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Diel migration of Microcystis during an algal bloom event in the Three Gorges Reservoir, China
The vertical migration patterns and buoyancy regulation of Microcystis in water bodies have important effects on algal bloom formation. To understand the migration mechanism of Microcystis in deep bodies of water, two sets of experiments were carried out to illuminate the complex vertical movements...
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Published in: | Environmental earth sciences 2016-04, Vol.75 (7), p.1, Article 616 |
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Main Authors: | , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | The vertical migration patterns and buoyancy regulation of
Microcystis
in water bodies have important effects on algal bloom formation. To understand the migration mechanism of
Microcystis
in deep bodies of water, two sets of experiments were carried out to illuminate the complex vertical movements in the Three Gorges Reservoir. Samples were taken during a 46-h period, with detailed monitoring of key parameters such as the solar irradiance, chlorophyll-
a
concentration, and water temperature. The index of dispersion and mean residence depth were computed to better understand the vertical distribution over time. The
Microcystis
colonies moved upward from the early morning until noon and sank from the surface in the afternoon and night. The vertical migration of
Microcystis
was the dominant factor affecting the dynamic changes of
Microcystis
in the enclosure. The water motion was also important in the diel dynamic changes of the
Microcystis
distribution. These results enable us to better understand the process of the initiation, development and appearance of blooms and allow us to devise new control strategies of algal bloom. |
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ISSN: | 1866-6280 1866-6299 |
DOI: | 10.1007/s12665-015-5124-x |