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The Importance of the northern Black Sea for the Byzantine Empire in the 6th- 10th centuries. Economic and military significance of the city of Cherson.
Čechová, Martina ; Vavřínek, Vladimír (advisor) ; Shepard, Jonathan (referee) ; Štefanovičová, Tatjana (referee)
The main topic of the thesis is the city of Cherson, which has been under excavation mainly by Russian or Ukrainian researchers for more than 180 years. Due to a difficult political situation, the area was not accessible to other scholars till 1993. Therefore, most of the books or articles were published in Russian and have not been widely spread among western researchers. The first two chapters of the dissertation deal with the sources and the history of research. The main body of the dissertation is divided into three parts: (chapter 3) From the end of the Roman times till the early Middle Ages (5th - mid-7th centuries), (chapter 4) The Dark Ages (mid-7th - mid-9th centuries), (chapter 5) The new era of prosperity (mid-9th - end of the 10th century). The third chapter is devoted to the time when the era of Antiquity was slowly coming to its end and the development proceeded to the Middle Ages, in this case to the early Byzantine period. The fish industry and fish processing will be discussed because these activities which had begun here in the Roman times continued in the Byzantine period, too. Afterwards, the beginnings and spread of Christianity are debated. Furthermore, the beginnings of Christianity in Cherson are described, likewise the building activities, which resulted in transformation...
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Taxonomy of selected groups of the genus \kur{Caloplaca}
ŠOUN, Jaroslav
The thesis deals with phylogeny, taxonomy and nomenclature of selected groups of the lichen genus Caloplaca. Particularly, the C. cerina group was closely investigated using molecular methods (ITS sequences), morphology and chemistry, based on material from Europe, and to some extent also from North America and western Asia. This approach resulted in the description of three new species (C. sterilis, C. subalpina, C. thracopontica), and detected an unexpected richness of lineages. Nomenclature, taxonomy, morphology and ecology of C. aurantia and C. flavescens from the C. aurantia group were studied in detail, including selection of the neotype of the former species. Their distribution was reviewed for the territory of the Czech Republic. Poorly known taxon C. aurantiomurorum from Algeria was lectotypified and synonymized with C. aurantia. Apart from the two groups, C. phlogina and C. scythica, differing partly in thallus colour and distinctly in distribution, were examined using both molecular (ITS sequences) and phenotypic data and found to be conspecific.
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