Phosphorus cycle fluxes between

Feedbacks may be affected directly by atmospheric CO2, as in the case of possible CO2 fertilization of terrestrial production, or indirectly through the effects of atmospheric CO2 on climate. Furthermore, feedbacks between the carbon cycle and other anthropogenically altered biogeochemical cycles (e.g., nitrogen, phosphorus, and sulfur) may affect atmospheric CO2. If the creation or alteration of feedbacks have strong effects on the magnitudes of carbon cycle fluxes, then projections, made without consideration of these feedbacks and their potential for changing carbon cycle processes, will produce incorrect estimates of future concentrations of atmospheric CO2. 

Fig. 6.11 The benthic phosphorus cycle in deep-sea sediments, a) generalized processes of particulate transport, release and fixation b) example of fluxes of P (in 10 tmol cm M ) between the pore water and the sediment P reservoirs as calculated with a model for a deep-water location at the western European continental platform Goban Spur (after Slomp et al. 1996).

This article begins with a brief overview of the various components of the global phosphorus cycle. Estimates of the mass of important phosphorus reservoirs, transport rates (fluxes) between reservoirs. 

The continental cycle of phosphorus is determined by ten fluxes (Figure 4.1) closed by a single component Ps indicating the phosphorus supplies on land in soil-vegetation formations and in animals. The supplies of phosphorus in soils are replenished due to fluxes Hf (l = 2,4,5,8,9,10). The loss of phosphorus from the soil is determined by fluxes Hj ( / = 3,6,7,11). As the detailing of surface reservoirs of phosphorus and consideration of more ingenious effects in the interaction between these reservoirs gets more complicated, so the classification of the surface fluxes of... 

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