2001 Fiscal Year Final Research Report Summary
Effect of Chelating Substances on the Succession of Blue-Green Algae
| Project/Area Number |
11660099
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
応用微生物学・応用生物化学
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| Research Institution | The University of Tokyo (2000-2001)
National Institute for Environmental Studies (1999) |
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Principal Investigator |
YAGI Osami Graduate School of Eng,The University of Tokyo Professor, 大学院・工学系研究科, 教授 (40132865)
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| Co-Investigator(Kenkyū-buntansha) |
IWASAKI Kazuhiro Nat'l Inst. Environ. Stud, Research Team for Molecular Ecological Effect, Senior Researcher, 分子生態影響評価研究チーム, 主任研究員 (30193717)
KURISU Futoshi Graduate School of Eng, The University of Tokyo Research Associate, 大学院・工学系研究科, 助手 (30312979)
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| Project Period (FY) |
1999 – 2001
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| Keywords | Microcystis / Water bloom / Blue green algae / EDTA / Chlating substances / Lake Kasumigaura |
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| Research Abstract |
Determination of Algal Growth Potential (AGP) and limiting substances in Lake Kasumigaura were carried out from April 1999 to November 2001 using algal assay procedure. AGPs of filtrates using Microcystis aeruginosa were less than 2 mg/L. The growth of Microcystis, Anabaena, Phormidium were stimulated by the addition of EDTA or EDTA and nitrate. Oscillatoria was able to grow by the both addition of phosphorus and nitrogen without EDTA. It seems that chelate substance concentration was very important for the blue-green algal succession. Natural chelate substances such as fumic and fulvic acids isolated from Lake Kasumigaura sediment mitigated the heavy metal toxicity for the growth of Microcystis aeruginosa.
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