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Different management effects of on microclimate and biodiversity of epigeic and hemiedafic beetles in a monitoring watersheds (area) in Šumava.
CHOCOVÁ, Hana
SUMMARY Communities of epigeic beetles were studied on two water catchments with the different management in the submontaneous area of Bohemian Forest (South Bohemia, Czechia). The Mlýnský stream catchment was characteristic by high representation of unforested habitats (pastures and mowed meadows), Horský stream by higher proportion of forested habitats and non equal management (plots without management, mowed meadows). The microclimatic characteristics (average temperature, average humidity, average wind speed, average radiation) were measured. The method of pitfall trapping was used for beetle sampling. Beetles species were divided into two groups after its preferences to humidity: hygrophilous species and mesophilous species. The degree of human impact was studied by finding of frequency of species of different ecological groups. 57 species was found in the Mlýnský stream and 33 in the Horský stream. The activity of beetles was about five times higher in Mlýnský stream (511 individuals captured) than in the Horský stream (114 indivuduals found). Ubiquitous species prevail in Mlýnský stream and adaptive species in the Horský stream. Stenotopic species were found in the Mlýnský stream only. These results indicate less human impact in Horský stream than in the Mlýnský stream. Frequency of beetle species with the different requirement on the humidity in communites on studied plots indicates the dominance of mesophilous species in Mlýnský stream in comparison with Horský stream. Frequency of hygrophilous species was about three times higher in Horský stream than in Mlýnský stream. The intensity of management affected the beetle structure mainly on the less forested plot of Mlýnský stream. The structure of communites on plots with more intensive management differs from communities on plots with low management. Hygrophilous species prevail on plots with low management of the Mlýnský stream. The effect of management intensity is not documented in Horský stream with the greater proportion of trees.
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