Budget organic matter

Jones, J. B., J. D. Schade, S. G. Fisher, and N. B. Grimm. 1997. Organic matter dynamics in Sycamore Creek, a desert stream in Arizona, USA. In Stream Organic Matter Budgets (J. R. Webster and J. L. Meyer, Eds.), pp. 78-81. Journal of the North American Bentho-logical Society 16 3-161. 

In this chapter, we develop a simple model that predicts the maximum possible heterotrophic organic N formation as a function of the importance of allochthonous carbon inputs. We then review data from the literature on the relative importance of heterotrophic organic N formation in aquatic systems. This material is presented in a landscape context, following a flow path of organic matter from streams to the open ocean. We consider a variety of evidence to look at heterotrophic organic N formation, including enhancement of decomposition by N additions and ecosystem budgets. We rely, however, primarily on data from 15N addition studies to quantify the... 

Webster, J. R., and J. L. Meyer. 1997. Organic matter budgets for streams A synthesis. Journal of the North American Benthological Society 16 141-161. 

Figure 17.3 Si, P, and N budgets for the Amazon shelf. Recycling of P and N in the water column is necessary to sustain the primary production on the shelf. Little Si, P, or N are buried in the seabed. Approximately 40% of the bioavailable dissolved N supplied to the shelf, however, is deposited as organic matter and then converted to ammonium/nitrate and finally to molecular nitrogen, making it unavailable to oceanic plankton.

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