Demographic and spatial structure at the stage of expansion in the populations of some alien land snails in Belgorod city (Central Russian Upland)

Abstract

Field studies of alien terrestrial gastropods Xeropicta derbentina (Gastropoda, Stylommatophora, Hygromiidae), Brephulopsis cylindrica (Gastropoda, Stylommatophora, Enidae) and Harmozica ravergiensis (Gastropoda, Stylommatophora, Hygromiidae) were carried out in the south of the Central Russian Upland in Belgorod (Russia). An analysis of the dynamics of population density, their demographic structure and spatial organization was performed on the basis of data for three years of observations (2017, 2019, 2020).