Abstract
Orthopterans are important functional elements of ecosystems, in which several factors influence their distribution and density. Factors related to the vegetation, macro- and microclimate have been intensively investigated, although the role of the bedrock and soil in organization of orthopteran assemblages has not been explored sufficiently. Our results showed that general effects, as (1) dry, warm macro- and microclimate, (2) short vegetation, (3) presence of about 30% bare sand surface, are important habitat factors organizing sandy orthopteran assemblages of the Carpathian Basin too. Further we found that optimal climate and vegetation structure is not sufficient for a high species number of sand-specialists. Local assemblages rich in sand elements are related to sand areas characterised by a proportion of the fine fraction of the soil (= small-fine-dust fractions together) of around 80%.
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