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<p>The ‘Pinglu Canal Waterway’ represents a mega-project in human history, currently under construction in Qinzhou Bay and scheduled to be fully operational by the end of 2026. Since shipping activities are a major pathway for introducing non-indigenous invasive species, baseline data on phytoplankton occurrence and distribution before the operation of the ‘Pinglu Canal Waterway’ is necessary to better study the ecological impact of this mega anthropogenic activity. In this study, the phytoplankton community structure at the entrance of the ‘Pinglu Canal Waterway’ (the Maowei Sea) and nearby control areas (Dafeng Jiang) was explored using metabarcoding techniques. A total of 205 phytoplankton species were identified, representing 110 families and 150 genera. Among them, 13 are harmful algal bloom species (HABs) or potential HABs, and 5 are potential non-indigenous invasive phytoplankton species. The results of this study not only enrich the baseline information on phytoplankton in Qinzhou Bay, but also strengthen our foundation for studying the potential environmental impact of the ‘Pinglu Canal Waterway’ anthropogenic mega-project in the future.</p>

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Phytoplankton Community Structure in the Qinzhou Bay, China: A baseline Information for Non-Indigenous Species Before the Operation of the ‘Pinglu Canal Waterway’

  • 期刊论文

  • 发表日期：

    2026年5月13日

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  • Karsoon Tan,
  • Leiheng Huang,
  • Jinman Huang,
  • Cong Luo,
  • Baoling Xie,
  • Peng Xu

摘要

The ‘Pinglu Canal Waterway’ represents a mega-project in human history, currently under construction in Qinzhou Bay and scheduled to be fully operational by the end of 2026. Since shipping activities are a major pathway for introducing non-indigenous invasive species, baseline data on phytoplankton occurrence and distribution before the operation of the ‘Pinglu Canal Waterway’ is necessary to better study the ecological impact of this mega anthropogenic activity. In this study, the phytoplankton community structure at the entrance of the ‘Pinglu Canal Waterway’ (the Maowei Sea) and nearby control areas (Dafeng Jiang) was explored using metabarcoding techniques. A total of 205 phytoplankton species were identified, representing 110 families and 150 genera. Among them, 13 are harmful algal bloom species (HABs) or potential HABs, and 5 are potential non-indigenous invasive phytoplankton species. The results of this study not only enrich the baseline information on phytoplankton in Qinzhou Bay, but also strengthen our foundation for studying the potential environmental impact of the ‘Pinglu Canal Waterway’ anthropogenic mega-project in the future.