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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 2,949 Documents
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Influence of Rainfall and Fire Caterpillar on Oil Palm Yield at Tor Gamba Yudi Fahmi; Anna Kusumawati; Sutan Borohim Siregar
Jurnal Biologi Tropis Vol. 26 No. 3 (2026): Juli - September
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.v26i3.12224

Abstract

As a strategic plantation commodity, oil palm (Elaeis guineensis Jacq.) plays a crucial role in supporting Indonesia's national economy, yet its productivity is strongly influenced by climatic variability and pest pressure, particularly fire caterpillar (Limacodidae) attacks that damage foliage and reduce photosynthetic capacity. This study aimed to analyze the relationships between annual rainfall, fire caterpillar attack intensity, and fresh fruit bunch (FFB) productivity at PT Perkebunan Nusantara III Tor Gamba I Plantation over a five-year period (2012–2016; n = 5 annual observations). A quantitative observational-correlational design was applied using secondary archival data on rainfall (mm/year), pest attack intensity (mean larvae per frond), and FFB yield (kg/ha/year). Pearson correlation and paired T-tests were conducted at a 5% significance level (df = 3; T-table = 2.78). Rainfall showed a very strong positive correlation with FFB productivity (r = 0.95; T-count = 9.34) and a very strong negative correlation with fire caterpillar attack intensity (r = 0.98; T-count = 12.96), indicating that higher rainfall suppressed pest population growth. Furthermore, pest attack intensity had a very strong negative correlation with FFB productivity (r = 0.97; T-count = 9.83). The small sample size (n = 5) constrains statistical power and limits causal inference; results should be interpreted as descriptive associations. Nevertheless, findings suggest that rainfall monitoring could support early warning systems for pest outbreaks and inform integrated pest management strategies for oil palm plantations.
Daily Living Activity Improvement After William Flexion Exercise in Low Back Pain Patients Nyoman Tri Karisma Dewa; Anak Agung Ayu Niti Wedayani; Mukaddam Alaydrus; Emmy Amalia
Jurnal Biologi Tropis Vol. 26 No. 3 (2026): Juli - September
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.v26i3.12230

Abstract

Low Back Pain (LBP) is a leading cause of functional limitation, often impairing Activities of Daily Living (ADL). Evidence regarding ADL outcomes following combination physiotherapy in Indonesian hospital settings remains limited. This study evaluated the effect of William Flexion Exercise (WFE) combined with physiotherapy modalities on ADL among LBP patients at Mataram University Hospital. A quantitative quasi-experimental one-group pretest–posttest design was conducted with 11 participants recruited through consecutive sampling. ADL was assessed using the validated Barthel Index and analyzed using descriptive statistics and the McNemar test. Before intervention, all participants (100%) were categorized as having mild dependence. After combination therapy administered twice weekly for four weeks, eight participants (72.7%) achieved independence, while three (27.3%) remained mildly dependent. Statistical analysis demonstrated a significant improvement in ADL following the intervention (McNemar, p = 0.008). These findings suggest that WFE combined with physiotherapy modalities may improve functional independence in LBP patients. However, the small sample size and absence of a control group limit causal inference and generalizability. Further randomized controlled studies with larger samples are recommended to confirm these findings.
The Correlation Between Working Period and Total Immunoglobulin E (IgE) in Textile Industry Workers Putri, Winanti Wahyuning; Saktiningsih, Hari
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.v26i2.12233

Abstract

Exposure to chemical substances in the textile industry may cause occupational health problems, particularly allergic and immunological disorders mediated by Immunoglobulin E (IgE). Prolonged exposure to textile chemicals can increase the risk of allergic sensitization, which is characterized by elevated total IgE levels in the blood. This study aimed to determine the relationship between work duration and total Immunoglobulin E (IgE) levels among textile industry workers. This study used an analytical observational method with a cross-sectional design. A total of 15 textile industry workers who met the inclusion and exclusion criteria were included as respondents. Data on work duration were obtained through interviews, while total IgE levels were measured by laboratory examination using the Electrochemiluminescence Immunoassay method. Data analysis was performed using the Spearman correlation test with a significance level of p < 0.05. The results showed a significant relationship between work duration and total IgE levels (p < 0.001) with a very strong positive correlation (r = 0.943). Workers with longer work duration tended to have higher total IgE levels. In conclusion, work duration is significantly associated with increased total IgE levels as an indicator of allergic immune response in textile industry workers.
Nocturnal Insect Diversity in Budeng Mangrove Forest, Jembrana, Bali Nadia Handayani; I Made Oka Riawan; Moh Jafron Syah; Edgar Bernal
Jurnal Biologi Tropis Vol. 26 No. 3 (2026): Juli - September
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.v26i3.12243

Abstract

The mangrove ecosystem in Budeng Village plays an important ecological role, yet information on nocturnal insect diversity remains limited. This study aimed to identify the species composition and analyze the diversity of nocturnal insects in the Budeng Village mangrove forest. An exploratory study was conducted using light traps. A total of 1.900 individuals representing 8 orders, 17 families, and 19 species were recorded. The diversity (0.550), species richness (2.384), and evenness (0.186) indices were low, whereas the dominance index was high (0.801) due to the predominance of Phlebotomus sp. (1.700 individuals). Overall, the nocturnal insect community showed low diversity and high species dominance. These findings provide baseline data for biodiversity monitoring and support the potential use of nocturnal insects as bioindicators of mangrove ecosystem condition.
Diversity of Gastropoda in the Intertidal Zone of Tanjung Pinggir Beach, Batam City Ramadani Fitra; Witri Winanda; Wardatul Aini; Khairul Anwar; Mona Fathia; Hansen Fandy Winata
Jurnal Biologi Tropis Vol. 26 No. 3 (2026): Juli - September
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.v26i3.12245

Abstract

The intertidal zone is a coastal ecosystem with high biological productivity that supports various benthic organisms, including gastropoda. Increasing anthropogenic activities in coastal areas may influence the composition and community structure of gastropoda as ecological indicators. This study aimed to analyze the species composition, density, and community structure of gastropoda in the intertidal zone of Tanjung Pinggir Beach, Batam City. The research was conducted in April 2026 using a survey method with line transect–quadrat techniques at five sampling stations. We laid out a single, 50-m long transect perpendicular to the shoreline at each site. Quadrats were placed every 10 m along this line, which resulted in five sampling units per station (n = 6 quadrats).  Gastropod samples were identified morphologically, while data analyses included species composition, density, diversity index, evenness index, and dominance index. The results showed that 42 gastropod species belonging to 5 orders and 17 families were identified, with Caenogastropoda and Neogastropoda as the dominant orders. The highest gastropod density was recorded at Station 4 (5.88 ind./m²), while the lowest was found at Station 1 (0.96 ind./m²). Relative density analysis indicated that Batillaria zonalis and Batillaria attramentaria were the dominant species across most stations. Diversity and evenness indices were categorized as moderate to high, whereas the dominance index was low, indicating a relatively stable community structure. Overall, the intertidal ecosystem of Tanjung Pinggir Beach remains ecologically supportive for gastropod communities. Sustainable coastal management is recommended to minimize future anthropogenic pressures.
The Relationship Between Family Sanitation and Stunting (A Case Study in the Ampenan District, Mataram City) Pratama, Lalu Galih Putra; Suripto, Suripto; Ernawati, Ernawati
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.v26i2.12246

Abstract

A densely populated urban area with slum areas, such as Ampenan District, Mataram City, has a risk of worsening sanitation and nutritional status of toddlers. This study aimed to determine the effect of family sanitation on the incidence of stunting in Ampenan District. A total of 99 toddlers and their families were taken as samples through purposive sampling. Stunting data was collected through the PPGBM electronic document review technique from community health centers in Ampenan District. Sanitation data was collected through interviews with the families of the toddlers. The test of the relationship between sanitation and stunting was approached using regression analysis. The prevalence of stunting in Ampenan District is relatively low (6.03%), with the highest vulnerability in toddlers aged 25–36 months. Family sanitation (X) had a significant positive effect on the nutritional status (Z-score) of toddlers (Y), with the model Y = -7.4532 +0.0744 X. The implication is, to target stunting prevention (Z score >-2) in Ampenan, the sanitation score must be >73.3.
Intensity of Uret Pest Attacks and Results Sweet Potato Harvest Purpel (Ipomea batatas L.) Harvest Yields on Several Types of Mulch Putri, Dita Dwi; Supeno, Bambang; Sudharmawan, A. A. K.
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.v26i2.12248

Abstract

Sweet potato (Ipomoea batatas L.) is an important food commodity in Indonesia and is widely used as an alternative carbohydrate source. This study aims to determine the effect of several types of mulch on the intensity of wireworm attacks and sweet potato (Ipomoea batatas L.) yield. The research method used was an experimental field trial. The experiment was designed with RAK (Randomized Block Design), with three treatments. The treatments were without mulch (K0), black silver plastic mulch (K1), and straw mulch (K2). The results of the study found two species of wireworm pests, namely Phyllophaga sp. and Leucopholis sp. The highest attack intensity was obtained in the K2 treatment at 33.42%, followed by K1 at 28.08%, and the lowest in K0 at 23.10%, but not statistically significantly different. The highest tuber yield was obtained in the K0 treatment at 2,129 g per treatment. Regression analysis showed a negative relationship between attack intensity and tuber yield with an R² value of 0.6801.
Vegetation Ecostructure in the Mejet Community Forest Conservation Block, North Lombok Regency Wirebakti, Lalu Gede Galuh; Valentino, Niechi; Anwar, Hairil
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.v26i2.12253

Abstract

The Mejet HKm Protection Block plays a crucial role as a water catchment area and supports the livelihoods of the surrounding community. This area serves as a water source for domestic needs, agricultural irrigation, and supports the growing ecotourism activities in the surrounding area. This study aimed to determine the ecostructure of plant vegetation in the Mejet Community Forest Protection Block, including species composition, horizontal and vertical structures, and the Importance Value Index (IVI), as well as the diversity, evenness, and richness indices of plant species. The research method used grid lines with a systematic sampling technique with random origins. Vegetation data were categorized based on the growth stage of seedlings, saplings, poles, and trees. The results showed that there were 95 plant species with Coffea sp. as the species with the largest number of individuals. The horizontal vegetation structure was dominated by small to medium diameter classes, while the vertical structure was dominated by low height classes, indicating that the vegetation regeneration process was still active. The highest IVI value at the seedling and sapling levels was held by Brownlowia peltata, at the pole level by Tabernaemontana, and at the tree level by Palaquium obtusifolium. The highest species diversity index value at the tree level was 3.69. The evenness and species richness indices across growth strata were also high, indicating a relatively even distribution of individuals across species and a stable forest ecosystem. Overall, the vegetation in the Mejet HKm Protection Block reflects a diverse, stable, and regenerative plant community, which supports the sustainable ecological function of the forest area.
Types of Asteraceae Plants in the Palangka Raya University Area (Indonesia) Umi Novita Fitriah; Ria Windi Lestari
Jurnal Biologi Tropis Vol. 26 No. 3 (2026): Juli - September
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.v26i3.12255

Abstract

The Universitas Palangka Raya (UPR) campus, located adjacent to the Sebangau National Park, contains extensive green open spaces that support diverse plant communities, including the Asteraceae family. However, information regarding its diversity and potential utilization remains limited. This study aimed to inventory and identify Asteraceae species and describe their habitat distribution and potential uses within the UPR campus. An exploratory descriptive study with a field floristic approach was conducted from October 2025 to June 2026 using the exploration (cruise) method and purposive sampling. Species identification was based on morphological characteristics and validated using botanical references and the Plants of the World Online (POWO) database. A total of 10 Asteraceae species representing 10 genera were identified. Introduced species dominated the flora (80%), while native species accounted for only 20%. Most taxa occurred in disturbed habitats, including roadsides, drainage areas, agricultural fields, shrubs, and peatland transition zones. Several introduced species, including Praxelis clematidea, Chromolaena odorata, and Mikania micrantha, were identified as invasive weeds with allelopathic properties that may threaten native vegetation. Despite their invasive potential, Asteraceae species also possess significant economic and ecological value, including antioxidant, antibacterial, anti-inflammatory, and larvicidal properties, as well as applications as green manure and erosion-control ground cover. These findings provide baseline data for biodiversity management, invasive species monitoring, and the sustainable utilization of Asteraceae resources within the UPR campus.
Colonization of Actinomycetes Encapsulates in The Rhizosphere of Cultivated Plants Dama, Dewi Rahayu; Retnowati, Yuliana; Kandowangko, Novri Youla; Katili, Abubakar Sidik; Ahmad, Jusna
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.v26i2.12258

Abstract

The growth of cultivated plants is often hampered by soil degradation due to excessive use of chemical inputs. The use of microorganisms such as actinomycetes offers an environmentally friendly alternative, but its appli cation is still limited due to its low viability in the field. This study aims to analyze the colonization ability of encapsulated actinomycetes on the roots of cultivated plants, focusing on parameters such as the ability to infect root tissue, and the ability to induce growth in cultivated plants. Actinomycete isolates were obtained from the rhizosphere of maize plants that exhibit PGPR activity. This study was conducted quantitatively with a descriptive approach. This study used treatments with and without inoculation of encapsulated actinomycetes on maize (Zea mays var. ceratina) and cocoa (Theobroma cacao) plants. The results showed that encapsulated actinomycetes were able to colonize the root systems of maize and cocoa plants, as indicated by the presence of actinomycete filamentous structures on the root surface and within the root tissue. Inoculation with encapsulated actinomycetes induced growth in both plant species, as demonstrated by improvements in all growth parameters. Encapsulated actinomycetes have the potential to be effective biological agents for enhancing plant growth and provide an environmentally friendly technological alternative to support sustainable agriculture.

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