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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Reproductive form and function in trait-based plant ecology: from species to communities
 CSERCSÁNÉ VOJTKÓ, Anna
This thesis focuses on reproductive functional trait patterns across different spatial scales. The following sections document novel results and their relevance in modern plant functional ecological theory. The thesis evaluates evolutionary and environmental processes driving functional trait variability with a special focus on sexual and vegetative reproduction. First, the thesis provides a synthesis on the role of sexual reproductive functional traits in plant community assembly processes pointing to current knowledge gaps (Chapter I). Then, using publicly available databases as well as data from field measurements, the following sections aim at filling these knowledge gaps. On the species level, sexual reproductive traits are identified as one of the most important axes of variability in plant form and function (Chapter II). On the level of communities, functional and phylogenetic diversity is studied within and across different habitat types (Chapter III and IV).
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Biodiversity-productivity relationship in desmid communities
 Škvorová, Marie ; Škaloud, Pavel (advisor) ; Nedbalová, Linda (referee)
This thesis deals with biodiversity-productivity relationship in desmid communities. Biodiversity is found to be changing globally. The biodiversity-productivity relationship is therefore an important research topic. Three aspects of biodiversity are thought to play an important role: species richness, functional diversity and phylogenetic diversity. It is known that in general, productivity is positively correlated with diversity. Interactions between different metrics of biodiversity are known less. Existing studies have shown that these interactions might be present. In general, biodiversity-productivity studies were mostly focused on plants. Less is known about other organisms, including algae. In this work I explore the relationship between overyielding and functional or phylogenetic diversity on a species richness gradient of desmid communities. I conducted an artificial biodiversity- ecosystem functioning experiment using combinations of two to 12 desmid species. Communities differed in the diversity aspects. I had measured the biomass growth. For the analysis, I have used the overyielding index, which is based on a comparison of a polyculture production with the production expected based on monoculture yields. The relationship of overyielding on functional diversity depended on species...
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