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Vertical distribution of phytolankton in flooded quarries near Blatná
Bílý, M. ; Pithart, David
About 20 allluvial pools were measured concerning the shading of their water surface, which is important for the light conditions in their water column. The effect of daytime and sunny (overcast, cloudy) weather was tested. The light intensity was measured from the boat on the virtual network at the surface and simultaneously outside the pool on an unshaded spot.
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Jak lze měřit relativní zastínění tůní
Bílý, Michal ; Pithart, David
Three mezotrophic flooded quarries were studied for stratification and phytoplankton vertical distribution, one also for diurnal vertical migration. Flagellates dominated at all localities, at the boundary between oxic and anoxic zone there were Cryptomonas spp. dominated assemblages occupying narrow water layers.
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Proces diverzifikace chemismu a fytoplanktonu tůní po povodni
Pithart, David
Seven floodplain pools were observed for water chemistry and phytoplankton development in the time of the end of flooding period. After the disconnection from the river stream, pools repidly developed into a heterogeneous file of water bodies in terms of oxygen concentration, chlorophyll a concentration and phytoplankton composition. Morphology, exposition to flooding, exposition to shading vegetation and different source of water inflow were found to be a key factors of this diversification.
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Fenomén tůně: úvod do morfologie, hydrologie a limnologie
Pithart, David ; Pechar, Libor ; Hrbáček, Jaroslav
Small size of pools result in large interaction with the surrounding terrestrial ecosystem. 1.Wind protection caused by banks and vegetation results in stable water column. 2. Shading of vegetation restrict the amount of light, reaching the water surface. 3. Inflows of underground water may influence the water chemistry substantially. 4. Bottom processes influence the whole water volume in larger extent compared to large lakes.
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