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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 2,695 Documents
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The Impact of Bokashi and NPK Fertilizer Applications on Pakchoy (Brassica rapa L.) Growth Raksun, Ahmad; Zulkifli, Lalu; Mertha, I Wayan; Santoso, Didik; Ilhamdi, Moh. Liwa
Jurnal Biologi Tropis Vol. 26 No. 2 (2026): 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.v26i2.11543

Abstract

The growth of pakchoy is determined by the availability of nutrients around its root system. Research on the effect of bokashi and NPK fertilizer on pakchoy vegetative growth was conducted from May to August 2025. This study aimed to measure the increase in pakchoy growth after being given bokashi and NPK fertilizer. The pakchoy planting experiment was conducted using a completely randomized design with two factors. Pakcoy was planted in experimental pots, given bokashi treatment 3 days before planting and given NPK fertilizer 15 and 22 days after planting. The results of the experiment showed that: (1) the vegetative growth parameters of pakchoy given 1.5 g of NPK fertilizer were significantly different from the control, except for leaf width, (2) the vegetative growth parameters of pakchoy given 1.6 kg of bokashi were significantly different from the control, except for leaf width, (3) The interaction of bokashi and NPK fertilizer did not significantly affect the vegetative growth of pakchoy.
Quantification of Total Biomass and Carbon Stock in Oil Palm Plantations Based on Compartments: Main Stand and Understory Vegetation Al-faruq, Khoirul Ummah; Yuniasih, Betti; Noviyanto, Amir
Jurnal Biologi Tropis Vol. 26 No. 2 (2026): 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.v26i2.11568

Abstract

Oil palm plantations play a role in carbon storage; however, field-based information on biomass and carbon stock distribution among vegetation compartments remains limited. This study aimed to estimate biomass and carbon stocks of oil palm plantations based on main stand components and understory vegetation across immature (TBM), prime mature (TM Prime), and old mature (TM Old) growth phases. Field measurements were conducted in Central Kalimantan using plot sampling with a planting density of approximately 143 trees ha⁻¹. Main stand biomass was estimated non-destructively using compartment-based allometric equations, while understory biomass was measured destructively. The results showed an increase in biomass from approximately 94 kg tree⁻¹ at the TBM stage to 486–517 kg tree⁻¹ at the TM Prime stage and 495–582 kg tree⁻¹ at the TM Old stage, following a sigmoid growth pattern. Carbon stock was predominantly contributed by the oil palm main stand (5290.59 t C ha⁻¹), whereas understory vegetation contributed only a minor proportion (0.247 t C ha⁻¹). These findings provide transparent empirical data to support greenhouse gas accounting within the Indonesian Sustainable Palm Oil (ISPO) framework.
Literature Review: Variant of Kratom (Mitragyna speciosa (Korth.) Havil) in West Kalimantan Rahmad, Rahmad; Nusantoro, Bagus Pratomo; Reza, Reza; Al Awwali, Zidan Hafidz
Jurnal Biologi Tropis Vol. 26 No. 2 (2026): 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.v26i2.11581

Abstract

Kratom is a plant with potential biological diversity. This plant can grow in tropical areas with humid conditions, which is why it can be found in West Kalimantan and is known by the local people as purik leave. The purpose of this research is to summarize information related to kratom variant and provide a comprehensive overview of the presence of kratom plant in West Kalimantan. This research used a literature review method, focusing on national and international journals from the last 10 years accessed with Google Scholar with the help of the Publish or Perish search application. The search results show that there are three kratom variant in West Kalimantan namely red vein, white vein, and green vein, variant which can be distinguished by specific difference in color and leaf vein characteristics. Variant of kratom show their own distinctive characteristics even though these three variant are still within the same kratom species the scientific name Mitragyna speciosa (Korth.) Havil. This research is expected to serve as a source of the information and reference that can research related to kratom plant.
Density and Community Structure of Terrestrial Insects in an Integrated Agricultural Laboratory in Jagan, Sukoharjo, Indonesia Armania, Vallery; Adi Nugroho, Anwari
Jurnal Biologi Tropis Vol. 26 No. 2 (2026): 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.v26i2.11582

Abstract

Terrestrial insects play an important role in maintaining the balance of agricultural ecosystems, studies specifically examining their community structure in educational agroecosystems, such as integrated agricultural laboratories, remain limited, thereby highlighting the need to assess their density and ecological indices as indicators of environmental conditions. The study aimed to measure the density, diversity index, richness index, evenness index, and dominance index of terrestrial insects using twelve pitfall traps at the Jagan Sukoharjo Integrated Agricultural Laboratory. The study used the pitfall trap method with twelve traps placed randomly in the study area. Observations were made for 3 consecutive days. The data collected consisted of the number of individuals of each type of terrestrial insect, which were then analyzed using density, diversity, richness, evenness, and dominance indices. The results indicate that the Integrated Agricultural Laboratory of Jagan supports a relatively high richness of terrestrial insect species; however, the community structure is still dominated by a few opportunistic species, reflecting the characteristics of an educational agroecosystem with a moderate level of ecological stability. These findings indicate that the terrestrial insect community at the Jagan Integrated Agricultural Laboratory is diverse and has the potential to reflect the ecological conditions of the local agricultural environment. Furthermore, this study provides empirical evidence that strengthens the use of terrestrial insects as bioindicators in educational agroecosystems and contributes to the development of sustainable agroecosystem management strategies through biodiversity-based monitoring.
An Ethnobotanical Study of Medicinal Plants Used for the Treatment of Gout by the Community of Bandung City Nabila, Hasna; Aryanto, Arie
Jurnal Biologi Tropis Vol. 26 No. 2 (2026): 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.v26i2.11598

Abstract

Gout is a metabolic disorder characterized by elevated uric acid levels that can cause inflammation and joint pain. In recent years, the incidence of gout has increased, including among younger populations, highlighting the need for alternative and complementary treatments. This study aimed to explore the ethnobotanical knowledge of medicinal plants used by the community of Ujungberung District, Bandung City, in the management of gout. This research employed a qualitative ethnobotanical approach. Data were collected through in-depth interviews, participatory observation, and literature review involving 20 selected informants using purposive sampling. The study was conducted from December 2025 to January 2026. The results identified nine medicinal plant species commonly used to treat gout, with ginger, turmeric, and bay leaf being the most frequently utilized. The plants were mainly processed by boiling, and their use was based on traditional knowledge passed down through generations. These plants contain bioactive compounds such as flavonoids, curcuminoids, and essential oils, which are known to have anti-inflammatory and uric acid–lowering properties. In conclusion, the community in Ujungberung District continues to rely on medicinal plants as a complementary therapy for gout management. This study emphasizes the importance of documenting ethnobotanical knowledge and highlights the potential of local medicinal plants as accessible and affordable alternatives for gout treatment.
Blue Light Exposure Duration Improves Antioxidant Capacity in Mung Bean Seedlings (Vigna radiata L.) Siswanto, Kaylee Ann; Bagus, Artadana Made Ida
Jurnal Biologi Tropis Vol. 26 No. 2 (2026): 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.v26i2.11604

Abstract

Antioxidant chemicals found in mung bean (Vigna radiata L.) sprouts may help prevent non-communicable diseases linked to oxidative stress; however, it is unknown how long exposure to blue light affects the build-up of these bioactive substances. This study aimed to evaluate the effect of different duration of blue LED light exposure on growth, antioxidant activity, and antioxidant-related compound in mung bean sprout. Three replications of a completely randomized design (CRD) were used. The Folin-Ciocalteu method was used to measure total phenolic content, iodometric titration was used to measure vitamin C, and the DPPH assay was used to measure antioxidant activity. According to the results, antioxidant activity increased significantly (p<0.05) under 24-hour exposure to blue light (30.34±0.61%) compared to darkness (26.40±0.39%). Additionally, tests made using the Folin-Ciocalteu technique and iodometric titration show an increasing tendency when exposed to blue light. Dry weight and hypocotyl length were not considerably impacted by light treatment. These results suggest that blue light duration is important for boosting antioxidant capacity without sacrificing development. This discovery offers a workable method for enhancing the functional quality of mung bean sprouts for controlled-environment agriculture systems and functional food development.
Length-Weight Relationship of Bullet Tuna (Auxis rochei) Landed at Kendari Ocean Fishing Port Azis, Muh. Aksa; Paluphi, Raut Wahyuning; Widhi, Raut Nugrahening; Disnawati, Disnawati
Jurnal Biologi Tropis Vol. 26 No. 2 (2026): 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.v26i2.11607

Abstract

Bullet tuna (A. rochei) is a species of pelagic fish that holds significant economic importance and serves as a source of livelihood for fisherman. The purpose of this study was to determine length-weight relationship of bullet tuna (A. rochei) landed at Kendari Ocean Fishing Port. Sampling of bullet tuna (A. rochei) using random sampling method. The analysis used in this study is linear regression analysis. The results of the study indicate that 600 rochei tuna (A. rochei) caught ranged in length from 152 to 265 mm and weighed between 70 and 285 grams. The length and weight of bluefin tuna (A. rochei) were strongly correlated (r = 0.68) with a negative allometric growth pattern (b = 2.0175). These results suggest that the rate of length growth is more dominant than the rate of weight gain in fish. The growth patterns obtained from the results of the length-weight relationship research are crucial for sustainable fisheries management, such as regulating the selectivity of fishing gear.
Characterization of Fern Spores in the Treehouse Ecotourism Area of Waai Village, Central Maluku Hakapaa, Adriana; Sahureka, Thalia; Latue, Philia C.; Sinay, Hermalina
Jurnal Biologi Tropis Vol. 26 No. 2 (2026): 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.v26i2.11624

Abstract

Ferns (Pteridophyta) are vascular plants possessing true roots, stems, and leaves, and they reproduce by spores, whose morphological characteristics constitute critical diagnostic features for taxonomic identification. The Treehouse Ecotourism Area of Waai Village harbors significant fern diversity that is increasingly threatened, rendering spore characterization an essential approach for conservation, species identification, and the advancement of scientific research as well as ecotourism development. The aim of this study was to examine the characteristics of fern spores found in the Tree houses ecotourism area, Waai Village, Central Maluku, as a contribution to conservation efforts, ecotourism education, and the enrichment of fern micromorphological references in Maluku. The research was conducted using an exploratory survey method along an approximately 20-km trail from the entrance gate to the tourism site. Fern leaf samples were collected to observe soral and spore structures using whole-mount preparations, followed by acetolysis, washing, staining, and mounting procedures. Characterization was carried out microscopically, focusing on sorus form, position, and color, as well as spore morphology, including grain shape and aperture type. The results revealed nine spore-bearing fern species: Pteris vittata, Cyclosorus interruptus, Pteridium aquilinum, Blechnopsis orientalis, Sticherus underwoodianus, Nephrolepis exaltata, Lygodium microphyllum, Lygodium flexuosum, and Pityrogramma calomelanos. The observed soral characters varied from linear, laminar, and granular to powdery forms, and were located either abaxially or adaxially. Spore shapes included oval, round, and triangular forms, with both monolete and trilete laesura types. This variation in soral and spore characteristics provides a basis for the taxonomic identification of ferns and supports further studies in biogeography and phylogenetics.
Manganese (Mn) Accumulation in Jerbung Shrimp (Penaues merguensis) from the Sungsang Estuary, South Sumatra Liana, Anjar Puteri; Putri, Wike Ayu Eka; Melki, Melki; Barus, Beta Susanto; Fitri Agustriani
Jurnal Biologi Tropis Vol. 26 No. 2 (2026): 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.v26i2.11628

Abstract

Estuaries are intermediate environments that are extremely susceptible to pollution, especially heavy metals like manganese (Mn). The goals of this research were to determine the amount of manganese in the consumable flesh of Jerbung shrimp (Penaeus merguiensis) taken from the Sungsang Estuary in Banyuasin Regency, South Sumatra, Indonesia, and to ascertain the safe intake levels for people. Atomic Absorption Spectrophotometry (AAS) was used to analyze the shrimp samples at a wavelength of 257. 61 nm. According to the findings, the average Mn content in shrimp muscle was somewhat higher than the limit set by the European Food Safety Authority (EFSA), falling between 3. 16 and 3. 21 mg/kg. Even if just shrimp are consumed, the projected consumption limits based on dietary intake calculations still suggest a comparatively low immediate health risk. However, the high Mn concentration indicates the effect of environmental pollution brought about by human actions in the Musi River estuary. These findings emphasize the significance of controlling pollution sources and carrying out routine environmental monitoring to ensure the safety of seafood and the sustainability of estuarine ecosystems.
Carbon Stock Estimation in Tanjung Plants (Mimusops elengi L.) in the Campus Forest of Surabaya State University Rohmah, Daniyah Fathinur; Rachmadiarti, Fida; Fitrihidajati, Herlina; Andriani, Betty
Jurnal Biologi Tropis Vol. 26 No. 2 (2026): 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.v26i2.11647

Abstract

Forests have a role in the global carbon cycle by absorbing and storing carbon in the environment. One of the plants in the campus forest of Surabaya State University that can absorb carbon and store it in the form of biomass is the tanjung plant (Mimusops elengi L.). This study aims to estimate the carbon stock stored in tanjung plants (Mimusops elengi L.) in the campus forest of Surabaya State University which was carried out from September to December 2024. The research method uses a non-destructive method. The parameters measured in this study include stem diameter, circumference, height, chlorophyll content, leaf surface area and environmental parameters that support the growth of Mimusops elengi. The data collection technique was carried out by purposive sampling, at three stations with a total of 50 individuals. Statistical analysis of the data used the Pearson correlation test. Mimusops elengi was able to absorb carbon respectively by 106.03 kg; 43.96 kg and 31.89 kg. Having a biomass respectively, namely 225.08 kg/tree; 91.01 kg/tree and 67.87 kg/tree. The absorption values were 389.14 tons C/ha; 161.34 tons C/ha and 117.0 tons C/ha, respectively. The results of statistical tests on height, circumference and diameter had a positive correlation with carbon stock. Meanwhile, chlorophyll content and leaf surface area were negatively correlated with carbon stock. These results indicate that tanjung plants have significant potential in absorbing carbon in the campus forest of Surabaya State University, thus playing a role in reducing greenhouse gas emissions in the atmosphere.

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