Dissolved inorganic carbon organic nitrogen

Manny, B.A., and Wetzel, R.G (1973) Diurnal changes in dissolved organic and inorganic carbon and nitrogen in a hard-water stream. Freshwater Biol. 3, 31-43. 

Fig. 2 Longitudinal changes in nutrient concentrations below the effluent input of a WWTP without tertiary treatment in La Tordera Stream. Values are the average ( SEM) of monthly measurements done over a year (see more details in [47]). In the left panel, note the net decline of ammonium concentration with concomitant net increases in nitrate concentration, suggesting a potential hot spot for nitriflcation. However, in the latest meters downstream, dissolved inorganic nitrogen (DIN) tends to decrease, which indicates net lost of DIN possibly due to denitrification. The right panel shows net changes in phosphate and dissolved organic carbon (DOC) concentrations. While phosphate does not exhibit any clear trend on an annual basis, DOC seems to decline similarly to DIN, which supports the relative dominance of denitrification...

Andersson, M. G. I., van Rijswijk, P., and Middelburg, J. J. (2006). Uptake of dissolved inorganic nitrogen, urea and amino acids in the Scheldt estuary Comparison of organic carbon and nitrogen uptake. Aquat. Microb. Ecol. 44, 303—315. 

Finally, the importance of dissolved and particulate organic carbon and organic nitrogen compounds is discussed for the Baltic Sea because the effects of eutrophication cannot be properly understood considering only the concentrations of inorganic nutrients. 

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