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National Repository of Grey Literature 2 records found  Search took 0.02 seconds. 
Long-term dynamics of Ledum palustre - testing the distribution model with paleoecological data
 Radoměřský, Tomáš ; Kuneš, Petr (advisor) ; Petřík, Petr (referee)
On the territory of the Czech Switzerland National Park took place during the Holocene significant changes in vegetation cover to the form is most enrolled medium Holocene climatic optimum when broadleaf deciduous forests expanded into Central Europe. These transformations are caused by climatic changes. However, it started the process of soil acidification to this day that caused the other variations of the vegetation composition, even the extinction a variety of species especially in sandstone areas. In addition, in the last few centuries the human impact is graduating, which more or less of the original forests changes due to agricultural and economic reasons to breed-specific and the same-aged plantations which supports the already declining species diversity and relative abundance of the undergrowth species. This work focuses on a single species, evergreen undergrowth shrub Ledum palustre which is characterized by strong demands on its habitat and indicates the specific habitat type. It grows on the upper north-facing edges of rocks with plenty of light and humidity. At these locations stores organic material thanks the favourable hydrology. This makes possible to study the use of pollen and macroremains the paleoecology of the species. On the basis of recent occurrences and the relationships...
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The influence of topography and geology on the functional plant diversity in the Křivoklátsko PLA
 Radoměřský, Tomáš ; Chuman, Tomáš (advisor) ; Romportl, Dušan (referee)
Geological evolution resulted in continual changes of the natural environment. These changes are occuring even today and will take place in the future as well. The present form of nature is the result of conflicting effects of endogenous and exogenous processes. The natural environment is increasingly disturbed and transformed by human activities. The final appearance of the landscape has a decisive influence on the distribution of vegetation. In my work I deal with the influence of topography on the distribution of plant functional types. First I summarize in short the paleogeographic evolution of the Křivoklátsko and the near neighborhood from the time of Upper Proterozoic to the present. Further I describe individual physiogeographic factors and theirs influenceon the distribution and diversity of plants. These include geological substrate, topography, soil, climate and disturbance. Shortly after that I characterize the geology, geomorphology, soils, hydrologyand vegetation of the Křivoklátsko PLA. Later I describe ways of expressing the diversity of plantswith accent on the diversity of functional types. My research is based on the analysis of functional diversity of plants and evaluation of the relationship of individual functional vegetation types and the topography. Results of the work...
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