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Trencianska skalka czechoslovakia a refuge of thermophilic stinging hymenoptera aculeata


, : Trencianska skalka czechoslovakia a refuge of thermophilic stinging hymenoptera aculeata. Zbornik Slovenskeho Narodneho Muzea Prirodne Vedy 33: 41-94

From 1971 through 1983 the author observed the qualitative composition of the stinging Hymenoptera, so as the relation of their individual species to the cultivated and wild growing plants. The purpose of the study was to obtain the bionomical and ecological data on different species inhabitated five chosen biotopes of the agglomeration Trencianska Skalka surrounding the town of Trencin, special attention was given to the rare and scarce species. The results obtained during the study can be summarized as follows: 1) Altogether there were 410 species of the stinging Hymenoptera belonging to 10 superfamilies, 22 families and 111 genera ascertained on the territory under consideration. The superfamily Apoidea was the most numerous one, it was represented by 7 families, 35 genera, and 213 species. The next in this respect was the superfamily Sphecoidea with one family, 22 genera, and 77 species; then follow the families Pompiloidea (two families, 13 genera, 33 species) and Vespoidea (two families, 14 genera, and 33 species). The greatest number of species belongs to the following families: Sphecidae.sbd.77 species (18.79%), Andrenidae.sbd.67 species (16.34%), Anthophoridae.sbd.50 species (12.19%), Megachilidae.sbd.43 species (10.49%), etc. 2) In the local fauna the Palaearctic zoogeographic component (132 species.sbd.32.30%) prevails, the other ones follow: the Mediterranean component.sbd.86 species (20.98%), the Europeo-Siberian [USSR] component.sbd.79 species (19.27%), the Central-European component.sbd.42 species (10.24%), and the Pontic-Mediterranean component.sbd.33 species (8.05%). 3) The greatest number of species was ascertained on biotope 2 (wood-steppes and borders of the gardens).sbd.246 species (31.95%), then follows biotope 1 (clay pits, loess walls with wood-steppe).sbd.223 species (28.96%) and the next is biotope 5 (alluvial plain of the Vah River.sbd.sandy soils).sbd.157 species (20.39%). Recently an apparent anthropogenetic intervention has been observed on the territory studied. Such intervention may result in the considerable structural changes in the communities of the order Hymenoptera. The territory will be henceforward followed, and after 5-10 years a repeated comparative research will be realized there. Despite the serious technical interferences important for the economical development, this area deserves our attention and a special protection. It is, mainly due to the presence of xerothermic biotopes that are refugia of the thermophilic animal communities, of great scientific value.

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