Acta Univ. Agric. Silvic. Mendelianae Brun. 2013, 61(5), 1383-1390 | DOI: 10.11118/actaun201361051383

Dynamics of the cyanobacterial water bloom with focus to Microcystis and its relationship with environmental factors in Brno reservoir

Lucie Straková1,2, Radovan Kopp1,2, Eliška Maršálková2, Blahoslav Maršálek2
1 Department of Fishery and Hydrobiology, Mendel University in Brno, Zemědělská 1, 613 00 Brno, Czech Republic
2 Institute of Botany ASCR (Centre for cyanobacteria and their toxins), Lidická 25/27, 657 20 Brno, Czech Republic

Our paper brings new information about long-term changes of the phytoplankton communities in the Brno reservoir with the focus on the Microcystis abundance using the semi-monthly monitoring data covering the period 2006-2012. The main aim is to extract from this long-term data set differences in number of Microcystis cells depending on environmental factors. The development of cyanobacteria in Brno reservoir is caused by excessive phosphate loading from wastewater treatment facilities upstream and from non-point sources along the Svratka river. It focuses management effort on upstream controls of reservoir condition. High abundance in millions of cyanobacteria cells in 1ml observed in Brno reservoir before was reduced to values in the order of thousands cells in 1ml in last two years through a combination of measures (liming, precipitation of phosphorus on inflow, aeration and destratification). Phytoplankton composition was also changed and at the expense of cyanobacteria promoted the development of green algae and diatoms.

Keywords: cyanobacteria, blue-green algae, destratification, phosphorus
Grants and funding:

This study was supported by the Research plan No. MSM6215648905 "Biological and technological aspects of sustainability of controlled ecosystems and their adaptability to climate change", which is financed by the Ministry of Education, Youth and Sports of the Czech Republic.

Received: May 9, 2013; Published: September 28, 2013  Show citation

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Straková, L., Kopp, R., Maršálková, E., & Maršálek, B. (2013). Dynamics of the cyanobacterial water bloom with focus to Microcystis and its relationship with environmental factors in Brno reservoir. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 61(5), 1383-1390. doi: 10.11118/actaun201361051383
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