Dissolved organic phosphorus

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. 

Because the application of NMR spectroscopy to environmental samples is relatively new, we focused our studies on the identification and characterization of DOP by 31P FT-NMR spectroscopy. Ultrafiltration and reverse osmosis concentration techniques were employed to increase the dissolved organic phosphorus concentrations to the detection level of 31P FT-NMR techniques (approximately 10-20 mg of P/L). With these concentration methods a DOP concentration factor of up to 2000 is obtainable. This chapter reports the use of 31P FT-NMR spectroscopy in the analysis of DOP. In... 

Figure 15. Seasonal changes in dissolved organic phosphorus detected by 31P FT-NMR spectroscopy. The peak height ratio was 4.0-5.0 ppm 0.0-2.0 ppm.

IV. PHOTOCHEMICAL MODIFICATIONS OF DISSOLVED ORGANIC NITROGEN AND DISSOLVED ORGANIC PHOSPHORUS... 

Vaz, M.D. Ron, Edwards, A.C., Shand, C.A. and Cresser, M. (1992) Determination of dissolved organic phosphorus in soil solutions by an improved automated photo-oxidation procedure. Talanta, 39, 1479-1487. 

Dissolved organic phosphorus a subcomponent of all the phosphorus-containing dissolved organic compounds in dissolved organic matter (e.g., phosphonates). 

Bjorkman, K. M., and Karl, D. M. (2003). Bioavailability of dissolved organic phosphorus in the euphoric zone at Station ALOHA, North Pacific Subtropical Gyre. Limnol. Oceanogr. 48, 1049-1057. 

A discussion of organic pools in general (DON plus DOC and dissolved organic phosphorus) is presented in Sharp (2002). 

Like other dissolved organic nutrients, the chemical composition of organic P is relatively unknown. Marine dissolved organic phosphorus (DOP) composition has been mostly identified as particular compound classes such as monophosphate esters, phosphonucleotides, nucleic acids, phospholipids, phosphonates and polyphosphates (Benitez-Nelson, 2000). Kolowith et al. (2001) found that monophosphate esters and phosphonates are major components in the Pacific Ocean, the Atlantic Ocean and the North Sea. ATP (adenosine triphosphate), ubiquitous in aU living cells, has been used as a model DOP compound in radiotracer experiments to obtain information on P sources and fluxes in natural environments (Bjorkman et al., 2000 Karl and Bossard, 1985) and cyanobacterial cultures (Fu et al., 2006). 

Tamminen, T. (1989). Dissolved organic phosphorus regeneration by bacterioplankton 5 -nucleotid-ase activity and subsequent phosphate uptake in a mesocosm experiment. Mar. Ecol. Prog. Ser. 58, 89-100. 

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