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Chrysophycean cysts and scales in paleolimnological studies
Bartošová, Kateřina ; Němcová, Yvonne (advisor) ; Škaloudová, Magda (referee)
This thesis deals with chrysophyte scales and stomatocysts as useful tool of paleoecological reconstructions in lake ecosystems. In the first part the geological physical and biological aspects of lake reconstructions are described. The second part contents information about chrysophyte taxa and their utilisation as paleoekological indicators. Chrysophyte microphosils include two major groups of siliceous indicator: stomatocysts and sculptured and ornamented species-specific scales. Using surface-sediment training sets, quantitative inference models have been constructed for eutrophication, acidification, air-born pollution, salinification, climatic change, and other environmental changes. This thesis represents a literature review.
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Observation of annual water level changes on lakes in High Tatra Mts.
Sankotová, Tereza ; Šobr, Miroslav (advisor) ; Janský, Bohumír (referee)
The presented thesis deals with annual lake level fluctuation in the High Tatra Mountains. It focuses on the related issue of the hydrological regime of lakes and the process of observation of level fluctuation depending on the genetic type of a lake. On the basis of the available literature, the thesis aims to determine the causes of annual changes in the level fluctuation and to compare these with other alpine lakes. The findings are applied to the lake level fluctuation data originating from the Skalnaté pleso and Hincové Oká. Through a comparison of level fluctuation of lakes in the High Tatra Mountains and the Šumava Mountains significant differences in the annual running of lake levels were found. By contrast, the comparison with the lakes in glacial area, whose hydrological regime is dependent on other physical-geographical factors, show that the annual running level fluctuations are similar. Key words: High Tatra Mountains, lake, hydrological regime
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Phytoplankton of the Tatra lakes: factors influencing taxonomic composition and biomass
Červenková, Lenka ; Nedbalová, Linda (advisor) ; Štefková, Elena (referee)
The aim of this diploma thesis was to describe species composition and biomass of phytoplankton in the Tatra Mountains lakes (Slovakia, Poland) and environmental factors influencing them. The surface layer of 89 lakes was sampled in September 2004. Flagellates from Chrysophyta, Dinophyta and Cryptophyta most frequently dominated the phytoplankton biomass. Lake in the same valley usually differed in their dominant taxonomic group as a result of different lake morphometry, catchment type and detailed geological structure. Based on the level of phytoplankton biovolume, the majority of lakes were ultraoligotrophic and oligotrophic, however, mesotrophic and even eutrophic conditions were recorded in some forest and meadow lakes. An allometric relationship between phytoplankton biomass and chlorophyll a was revealed. Specific chlorophyll content did not differ among taxonomic groups. Altogether 233 species were determined, the most diverse group were Chlorophyta. Species richness of lake was 3-46 and it was negatively correlated with altitude and positively correlated with lake area. The majority of species were rare both in term of biomass and number of lakes occupied by a particular species. Average local species biomass was positively correlated with regional distribution. The similarity of species...
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The use of diatoms (Bacillariophyta) in paleolimnology
Aubrechtová, Martina ; Píšková, Anna (referee) ; Kulichová, Jana (advisor)
This thesis is a literature review summarizing methodology and the possibility of use of diatoms (Bacillariophyta) for paleoecological reconstructions of extinct lacustrine ecosystems. In addition, the theoretical part of the thesis is devoted to basic characteristics, evolutionary history and ecology of the group, lakes and the fossil record. In the practical part, two samples of sediments of a fossil lake that has been discovered and studied within the Morava Project in Strážnické Pomoraví are compared.
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Detached house on a lake
Sedláčková, Markéta ; Vránová, Lenka (referee) ; Kacálek, Petr (advisor)
The subject matter of my Bachelor thesis is the project of a new single-family detached house situated on a lake. The building has two over-ground floors and is covered by a flat double-coated roof. Spacious terraces accessible from both the first as well as the second floor are the integral parts thereof. Vertical load bearing and non-load bearing walls are designed from Porotherm walling system. Horizontal load bearing ceiling constructions are designed from an iron-concrete construction. The load bearing first floor terrace construction shall consist of a welded steel construction. The large diameter piles foundation construction is designed from an iron-concrete construction. The wall footing construction of piles, load bearing pillars and slab floating the building construction is designed from underwater iron-concrete construction. The project emphasizes the layout plan, thermal technical properties and safety in use.
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Fish detection with modern sonar systems
TUŠER, Michal
This dissertation thesis was focused on improving the methodology to detect fish with modern sonar systems in lakes and reservoirs. The first part of the thesis is aimed to the vertical beaming acoustics with a key focus on the acoustic dead zone and its practical solution. The second part deals with the fish orientation in reservoir?s open waters and its consequences in horizontal beaming acoustics. The last one dedicates to the DIDSON multi-beam sonar and its reliability in detection and sizing of fish.
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