title: Evaluation of the water quality of the Hakata River based on diatoms.
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.
authors: Division of Material Science and Production Engineering, Graduate school of Engineering, Fukuoka Institute of Technology, Fukuoka, 811-0295, Japan.  ad10001@bene.fit.ac.jp
authors: Masami
authors: M
authors: Sakai
authors: Department of Life, Environment and Materials Science, Faculty of Engineering, Fukuoka Institute of Technology, Fukuoka, 811-0295, Japan.
authors: Mitsuyasu
authors: M
authors: Kawakami
authors: Department of Life, Environment and Materials Science, Faculty of Engineering, Fukuoka Institute of Technology, Fukuoka, 811-0295, Japan. Electronic address: amada@fit.ac.jp.
authors: Kei
authors: K
authors: Amada
mesh_terms: D017377:Diatoms / Q000166:cytology; D007564:Japan; D045483:Rivers / Q000382:microbiology*; D060753:Water Quality
keywords: DAIpo (diatom assemblage index to organic water pollution); Hakata River; diatom assemblage; water quality evaluation