PECULIARITIES OF THE ACRIDID (INSECTA: ORTHOPTERA: ACRIDOIDEA) POPULATIONS IN THE AREAS OF THE ITALIAN LOCUST (CALLIPTAMUS ITALICUS L.) OUTBREAKS IN THE SOUTH-EASTERN PART OF WEST-SIBERIAN PLAIN
The acridid assemblages are compared for four model plots (dry, psammophytic, typical, and meadow steppes) in the south-eastern part of West-Siberian Plain (the so-called Kulunda Steppe) during years with the maximal and minimal abundance of the Italian locust. During the Italian locust outbreaks upsurge in its abundance is resulted in some unification of the acridid assemblages. It means more or less similar assemblages are distributed over enormous areas of the Kulunda Steppe. The acridid assemblages of the dry and meadow steppes mainly consist of the species with more or less synchronous long-term dynamics. On the contrary, the acridid assemblages of the psammophytic and typical steppes include the species with asynchronous dynamics.