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Flora of southwestern part of Bohemian Karst
Synek, Michal ; Špryňar, Pavel (advisor) ; Kačmarová, Lucie (referee)
Since its begining in 19th century the floristic research in Bohemian Karst as a biogeographic region was not equivalent in all its parts. I was trying to collect informations about south-western part which is usually somehow overlooked compared to central or north-eastern part. Information include geological and klimatic definitions of the area as well as history of floristic research done here. Several studies we have from this area mention some interesting places with very interesting plant species. Still most of those localities aren't enough protected and are slowly (somewhere not really slowly) getting destroyed. The last part contains ideas and methodics for potential new mapping of flora in this area.
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What we know about salty ecosystems of the Europe and their distribution, origin and history?
Šemberová, Kristýna ; Stančík, Daniel (advisor) ; Špryňar, Pavel (referee)
Salt marsh and meadow vegetation belong to very specific type of azonal ecosystem. There develop is made possible because of high concentrations of salts in the substrate. On the coast the development results from the contact of shore area with seawater. The existence of inland salt meadow is depending on specific climatic, geological and pedological conditions. Plants (halophytes) developed specific types of adaptation to resist high level of salinity and other extreme conditions of their habitat. During evolution occurred this type of adaptation in several phylogenetic lineages independently. Structure and physiognomy of salt marsh and meadow vegetation depend on the degree of salinity of the substrate and we can distinguish several zones on this gradient. Climatic conditions during the pleniglacial were very favourable for the development of halophyte vegetation. The oldest salt marshes, which played role of the refuge, are located on the coast, but also in the inland of Central Asia. This kind of vegetation reaches also south part of Central and Eastern Europe. After glaciation and the arrival of the forest, big part of this vegetation disappeared. Some inland areas have been maintained thanks to a man, which has used them since Neolithic times as pastures. With the abolition of grazing,...
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Invasions of phytophagous insects in Central Europe
Rejmanová, Aneta ; Špryňar, Pavel (advisor) ; Koubek, Tomáš (referee)
This Bachelor thesis is meant as a literature search concerned with invasions of phytophagous insects in Central Europe (mainly in the Czech Republic). I have summarized the findings from Czech and foreign studies dealing with this issue. Biological invasions are now a significant phenomenon. About 400 species of non-native insects occur in the Czech Republic, of which about half are phytophagous insects. In my Bachelor thesis I dealt with terminology that related to this subjekt, some more general regularities in the relationship of plants and insects, the primary areas of non-native insects, their pathways and their impact. I also chose few well-known representatives for better ilustration and I trying to find out, which plants non-native insect attacks the most. Key words: alien insects, phytophagous, plant, invasive
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