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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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The importance of clearings on plant communities in Podyjí National Park
Pusztaiová, Zuzana ; Münzbergová, Zuzana (advisor) ; Macek, Martin (referee)
In this thesis I deal with various aspects of influence of clearings on plant communities in NP Podyjí. Special space is dedicated to light-demanding, threatened and alien plant species, and their response to light improvement. The area of the Podyjí NP has been used by people continuously for a very long time. There is therefore a whole range of plant species, linked to a certain anthropogenic disturbance regime. I observed the development of plant communities using phytocenological relevés on six pairs of clearings (isolated and connected with open habitats), created in 2011 and 2012. At the same time, I also investigated the adjacent closed-canopy forests and open forests on the edge of the canyon. During the first year after cutting, there was a significant increase in diversity and species cover in the clearings. In the following years, significant changes took place on isolated clearings, as the zone of closed-canopy forest delayed low colonization by new individuals in first years. In the clearings, diversity and abundance of plants were significantly higher than in the closed-canopy forest and open forest. The number of endangered plant species was the highest in open forest. Several unique species of endangered plants have been recorded on clearings. These species have not been found in...
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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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