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Hydrobiological monitoring of Medard Lake in 2017
Hejzlar, Josef ; Nedoma, Jiří ; Znachor, Petr ; Seďa, Jaromír ; Peterka, Jiří
The report summarizes the results of hydrobiological monitoring of Medard Lake 2017 and contains recommendations for further research activities. At the beginning of 2017, the lake was almost full, and at the end of March the last 30 cm water column was filled from the Ohře river. The ecosystem of the lake has reached its final nutrient load, which will be characterized by low levels of carrying capacity with low productivity planktonic and fish communities and specific seasonal changes in chemistry and biological parameters.
Hydrobiological monitoring of Medard Lake in 2016
Hejzlar, Josef ; Borovec, Jakub ; Nedoma, Jiří ; Znachor, Petr ; Seďa, Jaromír ; Peterka, Jiří
Presented report summarizes the results of hydrobiological monitoring of Medard Lake in 2016 and recommends further monitoring actions. Between November 2015 and June 2016 final flooding from river Ohře took place, resulting in enrichment of the lake ecosystem by large amount of nutrients at the beginning of vegetation season what affected seasonal development of chemical as well as biological parameters, from phytoplankton to fish.
The influence of nutrient loading, meteorological and hydrological conditions and operating manipulations on phytoplankton in the water suply reservoir Římov.
Hejzlar, Josef ; Jarošík, Jiří ; Nedoma, Jiří ; Seďa, Jaromír ; Znachor, Petr
Analysis of data collected during long-term and complex limnologic monitoring of the Římov reservoir in the period 1983 – 2015, which depict the development of physico-chemical conditions, hydrology and hydrodynamics of the reservoir with links to biological data on phytoplankton, zooplankton etc. showed that the concentration and species composition of phytoplankton depend on the supply and availability of nutrients, but are also influenced by climatic and hydrological conditions and water management operation of the reservoir.\n
Hydrobiological monitoring of Medard Lake in 2015.
Hejzlar, Josef ; Borovec, Jakub ; Nedoma, Jiří ; Znachor, Petr ; Seďa, Jaromír ; Peterka, Jiří
Presented report is summarizing the results of the hydrobiological monitoring of Medard Lake in 2015 and recommends further monitoring actions. In 2015 the lake was not flooding from river Ohře, therefore the water level increase was realized only by precipitation and inflow from lake’s own drainage area. Furthermore, it was the first year without stocking of maraena whitefish and brown trout.
Hydrobiological monitoring of Medard Lake in 2014
Hejzlar, Josef ; Borovec, Jakub ; Nedoma, Jiří ; Znachor, Petr ; Seďa, Jaromír ; Peterka, Jiří
Presented report is summarizing the results of the hydrobiological monitoring of Medard Lake in 2014 and recommends further monitoring actions. In 2014 the lake was not flooding from river Ohře, therefore the water level increase was realized only by precipitation and inflow from lake’s own drainage area. Forming of fish stock was realized according to stocking plans.
Hydrobiological monitoring of Medard Lake in 2013
Hejzlar, Josef ; Borovec, Jakub ; Nedoma, Jiří ; Znachor, Petr ; Seďa, Jaromír ; Peterka, Jiří
Presented report is summarizing the results of the hydrobiological monitoring of Medard Lake in 2013 and recommends further monitoring actions. In 2013 ongoing flooding of the lake from river Ohře had the main effect on the monitored parameters affecting the overall trophic level and having the cascading effect through the trophic pyramid.

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