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Algae 1989;4(2): 121-133. |
Evaluation of River Water Quality by Diatoms
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Hiromu Kobayasi, Shigeki Mayama
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Tokyo Diatom Institute. Department of Biology, Tokyo Gakugei University
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ABSTRACT |
In order to evaluate simply the Japanese-type river water quality, a practicable method using differentiating diatom groups is proposed. Japanese rivers are generally shorter, shallower, and run faster. Therefore, though the present grouping is considered to be equivalent to Lange-Bertalot's (Category 1-3, Nova Hedwigia Beih. 64: 285-304. 1979), considerable differences have resulted in the members of the relevant groups. For the evaluation of the water quality of rivers, the employment of the formula of Pantle-Buck giving a saprobic value of 4 to the Group A taxa, 2.5 to the Group B taxa, and 1 to the others is suggested. This method is simple and easy and the results of applying this method to the Japanese river waters were in general agreement with chemical analyses.
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Key words:
Diatom, differentiating diatom groups, pollution-tolerant diatom groups, water quality evaluation, water pollution. |
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