Using in situ mesocosm experiments, we compared grazing rates, food-selection patterns and nutrient mineralization rates of a daphniid cladoceran and a diaptomid copepod to determine their infl uence on phytoplankton composition and the prevalence of N-fi xing cyanobacteria. We show that grazing and nutrient mineralization may act synergistically within a grazer taxon. Cladocerans exhibited non...

General comments: The authors test the impact of nutrient supply and nutrient stoichiometry on production, partitioning and elemental composition of phytoplanktonderived dissolved (DOC, DON, DOP) and particulate (POC, PON, POP) organic matter in shipboard mesocosm incubations conducted at three nutrient enrichment concentrations. They present clear observations of a decline in organic matter pr...