Marine Biology

, Volume 101, Issue 2, pp 265–271 | Cite as

Phosphorus dynamics associated with phytoplankton blooms in eutrophic Mikawa Bay, Japan

  • M. Sakamoto
  • T. Tanaka


Changes in the phosphorus components of the particulate matter in seawater were studied in the eutrophicated waters of Mikawa Bay, Japan, during summer 1981. The contents of particulate phosphorus and hot-water extractable intracellular phosphorus displayed remarkable changes associated with phytoplankton blooms caused by wind-induced or upwelling-associated nutrient enrichment from the bottom water layers. Nanoplankton <10 μm accounted for much of the particulate phosphorus (70 to 79% in June and July, and 44 to 78% in August and September); the contribution of large-sized phytoplankton >25 μm varied from 9 to 49%, the peak values being attained under red-tide conditions. The capacity for phosphorus storage in cells was low in nanoplankton cells, high in large phytoplankton species. Differences in rates of phosphorus storage and growth between nanoplankton and large phytoplankton accounted for fluctuations in particulate phosphorus which were closely associated with fluctuations in phytoplankton blooms in Mikaw Bay.


Phosphorus Phytoplankton Water Layer Bottom Water Nutrient Enrichment 
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Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • M. Sakamoto
    • 1
  • T. Tanaka
    • 2
  1. 1.Water Research InstituteNagoya UniversityNagoyaJapan
  2. 2.Aichi Environmental Research CenterNagoyaJapan

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