|
|
Diversity of diving beatles in cultural landscape
EBERMANNOVÁ, Petra
Diving beetles (Dytiscidae) are the most speciose family of predatory aquatic beetles. This work consisted of a literature review of factors influencing the diversity of diving beetles in time and space and a field survey of diving beetles in various parts of vegetated littoral habitats of human-altered water bodies during the season. The survey took place at nine ponds near the villages of Třebín and Dubné and on the edge of the town of České Budějovice in spring, summer and autumn 2011. The results showed a preference of diving beetles for ponds with smaller amounts of fish, less nutrient supply and larger vegetation coverage. All these factors influence the abundance of diving beatles. One rare species, Hydrovatus cuspidatus, was found during the survey.
|
|
|
Differentiation of European Integration Process
Svobodová, Tereza ; Dubský, Zbyněk (advisor) ; Druláková, Radka (referee)
The main task of the thesis entitled Differentiation of European Integration Process is historical excursus into the development of the policy of differentiation and flexibility within the European integration member countries. The thesis points out the comparison of the speeches delivered by leading representatives that helped forming theoretical basis of this european policy. The thesis then also characterises the main models of differentiated collaboration and evaluates their present contribution and future utilisation. With help of theoretical foundings the thesis then analyses three particular examples of differentiation in existing European integration process.
|
|
| |
|
|
Diversity of the soil microbial community and its functional aspects in man-influenced environments
CHROŇÁKOVÁ, Alica
Diversity of the soil microbial community and its functional aspects were investigated in man-influenced environments, such as colliery spoil heaps in post mining sites and upland pasture used for outdoor cattle husbandry. The study was based on the cultivation of bacteria and streptomycetes as well as culture-independent approaches. Cultivated bacteria and streptomycetes were characterized by phenotypic and genotypic means. The culture-independent approaches were based on an analysis of environmental DNA in terms of both qualitative and quantitative parameters.
|
|
|
Diversity Management
Matějková, Kristýna ; Fučíková, Jana (advisor) ; Vernerová, Hana (referee)
The Bachelor`s Thesis is concerned with Diversity Management and its implementation in companies situated in the Czech Republic. The aim of the thesis is to at least partially answer the question, whether diversity of employees is managed in the Czech Republic, or not. Situation in companies had been monitored by personal dialogues with managers, personal observation and internet research. The findings based on this research are that neither of the chosen companies fully implemented Diversity Management and is successfully managing diversity of their employees.
|
|
|
Diversity management
Horázná, Eliška ; Fučíková, Jana (advisor) ; Stříteský, Marek (referee)
The thesis is focused on diversity management in the Czech Republic. The author deals with diversity of economically active population in the Czech Republic and also, based on the screening of websites of selected companies, analyses the extent to which companies in the Czech Republic deal with diversity management in the context of personal marketing. Emphasis is placed on how the studied companies present their approaches to diversity and whether it is also used in individual job offers. The aim is to prove that in the Czech Republic, the implementation of diversity management is relevant and also to map the approaches of selected companies to use of diversity management in their personal marketing. In conclusion the author summarizes the results of the conducted screening and creates suggestions for companies which have decided to deal with diversity management.
|
|
| |
|
|
Diversity of ectomycorrhizal fungi in beech forest \kur{(Fagus sylvatica)}
HEJNA, Ondřej
The objectives of this work described here were to summarize and evaluate current knowledge in ectomycorrhizal fungi with the intention at the colonization of root system beech Fagus sylvatica to ectomycorrhizal fungi. This work mainly was targeted at diversity of these ectomycorrhizal fungi in beech forest affected positive and negative by environmental and anthropogenic factors. Last part of this work describes qualitative and quantitative methods used in investigation of ectomycorrhizal fungi and their diversity.
|
|
|
Biodiversity of fish in selected inflows of water reservoir Lipno 1
SALON, František
Monitoring of fish populations was performed in the localities having normal natural pattern with minimum ratio of and violation by anthropogenic activity. Monitoring took place in 2009-2010 in two localities, the Pestřice Brook and the Hamerský Brook. Electrofishing was used for the actual mapping of fish populations and selected flows. Fishing took place upstream, within the whole width of the stream and the length of the section reached approximately 100 m. Caught fish and lamprey species were determined, their length was identified by means of a measurement board and, after documentation, they were carefully returned back to the stream. The assessed data provide basic information about the species structure of fish population and its nature, development of diversity and equitability, species abundance, dominance and size variability etc. The mostly fished species Salmo trutta m. fario, Perca fluviatilis and protected and threatened species Lampetra plameri, Cottus gobio, Lota lota, Phoxinus phoxinus.
|
|
|
Cytotoxicity and secondary metabolites of cyanobacteria
HROUZEK, Pavel
Cyanobacteria are well-known producers of secondary metabolites of different chemical structures and a wide range of biological functions. In the present thesis, the cytotoxic activity of cyanobacteria, originating from different habitats, was studied in order to reveal whether cytotoxicity is an environmentally dependent characteristic. In addition, the data were compared with the toxicity of these extracts to the model invertebrate Artemia salina. The obtained data suggest that cytotoxic cyanobacteria are favoured under some conditions and thus more frequent in particular localities. The majority of the studied extracts and fractions exhibited cytotoxitity to the Sp/2 cell line not accompanied by toxicity to A. salina. Moreover, in most of the strains with both activities to A. salina and Sp/2 cells the toxic effect was caused by an identical fraction. This result suggests that the toxic effect of the cyanobacterial secondary metabolites is mostly affecting basal cell metabolism rather than targeting specific organisms. In one of studied strains, Cylindrospermum sp. C24/1989, novel lipopeptides puwainaphycin F and G have been detected, isolated and their structure and biological effect have been characterized. Both of these structures interfere with eucaryotic membranes and cause a Ca2+ leakage into the cell. Subsequently, an enhanced tyrosine phosohorylation and relocalization of f-actin in the cell was observed. Lastly, the correlation between metabolite production and the reconstructed phylogeny was studied in planktonic Dolichospermopsis strains. Most of the detected compounds were found to be randomly disspersed across the reconstructed phylogeny and thus cannot be considered as good chemotaxonomic markers. This result also hampers the possible detection of toxic cyanobacteria by morphological methods or molecular detection based on the 16SrDNA gene.
|
guest ::
