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Distribution and selected ecological characteristics of \kur{Echinocystis lobata}
MÜLLEROVÁ, Anna
Echinocystis lobata is an European invasive species introduced from North America. Distribution of Echinocystis lobata was studied in the Pilsen region alongside main rivers, including Berounka, Úhlava, Úslava, Mže and Radbuza. The maps of distribution were created from information acquired from literature and field exploration. The germination experiments were conducted in climabox and garden experiments.
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Biological flora of Wild Cucumber (\kur{Echinocystis lobata} Torr. et A. Gray)
KUČEROVÁ, Radka
The thesis deals with biological flora of Wild Cucumber (Echinocystis lobata Torr. et A. Gray). The first chapter is directed to the systematic classification, further work deals with morphology, distribution, habitat conditions, life cycle, relationships with other organism and problems of invasion. Invasion is currently topical problem, because it occurs to force out of original species of plants.
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Ecological study of invasive species \kur{Lupinus polyphyllus}
HURTOVÁ, Jaroslava
Species Lupinus polyphyllus is one of the most hazardous invasive species in the Czech Republic and its increasing occurence represents a threat of native biodiversity not only in the flora of conservation areas. Influence of management experiments on invaded communities was studied on permanent plots founded on three localities in the Šumava National Park. The role of nitrogen fixed in this invasion was explored by analyzing of soil samples. Influence of allelopathic inhibition of invasive species on some coexisting native species was tested in the laboratory experiment.
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Surveying of the \kur{I. glandulifera} and \kur{I. parviflora} occurrence on the chosen section of Želivka river.
URBAN, Miroslav
The aim of the study was to write a review of research literature on the invasion and in parallel to carry out research work on the subject myself. In the study I chose to focus two species of the genus Impatiens, namely I. glandulifera and I. parviflora. Then I chose a 7 km long stretch of the river Želivka in the Czech-Bohemian highlands to study and survey the population of these two species and plant association. Consequently I focused my study on the river biotope and the role of invasive species in it. It is known, that I. glandulifera and I. parviflora are invasive species which tends to cause disruption to native biotopes. The former forms homogenous arrays near river banks, the latter forms this arrays in forests. In my study I examined the following questions: a) Do river and brook plant association differ in species? b) Which species are correlated with I. glandulifera and I. parviflora and which composition species occur most frequently with the subject species? c) Have different level of shading any impact on species composition? I tested these hypotheses using Statistica 8 (Statsoft Inc. 2007) and CANOCO (ter Braak and Šmilauer 2002) programs. The conclusion is that river and brook plant association differ in species composition. River plant association is lower in plant diversity (Shannon-Wiener index is 0,7; Z = -2,82208, p = 0,004772). Species correlated with I. glandulifera and I. parviflora are detailed on Fig. 7., 8., 9., and 12. The last finding was that different level of shading have impact on species composition in river and brook plant association (Z - Tab. 6, p = 0,0002).
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Pseudotsuga menziesii, the new potential invasive species in the České Švýcarsko National Park?
DUDÍKOVÁ, Tereza
Pseudotsuga menziesii, naturalized conifer from the North America, has been planted in the area of the present-day České Švýcarsko National Park (Czech Republic) from 19th century. These surveys concentrate on the question of environmental preferences of seedlings and saplings of Pseudotsuga, and characterize potential distance distribution of this tree. In conclusion, Pseudotsuga is still only naturalized species, but danger of becoming to be invasive is very high.
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