Seasonal impact of planktivory on phosphorus release by Lake Wingra zooplankton

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Abstract
Summary Using statistical models and population estimates we calculate seasonal impact of predation by bluegill sunfish on four abundant zooplankton species. Our results show an order of magnitude reduction in rates of P release from pelagic zooplankton during June and July when predation reaches its seasonal maximum and allochthonous P supplies are seasonally low. Both the quantity of zooplankton consumed and the size-selective feeding behavior of bluegills appear important in determining net effects of predation on P availability in pelagic Lake Wingra.