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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Causes of vegetation heterogeneity of oak forests in Podbořansko region
 Procházka, Michal ; Vojta, Jaroslav (advisor) ; Melichar, Vladimír (referee)
Thermophilous oak forests are a habitat characterized by a large diversity of vascular plants. In the case of open canopy woodlands, the diversity of the herb undergrowth is enhanced by the significant heterogeneity of the environment. It can be demonstrated for example at the Dětaň Chlum in neighborhood of the Doupovské hory Mts. However, it has not yet been fully known which natural characteristic have the most significant influence on the formation of such a diverse vegetation. One of the possible causes can be found in historical management. Therefore, this work provides some insight into the history of forest management in the Podbořany region based on archival materials such as Historical Forest Survey, Management Plans or Archive Maps. The obtained information is to a large extent surprising. It has been shown that coniferous stands with a long time of timber extraction have dominated the Dětaň chlum in the past. However, this contradicts the assumption that it is an ancient oak coppice, as suggested by the current appearance of vegetation with a high incidence of polycormones in the local nature reserve. To find out the environmental causes of the current heterogeneity of vegetation, I used the CANOCO statistical program to analyze the dependence of my own phytosociological data on selected...
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The origin of open canopy oak forests in Podborany region
 Procházka, Michal ; Vojta, Jaroslav (advisor) ; Mayerová, Hana (referee)
The open canopy thermophilous oak forests are a phenomenon whose origin has not been completely clarified yet. However, they are a valuable source of a biodiversity caused by diversity of microstands which has an irreplaceable role in a landscape of the central Europe. Due to the appropriate protection it is desirable to understand the factors which caused this phenomenon. This review summarizes the current knowledge regarding the factors that support creation and preservation of open canopy oak forests in central Europe. In addition to abiotic factors such as small depth in the soil horizon, there is a large section primarily dedicated to human influence and now, mainly abandoned farming methods. Such methods include coppicing and wood-pasture. The question of the origin of open canopy oak forest is also discussed in the context of the history of farming in the Podborany region where we can still find a few open canopy oak forests. Powered by TCPDF (www.tcpdf.org)
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