Relationship between magnitude of phytoplankton blooms and rainfall in a hyper-eutrophic lagoon: A continuous monitoring approach

Pei Jie Meng, Kwee Siong Tew, Hung Yen Hsieh, Chung Chi Chen

Research output: Contribution to journalArticle

6 Citations (Scopus)


To evaluate the effect of rainfall intensity on phytoplankton blooms, a continuous monitoring system was deployed during 2015 in a hyper-eutrophic lagoon in Taiwan. Intensive rainfall occurs during the wet summer months, from May to September. Salinity in the lagoon was found to decrease with increasing intensity of rainfall. The magnitude of phytoplankton blooms also increased linearly with increasing rainfall intensity. The chlorophyll a concentration rose by an order of magnitude during the heaviest rainfall. Blooms may be fueled by nutrient enrichment caused by drainage or run-off water from surrounding areas that is channeled into the lagoon during rainfall events. During bloom periods, the rates of net primary production and ecosystem respiration were high. However, this ecosystem was autotrophic for most of the year. As extreme rainfall is predicted to increase, the results of this study imply that the frequency and magnitude of phytoplankton blooms may increase in the future.

Original languageEnglish
Pages (from-to)897-902
Number of pages6
JournalMarine Pollution Bulletin
Issue number2
Publication statusPublished - 2017 Nov 30



  • Ecosystem respiration
  • Eutrophication
  • Net primary production
  • Phytoplankton blooms
  • Rainfall
  • Taiwan

ASJC Scopus subject areas

  • Oceanography
  • Aquatic Science
  • Pollution

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