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Distribution of population sizes within different orchid metapopulations
Švecová, Magdaléna ; Kindlmann, Pavel (advisor) ; Štípková, Zuzana (referee)
Orchids, as one of the most species-rich families in the world, are known for their specific symbiotic relationships with other organisms and can therefore be referred to as indicators of the state of vegetation. Studying orchids as metapopulations allows us to better estimate the level of threat of individual orchid species. The traditional metapopulation model assumes a metapopulation consisting of sub-populations, where individual populations are connected by migration, and colonization of new and recolonization of existing localities occurs. Orchids, on the other hand, show a different behavior. Their seeds are spread passively by wind, and the colonization of new habitats is therefore rather random. Therefore, a new model would be suitable for the study of orchids, which should include information on the size of the population of a given orchid species, taking into account the region in which they occur. The metapopulation is also influenced by the temperature and amount of precipitation before the flowering period, the possibility of individual sterility or dormancy, and last but not least, the quality of management on the site. These variables should be included in a new metapopulation model that could better describe changes in orchid metapopulations. This thesis provides the basis for a...
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