The thesis deals with eutrophication of fishponds in the sixteen regions in the Czech Republic. Data about basic chemistry and nutrients (nitrogen and phosphorus) were evaluated in terms of temporal (during the years 1995 - 2003 and 2012) and spatial differences. ANOVA one-way and linear regression analysis, were used for detail description. Only regions (locality) Lednice, Brno, Ostrava and Řežabinec showed regular differences in most of the parameters. Between other regions individual differences were frequently found, mostly in conductivity and alkalinity, which are primarily reflect the different character of the catchments e.g. natural conditions. Less significant differences were observed in total N, and minimal differences were found in total P and chlorophyll. The high level of fishpond eutrophication has been also demonstrated by similarities in seasonal trends. Increasing the average value of the total P from 0, 23 mg/L to 0, 32 mg/L and increased chlorophyll concentration from 76 ?g/L to 218 ?g/L from spring to summer, are typical patterns for shallow fishponds heavily loaded with nutrients. The results allow to conclude, that fishpond eutrophication level is similar over the most of studied regions and remains unchanged during the last decades.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:188498 |
| Date | January 2015 |
| Creators | STRNADOVÁ, Johana |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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