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Relations among soil characters, vegetation, and mollusc communities of montain beech forests
Kopalová, Zuzana ; Juřičková, Lucie (advisor) ; Pech, Pavel (referee)
In three different sites of the Jizerské hory Mountains, we have analysed the effect of soil composition on snail assemblage patterns at small spatial scale. We have chosen such sampling sites so that one site was potentially rich in species, thus, we chose a beech forest enriched with presence of maple (Acer pseudoplatanus), perennial honesty (Lunaria revidida) and white butterbur (Petasites albus), and the second site was bare acidophilous beech forest (Fagetum nudum). In total, there was sampled 22 species of land snails with 919 individuals. None of the soil characteristics has been found to have any statistically significant effect on the snail abundance in sampled sites. For better illustration of species and ecological diversity in the discussed sites, we have used Ellenberg's indicator values for light, humidity, soil reaction, temperature and nutrients. The higher number of species at the enriched sites has been confirmed just for one site out of three. In the Jizerské hory Mountains and surroundings, i.e. at a larger landscape scale, there has been observed an effect of geomorphology, vegetation, human impact and slope orientation on the species diversity. At sites with calcareous background, there has been observed an increase in the species diversity. Sites with rich herbal cover and...
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Diversity of the molluscs of Central Europaean Mountains
Kopalová, Zuzana ; Juřičková, Lucie (advisor) ; Dvořáková, Jana (referee)
This thesis summarizes environmental factors which influence both species richness and abundance of mollusc fauna, and it also describes molluscs' diverzity of the Czech Republic mountain areas. The abundance and species richness of mollusc assemblages are influenced mostly by accessibility of Ca together with correlated pH of soil, humidity, woodland structure together with character of litter, decomposed wood amount, and altitude. Results of number studies on these topics do not correspond to each other. The species diverzity of twelve mountain areas in the Czech Republic were described and 182 species (about 74 % molluscs fauna in the Czech Republic) were recorded. While east-west gradient is apparent for Carpathian species spreading, Alpine species are spreading to the north randomly. Western mountains contain higher proportion of species with wide zoogeographical range.
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