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All Journal Jurnal Ilmu Kelautan Spermonde Jurnal Sains & Teknologi Lingkungan
Samawi, Muh Farid
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Computer Science & IT Earth & Planetary Sciences Education

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SPATIAL DISTRIBUTION AND STRUCTURE OF PHYTOPLANKTON COMMUNITIES THAT HAVE THE POTENTIAL TO CAUSE HARMFUL ALGAE BLOOMS (HABS) IN THE WATERS OF LAIKANG BAY, SOUTH SULAWESI Trimurti, Fadilla; Tambaru, Rahmadi; Hatta, Muh.; Samawi, Muh Farid; Rani, Chair
Jurnal Ilmu Kelautan SPERMONDE VOLUME 10 NUMBER 2, 2024
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/jiks.v10i2.19515

Abstract

The presence of nutrients such as nitrate and phosphate can have a positive impact on phytoplankton growth. However, if the nutrient concentration is very high in the waters, it can cause an explosion in the phytoplankton population or Harmful Algae Blooms (HABs) in the waters. Phytoplankton explosions in waters have a negative impact on the surrounding ecosystem, marine biota, and humans. This research aimed to analyze the spatial distribution and structure of phytoplankton communities that can potentially cause HABs in the waters of Laikang Bay, South Sulawesi. This research was conducted in June 2021. The research found 20 species of phytoplankton HABs from 2 classes, namely Bacillariophyceae (8 types) and Dinophyceae (12 species). The Bacillariophyceae class has a higher percentage, 93%, and Dinophyceae at 7%. The abundance status of phytoplankton HABs is classified as not blooming, with the highest abundance found at Station 4 (control), namely 210 ± 80 cells/L. The HABs phytoplankton diversity index (H') is moderate with a value of 1.576 – 2.332, the uniformity index (E) of Station 1 (west) and Station 4 (control) is moderate with a value of 0.568 and 0.582 while Station 2 (north) and Station 3 (south) is classified as high, namely 0.807 and 0.823, the dominance index (D) is classified as low with a value of 0.135 – 0.357. Spatially, phytoplankton HABs based on the station can be divided into five groups. The results of the PCA analysis show that substations 1.A, 1.B, 1.C, 2.A, 2.B, and 2. C are characterized by high temperature and salinity parameters. Substations 3.A, 3.B, and 3.C are characterized by high nitrate and phosphate parameters. Meanwhile, substations 4.A, 4.B, and 4.C are characterized by high parameters of brightness, current speed, and pH and are associated with a high abundance of phytoplankton HABs.  
ANALISIS KELAYAKAN NUTRIEN ANORGANIK JENIS N, P, DAN Si UNTUK KEHIDUPAN FITOPLANKTON DI PERAIRAN PESISIR TOMPOTANA TAKALAR SULAWESI SELATAN Tambaru, Rahmadi; Haris, Abdul; Samawi, Muh Farid; Luthfiyah, Ilmiyanti Aulya
Jurnal Sains & Teknologi Lingkungan Vol. 15 No. 1 (2023): SAINS & TEKNOLOGI LINGKUNGAN
Publisher : Teknik Lingkungan Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/jstl.vol15.iss1.art5

Abstract

Jenis nutrien anorganik seperti nitrat (N), fosfat (P), dan silikat (Si) banyak diserap oleh fitoplankton. Ketiga jenis nutrien itu sangat penting untuk pertumbuhannya. Melalui proses fotosintesis, ketiga nutrien itu dirubah menjadi cadangan makanan dalam bentuk senyawa-senyawa organik seperti karbohidrat. Hasil proses fotosintesis digunakan organisme lainnya dalam tropik level untuk bertumbuh. Tujuan penelitian ini adalah menganalisis distribusi nutrien anorganik jenis N (nitrat), P (fosfat), dan Si (silikat) untuk kehidupan fitoplankton. Pelaksanaan penelitian pada bulan Juni sampai Oktober 2021 pada tiga stasiun di perairan pesisir Tompotana, Kecamatan Kepulauan Tanakeke, Kabupaten Takalar, Sulawesi Selatan. Pada ketiga stasiun itu, dilakukan pengambilan sampel air untuk keperluan identifikasi fitoplankton dan pengukuran parameter fisika-kimia perairan. Kegiatan yang dilaksanakan di laboratorium seperti identifikasi fitoplankton, pengukuran nitrat, fosfat dan silikat. Berdasarkan analisis varians, konsentrasi nitrat dan fosfat adalah tidak signifikan berbeda (p > 0.05) antara stasiun, sebaliknya konsentrasi silikat justru berbeda secara signifikan (p < 0.05). Nutrien jenis N, P, dan Si masih dapat diserap dan digunakan oleh fitoplankton untuk bertumbuh walau tidak optimal. Sebanyak 4 kelas dan 24 jenis fitoplankton teridentifikasi. Empat kelas yang dimaksud yaitu Bacillariophyceae, Dinophyceae, Cyanophyceae, dan Coscinodiscophyceae. Dari hasil analisis korelasi Pearsons, hanya nitrat yang berpengaruh secara signifikan terhadap kelimpahan fitoplankton di perairan Tompotana (p<0.05).
Co-Authors Abdul Haris Luthfiyah, Ilmiyanti Aulya Muh. Hatta Rahmadi Tambaru Trimurti, Fadilla