Dissolved inorganic nitrogen, DIN

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...

The observed slow increase in 15N content of POM at the start of the experiment was probably caused by isotopic dilution from unlabeled dissolved inorganic nitrogen (DIN) brought into the lake from the catchment or input from the hypolimnion via cross-thermocline mixing. Horizontal mixing in the epilimnion is rapid in this small lake samples of moss and periphyton from next to the 15N drippers and on the opposite shores of the lake were equally labeled. 

Figure 5.5 Nitrous oxide emission rates (mmol m-2 d-1) versus dissolved inorganic nitrogen (DIN) loading (N m-2 d-1) in mesocosm experiments at the Marine Ecosystem Research Laboratory. (Modified from Seitzinger and Nixon, 1985.)...

Figure 10.2 Latitudinal export (Tg N y ) of dissolved inorganic nitrogen (DIN) in Northern and Southern Hemispheres. (Modified from Seitzinger et al., 2002a.)...

Dissolved inorganic nitrogen (DIN) 16.8 pmol L l DeMaster and Pope, 1996... 

A second pathway is by the uptake up dissolved inorganic nitrogen (DIN) by the symbiont. The inorganic nitrogen may itself derive from recycling of animal wastes which are then retained by the symbionts in exchange for photosynthate released back to the host (Muscatine et al., 1989 Piniak and Lipschultz, 2004 Wang and... 

Figure 33.12 A schematic box diagram of the Hood et al. (2001,2004) ecosystem model. The state variables are dissolved inorganic nitrogen (DIN), dissolved organic nitrogen (DON), phytoplankton (P), Trichodesmium (T), heterotrophs (H), and detritus (D). Redrawn and modified with permission from Hood et al. (2004).

Most of the primary production in the ocean is supported by dissolved inorganic nitrogen (DIN)... 

In this budget, both estimates for dissolved inorganic nitrogen (DIN) and silicon fluxes are included. The silicon budget is included as a control. The processes involved in the silicon cycle are fewer than that of nitrogen, and so it might be expected that the budget can be closed more easily. The silicon cycle comprises essentially only river and ocean inputs, removal of dissolved silicon... 

Fig. 3.20. The transparency (Tr)-salinity (5) (a), dissolved inorganic nitrogen (DIN)-/ (b), phosphate (P)-/ (c), carbon fixed production (CFP)-Tr (d), CFP-DIN (e), and CFP-P (f) diagrams in the inshore region (YS Surface Water and YS Costal Water) for the SYS in various years (Zheng et al., 2006)...

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