Effect of nutrient concentration and salinity on diel vertical migration of Chattonella marina (Raphidophyceae)

Toshiya Katano, Makoto Yoshida, Souichi Yamaguchi, Kenji Yoshino, Takaharu Hamada, Masumi Koriyama, Yuichi Hayami

    Research output: Contribution to journalArticlepeer-review

    15 Citations (Scopus)

    Abstract

    Vertical migration plays an important role in the development of Chattonella populations in the natural environment; however, this behaviour has remained largely undescribed. In the present study, the diel vertical migration of Chattonella marina in the Ariake Sea was examined along with nutrient concentrations and salinity at four sampling sites during the bloom in the summers of 2008, 2009 and 2010. Cells of Chattonella were abundant at the surface (0 m depth) in the daytime in most cases. However, when surface salinity was 9, which is the lower limit for growth, the population accumulated at a depth of 2 m, where salinity was 15, suggesting that Chattonella moves to avoid water with low salinity. Chattonella cells actively migrated, even under nutrient-replete conditions (mean DIN concentration, 12.73 μM). The present study demonstrates that Chattonella cell migration is independent of nutrient availability. In addition, Chattonella cells stop upward migration when the surface salinity is low (< 15). These insights are important for making predictions of Chattonella population dynamics after heavy rains.

    Original languageEnglish
    Pages (from-to)1007-1018
    Number of pages12
    JournalMarine Biology Research
    Volume10
    Issue number10
    DOIs
    Publication statusPublished - Nov 2014

    All Science Journal Classification (ASJC) codes

    • Oceanography
    • Ecology, Evolution, Behavior and Systematics
    • Aquatic Science

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