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<p>Ctenophore <i>Pleurobrachia globosa</i> (<i>P. globosa</i>) invades even the northernmost Bohai Sea from the south of China. Three years (2019–2021) of surveys were conducted in the Bohai Bay (BoB) of the Bohai Sea to examine its population dynamics and potential impact on nuclear power plants. Results show that <i>P. globosa</i> mainly occurred from July to October each year, reaching the maximum abundance in August/September and even bloomed in August 2020. Correlations with environmental factors indicate this species has strong tolerance to acidification and hypoxia, and it has potentially indirect feeding relationship with phytoplankton. Seven stages in three groups were illustrated in life history of <i>P. globosa</i>. Two entire generations were detected in August, confirming its 2-week generation time. Spawning time started earlier in the south than in the north of BoB. The spatiotemporal variation and life cycle of <i>P. globosa</i> in BoB are useful for further study on the invasion, bloom, aggregation, and regeneration of <i>P. globosa</i>.</p>

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Population dynamics of a northward invasive ctenophore, Pleurobrachia globosa Moser, 1903 in the Bohai Bay, China

  • 期刊论文

  • 发表日期：

    2025年3月20日

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  • Deyue Sun,
  • Hongliang Gu,
  • Xiaohong Sun,
  • Fengshang Duan,
  • Xiaomin Li,
  • Zhen Guo,
  • Yuyan Ma,
  • Yushan Xu,
  • Chunli Liu

摘要

Ctenophore Pleurobrachia globosa (P. globosa) invades even the northernmost Bohai Sea from the south of China. Three years (2019–2021) of surveys were conducted in the Bohai Bay (BoB) of the Bohai Sea to examine its population dynamics and potential impact on nuclear power plants. Results show that P. globosa mainly occurred from July to October each year, reaching the maximum abundance in August/September and even bloomed in August 2020. Correlations with environmental factors indicate this species has strong tolerance to acidification and hypoxia, and it has potentially indirect feeding relationship with phytoplankton. Seven stages in three groups were illustrated in life history of P. globosa. Two entire generations were detected in August, confirming its 2-week generation time. Spawning time started earlier in the south than in the north of BoB. The spatiotemporal variation and life cycle of P. globosa in BoB are useful for further study on the invasion, bloom, aggregation, and regeneration of P. globosa.