Abstract. Non-uniform plankton distribution in the ocean is caused by interior and exterior factors. The exterior factors are the influence of habitat, mainly the ocean currents. Internal factors are the intra and extra species interactions. This study demonstrates the possibility or resonance between oscillations of habitat parameters and internal oscillations of plankton coenosis.  In this case the non-uniform character of plankton distribution is most vividly pronounced.

 

Key words:  aquatic ecosystem, phytoplankton, zooplankton, nutrients, predator, prey, sea-mount, eddy, fluid particle, Poincaré section, chaos.