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The pond Svět - the development of selected environmental factors in the years 2009-2010
JAKEŠOVÁ, Ludmila
Fishpond Svět is one of the most prominent and attractive water bodies of Třeboň region. It is located close to Třeboň town, is is used for fish production and joined economic activities, as well as for recreation and sporting. To harmonize all the functions is the goal of the Rybářství Třeboň Co., owner of the fishpond, and local governement of Třeboň town. For revitalization of the fishpond, economic activities are harmonized in order to improve the water quality. The goal is provided via decreasing fish number, fertilizers and food, which resulted in decreasing numbers of cyanobacteria and algae in phytoplankton, especially during warm parts of years, when the troubles, for recretaion, are most. This measures are monitored by Inst. Botany Acad. Sci. via regular sampling and analysing NO2-, NO3-, tN, PO43-, tP, Cl- a NH4+ concentrations as well as temperature, Secchi desk depth and chlorophyll_a. I was participating in sampling and evaluation in period 2008-2010. Results of the monitoring are regularly presented in local press and internet home page of town Třeboň which is also covering the expenses of the project.
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