The effects of nutrient run-off on fish productivity - considering the effects of stoichiometry

Soudijn, F.H.; Wolfshaar, K.E. van


Here we give an overview of known effects of stoichiometry on fish, zooplankton and phytoplankton. We consider Lake IJssel a case study for potential effects of (changes in) nutrient runoff on fish productivity. We identify potential effects, list the information that is available for all relevant trophic levels and processes and identify knowledge gaps. Finally, we hypothesize how the observed changes in stoichiometry may have affected the fish productivity and which knowledge is required to investigated these effects thoroughly. In the discussion we consider the broader perspective of the Lake IJssel food web and possible implications of changes in nutrient loading.