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Invasive alien plants in Trebonsko region
Volfová, Barbora ; Vardarman, Johana (advisor) ; Naděžda, Naděžda (referee)
The Bachelor's thesis deals with the issue of invasive plant species. Following invasive plant species were mapped in the South Bohemian region of Třeboň: Canadian goldenrod (Solidago canadensis), Giant goldenrod (Solidago gigantea), Bohemian knotweed (Reynoutria x bohemica), Japanese knotweed (Reynoutria japonica), Sakhalin knotweed (Reynoutria sachalinensis) and Himalayan balsam (Impatiens glandulifera). The goal of this thesis was to map the above-mentioned species in one part of Stropnice Site of Community Importance and its surroundings. Furthermore, the thesis also aimed to record the most frequently colonized biotopes according to the invaded locations. The results show that Canadian goldenrod colonized seventeen locations and therefore it is one of the most invasive species. Next, Himalayan balsam was found in seven locations and Japanese knotweed in five locations. Last, Bohemian knotweed and giant goldenrod each colonized only one location. In this area, such species most often invade biotopes affected by people and locations near water resources. The plants also grow mostly in wet localities.
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Invasive alien plants in Trebonsko region
Vaněčková, Kateřina ; Vardarman, Johana (advisor) ; Justová, Helena (referee)
This thesis focuses on the issue of invasive plant species around the Stropnice Special Area of Conservation located in the region of Třeboň.
The aim of this thesis was to map following invasive plant species: Canadian goldenrod (Solidago canadensis), Giant goldenrod (Solidago gigantea), Japanese knotweed (Reynoutria japonica), Sakhalin knotweed (Reynoutria sachalinensis), Himalayan balsam (Impatiens glandulifera) and Giant hogweed (Heracleum mantegazzianum).
The locations of the above-mentioned species were mapped using GPS. The data were then digitized and map outputs were created using the ArcGIS 10.2.2 program. These outputs identified the expansion of the invasive plant species.
The results showed that giant hogweed is not located in the mapped area, but the other mapped invasive plant species were found there. These species most often invaded the biotope of mesic Arrhenatherum meadows (T1.1), followed by
tall-sedge beds (M1.7) and anthropogenic areas with sporadic vegetation outside human settlements (X6).
The problem of invasive plant species can be solved by their removal and by educating the general public about the risks these plants pose.
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Occurrence of Himalayan balsam (Impatiens glandulifera) in PLA Labske piskovce
Řezník, Jan ; Vardarman, Johana (advisor) ; Naděžda, Naděžda (referee)
For several decades is Europe, as well as many other parts of the world, suffering by invasion of Himalayan balsam (Impatiens glandulifera), while mapping of its occurrence has become an integral part of a successful fight with it. For this purpose, the mapping of the plant was carried out in the Site of Community Importance, the Elbe valley in the Northern Bohemia. It was processed by locating of GPS coordinates and subsequent data processing by GIS tools. The aim was firstly to find and interpret the degree of invasion in our area of interest, and also to assess it qualitatively, based on biotopes, where it has occured. As a result, we got a database of information, which along with the mapping outputs, points to fact that major occurrence of Impatiens glandulifera is close to watercourses and human settlements, esspecially in habitats with ruderal vegetation. The work can be used as a source of information for planning and management in the area.
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