Phosphorus pools

Karl, D. M. and Yanagi, K. (1997). Partial characterization of the dissolved organic phosphorus pool in the oligotrophic North Pacific Ocean. Limnol. Oceanogr. 42,1398-1405. 

Intracellular Phosphorus Pools in Algae 31P NMR and Transmission Electron Microscopy (TEM) Studies... 

Vidal, M., Duarte, C., Granata, T., and Agusti, S. (1999). Dissolved organic nitrogen and phosphorus pools and fluxes in the central Adantic ocean. Limnol. Oceanogr. 44, 106—115. 

Miller A. J., Schuur E. A. G., and Chadwick O. A. (2001) Redox control of phosphorus pools in Hawaiian montane forest soils. Geoderma 102, 219-237. 

The microbial regulation of the P cycle in Forest ecosystems is tightly coupled to soil development and the change of phosphorus pools from the predominance of primary... 

These ectoenzymes play a significant part in phosphorus cycling in natural waters. In lakes and oceans, phosphorus is partitioned among particulate and dissolved inorganic and organic fractions and is rapidly transformed from one fraction to another. Estimates of the size of the labile dissolved organic phosphorus pool in waters off the coast of Hawaii (0.01-0.2 /rg at P L 1), and its rapid turnover (0.008-0.04 h 1), presumably facilitated by extracellular phosphatases, are comparable with those of PO4- (Smith et al., 1985) and indicate the importance of ectoenzymes in the major nutrient cycles. 

This picture of a substantial phosphorus constraint is drastically altered when the presence of the inorganic labile (i.e., sorbed) phosphorus pool is taken into account (Scenario C). Desorption of phosphate occurs in response to increased rates of removal from the soil solution. Consequently, the reduction in soil solution phosphorus concentration over 1730 levels is only 9% for 1981-1990. This contrasts with the 25% reduction in Scenario B. Consequently, the enhancements of Gp and Np are more similar to the no-P-constraint case, though a full expression of the COi-in-duced growth response is still not possible. Accordingly, the rate of net carbon accumulation by the ecosystem is 6.5 mol m - year", substantially more than Scenario B, but about 20% less than what is modeled to be the case if no phosphorus limitations to plant production occurred. 

Labeling the dissolved oceanic silicon pool atmospheric circulation Labeling the dissolved oceanic phosphorus pool tropospheric circulation... 

Phosphorus pool Coasted Open Ocean References... 

Guggenberger, G., Christensen, B.T. and Rubsek, G.H. (2000). Isolation and characterization of labile organic phosphorus pools in soils from the Askov long-term field experiments. Zeitschrift fur Pfianzenernahrung und Bodenkunde 153, 151 -155. 

Turrion, M.-B., Glaser, B., Solomon, D., Ni, A. and Zech, W. (2000) Effects of deforestation on phosphorus pools in mountain soils of the Alay Range, Khyrgyzia. Biology and Fertility of Soils 31, 134-142. 

The microbial phosphorus pool is in close contact with the soil solution (Fig. 7.1). 

Fig. 7.1. Microbial turnover of phosphorus in soils processes (italic) and related pools (rectangle). The dark arrows on the microbial phosphorus pool in the figure indicate phosphorus recycling between different generations or groups of microbes. The symbol denotes extracellular processes in the periplasm mediated by phosphatase exoenzymes or inorganic phosphorus (P.) solubilizing agents organic phosphorus).

This chapter reviews information on the composition of the microbial phosphorus pool and current approaches used to quantify the amount of phosphorus held in the soil microbial biomass. We compare data on microbial phosphorus concentrations in soils under different land-use systems and agricultural practices, and discuss... 

Determination of the microbial phosphorus pool in soil requires suitable correc-... 

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