Cyanobacterium Microcystis bloom in a eutrophicated regulating reservoir

The effect of the hydraulic turnover rate on dominance of the cyanobacterium Microcystis was examined using field data from the summer of 2001 for the Minami-shio Reservoir, a shallow eutrophic regulating reservoir in Japan, where the water outflow and storage volumes are measured hourly. A Microcys...

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Bibliographic Details
Published in:JARQ. Japan agricultural research quarterly 2006, Vol.40(3), pp.283-289
Main Authors: Yoshinaga, I.(National Inst. of Rural Engineering, Tsukuba, Ibaraki (Japan)), Hitomi, T, Miura, A, Shiratani, E, Miyazaki, T
Format: Article
Language:English
Subjects:
algal bloom
AMENAGEMENT DE BASSIN VERSANT
CONDICIONES ATMOSFERICAS
CONDITIONS METEOROLOGIQUES
ESTADO NUTRICIONAL
ETAT NUTRITIONNEL
Freshwater
hydraulic turnover rate
METEOROLOGICAL FACTORS
METHODE STATISTIQUE
METODOS ESTADISTICOS
MICROCYSTIS
NUTRITIONAL STATUS
ORDENACION DE CUENCAS
STATISTICAL METHODS
WATERSHED MANAGEMENT
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Summary:The effect of the hydraulic turnover rate on dominance of the cyanobacterium Microcystis was examined using field data from the summer of 2001 for the Minami-shio Reservoir, a shallow eutrophic regulating reservoir in Japan, where the water outflow and storage volumes are measured hourly. A Microcystis bloom occurred in late summer when the daily hydraulic turnover rate decreased to 15%. The hydraulic turnover rate provided an index of nutrient supply rate, because the nutrient load was input mostly in the inflowing water and because the water body was well mixed. Field measurement results indicate that the low hydraulicturnover rate led to the Microcystis bloom.
ISSN:0021-3551
2185-8896
DOI:10.6090/jarq.40.283