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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Change of water habitats characteristics on technicaly unreclaimed spoil banks.
 Ščudlová, Zuzana ; Solský, Milič (advisor) ; Kadlec, Tomáš (referee)
Amphibian decline in recent decades has led to increasing emphasis on monitoring amphibian population abundances. Efforts to assess the condition of each amphibian populations greatly complicate significant natural fluctuations in population size. This may occur particularly in the case of short-term studies that currently prevail. Spoil banks represent a suitable environment for a range of environmental studies. Often these places are not in direct influence of human activities, thus offering the possibility of studying natural processes. On the Hornojiřetínská spoil bank (approximately 6 km2) has been underway since 2005, abundance monitoring of agile frog (Rana dalmatina) and recording and selecting characteristics of water bodies. At the spoil bank is located about 400 aquatic habitats. 225 of them are continuously monitored the development of aquatic habitats and 134 monitored abundance of agile frog. Development of aquatic habitats is not routinely examined unlike development of terrestrial environment. Results showed that the depth of the pond is reduced, surroundings were overgrown and insolation of water level has fallen. Only littoral vegetation showed no change. Abundance of agile frog fluctuated more than 10 times during the studied period, but the data manifested no trends. Decreases slightly outnumbered increases (6 vs. 4), exhibited greater range (1.07 to 6.40 versus 1.69 to 2.40) and and occurred within a longer consecutive period (5 vs. 2 years). Furthermore, it was strong correlation between total abundance and occupied ponds. The results of this study point to the need to establish an appropriate management and the necessity of long-term studies for a correct understanding population dynamics of amphibians.
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