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Study of ecosystem impact of giant hogweed (Heracleum mantegazzianum) invasion
Hladík, Marek ; Pergl, Jan (advisor) ; Hadincová, Věroslava (referee)
The present study deals with ecological impact of giant hogweed (Heracleum mantegazzianum) invasion in Slavkovský les area. Being one of the prominent invasive species with significant impact on human health it has been subjected to a wide research. In spite of that little is known about its impact on the invaded ecosystem. My research was therefore focused on analysis of the ecosystem impact, particulary 1) microclimatic measurements of temperature and soil moisture and their comparisons between invaded and noninvaded vegetation, 2) comparison of germination and survival of model plant species sowed into invaded and noninvaded plots and 3) study of the effect of H. mantegazzianum presence on model species seed production. Results have shown significant alteration of microclimate due to H. mantegazzianum invasion. Further research is needed to resolve what impact it may pose to species in invaded communities. The effect of Heracleum mantegazzianum presence on germination and survival of model species was not significant. Similarly, seed production of model plants was not significantly affected.
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The effects of historical disturbances on current vegetation and invasive plant Heracleum mantegazzianum in the Slavkov forest
Breburdová, Vendula ; Pyšek, Petr (advisor) ; Münzbergová, Zuzana (referee)
The thesis deals with the differences in floristic composition of the vegetation in abandoned villages in the Slavkovský les forest and surrounding open landscape. Due to complex historical events, the villages were abandoned and demolished by the army. Vegetation survey took place in 13 completely destroyed villages, and since the vegetation in villages consists of a mixture of woody and treeless cover, the reference vegetation in the surroundings was selected to include both types of habitats. Total number of species, number of families, Ellenberg indicator values, number of archaeophytes and neophytes and representation of life forms were compared for the floras of villages and their surroundings. The flora of villages had more neophytes, phanerophytes and higher indicator values for nutrients and soil reaction. Species' positive fidelity and percentage frequency were calculated from the synoptic table. Indirect ordination plot (NMDS) and PERMANOVA test confirmed the differences between floristic composition in destroyed villages and their vicinity. The second part of the thesis explores the differences between floristic composition of plant communities by Heracleum mantegazzianum in the same two types of habitats. Based on 50 phytosociological relevés, the total number of species, number of...
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The effects of historical disturbances on current vegetation and invasive plant Heracleum mantegazzianum in the Slavkov forest
Breburdová, Vendula ; Pyšek, Petr (advisor) ; Münzbergová, Zuzana (referee)
The thesis deals with the differences in floristic composition of the vegetation in abandoned villages in the Slavkovský les forest and surrounding open landscape. Due to complex historical events, the villages were abandoned and demolished by the army. Vegetation survey took place in 13 completely destroyed villages, and since the vegetation in villages consists of a mixture of woody and treeless cover, the reference vegetation in the surroundings was selected to include both types of habitats. Total number of species, number of families, Ellenberg indicator values, number of archaeophytes and neophytes and representation of life forms were compared for the floras of villages and their surroundings. The flora of villages had more neophytes, phanerophytes and higher indicator values for nutrients and soil reaction. Species' positive fidelity and percentage frequency were calculated from the synoptic table. Indirect ordination plot (NMDS) and PERMANOVA test confirmed the differences between floristic composition in destroyed villages and their vicinity. The second part of the thesis explores the differences between floristic composition of plant communities by Heracleum mantegazzianum in the same two types of habitats. Based on 50 phytosociological relevés, the total number of species, number of...
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Study of ecosystem impact of giant hogweed (Heracleum mantegazzianum) invasion
Hladík, Marek ; Pergl, Jan (advisor) ; Hadincová, Věroslava (referee)
The present study deals with ecological impact of giant hogweed (Heracleum mantegazzianum) invasion in Slavkovský les area. Being one of the prominent invasive species with significant impact on human health it has been subjected to a wide research. In spite of that little is known about its impact on the invaded ecosystem. My research was therefore focused on analysis of the ecosystem impact, particulary 1) microclimatic measurements of temperature and soil moisture and their comparisons between invaded and noninvaded vegetation, 2) comparison of germination and survival of model plant species sowed into invaded and noninvaded plots and 3) study of the effect of H. mantegazzianum presence on model species seed production. Results have shown significant alteration of microclimate due to H. mantegazzianum invasion. Further research is needed to resolve what impact it may pose to species in invaded communities. The effect of Heracleum mantegazzianum presence on germination and survival of model species was not significant. Similarly, seed production of model plants was not significantly affected.
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