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Vliv převodu lesního tvaru na společenstva saproxylických brouků (Coleoptera) na Hádecké planince (Drahanská vrchovina) pět let po provedení zásahu
Pellarová, Magdalena
In the framework of the bachelor thesis the intervention on Hádecká planinka was studied. In this research the influence of reduction of the canopy closure and the vertical position of the trap on the studied bioindication group was studied. The beetles were studied by the window trap, which was installed in growth of varying intensity and in the control area where no intervention was made. The relationship of species data and monitored variables was evaluated by canonical correspondence analysis (CCA). Altogether were trapped 1170 individuals and 129 species. The most numerous were the families Salpingidae, Curculionidae and Monotomidae. The most numerous were the species Salpingus planirostris, Rhizophagus bipustulatus and Litargus connexus (all with more than 80 individuals). In total 30 species is classified in red list of threatended species of invertebrates of Czech Republic, most threatened species belong to category „endangered“: Isorphis marmottani, Nalanda fulgidicolis, Mycetophagus ater, Pedostrangalia reversita, Synchyta undata and Synchyta variegata. On the basis of the data evaluation it can be stated, that saproxylic beetles are demonstrably influenced by the canopy closure and the vertical position of the trap. Most species tend to occur in areas with lower canopy closure. However, in the case of testing the impact on the level of the particular species, abundance of 10 species increases with the canopy closure, in contrary only abundance of 5 species decreases with the increasing canopy closure. It was also found that in the case of 7 species the abundance increases with height, and in the case of 8 species the abundance decreases with the height.
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