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All Journal Jurnal Biologi Tropis Acta Solum
Putra, Guruh Mayka
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology

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Vegetation Diversity in the Mangrove Ecosystem of Jorong District, Tanah Laut Regency Hartanto, Delon Tri; Putra, Guruh Mayka; Rizalli, Akhmad
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.10845

Abstract

Mangrove ecosystems play a crucial role in maintaining coastal environmental stability and supporting biodiversity in tropical regions. This study aims to analyze the diversity, structure, and dominance of mangrove vegetation in Jorong District, Tanah Laut Regency, South Kalimantan, as a scientific basis for sustainable mangrove management. The research was conducted in September 2025 in the mangrove forests of Muara Asam-Asam and Swarangan Villages using a purposive sampling method combined with transect plots. Vegetation data were collected at three growth levels, namely seedlings, saplings, and trees, through nested plots of different sizes. Vegetation analysis included species density, relative density, frequency, relative frequency, Important Value Index (IVI), and species diversity using the Shannon-Wiener index. The results showed that three mangrove species were identified, namely Avicennia marina, Rhizophora apiculata, and Sonneratia alba. Avicennia marina was the most dominant species across all forest density categories, as indicated by its high IVI values. The Shannon-Wiener diversity index revealed moderate diversity in high-density mangrove forests (H’ = 1.09) and lower diversity in medium (H’ = 0.66) and low-density forests (H’ = 0.63). These variations are influenced by habitat conditions and anthropogenic pressures such as land conversion and logging activities. Overall, the mangrove ecosystem in Jorong District still exhibits sufficient ecological diversity but requires sustainable management to prevent further degradation and ensure long-term ecosystem stability.
Identification of Mangrove Plants with Medicinal Potential in Muara Kintap Village Tanah Laut Regency Safitri, Adinda Ayu; Putra, Guruh Mayka; Rizali, Akhmad
Jurnal Biologi Tropis Vol. 26 No. 1 (2026): 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.v26i1.11100

Abstract

Indonesia has the largest mangrove area in the world with high biodiversity potential, including in Muara Kintap Village, Tanah Laut Regency. Mangroves function not only ecologically but also hold medical potential as raw materials for biopharmaceuticals due to their bioactive compound content. This research aims to identify and document mangrove species with potential as herbal medicine ingredients in the mangrove ecosystem of Muara Kintap Village. The study was conducted in September 2025 using purposive observation and the cruising method for primary data collection, supplemented by a systematic literature review for secondary data. The results identified five major species with medicinal potential: Avicennia marina, Sonneratia alba, Avicennia officinalis, Rhizophora apiculata, and Nypa fruticans. The leaves are the most dominant organ with pharmacological potential across all identified species. Secondary metabolite compounds found include flavonoids, tannins, saponins, steroids, and terpenoids, which function as antibacterial, antioxidant, anti-inflammatory, and anticancer agents. This documentation is expected to serve as a foundation for developing herbal-based health products while supporting mangrove conservation efforts in coastal areas.
Unveiling the BPF9 Isolate as a Potential of Phosphate-Solubilizing Bacteria Through In Vitro Characterization Putri, Devanda Ayu Lidya Permata; Putra, Guruh Mayka; Sahana, Laudy Arrisa Arumsari; Nirmalasari, Intan
Acta Solum Vol. 3 No. 3 (2025): Juli 2025
Publisher : Department of Soil, Faculty of Agriculture, Lambung Mangkurat University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/actasolum.v3i3.3329

Abstract

The increasing demand for food has driven agricultural intensification, particularly through the use of phosphate fertilizers. However, phosphorus uptake efficiency by plants remains low due to its predominance in insoluble forms in the soil. One promising alternative is the use of phosphate-solubilizing bacteria (PSB). This study aimed to evaluate the solubilization potential of the BPF9 isolate through qualitative and quantitative assays, as well as growth curve profiling. The research was conducted at the Soil and Environmental Biotechnology Laboratory, IPB University. Qualitative phosphate solubilization was assessed on Pikovskaya agar by measuring halo zone formation to calculate the solubilization index (SI). Quantitative analysis was carried out using spectrophotometry at 660 nm. The bacterial growth curve was analyzed using the haemocytometer method. Results showed that BPF9 had a solubilization index of 2.0 (moderate category) and was able to solubilize phosphate up to 128.5 ppm, which is considered highly efficient. The growth curve indicated that BPF9 entered the exponential phase at 26 hours and reached its maximum population at 42 hours. These findings indicate that BPF9 possesses strong phosphate-solubilizing capability and stable growth characteristics, making it a promising candidate for biofertilizer development.
Co-Authors Akhmad Rizali Devanda Ayu Lidya Permata Putri Hartanto, Delon Tri INTAN NIRMALASARI Rizalli, Akhmad Safitri, Adinda Ayu Sahana, Laudy Arrisa Arumsari