Nitrogen cycle marine

Table 24.9 Recent Estimates of Rates in the Marine Nitrogen Cycle (TgN/y).

Capone, D.G. (2000) The marine nitrogen cycle. In Marine Microbial Ecology. (Kirchman, D., ed.), pp. 455 193, John Wiley, New York. 

CHAPTER 1 The Marine Nitrogen Cycle Overview and Challenges Nicolas Gruber ... 

The marine Nitrogen-cycle, Carbon-cycle, and climate 40... 

The marine nitrogen cycle is perhaps the most complex and therefore the most ... 

In both proposed feedback mechanisms, the dominant controUing factor is the surface ocean NO3 to PO ratio (see Fig. 1.16). Both feedbacks are expected to operate in situations of excess NO3 (i.e., high NOj to PO ratio, shown at the bottom of the feedback loop in Fig. 1.16), as well as in situations ofNO deficiency (i.e., low NO to PO ratio, shown at the top of the feedback loop), if this view is correct, these two feedbacks would provide a rather tight control of the marine nitrogen cycle, creating a well balanced homeostasis. A further consequence is that... 

Figure l.l6 Schematic representation of feedbacks within the marine nitrogen cycle. The inner light grey ellipse shows the two nitrogen cycle internal feedback loops that tend to be stabilizing. These two feedback are proposed to be mainly controlled by the NO to (N P) ratio in sur-... 

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