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Ecology of Gemmatimonadota
MUJAKIĆ, Izabela
Phylum Gemmatimonadota is a common group present in many natural environments. Yet, this interesting bacterial group is rarely studied. Since its discovery 20 years ago, only six cultured species have been described. Abundances of Gemmatimonadota in various environments are usually low (<1%), with the exception of soils, where they are one of the more abundant phyla. Probably for this reason, at the onset of this work, most of the knowledge about Gemmatimonadota came from studies of soil environments, while information about their ecology in freshwater lakes was missing. An interesting discovery relating to the unexplored diversity of Gemmatimonadota in freshwaters was the isolation of the first phototrophic member of this group, Gemmatimonas phototrophica, which was cultured from a shallow freshwater lake. To learn more about the ecology of Gemmatimonadota in freshwaters, the main focus of this thesis was the analysis of their distribution and diversity in several freshwater lakes, with emphasis on presence of photoheterotrophic Gemmatimonadota. The potential ecological roles of this group, metabolic capabilities and general genomic characteristics have also been addressed, thereby allowing a broader scope comparison with Gemmatimonadota from other environments such as soil, marine waters, or wastewaters.
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Knowledge of primary pupils about ecology of freshwater
DILLINGEROVÁ, Lenka
This master thesis deals with conceptual knowledge of pupils of the primary school about the ecology of the freshwater ecosystem. Pupils get familiar mainly with typical representatives of organisms which are representing the ecosystem, however, understanding the ecology of the ecosystem demands having a deeper insight into many functions and relations characteristic for the specific ecosystem. The author emphasises the importance of the lessons being carried out through educational programmes in nature. A specific educational programme was designed and realised. Then, the knowledge of pupils of the 1st and 2nd grade was tested and compared on the basis who took part in the programme and who did not. In some tasks, a positive impact of the educational programme was achieved. In other tasks, the same or slightly better results were shown by pupils, who did not participate in this specific programme. In the thesis there are discussed factors, which influence the success rate of the educational programme and pupils' understanding of ecologic relations.
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