Diversity of Heterocapsa (Dinophyceae) and the algal bloom event in the mariculture areas of Johor Strait, Malaysia

DOI Web Site Web Site 参考文献57件
  • Razali Roziawati Mohd
    Fisheries Research Institute, Department of Fisheries Malaysia
  • Mustapa Nurin Izzati
    Fisheries Research Institute, Department of Fisheries Malaysia
  • Yaacob Ku Kassim Ku
    Fisheries Research Institute, Department of Fisheries Malaysia
  • Yusof Fadzilah
    Fisheries Research Institute, Department of Fisheries Malaysia
  • Teng Sing Tung
    Faculty of Resources Science and Technology, Universiti Malaysia Sarawak
  • Hanafiah Afiqah Hamilton
    Faculty of Resources Science and Technology, Universiti Malaysia Sarawak
  • Hii Kieng Soon
    Bachok Marine Research Station, Institute of Ocean and Earth Sciences, University of Malaya
  • Mohd-Din Monaliza
    Bachok Marine Research Station, Institute of Ocean and Earth Sciences, University of Malaya
  • Gu Haifeng
    Third Institute of Oceanography, Ministry of Natural Resources
  • Leaw Chui Pin
    Bachok Marine Research Station, Institute of Ocean and Earth Sciences, University of Malaya
  • Lim Po Teen
    Bachok Marine Research Station, Institute of Ocean and Earth Sciences, University of Malaya

書誌事項

タイトル別名
  • Diversity of <i>Heterocapsa</i> (Dinophyceae) and the algal bloom event in the mariculture areas of Johor Strait, Malaysia
公開日
2022-08-30
DOI
  • 10.3800/pbr.17.290
公開者
日本プランクトン学会、日本ベントス学会

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説明

<p>In November 2020, a high biomass multi-species algal bloom caused heavy water discoloration in the fish and mussel farm areas of the Johor Strait, Malaysia. A total of 19 microalgal taxa were identified from the plankton samples collected during the bloom event. Eleven genera were diatoms, and eight genera were dinophytes. The microalgal composition was dominated by the diatom Guinardia sp., with an average cell density of 1.7×106 cells L−1, making up 65–80% of the phytoplankton composition. Concomitantly, high densities of the dinophytes Heterocapsa minima (3.8–5.3×105 cells L−1) and Karlodinium spp. (3.5–6.6×103 cells L−1) were found. This is the first record of the occurrence of H. minima in Malaysian waters. Detailed morphological observations of H. minima based on scanning electron microscopy are presented in this study. To have a better insight into the Heterocapsa species assemblages in the Johor Strait, the diversity of Heterocapsa species assemblages along the strait was investigated based on a metabarcoding approach. Environmental DNA collected between 2018 and 2019 was used for high throughput amplicon sequencing targeting the small subunit (SSU) ribosomal RNA gene marker. The metabarcoding analysis detected three rare Heterocapsa species in the waters, H. niei, H. rotundata, and H. steinii. The results showed that Heterocapsa species assemblages varied temporally across the strait, with higher species diversity and amplicon sequence variant (ASV) read abundances detected in the Eastern Johor Strait. Although no fish/shellfish kills were sighted during the 2020 bloom event, the presence of harmful microalgal species, such as Heterocapsa minima and Karlodinium spp., urged the need for a comprehensive HAB monitoring program in the Strait to safeguard the aquaculture industry in the areas.</p>

収録刊行物

  • Plankton and Benthos Research

    Plankton and Benthos Research 17 (3), 290-300, 2022-08-30

    日本プランクトン学会、日本ベントス学会

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