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Hylaeus moricei luteifrons, found in Kujawy: Inowrocław (UTM - CDI 5) is new to the Polish fauna.
The structure of the social wasp communities was studied in the forest areas of the Karkonosze Mts. transformed by acid rains in 1989 and 1994. A significant increase of species diversity (H') was observed in the season of the even year, which resulted from the increased competing interactions between queen mothers. Whereas the distribution of the species' number decreased together with the altitude proportionally to natural distribution of the species' number recorded in the Tatra Mts. On the other hand, the only significantly increased value in the dynamics of Vespinae density in vegetation zones of the Karkonosze Mts. was recorded for the lower subalpine forest. While observing the progressing successive restoration of forests, one can assume that the recorded structural changes in communities of social wasps represent their transitional state.
The structure of bumblebee communities of vegetal floors in the Karkonosze Mts. was investigated. Based on the qualitative and quantitative analysis of the structure, significance of changes in forest floors of the mountains is expressed.
The structure of social wasp communities of vegetal floors in the Polish Tatra Mts. was investigated. Based on qualitative and quantitative analysis, no significant changes here been found.
The qualitative and quantitative analysis of social wasp communities indicates that the changes in the vegetation floors of the Karkonosze Mts. have not yet affected their structure.
Structural dynamics of bee communities was described in the heath area subject to succession of coniferous forest Peucedano-Pinetum. As pine trees successively overgrew the area, two-threefold decrease in the number of species was observed. Flowering of heather increased the food attractiveness of the heath for species of social bees. Stabilization of the structure of bee communities in the heath was observed as a consequence of placing a portable apiary.
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