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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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