Abstract: ne of the most crucial events in the life cycle of herbivorous insects is the selection of a suitable site for oviposition.Chemical stimuli play an important role in mediating the behavioral steps leading to oviposition.Abiotic and biotic environmental factors often influence the production or release of behavior-modifying chemicals by plants,and therefore,affect the oviposition prefer-ences of insects.This review intreduces the recent research progress in this area,with special em-phasis on analytical methods and application of electrophysiological techniques.

Key words: phytoplankton, dominant species, niche breadth, niche overlap, Dianshan Lake.