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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Current state of vegetation in the Sázava River floodplain after spring flood in 2006
 Klášterková, Hana ; Chuman, Tomáš (advisor) ; Matějček, Tomáš (referee)
In this diploma thesis current state of vegetation cover was analyzed after spring flood in 2006 on the lower section of the Sázava river. Immediately after the flood there were 38 sites with alluvial deposits identified in the floodplain. The differences in species composition and species diversity between sites with alluvial deposits and sites without deposits were analyzed. The data were collected by using phytosociological relevés in pairs i.e. - plot with an alluvial deposit and plot without. There were 86 vascular plant species recorded out of which 10 species were non-native but not invasive species and 7 species were non-native invasive species. Results of this thesis revealed that species composition and diversity of invasive species differ between plots with alluvial deposits and plots without alluvial deposits. Moreover, plots without alluvial deposits host more invasive species. Keywords: vegetation succession, river floodplain, extreme floods, species diversity, plant invasion
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Climatic settings of Carpathians' treelines
 Klášterková, Hana ; Treml, Václav (advisor) ; Chuman, Tomáš (referee)
6 Climatic settings of Carpathians' treelines Abstract Alpine treeline ecotone is phenomenon widely studied around the world. Its shift to greater altitudes is connected mainly with climatic changes recently. However, many authors take into account changes in landuse as well. The aim of this thesis was to depict dynamics of treeline and factors influencing temperature metrics which delimitate advancing of the treeline to higher altitudes. For 6 sites within Carpathians were found the uppermost positions of treeline and several temperature metrics based on available meteorological data were calculated for these locations. Results of calculated thermal metrics revealed that treeline positions in most of the studied areas are situated at altitudes under their climatic limit. Varful Omu with TJUN-SEP = 7,1 řC was the only one location which meets the stated interval of minimal mean temperatures for growing season (Paulsen & Körner 2004) necessary for tree growth. This fact points out that treelines found within Carpathian Mts. are under pressure of other limiting factors than thermal ones. Persistent anthropogenic activities have a significant influence on treeline positions in some regions of Carpathian Mts. Altitudes of treeline stands are most negatively influenced by human activites in the Western and...
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