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Autecological study of selected Cretaceous plants using stable Carbon isotopes
Zahajská, Petra ; Kvaček, Jiří (advisor) ; Diefendorf, Aaron (referee)
1 Abstract This thesis presents an analysis of fossil plants from the Cenomanian Peruc-Korycany Formation of the Bohemian Cretaceous Basin and from the Bückeberg Formation of the Lower Saxony Basin in Germany. Based on earlier studies, both areas provide sediments that are considered to have developed in tidally influenced fluvial systems. Studied fossil plants are represented by ginkgoalean plant leaves (Ertemophyllum, Tritaenia), branches of conifers (Frenelopsis) and lauroid angiosperms (Eucalyptolaurus). Frenelopsis, Eretmophyllum and Tritaenia are considered to be halophytic plants, while Lauroid angiosperms were considered to grow in fresh water conditions. The fossil plants were studied using cuticle analysis and two methods of stable carbon isotope analysis: Bulk carbon isotope analysis and Compound Specific Isotope analysis. For cuticle analysis samples were observed and documented macroscopically and microscopically. To specify the environmental conditions, recent samples from three salt marshes in Great Britain were studied and analysed using the same methods as the fossil samples. The data from all observations and measurements were processed and their interpretation supported the modelled environment based on the sedimentological data. Frenelopsis were growing in a haline environment with low...
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Hodnocení stavu mangrovových porostů ostrovů Panobolon a Yato, provincie Guimaras, Filipíny
Krahulcová, Veronika
This bachelor thesis focuses on the assessment of the status of mangrove stands on Panobolon and Yato islands in Guimaras province in the Philippines. The aim of the thesis is to compare the mangrove stands that were artificially planted after the oil accident in 2006 and the stands which underwent no or only partial planting. Data collection took place in August 2018 at three locations. The first location was on the island of Yato, another two ones were on the island of Panobolon. 15 experimental plots were established, where a total of 347 trees were measured according to the author's methodology. The result of the work is a comparison of individual sites and a list of all types of mangrove that were found on the plots.
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Diverzita epifytů v soukromé rezervaci Green Rezerva v Nikaragui
Jashari, Anna
The bachelor thesis is partially elaborated as a review of literature focused on a natural characteristics of Nicaragua, Green Reserva private reservation and on a basic characteristics of epiphytes. The main part of the thesis was conducted as a field survey of epiphytes on a research plots in Green Reserva, Nicaragua. Collected data analysis was carried out as an inventory of epiphytes within the part of a tropical rainforest and there was given an special attention to epiphytes occurring in mangroves. There were researched both types of the epiphytes - vascular and non-vascular. The result of the work is the list of all found epiphytic species depending on the dominant forest formations (tropical rain forest, mangroves). The bachelor thesis includes the quantitative and qualitative attributes of the epiphytes occurrence, particularly depending on the epiphytes species composition, location on the types of tree or palm and location within the tree height section.
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Autecological study of selected Cretaceous plants using stable Carbon isotopes
Zahajská, Petra ; Kvaček, Jiří (advisor) ; Diefendorf, Aaron (referee)
1 Abstract This thesis presents an analysis of fossil plants from the Cenomanian Peruc-Korycany Formation of the Bohemian Cretaceous Basin and from the Bückeberg Formation of the Lower Saxony Basin in Germany. Based on earlier studies, both areas provide sediments that are considered to have developed in tidally influenced fluvial systems. Studied fossil plants are represented by ginkgoalean plant leaves (Ertemophyllum, Tritaenia), branches of conifers (Frenelopsis) and lauroid angiosperms (Eucalyptolaurus). Frenelopsis, Eretmophyllum and Tritaenia are considered to be halophytic plants, while Lauroid angiosperms were considered to grow in fresh water conditions. The fossil plants were studied using cuticle analysis and two methods of stable carbon isotope analysis: Bulk carbon isotope analysis and Compound Specific Isotope analysis. For cuticle analysis samples were observed and documented macroscopically and microscopically. To specify the environmental conditions, recent samples from three salt marshes in Great Britain were studied and analysed using the same methods as the fossil samples. The data from all observations and measurements were processed and their interpretation supported the modelled environment based on the sedimentological data. Frenelopsis were growing in a haline environment with low...
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