Abstract
Relationship between distribution of bacteria and physicochemical characteristics in tidal flat was studied. Sediment samples in Shirakawa river as sandy site and Midorikawa river as muddy site in Kumamoto Prefecture were investigated for the analysis of microbial community and the determination of sediment characteristics such as oxygen-redox potential, organic matter content, and so on. Midorikawa was seemed to be anaerobic and anaerobic bacteria were detected at that site. On the other hand, Shirakawa river was aerobic and aerobic bacteria were detected. Sulfur reducing bacteria, one of the anaerobic bacteria, might be the key group for understanding the relationship between microbial community and physicochemical characteristics in tidal flat.
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