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Population - ecological study of invasive species \kur{Lupinus polyphyllus} in the Bohemian Forest
HURTOVÁ, Jaroslava
Lupinus polyphyllus Lindl. is one of the most dangerous invasive species in the Czech Republic and its increasing occurence is a threat of biodiversity of natural plant communities not only in the Bohemian Forest. Exploration of facts of invasive species problems was worked up. Species spread in area of the National Park Šumava was traced and put in GIS layer with record of habitat features (abundance per population and nature of biotope) that was consequently analysed. Surroundings of the seed germination were found. Influence of the seed germination and seedling survival on the altitude were studied. Enduring areas for management experiments were founded on the three localities in the Bohemian Forest for future research.
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Adventitious sprouting of short-lived plants in natural populations
MALÍKOVÁ, Lenka
Disturbance is one of most important selective factor causing removal of plant biomass. Man-made habitats are characterized by strong and unpredictable disturbances, providing bare soil surface colonized by plants with short life cycle. Populations of the short-lived plants are, however, vulnerable to the strong disturbance removing all stem parts with reserve axillary meristems in the case it occurs before plant flowering and fruiting. Nevertheless, 2 % of annual and 14 % of biennial plants are able to overcome meristem limitation by adventititous sprouting from hypocotyle or/and roots. This thesis is composed of four original studies describing the occurrence of adventitious sprouting in natural populations of 22 monocarpic weeds of Central Europe and one species in Indonesia. The studied phenomenon was analyzed in relation to various environmental factors and plant traits in the field and in experimental conditions.
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Vegetation of heat pipelines and participation of invasive species
SVĚTLÍKOVÁ, Petra
Both climate change and plant invasions are phenomenons affecting vegetation structure and its functioning. This study compares vegetation of heat pipelines with surrounding vegetation and investigated survival of thermophilic species in the zone on heat pipelines. Reactions of plants on global warming, including possible invasive behaviour of alien species, are briefly discussed.
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