Porovnání malakofauny vápencových lomů v okolí Brna na základě rozdílných rekultivačních opatření

Abstract

This work deals with the study of mollusc communities in limestone quarries. Its task was to characterize areas with different types of used reclamation techniques, to evaluate the composition of species of mollusc communities and to analyze an environmental factors affecting the presence of snails in the studied areas. The main goal of the study was to compare a species variability of snail communities, depending upon the reclamation techniques. Research was accomplished in four closed limestone quarries near Brno. A malacological samples were taken at thirty-six studied areas where there were also recorded selected environmental parameters (coverage of vegetation, the presence of stone rubble and fallen timber, slope of surface, exposure to the cardinal points and vegetation type of immediate surroundings of sampling area) and the type of used reclamation techniques (spontaneous succession, controlled succession, technical reclamation). Work proved the influence of used reclamation techniques on the species composition of snail communities. There have been observed eight ecological groups of terrestrial and aquatic snails from a twenty-five species found in total, which suggest a variety of habitat conditions inside the quarries. It turned out that different reclamation techniques create a different environments, which are possible to characterize by an area of grown trees with the presence of dead wood mass (technical reclamation) on the one hand, and disjointed lawn with short haulm with the presence of stone rubble on the other side (spontaneous succession).