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All Journal AQUATIC SCIENCE & MANAGEMENT JURNAL PESISIR DAN LAUT TROPIS JURNAL ILMIAH PLATAX
Mamuaja, Jane M.
Sam Ratulangi University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Environmental Science

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Journal : JURNAL ILMIAH PLATAX

 1 
Effect Of Lead Acetate (Pb(Ch3coo)2) On The Growth Of Marine Microalgae Porphyridium cruentum Sanep, Jacqlien Virgina; Kemer, Kurniati; Mantiri, Desy M. H.; Paulus, James J. H.; Mamuaja, Jane M.; Tombokan, John L.
Jurnal Ilmiah Platax Vol. 11 No. 1 (2023): ISSUE JANUARY-JUNE 2023
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v11i1.47538

Abstract

Microalgae are a group of phytoplankton that live in waters and in damp places; Microscopic in size and can only be seen with a microscope. The stages of microalgae growth are started with the lag phase, the exponential phase, the growth rate decreasing phase, the stationary phase, and the death phase. Porphyridium cruentum is a single-celled microalgae, belonging to the class Rhodophyceae, free-living or in colonies bound in mucilago. The purpose of this study was to observe the growth of the marine microalgae Porphyridium cruentum in culture media treated with lead acetate at different concentrations, namely 30 ppm, 50 ppm, 80 ppm, and control. Observation of cell growth was carried out by counting the number of cells every day, at the same time until Porphyridum cruentum entered the death phase. The cell density of Porphyridium cruentum marine microalgae showed a good growth pattern where until day 11 the average number of microalgae cells was 9.8 x104. Furthermore, the culture media was treated with lead acetate in different concentrations. Cell density with lead acetate treatment can affect the growth of Porphyridium cruentum. Keywords : Microalgae; Porphyridium cruentum; Lead Acetate Abstrak Mikroalga adalah kelompok fitoplankton yang hidup di perairan dan di tempat yang lembab; berukuran mikroskopis dan hanya bisa dilihat menggunakan mikroskop. Tahapan pertumbuhan mikroalga adalah dimulai dari fase lag, fase eksponensial, fase penurunan laju pertumbuhan, fase stasioner dan fase kematian. Porphyridium cruentum merupakan mikroalga bersel tunggal, termasuk kelas Rhodophyceae, hidup bebas atau berkoloni yang terikat dalam mucilago. Tujuan dari penelitian ini adalah mengamati pertumbuhan dari mikroalga laut Porphyridium cruentum pada media kultur dengan perlakuan timbal asetat pada konsentrasi berbeda yaitu 30 ppm, 50 ppm, 80 ppm dan kontrol. Pengamatan pertumbuhan sel dilakukan dengan menghitung jumlah sel setiap hari, pada waktu yang sama sampai Porphyridum cruentum memasuki fase kematian. Kepadatan sel mikroalga laut Porphyridium cruentum menunjukkan pola pertumbuhan yang baik dimana sampai hari ke 11 jumlah rata-rata sel mikroalga 9,8 x104. Selanjutnya media kultur diberi perlakuan timbal asetat dengan konsentrasi berbeda. Kepadatan sel dengan perlakuan timbal asetat dapat mempengaruhi pertumbuhan Porphyridium cruentum. Kata kunci: Mikroalga;  Porphyridium cruentum; Timbal Asetat
Benthic Foraminifera Composition in Coral Reef Areas at Malalayang Beach Waters Alam, Muhammad Reza Sinar; Mamuaja, Jane M.; Windarto, Agung B.; Mantiri, Rose O. S. E.; Schaduw, Joshian N. W.
Jurnal Ilmiah Platax Vol. 12 No. 2 (2024): ISSUE JULY-DECEMBER 2024
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v12i2.51386

Abstract

Malalayang Beach is part of the coastal area of Manado Bay and is situated in the North Sulawesi Province of Indonesia. The coral reef ecosystem is one of the coastal ecosystems with high biodiversity. The uniqueness of the ecosystem and the diversity of its organisms make coral reef ecosystems have high social, ecological, and economic values. In 1998, the Environmental Protection Agency (EPA) of the United States recommended the use of foraminifera as indicators for aquatic assessments. Foraminifera is a meiobenthic components at the bottom of the sea that act as producer of calcium carbonate (CaCO3) in sediments in the benthic and pelagic zones of the sea. The purpose of this study was to study at the composition of benthic foraminifera based on their genus in the waters of Malalayang Beach and also assess the condition of coral reef waters on Malalayang Beach using the FoRAM Index. This research was carried out by taking sediment samples in Malalayang Beach in nine sampling points at a depth of 5–8.5 m. The samples were then washed and sorted to obtain foraminifera tests. From 2,830 successfully identified specimens, 17 genera were obtained with FoRAM index values ranging from 5.46 to 9.53. The average value of the FoRAM Index at Malalayang Beach is 7.32, indicating that the waters of Malalayang Beach are still suitable for coral growth. Keywords: Malalayang Beach, Foraminifera, Coral Reef, FoRAM Index Abstrak Pantai Malalayang adalah bagian dari Teluk Manado yang terletak di Sulawesi Utara, Indonesia. Ekosistem terumbu karang merupakan salah satu ekosistem pesisir dengan biodiversitas yang tinggi. Keunikan ekosistem serta keragaman organismenya menjadikan ekosistem terumbu karang memiliki nilai sosial, ekologi dan ekonomi yang tinggi. Environmental Protection Agency (EPA) dari Amerika Serikat menyarankan penggunaan foraminifera sebagai indikator penilaian perairan pada tahun 1998. Foraminifera merupakan komponen meiobentik di dasar perairan yang berperan sebagai penghasil kalsium karbonat (CaCO3) pada sedimen yang ada di zona bentik dan pelagis laut. Tujuan penelitian ini adalah untuk mempelajari komposisi foraminifera bentik berdasarkan genusnya pada perairan Pantai Malalayang dan juga menilai kondisi perairan terumbu karang di Pantai Malalayang menggunakan Indeks FoRAM. Penelitian ini dilakukan dengan cara mengambil sampel sedimen di perairan Pantai Malalayang pada sembilan titik pengambilan sampel dengan kedalaman 5 - 8,5 m. Selanjutnya sampel dicuci dan disortir untuk mendapatkan cangkang foraminifera. Dari sejumlah 2830 spesimen yang berhasil diidentikasi, diperoleh sebanyak 17 genus dengan nilai indeks FoRAM berkisar dari 5,46 -  9,53. Nilai rata-rata indeks FoRAM pada Pantai Malalayang adalah 7,32 dan ini mengindikasikan bahwa perairan Pantai Malalayang masih baik dan layak untuk pertumbuhan karang. Kata Kunci : Pantai Malalayang, Foraminifera, Terumbu Karang, Indeks FoRAM
Study of Sea Water Quality in Malalayang Beach Walk Area Windarto, Firhansyah C.; Rumampuk, Natalie D.C.; Mamuaja, Jane M.; Rampengan, Royke M.; Schaduw, Joshian N. W.; Manengkey , Hermanto W.K.
Jurnal Ilmiah Platax Vol. 12 No. 1 (2024): ISSUE JANUARY-JUNE 2024
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v12i1.54144

Abstract

The city of Manado is famous for its fishery products, but human activities also cause problems of seawater pollution and a decrease in water quality. This study aims to examine the water quality around Malalayang Beach Walk in Manado City with a focus on physical and chemical parameters. The study was conducted at five stations with three repetitions at high and low tide. The results showed that the water temperature was relatively homogeneous, with a range of 30.02-30.29oC at high tide and 30.39-30.81oC at low tide. Turbidity is in the range of 20.1-22.5 NTU at high tide and 16.0-21.7 NTU at low tide, exceeding the quality standard. DO values conform to quality standards (5.46-8.07 mg/L at high tide and 5.69-6.32 mg/L at low tide), but TDS reaches 23900-28600 mg. L at high tide and 26600-28600 mg/L at low tide, far from the common values of 1500 mg/L. Salinity values range from 25.02-30.29 ppt at high tide and 30.35-30.50 ppt at low tide. Pollution and degradation need to be better controlled and monitored. Keywords: Water quality, Temperature, Turbidity, Dissolved oxygen (DO), Total dissolved solids (TDS), Salinity. Abstrak Kota Manado terkenal dengan hasil perikanannya, namun aktivitas manusia juga menyebabkan masalah pencemaran air laut dan penurunan kualitas perairan. Penelitian ini bertujuan untuk mengkaji kualitas perairan di sekitar Malalayang Beach Walk Kota Manado dengan fokus pada parameter fisika dan kimia. Penelitian dilakukan di lima stasiun dengan tiga kali pengulangan pada saat air pasang dan surut. Hasil penelitian menunjukkan bahwa suhu perairan relatif homogen, dengan rentang nilai 30,02-30,29oC saat pasang dan 30,39-30,81oC saat surut Kekeruhan berada pada rentang 20,1-22,5 NTU saat pasang dan 16,0-21,7 NTU saat surut, melebihi standar baku mutu. Nilai DO sesuai dengan standar baku mutu (5,46-8,07 mg/L saat pasang dan 5,69-6,32 mg/L saat surut), namun TDS mencapai 23900-28600 mg/L saat pasang dan 26600-28600 mg/L saat surut, jauh dari nilai umum 1500 mg/L. Nilai salinitas berkisar antara 25,02-30,29 ppt saat pasang dan 30,35-30,50 ppt saat surut. Pencemaran dan penurunan kualitas perlu dikendalikan dan dipantau secara lebih baik. Kata Kunci: Kualitas air, Suhu, Kekeruhan, Dissolved oxygen (DO), Total dissolved solids
Co-Authors Agung B. Windarto, Agung B. Alam, Muhammad Reza Sinar John L. Tombokan Joshian N.W. Schaduw Kurniati Kemer Lindon R Pane Mandagi, Stephanus V. Manengkey , Hermanto W.K. Mantiri, Desy M. H Maramis, Regina U. Markus T. Lasut Medy Ompi Natalie D Rumampuk Pane, Lindon R. Paringgi, Ezra Paulus, James J. H. Rampengan, Royke Rembet, Unstain Roeroe, Kakaskasen Andreas Rose O. S. E. Mantiri, Rose O. S. E. Royke M. Rampengan Rumampuk, Natalie D.C Sanep, Jacqlien Virgina Undap, Suzanne J Veibe Warouw Wilmy E Pelle Windarto, Firhansyah C.