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Oyster bioherms in the Bohemian Cretaceous Basin
Rantuch, Jakub ; Košťák, Martin (advisor) ; Frank, Jiří (referee)
Frustration from shape and size variability of oyster's species Rhynchostreon suborbiculatum (Lamarck) is long known phenomenon. In current state of his systematic it is not possible to consider it fully satisfying. Is it is shown in study of genus Gryphaea by Jones and Gould (1999), that application of modern analytical methods, undoubtly lightens long-darkned places of evolution process. Idea of Videt and Neraudeau (2003), that shape variability of Rhynchostreon suborbiculatum (Lamarck) probably also mirrors heterochronic processes, introduces inspirative and good foundation for future research in this field. Occurence of this oyster is proved from huge range of sites in Bohemian Cretaceous Basin area. It is combination of rich occurance, unique preservation and variability of lithological settings, which gives us unique starting point for next step to solve significant problem. Based on population analyses consisting of biometrical studies supported by oxygen isotope analyses, in future, it will be possible to reach sufficient conclusions of this issue, and progress in our knowledge.
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History of vegetational development in the Cheb basin from sedimentary record of the SOOS National Nature Reserve
Suda, Tomáš ; Kuneš, Petr (advisor) ; Bešta, Tomáš (referee)
Vegetation development in the Cheb basin ( W Czech Republic) recorded in the sediments of the SOOS ational ature Reserve This thesis focuses on palaeoecological research of quaternary sediments in the Soos National Nature Reserve (Cheb basin, NW Czech Republic). Quaternary history of this locality is poorly known, despite it is a valuable and protected area with high natural qualities. The Soos basin is also known for its unique geological record, which is expected to cover information on landscape dynamics at least during the Holocene. A lake existed in the Soos basin enabling accumulation of diatomite and peat sediments of a broad palaeoecological potential. Records were analysed with method of pollen analysis and were dated using 14C. The results of this study bring information about vegetation development in the area of Cheb basin as well as development of lake ecosystem. It also gives a new insight on lake's origin and its age. The accumulation of peat sediments started in the Preboreal period and was continuous at least until the Atlantic following with a hiatus, therefore further detection of vegetation development is impossible. The beginning of diatomite accumulation, as well as the existence of the lake goes back to the Bølling interstadial, according to radiocarbon dating. However, this...
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Scientific reconstruction of the fossil marine amniots
Cettl, Karel ; Mazuch, Martin (advisor) ; Ekrt, Boris (referee)
To create a good scientific reconstruction is important artistic skills and knowledge of history painting of prehistoric animals, and also knowlages in the anatomy, zoology, palaeontology, palaeoecology and also biomechanics. Reconstruction It stands on the borderline between art and science. Our view on the fossil marine Amniotes change over time with advancing skeletal findings, and also changed a scientific reconstruction. Although the actual outputs, such as reconstruction and in particular 3D models can explain a number of new or unexplained informations about this group. A reconstruction expert can not only beautify their actions, but also enthance scientific knowledge, or even to outline a new direction for further research. Keywords: Scientific reconstruction, fossil marine amniotes, adaptation, anatomy, evolution, palaeoecology, biomechanice, 3D models, trends.
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Palaeocology of plant-arthropod associations from the Lower Miocene of the Most Basin in northern Bohemia (Czech Republic)
Knor, Stanislav ; Prokop, Jakub (advisor) ; Teodoridis, Vasilis (referee)
Terrestrial plants and insects account for the majority of the Earth's biodiversity today, and almost half of all insect species are herbivores. Thus, insects and plants share ancient associations date back for more than 400 million years. However, investigation of their interactions stands largely at the beginning in Western Europe. Nearly 4300 plant remains showing various kinds of feeding damages are available for the present study. These trace fossils are classified as so-called functional feeding-groups supply an outstanding example of the complexity, the structure and the changes of terrestrial ecosystems, are not well known during this interval. In Europe, the Neogene is characterized by palaeogeographic re- organization due to the collision of the African with the Eurasian plates. The Neogene plant record in Europe is rich and diverse offering a profound large-scale understanding of the floristic and vegetational development. A database of fossil traces from the Most Basin was compiled and analyzed by various statistical methods in terms of the diversity and intensity of palaeo-herbivory. The primary objective is to present results on the development of insect herbivory through the section of the Bílina Mine in North Bohemia, with the aim of understanding principal factors that caused the...
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Scientific reconstruction of theropod dinosaurs
Cettl, Karel ; Mazuch, Martin (advisor) ; Marek, Jaroslav (referee)
To create a good scientific reconstruction is important artistic skills and knowledge of history painting of prehistoric animals, and also knowlages in the anatomy, zoology, palaeontology, palaeoecology. Reconstruction of theropods dinosaurs became the royal discipline of professional illustration. It stands on the borderline between art and science. Our view on theropod dinosaurs has changed over time with advancing skeletal findings, and also changed a scientific reconstruction. Keywords: theropods, scientific reconstruction, anatomy structure, palaeoecology, Carnotaurus sastrei.
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Sborník abstraktů ze 4. mezinárodní. konference o bioerozi
Forty-four international contributions on bioerosion from the fossil record and from modern settings show that the first intensively bioturbated substrates were carbonate hardgrounds, soon followed by carbonate bioclasts. By the end of Paleozoic, wood bioerosion starts to take place; marine bioerosion in lithic substrates have much diversified during the Cretaceous and Cenozoic. The set of extended abstracts also shows increasing interest on mammals as tracemakers, and on bioerosion on non-marine settings.
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