This diploma thesis presents the topic of the invasive alien plant species with an emphasis on their growth in construction pits. In our case, we studied these species in the abandoned construction site Bežigrajski dvor, Krater. The pit is one of the functionally degraded areas, where ruderal habitats are frequent. An above-average number of pioneer and invasive plant species usually grow in them. Individual parts of the pit differ considerably depending on the site conditions and human influences, which reflects in vegetation type and growth density. We studied the vegetation using the method of detailed mapping. By identifying individual subunits, we wanted to get an insight into the spatial distribution of selected factors, which we anticipated to have an impact on vegetation. Beside the past human activities within the area, we found the slope of the surface is very important, as it affects the thickness of the soil. Steep slopes with a shallow soil layer form modest habitats on which native pioneer species grow very well. Consequently, fewer invasive plant species grow there. Invasive plant species grow most densely around the largest and firstly planted specimen of their kind.
|
