... the pond also depends upon ratio surface: volume) . At the onset of the season a ratio “pond surface: pond volume larger then 3:1 seems acceptable (pond surface expressed in m 2 , pond volume ... unprecise and inaccurate. Of course sample volume depends both on animal abundance and animal size. As both cyst production and biomass production mainly depend on the number of large animals, volume ... populations. Phytoplankton and zooplankton populations are therefore intimately linked in a continuous cycle of bloom and decline that has evolved and persisted throughout millions of years of evolution....