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Diversity and habitat preferences of carabid beetles (Coleoptera, Carabidae) on wetlands in the Lonjsko polje Nature park (Croatia)

The carabid beetles were studied in wetland habitats of the Lonjsko Polje Nature Park (Croatia). Seven habitats differing in vegetation, ground texture, human influence and impact of flooding waters were selected. Field investigations took place between April 2000 and April 2001 and between April 2002 and November 2002. An increase in number of species was found along the gradient from closed to open habitat mainly due to high anthropogenic impact. For this reason quite a large number of species captured were ubiquists. A different habitat preference was observed in the species of the carabid assemblages. The most carabids collected were associated with open habitats, eurytopic and capable of flight. Extremley rare wetland species, as Blethisa multipunctata, occured in low denisities. The dominant species were Brachinus crepitans (with a high dominance value), Ophonus diffinis, Carabus cancellatus, C. granulatus, Pterostichus melas, P. melanarius, Harpalus progrediens etc. Different diversity indices were applied.

carabid beetles; Lonjsko polje Nature Park; Croatia

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