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Changes in the Apiformes fauna are discussed on the basis of the fauna of Poland and other European countries, starting from historical times. The presentation of contemporary changes accounts for different trends: (a) population decline or disappearance of some species (shrinking ranges), (b) population increases or expansion of other species. The fauna is described dynamically against the background of environmental change (fluctuation hypothesis). It is postulated that updated comprehensive studies of faunal resources need to be undertaken, concentrating on species diversity and density.
The checklist of 70 species of wild bees from Bydgoszcz (Bromberg, leg. Oskar MEYER, 1914-1916) and Gorzów Wielkopolski (Landsberg W. Umgb, leg. dr G. GÖTZE, 1927) is given. Tetralonia hungarica FRIESE, a very rare southern bee, was found in South-Eastern part of Poland.
The life and work of Prof. Dr. Yu. A. PESENKO (1944-2007) are discussed. He was a renowned Russian hymenopterologist, world-class specialist in bees of the family Halictidae. In 1997-1999 he was also employed as a visiting professor at the Institute of Biology and Environmental Protection, Pedagogical University of Bydgoszcz.
Communities of bees (Apiformes) were studied in the Wolin National Park in 2002-2003. The Park is located on the island of Wolin in northwestern Poland, at the southern coast of the Baltic Sea. In total, 133 bee species were recorded there in various habitats. This study shows that the major role in protection of bee communities is played by xerothermic and sandy grasslands. They are distinguished by the highest species diversity of Apiformes, including Anthophora bimaculata and its nest parasite Ammobates punctatus (rare in mainland Poland). In contrast, coastal grey dunes support mostly bumblebees, including cuckoo bumblebees.
Species diversity and ecology of bees (Apiformes) was studied in the Masurian Landscape Park (NE Poland). The Park is dominated by woodland (50%) and lakes (30%). In total, 153 species were recorded there, which account for 32.6% of the Polish bee fauna. In the study area, the bee fauna is characterized by a lower diversity of Halictidae and a high diversity of Apidae. One of the dominant species is Andrena lapponica, with two generations: in early spring (myrtillus generation) and spring (vitis-idaea generation). This contrasts with earlier reports that this species is univoltine.
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