Analysis of germination characteristics of Anabaena akinete in the bottom sediment for the blue-green algae inhibition

2014 Fiscal Year Final Research Report

• Project/Area Number: 24560657
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Civil and environmental engineering
• Research Institution: Tohoku University
• Principal Investigator: NOMURA MUNEHIRO 東北大学, 工学(系)研究科(研究院), 助教 (70359537)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 富栄養化 / 水質汚濁 / 発芽

Outline of Final Research Achievements

The algal bloom causes deterioration of water qualities such as taste and odor. Cyanobacteria Anabaena is one of the main species which cause algal bloom and musty odor problem. Although Anabaena has a mechanism to make akinete (resting cell) to stand bad environment, the influence of akinete on algal bloom formation is still unclear. In this study, the condition of water bloom in Urushizawa Dam was investigated using the yearly data collections, field study and simulation analysis about akinete germination of Anabaena. As the results, it was suggested that germination of Anabaena is triggered by lowering the water level in June, and also suggested that the length of daylight in this time has correlation with biomass of Anabaena in the summer. And it was also suggested that keeping the water level high can inhibit germination of Anabaena.

Free Research Field

環境生態工学