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Vegetation characteristics of localities and distribution of Ophrys insectifera in the Czech Republic
Rybová, Barbora ; Novák, Jan (advisor) ; Hamerský, Roman (referee)
Ophrys insectifera is a critically endangered species of orchid in the Czech Republic. It is characterized by the formation of sexually deceptive flowers, binding to specific pollina- tors and specific fungi in its mycorrhizal dependence. The bachelor's thesis describes O. insectifera, its occurrence in European countries (England and Ireland, the Netherlands, Serbia, Latvia, and Bulgaria), locations of its occurrence in the Czech Republic, and its risk factors. O. insectifera is considered the northernmost species of the genus Ophrys due to its occurrence in Norway. In all selected European countries, the distribution of O. insectifera is threatened. The threatening risks are: shading, rainy and cold climate, and sensitivity to ecological factors in the southernmost regions of its distribution. In the Czech Republic, O. insectifera was most often recorded on xerothermic grasslands of calcareous soil and in basophilic, more lighted parts of pine forests. The thesis also includes an overview of the recorded regions where O. insectifera was found in a particu- lar year. It has been established that the largest number of regions where O. insectifera was found was between the years of 1950 and 2000. This result may indicate the largest number of regions where O. insectifera population is currently...
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Revision and evaluation of sites with current and historical occurrence of critically endangered species \kur{Ophrys insectifera} L.Crantz in the vicinity of Ustek
BARCALOVÁ, Eliška
The topic of my master's thesis is a study of the vegetation of areas near "Úštěk", which is locale in north of Bohemia. Specifically location: Stráň mezi Dolními Řepčicemi a Záhořany/Stráň u Velkého Újezdu, Stráně u Drahobuzi, Stráně u Svářenic/U Malešova, Stráň u Vědlic, les Na Černčí, Bílé stráně u Litoměřic and V kuksu. The main objective was compare to the locations where the species formerly occured to locations with simultaneous concurrent and classify current plant communities and prepare relevés. It was also investigated the dependence of occurrence of the species O. insectifera on the following factors: the type of habitat, elevation, slope and exposure. It demonstrated the positive correlation species on slope was proved. Most exemplar (in 2015) occurred on a location Stráň Svářenic/U Malešova ( 140) and at least in location of Kuks ( 11). The output are maps of locations localizations incidence of the species. The current resultrs were compared with the surveys from previous years.
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