LONG-TERM DYNAMICS OF BIOMASS OF <i>HEDISTE DIVERSICOLOR</i> MÜLLER AND <i>ABRA OVATA</i> (PHILIPPI) IN THE NORTH CASPIAN SEA
The analyzis of the study results on biomass dynamics and distribution of the species-invaders, polychaete Hediste diversicolor and mollusc Abra ovata (Philippi), in the Eastern and Western parts of the North Caspian Sea during the sea transgression (1978–2007) is given. The maps of colonizers’ distribution in various according to water level years are shown.