INFLUENCE OF AGROECOSYSTEMS ON BIODIVERSITY OF CARABIDAE IN THE NATURE RESERVE OF ALÚVIUM ŽITAVY IN THE SOUTHWESTERN PART OF THE SLOVAK REPUBLIC PUBLISHED

Jana PORHAJAŠOVÁ, Alena RAKOVSKÁ, Jaroslav NOSKOVIČ, Mária BABOŠOVÁ,
The aim of this study was to evaluate the biodiversity of species of the family Carabidae (Caleoptera), which are an important component of biocenosis and also take the place of bioindicators of environment. Biological/Epigeic material was drawn by the earth traps method, during the three years 2006-2008. Earth traps were exposed during the growing season in four selected sampling sites, on the locality of Nature Reserve Alúvium Žitava, which cover an area of 32.53 ha. Altitude is 111-121 m above sea levels. We obtained total of 9 315 ex of epigeic individuals. These were represented by 27 epigeic groups. Dominant were Collembola, Acarina, Formicoidea and Larvae. Monitored order Coleoptera was represented by 1 096 ex, what representing 11.76% representation of the whole set. Within the Coleoptera families were determined with the dominant representation of two families Staphylinidae (27.55%) and monitored family Carabidae (26.92%). The presence of other families, for example: Cryptophagidae, Dermestidae, Silphidae, Chrysomelidae etc. constitutes less than 5% and subdominant respectively recendent representation was recorded. After analyzing the family Carabidae (295 ex) 33 kinds were determined, including seven dominant species (two eudominant): Poecilus cupreus (L.) 12.54% representation, Pseudoophonus rufipes (De Geer) 10.17%, Carabus granulatus (L.) 9.49%, Pterostichus antracinus (Illig.) 9.49 %, Pterostichus melanarius (Illig.) 7.46%,Carabus violaceus (L.) 6.10%, Platynus dorsalis (Pontopp.) 5.08% representation from the group/family Carabidae. Representation of the other species was at less than 5%, ie subdominant level representation. It was a kind Calathus fuscipes (Goeze), Bembidion lampros (Herbst), Pterostichus niger (Schall.), Stomis pumicatus (Panz.), Amara aenea (De Geer), Calathus melanocephalus (L.), Diachromus granulatus (L.) a Harpalus politus (Dej.), and again from Carabidae. Following other species and lower degree of dominance was eleven species, represented only by 1-2 individuals. In terms of frequency of occurrence of the most frequent species were Pseudoophonus rufipes and Poecilus cupreus, which are characterized by wide ecological valence and with other species belonging to the families with a strong bond to the environment. The two dominant species we can evaluate highly significant dependence on rainfall, temperature and year. Based on the calculated index of diversity, can be stability of Nature reserve, despite the fact that is in farmland, assessed as stable, calculated diversity index 2.8709 is evidenced. From the calculated values it is obvious, that the habitat is functional in terms of self-regulation and has remarkably homeostatic capabilities.
agroecosystem, biodiversity, Carabidae, Nature Reserve, Slovak Republic
Presentation: oral

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