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

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Identification of Rhizospheric Bacterial Diversity in Mangrove Ecosystems in Tanah Laut Regency Nisrina Ramadhani; Guruh Mayka Putra; Akhmad Rizali
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.v26i2.11879

Abstract

Mangrove ecosystem is rich in rhizosphere bacteria that support the nutrient cycle and environmental balance. This study aims to identify the diversity of rhizosphere bacteria from mangrove soils in Tanah Laut Regency, South Kalimantan. Samples were taken from three types of mangrove density tight, medium, and rare, at depths of 0-30 cm and 30-60 cm. Tiered dilution to level 10-8, dilution level 10-5 to 10-8 are inoculated on NA media and purified. The purification results obtained a total of 29 isolats, in the dense mangrove type there were 14 isolats, medium mangroves 8 isolats, and rare mangroves 7 isolats. Morphological analysis showed macroscopic variation with round, entire, undulate, and irregular colony margins. There are white, yellow, beige, and orange colors. Elevation consists of flat, raised, to convex. The size of the colony is small to moderate. Microscopic analysis based on the results of gram staining there are groups with positive and negatif grams, in the form of coccus cells, bacillus, and coccobacillus. Growth assays on pH 3, 5, 7, and 9 indicated optimal growth at pH 7, with strong inhibition at pH 3. These results confirm that there is a high level of diversity of mangrove rhizosphere bacteria.
Identification of Mangrove Plants with Medicinal Potential in Muara Kintap Village Tanah Laut Regency Adinda Ayu Safitri; Guruh Mayka Putra; Akhmad Rizali
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.
Co-Authors Adinda Ayu Safitri Akhmad Rizali Nisrina Ramadhani