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Evaluation of the water quality of the Hakata River based on diatoms
Masami Sakai1, Mitsuyasu Kawakami2, Kei Amada2
1Division of Material Science and Production Engineering, Graduate school of Engineering, Fukuoka Institute of Technology, Fukuoka, 811-0295, Japan. ad10001@bene.fit.ac.jp
Abstract:
We investigated the epilithic diatom assemblage of samples collected from three sites of the Hakata River, Fukuoka, Japan, on November 26, 2008. Each taxon was photographed and identified. The 1747 diatom frustules collected were classified into 33 taxa belonging to 17 genera. Nitzschia fonticola was abundant at all sites. The DAIpo (the diatom assemblage index to organic water pollution) values for sites 1, 2, and 3 were 50.2, 44.1 and 48.0, respectively, indicating that the water quality of the Hakata River was at β-mesosaprobic level.

