2010 Fiscal Year Final Research Report

Study on microbial community in tidal flat sediment sampled from Shirakawa- and Midorikawa-river.

Research Project

Project/Area Number	20510091
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	一般
Research Field	Environmental technology/Environmental materials
Research Institution	Kumamoto University
Principal Investigator	MORIMURA Shigeru Kumamoto University, 大学院・自然科学研究科, 准教授 (20230146)
Project Period (FY)	2008 – 2010
Keywords	生態環境 / 干潟環境
Research Abstract	Redox-balanced circulation of nitrogen and sulfur will occur in a tidal flat where both aerobic and anaerobic conditions are shown by changing tide level. Bacteria should take important role in the elemental circulation and unbalanced circulation changes environmental condition worse. We analyzed microbial community in tidal flat sampled from Shirakawa- and Midorikawa-river. From the results in clone analysis targeted to 16S rRNA gene, both aerobic and anaerobic bacteria were detected in all samples and Alphaproteobacteria, Gammaproteobacteria, Deltaproteobacteria, Chloroflexi, Bacteroidetes and Actinobacteria were dominant. However, Thiobacillus group was dominant by the analysis targeted to functional genes such as aprA and nirS.