植物プランクトンブルーム出現にかかわる溶存ケイ酸の役割

• 角皆 静男

  北海道大学水産学部

• 渡辺 康憲

  北海道大学水産学部

書誌事項

タイトル別名

• Role of Dissolved Silicate in the Occurrence of a Phytoplankton Bloom

抄録

The spring bloom of phytoplankton was studied in March in Funka Bay, Japan, to test the Tsunogai (1979)'s hypothesis regarding the role of silicate in the bloom. The hypothesis comprises two parts. 1) Diatoms are predominant when all the physical and chemical conditions are adequate for plankton growth. 2) Since the Si: P ratio of the diatom body is usually much larger than that of sea water, flagellates (non-siliceous phytoplankton) replace diatoms after dissolved silicate in the sea water has been almost completely consumed by diatoms. At the end of the bloom in late March phosphate still remained in the water but silicate was exhausted and the main species of phytoplankton changed from diatoms to flagellates. Grazing pressure by zooplankton at this time was not so great. A model using the data on assimilation rates of silicate showed a dramatic change of silicate uptake in late March. Poison in scallops caused byProtogonyauluxsp.(dinoflagellates) rapidly increased from mid-April at all stations along the coast of Funka Bay. All of these findingssupport Tsunogai's hypothesis.

収録刊行物

• 日本海洋学会誌

  日本海洋学会誌 39 (5), 231-239, 1983

  日本海洋学会

キーワード

• Oceanography
• General Earth and Planetary Sciences
• Earth-Surface Processes
• General Engineering
• Soil Science
• General Environmental Science

詳細情報

• CRID: 1390001206565353088
• NII論文ID: 30018375471
• NII論文ID: 130003849271
• DOI: 10.1007/bf02070393
• ISSN: 21863113
• ISSN: 1573868X
• ISSN: 00298131
• Web Site: http://link.springer.com/content/pdf/10.1007/BF02070393.pdf
• Web Site: http://link.springer.com/article/10.1007/BF02070393/fulltext.html
• Web Site: http://link.springer.com/content/pdf/10.1007/BF02070393
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