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Tracing Microendolithic Ichnocenoses: A paleoecological and taphonomic approach over the Phanerozoic
Herenio Kerkhoff, Marta Leticia ; Holcová, Katarína (advisor) ; Skupien, Petr (referee) ; Soták, Ján (referee)
The microbial endoliths study from the Western Carpathians region was a semi-quantitative survey that included six sampling localities. Samples, ranging from Upper Oligocene to Miocene (Serravalian), came from three localities in Czechia (Mikulov, LOM-1 and Hevlín), two in Slovakia (DNV and LKŠ) and one place in Hungary (Tard Clays, Rozalia Quarry). The main goal of this project was to verify how different levels of hypoxia, established for studied intervals, would affect the microendolilthic assemblages present in tests of benthic foraminifera. Additionally, microbial activity and byproducts, and the overall interplay between bioerosion and bioprecipitation are also analysed. The degree of hypoxy was established using ratio of oxic/dysoxic and hypoxic foraminifera, defined as Benthic Foraminifera Oxygen Index (BFOi) Sampled index shows a predominance of dysoxic indicators, with rare oxic elements. Secondary electron elemental analysis (EDX) reveals a significant enrichment of sulphur, phosphorus and iron in biofilm samples from DNV and Hevlín, when compared to the rock matrix surrounding it. Resin casts reveal a predominance of Dysphotic to Deep Euphotic zones ichnocenosis, with a predominance of Chlorophyte, Rodophyte and heterotroph burrows. Few representatives of Cyanobacteria traces, such as...
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Holocene shallow-water foraminiferal assemblages from Zanzibar
Česáková, Klára ; Holcová, Katarína (advisor) ; Chroustová, Markéta (referee)
This thesis builds on the project GAČR 23-05217S, prof. RNDr. Katarína Holcová, Ph.D.,The Fossil seagrass meadows- the neglected Phanerozoic ecosystem: its contribution to the shelf biodiversity and identification in the fossil record. This work consists of two parts, the compilation and the practical part. The compilation focuses on the Foraminifera, their morphology, history, and significance for science. Following the practical part, the shallow-water foraminifera from the tropical part of the Indian Ocean are presented here. In the practical part, I deal with the documentation and analysis of two samples taken from the west coast of the Unguja Island (Zanzibar) from the Zanzibar channel (5.9916858S, 39.1855394E). This locality is from the micropaleontological point of view poorly researched. The main outcome is taxonomical identification and subsequent interpretation of the paleoenvironment based on the determined species. Key words: Foraminifera, Zanzibar, Holocene, seagrass meadows
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Biostratigraphical value of the Mediterranean planktic foraminifera.
Škrátek, Matej ; Holcová, Katarína (advisor) ; Kopecká, Jitka (referee)
The first part of the work deals with the general biology of planktonic foraminifera, shell morphology, and ecology. The following section concerns the middle Miocene period and its biostratigraphic division into biozones based on planktonic species in subtropical areas and the Mediterranean region. The next part includes a brief overview of chemostratigraphy using strontium and its use in dating. The practical section includes dating methods based on biostratigraphy and chemostratigraphy, and their subsequent use in dating samples from southern Spain. The final part summarizes the results of both methods and their interpretation.
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Calcareous nannofossils assemblages for provenance analysis of European paintings: From the sample preparation to the assemblage comparison
Jaques, Victory Armida Janine ; Holcová, Katarína (advisor) ; Caruso, Francesco (referee) ; Oszczypko-Ciowes, Marta (referee)
This PhD thesis is a commentary of four studies published and a fifth study submitted in peer reviewed and impacted scientific journals. Three studies are methodological work for the preparation of painted micro-samples to improve the measurements accuracy, the samples visualisation, and the combination of measurements methods. The two other papers focus on the fossil assemblages determination and comparison between reference historical areas and original paintings. This work is divided into three main parts, namely the introduction, the methods, and the calcareous nannofossils assemblages. In the introduction, detailed explanations are given about the paintings, historical materials, trade roads, what are nannofossils, how and why to use them. In the methods section, developed preparatory methodologies are summarised, and the most important results are explained. In the third part, the nannofossils assemblages, the differences between the assemblages from different areas in Europe compared to original paintings are explained and correlated to the literature. The impact of the preparatory methods on the results is discussed, and a conclusion is drawn from it in the context of painted artefacts in the Cultural Heritage field are unique, and so are the micro-samples from them. To extract most...
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Ethicotherapy in the concept of Ctibor Bezděk. Problems of human moral life and health.
Holcová, Katarína ; Fošum, Jan (advisor) ; Sousedík, Prokop (referee)
Ethicotherapy in the concept of Ctibor Bezděk. Problems of human moral life and health. Abstract The aim of the diploma thesis is to point out the connections between the moral life of a person and his state of health. This is a current topic of applied ethics, which deals with the relationship between ethical behavior and its consequences in health and disease therapy. The work deals with the life and work of Ctibor Bezděk, who is considered by the professional public to be the founder of ethics therapy. The diploma thesis introduces the concepts of ethics therapy and tries to bring the meaning of his work to the present day with an understandable approach. The diploma thesis also points out the importance of moral balance in various areas of our lives, the role of faith in God and the trust we place in him in the dynamics of health and disease. The method used in the diploma thesis is the analysis of Ctibor Bezděk's texts, the systematic arrangement into the topic of the thesis and the updating of his legacy. Key words: ethics, ethicotherapy, prayer, morality, illness, suggestion, healing, evil Počet znaků (včetně mezer): <111 295>
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Radiolaria of the Bohemian Cretaceous Basin
Müllerová, Petra ; Holcová, Katarína (advisor) ; Vajskebrová, Markéta (referee)
The first part of work deals with cell structure, shell morphology, reproduction and nutrition. Also the ecology and systematical subdivision of radiolarians are described here. The systematical subdivision depends on differences in shell morphology of individual forms. The next part is devoted to Cretaceous radiolarians with focus on Cenomanian and Turonian ones, also some examples from several locations around the world is located here. The last part of this work deals with geology of Bohemian Cretaceous Basin, where the study of radiolarians from certain site will continue in master thesis.
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Foraminifera of the Bohemian Cretaceous Basin
Hašková, Barbora ; Holcová, Katarína (advisor) ; Frank, Jiří (referee)
The thesis deals in the compilation part with systematic classification, biology, morphology of the test, ecology and palaeoecology of the Foraminifera. Next research focuses on the history of Cretaceous Foraminifera in our area and the geology of the Bohemian Cretaceous Basin, focusing on Úpohlavy site in the northwestern part of the Bohemian Cretaceous Basin. Three samples from Úpohlavy section were preliminary micropaleontologically analysed. Plankton / bentos ratio was counted. Genus Heterohelix and Planoheterohelix was described and taxonomically studied. Keywords: Upper Cretaceous, Bohemian Cretaceous Basin, Foraminifera, Heterohelix 1
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Problems of the K/T boudary
Pícha, Štěpán ; Košťák, Martin (advisor) ; Holcová, Katarína (referee)
Mass extinction attracts the attention of scientists for a long time. Particularly examined in detail the extinction at the Cretaceous/Tertiary boundary, took place from 65.9 + -0.4 millionyears. There are numerous theories which try to explain the causes that led to the youngest of the five major extinctions in Earth history. Since 1980, when the iridium anomaly has been recorded in sediments , the theory of extraterrestrial cause of the extinctions caused by meteorite or comet was introducet. This theory has partly been confirmed by the findings impact crater in the Gulf of Mexico. Further examination, however, proved that the crater quite significantly precedes the boundary. Attention therefore has turned in another direction,i . e. the terrestrial cause of extinction. More recent scientists pay attention to present-day India and huge volcanic traps that created the Deccan platform.During the examination of the Deccan traps, the unexpected an impact crater structure, which is several times larger than the crater in the Gulf of Mexico, has been discovered This discovery started anew dispute about the main cause of the extinction at the Cretaceous / Tertiary boundary. Based on modern literature, the three major theories of the K/T extinction are discussed. I have tried to focus their causes,...
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