[Distribution of fruit flies (Chloropidae: Meromyza Mg.) in Vologda oblast and east Poland]

Abstract

Species diversity and abundance of fruit flies from the genus Meromyza have been assessed in coastal biotopes, grasslands, and agro-ecosystems of Vologda oblast (Russia) and Warsaw province (Poland). The Jaccard quotient of similarity (IG) of fruit fly abundance has shown a uniformity between coastal banks and grasslands along these banks, as well as between cultivated cereals (except for oats) and field boundaries, cultivated fields, and some reach-in-herbs grasslands, including hayfields. Considerable heterogeneity of species composition of the flies has been revealed in similar biotopes. The biotopes studied have been found to be dominated by one species of fruit flies. It has been discovered that cereal rotation in agro-ecosystem results in change in the dominant species of fruit fly. The cereal height has been foundto influence the abundance and diversity of fruit flies. No regularities have been observed in the correlation between the abundances of fruit flies in different biotopes. It has been pointed out that M. nigriseta Fed. and M. veriegata Mg. can feed on cultivated cereals.