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Recovery of zooplankton community from the acidification in mountain lakes
Bartošíková, Martina ; Sacherová, Veronika (advisor) ; Šorf, Michal (referee)
Mountain Lakes in Bohemian forest are currently undergoing a process of acidification. In spite of the rapid improvement of chemistry, the biological recovery is considerably delayed. This state may be due to a number of factors, such as persistent periodic pH fluctuations and hence increased aluminum leaching, phosphorus limitation, resistance of acid-tolerant communities, or limited opportunities for spreading from surrounding sites or damage to the egg bank. With the delay in improving the chemical composition of water gradually comes the improvement of the biological state, which manifests in the first phase by increasing the abundance of the existing species, in the second by increasing the number of species. In addition to the fish, it seems that the largest filtering dwarfs of the genus Daphnia are returned. In spite of their efforts to accelerate their return in the natural experiment by repatriating the species Cyclops abyssorum and Daphnia longispina to Plešné Lake in 2004, the wildebeests did not enjoy the new locality. Still, after almost ten years, individual individuals of this kind were found in lake litoral. This diploma thesis builds on the research of the Bohemian forest lakes, which is going on for almost 150 years. The zooplankton's response to changes in chemistry was studied...
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