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All Journal Jurnal Biodjati Jurnal Laut Khatulistiwa
Kushadiwiojayanto, Arie Antasari
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Earth & Planetary Sciences Energy Physics

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Pemetaan Batimetri di Pelabuhan Perikanan Nusantara (PPN) Pemangkat Kabupaten Sambas Kalimantan Barat Maulana, Agung Lan; Kushadiwiojayanto, Arie Antasari; Muliadi, Muliadi
Jurnal Laut Khatulistiwa Vol 7, No 1 (2024): February
Publisher : Dept. Marine Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/lkuntan.v7i1.64307

Abstract

Pelabuhan Perikanan Nusantara (PPN) Pemangkat terletak di Kota Pemangkat, Kabupaten Sambas, Kalimantan Barat merupakan pelabuhan yang berperan dalam pengembangan usaha perikanan serta sektor perekonomian di Kecamatan Pemangkat. Pendangkalan akibat sedimentasi pada suatu perairan dapat menyebabkan terganggunya alur pelayaran serta membahayakan aktivitas bongkar muat kapal-kapal di PPN Pemangkat. Penelitian ini bertujuan untuk menggambarkan kondisi batimetri dan kelerengan dasar perairan PPN Pemangkat. Data penelitian yang digunakan adalah data batimetri yang diambil menggunakan echosounder yang dikoreksi oleh data pasang surut untuk penentuan nilai chart datum. Data pasang surut yang digunakan diambil selama 15 hari pada tanggal 4-18 Desember 2021 dengan interval pengambilan 1 jam. Hasil penelitian menunjukkan bahwa nilai kedalaman di PPN Pemangkat berkisar 0,31 m sampai -4,04 m. Bentuk morfologi di PPN Pemangkat diklasifikasi dalam kategori dominan datar, dengan persentase 0-8%.
Investigating Species Composition and Abundance of Marine Microalgae from Temajo Island Waters, West Kalimantan, Indonesia Safitri, Ikha; Kushadiwiojayanto, Arie Antasari; Sofiana, Mega Sari Juane; Nguyen, Duc-Hung; Adjout, Rebiha
Jurnal Biodjati Vol 9, No 2 (2024): November
Publisher : UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/biodjati.v9i2.38028

Abstract

Temajo Island is renowned for its marine tourism activities and is home to a range of organisms, including algae. Microalgae serve as indicator species, offering insights into the aquatic environment through their species composition and abundance. This study aims to provide preliminary data on the abundance and some ecological indices (diversity, evenness, and dominance) of microalgae on Temajo Island, which will be the basis for assessing water conditions and supporting conservation efforts and sustainable management of natural resources. The research was carried out at four stations with different characteristics. At each station, surface water samples were collected using a plankton net. The microalgae in these samples were subsequently examined under a microscope, and their quantities were measured. The microalgae abundance ranged from 2.84 to 7,697.14 ind/L, with an average of 193.34 ind/L. Chaetoceros was the most abundant genus, followed by Rhizosolenia, Guinardia, Thalassiosira, Pseudo-nitzschia, and Bacteriastrum. The diversity index (H’) ranged from 2.67 to 3.08, indicating moderate to high species richness, while the evenness index (E) ranged from 0.64 to 0.74, reflecting a high level of uniformity among microalgae populations. The dominance index (C) varied between 0.11 and 0.20, suggesting low dominance by any single genus. These indices collectively indicate a balanced and diverse microalgae community, underscoring the ecological health and stability of the Temajo Island waters. Preliminary information about the species composition and abundance of marine microalgae in this study provides valuable insights into the dynamics of microalgae populations and their ecological implications in the marine ecosystems of Indonesia.
Investigating Species Composition and Abundance of Marine Microalgae from Temajo Island Waters, West Kalimantan, Indonesia Safitri, Ikha; Kushadiwiojayanto, Arie Antasari; Sofiana, Mega Sari Juane; Nguyen, Duc-Hung; Adjout, Rebiha
Jurnal Biodjati Vol 9 No 2 (2024): November
Publisher : UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/biodjati.v9i2.38028

Abstract

Temajo Island is renowned for its marine tourism activities and is home to a range of organisms, including algae. Microalgae serve as indicator species, offering insights into the aquatic environment through their species composition and abundance. This study aims to provide preliminary data on the abundance and some ecological indices (diversity, evenness, and dominance) of microalgae on Temajo Island, which will be the basis for assessing water conditions and supporting conservation efforts and sustainable management of natural resources. The research was carried out at four stations with different characteristics. At each station, surface water samples were collected using a plankton net. The microalgae in these samples were subsequently examined under a microscope, and their quantities were measured. The microalgae abundance ranged from 2.84 to 7,697.14 ind/L, with an average of 193.34 ind/L. Chaetoceros was the most abundant genus, followed by Rhizosolenia, Guinardia, Thalassiosira, Pseudo-nitzschia, and Bacteriastrum. The diversity index (H’) ranged from 2.67 to 3.08, indicating moderate to high species richness, while the evenness index (E) ranged from 0.64 to 0.74, reflecting a high level of uniformity among microalgae populations. The dominance index (C) varied between 0.11 and 0.20, suggesting low dominance by any single genus. These indices collectively indicate a balanced and diverse microalgae community, underscoring the ecological health and stability of the Temajo Island waters. Preliminary information about the species composition and abundance of marine microalgae in this study provides valuable insights into the dynamics of microalgae populations and their ecological implications in the marine ecosystems of Indonesia.
Co-Authors Adjout, Rebiha Ikha Safitri Maulana, Agung Lan Mega Sari Juane Sofiana Muliadi Nguyen, Duc-Hung