and can support improved response strategies and sustainable marine conservation efforts.
Resistance Profile of Gram Negative Bacilli in Diabetic Ulcers to Meropenem and Imipenem Antibiotics Saputri, Fadhilah Nur Amalia; Hanifah Zulkarnaen; Ardy Prian Nirwana
Jurnal Biologi Tropis Vol. 25 No. 4a (2025): Special Issue
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.v25i4a.10914

Abstract

Increasing resistance of Gram-negative bacilli to carbapenems poses a serious threat to diabetic ulcer management. This descriptive cross-sectional study aimed to determine the resistance profiles of Gram-negative bacilli isolated from diabetic ulcers against imipenem and meropenem. Pus samples form 20 patients were identified via biochemical tests and subjected to sensitivity testing using the Kirby-Bauer disk diffusion method (CLSI M100 Ed. 35 standards). The result Pseudomonas aeruginosa (40%) as the predominant species. Susceptibility testing revealed that P.aeruginosa exhibited resistance to meropenem (63%) compared to imipenem (37.5%), while Eschericia coli and Enterobacter aerogenes showed complete resistance resistance (100%) to both antibiotics. In conclusion, Gram-negative bacilli in the study demonstrated better susceptibility to imipenem than meropenem, suggesting imipenem as a potentially more effective option for empirical therapy. These finding semphasezi the  critical need for pariode surveillance and strict antibiotic stewardship to pravent further escalation of carbapenemn resistance in diabetic care settings.
Formulation and Characterization Profile of Sugarcane (Saccharum officinarum L.) Leaf Extract Emulsion Sishartami, Lintang Widya; Weningtyas, Anditri; Ariesaka, Kiky Martha; Wiratama, Arif Ladika; Wibisono, Taurisma Aulia Nanda
Jurnal Biologi Tropis Vol. 25 No. 4b (2025): Special Issue
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.v25i4b.10932

Abstract

Sugarcane (Saccharum officinarum L.) leaves contain various bioactive compounds, which exhibit antioxidant and pharmacological potential. However, their application in pharmaceutical preparations faces challenges due to low solubility, stability, and bioavailability. Therefore, the development of an emulsion formulation is needed to improve its stability and absorption. This study aims to determine the phytochemical content of sugarcane leaf extract and to evaluate the physical stability of its emulsion formulation. The extraction was obtained through maceration using 96% ethanol, followed by phytochemical screening. Emulsions were prepared using sugarcane leaf extract as the active ingredient, Virgin Coconut Oil (VCO) as the oil phase, Tween 80 as a surfactant, and PEG 400 as a co-surfactant. The formulations were tested for organoleptic properties, emulsion type, percent transmittance, pH, particle size, polydispersity index, zeta potential, centrifugation, and cycling stability. The results showed that sugarcane leaf extract contained flavonoids, alkaloids, tannins, phenols, triterpenoids, and saponins. Among the four tested formulas, F1 and F2 showed the best stability, with pH 6–7, high percent transmittance, uniform particle size with polydispersity index <0.3, and absence of phase separation. These findings suggest that F1 and F2 represent optimal emulsion formulations for further pharmaceutical development.

Page 241 of 252 | Total Record : 2520

 239   240   241   242   243 

Filter by Year

2013 2026


Reset
Filter By Issues
All Issue Vol. 26 No. 1 (2026): Januari-Maret Vol. 25 No. 4b (2025): Special Issue Vol. 25 No. 4a (2025): Special Issue Vol. 25 No. 4 (2025): Oktober-Desember Vol. 25 No. 3 (2025): Juli-September Vol. 25 No. 2 (2025): April-Juni Vol. 25 No. 1 (2025): Januari - Maret Vol. 24 No. 4 (2024): Oktober - Desember Vol. 24 No. 3 (2024): July - September Vol. 24 No. 2b (2024): Special Issue Vol. 24 No. 2 (2024): April - Juni Vol. 24 No. 1 (2024): Januari - Maret Vol. 24 No. 1b (2024): Special Issue Vol. 23 No. 4 (2023): October - December Vol. 23 No. 3 (2023): July - September Vol. 23 No. 2 (2023): Special Issue Vol. 23 No. 2 (2023): April-June Vol. 23 No. 1 (2023): Special Issue Vol. 23 No. 1 (2023): January - March Vol. 22 No. 4 (2022): October - December Vol. 22 No. 3 (2022): July - September Vol. 22 No. 2 (2022): April - June Vol. 22 No. 1 (2022): January - March Vol. 21 No. 3 (2021): September - Desember Vol. 21 No. 2 (2021): Mei - Agustus Vol. 21 No. 1 (2021): Januari - April Vol. 20 No. 3 (2020): September - Desember Vol. 20 No. 2 (2020): Mei - Agustus Vol. 20 No. 1 (2020): Januari - April Vol. 19 No. 2 (2019): Juli - Desember Vol. 19 No. 1 (2019): Januari - Juni Vol. 18 No. 2 (2018): Juli - Desember Vol. 18 No. 1 (2018): Januari - Juni Jurnal Biologi Tropis vol.17 No.2 Desember 2017 Jurnal Biologi Tropis vol.17 No.1 Juni 2017 Jurnal Biologi Tropis. Vol.16 No.2 Desember 2016 Jurnal Biologi Tropis. Vol.16 No. 1 Juni 2016 Jurnal Biologi Tropis. Vol.15 no.2 Desember 2015 Jurnal Biologi Tropis. Vol.15 No. 1 Juni 2015 Jurnal Biologi Tropis. Vol.14 No. 2 Desember 2014 Jurnal Biologi Tropis. Vol.14 No. 1 Juni 2014 Jurnal Biologi Tropis. Vol.13 No. 2 Desember 2013 Jurnal Biologi Tropis. Vol.13 No.1 Juni 2013 More Issue