National Repository of Grey Literature 3 records found  Search took 0.00 seconds. 
Interactions of herbivore funtion gourps and Succisa pratensis
Šulcová, Hana ; Janovský, Zdeněk (advisor) ; Walmsley, Alena (referee)
Herbivory is one of most important factors which form meadow ecosystems. These ecological communities have one of the biggest variety of species in Central Europe and their research is important in terms of management of protected species as well. Localities which has a similar importance, is also a meadow ecosystem with occurrence of Succisa pratensis, the only host plant for rare butterfly Euphydryas aurinia. Research of Succisa and its other herbivores can improve a protection of this particular butterfly. Effects of herbivores of Succisa were examined by several experiments. The first one was a field cage experiment. Its aim was to detect what kinds of herbivores (rodents and invertebrates) are involved in herbivory of leaf rosettes of Succisa and what is their impact on the fitness of these plants. The intensity of herbivory of Succisa was measured for over two vegetation seasons on the month bases. In this experiment were also examined effects of surrounding vegetation on the studied plants of Succisa. The second experiment was performed in a garden. Its aim was to clarify the role of herbivores of leaf rosettes, stalks and their interactions on the fitness of Succisa. The third experiment was concerned to true bugs, which are pre-dispersal predators of seeds of Succisa. Their effects on...
More effective approaches of brown coal post-mining restoration
Christov, Ivan ; Hendrychová, Markéta (advisor) ; Walmsley, Alena (referee)
The thesis is focused on evaluation of landscape restoration procedures. The land was heavily devastated by large-scale quarrying. Here are compared reclamation procedures used in the Czech Republic and abroad. Study area is the North Bohemian brown coal basin, which formed areas valuable for many endangered species of flora and fauna after the mining has ended. Surface coal mining method causes the extinction of villages, roads, railways, land and greenery. Our task now is to minimalize these effects as much as possible. To create a new landscape, with an emphasis on the environment. Reclamation helps us to do that. Monitored location is Střimická dump, where the representation of non-productive habitat was evaluated and there was proposed new, more efficient version of reclamation. Mapping has found that the current state of the dump is 5,2 % representation of non-productive habitat. The proposed variant represents the addition of new elements and thus increase the proportion to 23,5 %, which corresponds with the current trend of post-mining landscape recovery.