... Goals and Tasks . ... The head of Laboratory . ... In the field of historical ecology the main attention was paid to description of dynamics of ecosystems of the North hemisphere in Holocene. ... For example, in the littoral zone of the Bering Sea the dynamics of ecosystems was determined by the changing of abiotic factors - summer temperatures, precipitation amounts in warm and cold seasons, sea temperature, prevailing winds, sea water level, relief of the sea floor, dynamics of coastal zone etc. ...