| Abstract [eng] |
The aim of the dissertation was to investigate the abundance, richness, and diversity of infra-orders Bibionomorpha and Tipulomorpha flies in dead wood of common deciduous trees. During the research, the species diversity of Bibionomorpha and Tipulomorpha flies in the second decay stage of dead wood was studied, and the dominance and occurrence of fly species were assessed. For the first time in Lithuania, 76 Bibionomorpha flies were recorded, of which 47 were collected from wood and 29 from soil. It was found that the composition of fly species in dead wood varies among different tree species. The highest diversity and abundance of flies were found in the dead wood of small-leaved lime. The majority of collected flies belonged to the mycetophagous feeding group and had a wide zoogeographic distribution. Representatives of one species were less abundant when the dead wood was more covered with moss; individuals of another species were more abundant when the surface area of the bark was larger. It was determined that the abundance, richness, and diversity of Bibionomorpha and Tipulomorpha flies increase with higher relative humidity and precipitation. It was found that flies collected from wood are most abundant in July and August. The species diversity of flies collected from wood is not very similar to that of flies developing in the soil. |
