Phytoplankton and environmental variables were studied during a year in a shallow eutrophic lake and its inflow in the ‘depressed Pampa’ of Argentina. The taxa were classified according to the competitors, stress tolerators, ruderals and intermediate categories (CSR) model and were allocated to morpho‐functional groups (MFG). As was expected according to the trophic state, scarce transparency and mixing condition, the R‐strate...