Therefore, we could expect to find a relationship between nutrient concentration and precipitation or salinity. However, this does not appear in data presented by Fichez et al. (2010) from their station network (a 16-month long period from October 1997 to January 1999): highest NH4 and NO3 concentrations are observed for both dry and wet periods, i.e. October–January for NH4, and February–June, for NO3.