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All Journal Jurnal Biologi Tropis Jurnal Laot Ilmu Kelautan
Aryani, Komang Putri
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Immunology & microbiology

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Potential of Red Algae Eucheuma cottoni as Antibacterial to Pseudomonas aeruginosa Tiarani, Yesha Ibanez; Susanti, Oktora; Siwi, Galuh Praka; Kurniawan, Muhammad Nurwenta; Aryani, Komang Putri; Ramadhani, Nia; Ghyffary, Moch. Dhaffa Abudhzar; Lasmono , Arsyah Poetra; Safitri, Tiara; Tamaulina, Salsabila; Putri, Wanda Andella
Jurnal Biologi Tropis Vol. 25 No. 1 (2025): 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.v25i1.8272

Abstract

Eucheuma cottonii is one type of macroalgae that has been widely cultivated. Potential resources that can be developed is the use of macroalgae as antibacterial. Bioactive compounds in Eucheuma cottonii namely alkaloids, flavonoids, terpenoids, tannins, and saponins can be utilized as antibacterials. This study aims to see the antibacterial activity of Eucheuma cottoni seaweed extract against Pseudomonas aeruginosa bacteria using the disc diffusion method. The test was conducted from October 7 to December 14, 2024, at the Aquatic Productivity Laboratory, and Oceanography Laboratory, Marine Science study program, Department of Fisheries and Marine, Faculty of Agriculture, University of Lampung. Samples were taken from Lontar Village, Tirtayasa District, Serang Regency, Banten Province. Dilution of Eucheuma cottonii extract with a concentration of 10,000 ppm 5,000 ppm, 1000 ppm, 100 ppm and 10 ppm. The variable observed was the magnitude of the inhibition zone of Eucheuma cottoni against Pseudomonas aeruginosa bacteria. The results showed that Eucheuma cottonii extract had weak antibacterial activity, with the highest inhibition zone of 13.93 mm at a concentration of 10,000 ppm. This study shows that Eucheuma cottonii extract is only effective in inhibiting the growth of Pseudomonas aeruginosa bacteria in the first 48 hours. Further research is needed to improve the effectiveness of this extract as a natural antibacterial agent.  
Analisis Pengaruh ENSO Terhadap Variabilitas Konsentrasi Klorofil-A di Perairan Selat Bali Hidayat, Rahma Nurhasna Safetya; Nazarudin, Ahmad Abdel Nazarudin; Siwi, Galuh Praka Siwi; Aryani, Komang Putri; Safira, Anggi; Putra, Muhamad Gilang Arindra
Jurnal Laot Ilmu Kelautan Vol 8, No 1 (2026): Jurnal Laot Ilmu Kelautan
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jlik.v8i1.13258

Abstract

El Niño-Southern Oscillation (ENSO) merupakan penggerak utama variabilitas oseanografi di wilayah tropis, termasuk Selat Bali. Penelitian ini menganalisis pengaruh ENSO terhadap variabilitas Suhu Permukaan Laut (SPL) dan klorofil-a dengan membandingkan fase El Niño Super (2015) dan Triple-Dip La Niña (2022). Data bersumber dari Copernicus Marine Service menggunakan parameter Global Ocean OSTIA SST dan Global Ocean Surface Chlorophyll beresolusi spasial 0,041° dengan resolusi temporal bulanan. Analisis spasial dan temporal menggunakan Ocean Data View (ODV) versi 4.6.5. menunjukkan bahwa fase El Niño 2015 memicu anomali SPL dingin (26°C–27,5°C) dan kenaikan klorofil-a (1,0–1,5 mg/m³), yang mengindikasikan penguatan mekanisme upwelling. Sebaliknya, fase La Niña 2022 didominasi SPL hangat (30°C–31°C) dan klorofil-a rendah (<0,5 mg/m³) akibat hambatan upwelling dan akumulasi massa air hangat di Pasifik Barat. Perbedaan kuantitatif yang signifikan ini menegaskan sensitivitas produktivitas primer Selat Bali terhadap fase ekstrem ENSO, yang menjadi parameter penting dalam manajemen sumber daya perikanan regional.
Co-Authors Ghyffary, Moch. Dhaffa Abudhzar Hidayat, Rahma Nurhasna Safetya Kurniawan, Muhammad Nurwenta Lasmono , Arsyah Poetra Nazarudin, Ahmad Abdel Nazarudin Putra, Muhamad Gilang Arindra Putri, Wanda Andella Ramadhani, Nia Safira, Anggi Safitri, Tiara Siwi, Galuh Praka Siwi, Galuh Praka Siwi Susanti, Oktora Tamaulina, Salsabila Tiarani, Yesha Ibanez