Denní motýli a vřetenušky (Lepidoptera: Hesperioidea, Papilionoidea, Zygaenidae) Choceňsko-vysokomýtské aglomerace (východní Čechy, Česká republika)

Abstrakt: Butterflies and burnets are conspicuous insects often used in ecological studies and as ecological indicators in non-forest habitats. These groups include many species which can provide information about the condition of, and changes to, the environment. I used both groups to study non-forest habitats in a densely populated area in eastern Polabí (Elbian) lowland, with a long history of human land use. I studied the presence and abundance of species within transects in five localities – from wet (hydrophilic) through medium wet (mesophilic) to dry (xeric) grasslands. During the 2008 season I observed 811 individuals of 34 butterfly and burnet species, including several threatened or rare species such as Argynnis adippe (Denis et Schiffermüller, 1775), Boloria euphrosyne (Linnaeus, 1758), Phengaris (syn. Maculinea) teleius (Bergsträsser, 1779) and Phengaris nausithous (Bergsträsser, 1779). Probably the most important species of the study area is Zygaena carniolica (Scopoli, 1773). Argynnis adippe and the two Blues of the genus Phengaris Doherty, 1891 occurred at relatively high population densities and it is probable that they are spreading through the area. In the area studied, wet meadows dominated, but the xeric ones appeared to be more species rich. The xeric sites were more similar to each other in terms of the assemblages of species supported. Xeric habitats supported fewer threatened species, possibly because of more pronounced fragmentation of these habitats in the area studied.

Klíčová slova: Lepidoptera, Hesperioidea, Papilionoidea, Zygaenidae, Zygaena carniolica, eastern Bohemia, Czech Republic, transect, nature conservation