The purpose of this thesis is to obtain informations about the parameters of environment, which increases respiratory processes in fishponds and can cause an oxygen deficit. 24 monitored lakes were chosen according to the requirements of Rybářství Třeboň a.s. Between 4. 2. 2014 and 30. 9. 2014 took place 10 samplings. Water samples were taken for chemical laboratory analysis. At the same time there were made field measurements of basic physico-chemical parameters - dissolved oxygen concentration, temperature, color and transparency. Laboratory analysis determined compound and forms of nitrogen, phosphorus, carbon and the quantity of chlorophyll-a. Plankton respiration per 24 hours was detected by measuring the oxygen consumption by plankton in sizes up to 235 microns. Relations between respiration and other parameters, and different concentration of dissolved oxygen at the surface and in the depth of 1 m and the other parameters were compared using regression and correlation analysis. The observed decreasing trend of the seasonal oxygen saturation indicates that whole fishpond is dominated by respiratory processes. The results of correlation analysis, comparing the relationship of environmental parameters and respiration pelagial per 24 hours, shows that respiration correlates most with organic carbon content (representing the amount of organic substance). Furthermore, positively correlates content of total nitrogen, the amount of phytoplankton expressed as chlorophyll-a concentration and transparency. Content of particulate and total nitrogen, amount of phytoplankton and transparency also positively correlated with respiration. Total phosphorus concentration correlates with the respiration least of the monitored parameters.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:251572 |
| Date | January 2016 |
| Creators | LENDLEROVÁ, Lucie |
| 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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