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National Repository of Grey Literature 3 records found  Search took 0.00 seconds. 
The effect of drainage and restoration on vegetation of wet peaty meadows.
 Krejčová, Jana ; Frouz, Jan (advisor) ; Syrovátka, Oldřich (referee)
The aim of this thesis is to summarise the current knowledge of the effects of amelioration entervention especially drainage on wet meadow vegetation. First part of this thesis consisting of literature review of scientific papers and other studies summarises the influence of water on soil. It describes how the loss of water and degradation of soil influence the plant communities of wetlands. Drainage of wetlands was very common due to the intensification of agriculture in the past. The amelioration intervension resulted in the loss of peat horizon in soil and reduction of biodiversity. This review explains the reasons to common drainage in the past. In conclusion of the review, the thesis evaluates the efficiency and possibilities of wetland biotopes restoration. The second part of the thesis describes the specific research in the village Senotín (running between 2015 and 2016) which compared the results of the studies from 1996 and 2016. The effectiveness of restoration was examined and compared on the basis of phytosociological images of vegetation which are presented on three different types of areas.
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Factors determining the vegetation composition of wet meadows and its changes in time
 Šimák, Martin ; Münzbergová, Zuzana (advisor) ; Procházka, Tomáš (referee)
This thesis is mainly a literature review of scientific papers and other studies of wet meadows and their characteristics. The aim of the thesis is to summarise knowledge especially of the changes of the vegetation composition of the wet meadows, reveal the causes of such changes and consider the influence of different types of management. Wet meadows underwent crucial changes. They have been drained, the grazing or mowing has ended up and many species were unable to adapt to the changed conditions. Biodiversity in general has been decreasing on these habitats and it has been caused mainly by the total change in management. By comparing different scientific papers I identified common characteristics of the declining species and optimal managment options suitable for stopping their decline were detected. Consequently, I introduce the main methods used to study changes in vegetation composition over time. In the final part of the thesis I mention Slavkovský Les as the area where my future research will be conducted.
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Vegetation and geobiocoenological classification of silver fir forests of the Czech Republic – preliminary results
 Boublík, Karel
Preliminary results of vegetation classification of silver fir (Abies alba) forests are given. Seven communities from three alliances were distinguished in the Czech Republic. Climax stage of vegetation on the habitats of each association was investigated by geobiocoenological methods. It is claimed, that fir forests are seminatural that originated by stronger human impact (incl. fir forests on pseudogleys). They depend on forest grazing, litter raking, and other forest management. Fagus sylvatica is supposed to be dominant or frequent tree under natural conditions.
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