Dissolved organic carbon phosphorus

Carpenter, S. R., J. J. Cole, J. F. Kitchell, and M. L. Pace. 1998. Impact of dissolved organic carbon, phosphorus, and grazing on phytoplankton biomass and production in experimental lakes. Limnology and Oceanography 43 73-80. 

Fig. 2.5 Timeseries of daily phytoplankton, zooplankton, dissolved organic carbon, detritus, and phosphorus concentration, and photosyntesis over one model year at two location the shelf seas of the Pacific Ocean, 170 E 65 N and 140 E 10 S.

The simultaneous determination of dissolved organic carbon and phosphorus is feasible [39]. Phosphoglyceric acid (1 g equivalent P) was added to membrane-filtered, pre-irradiated seawater, and the phosphate was measured before and after ultraviolet irradiation using an autoanalyser. The recovery of organic phosphorus was 100%. 

Lake-Water Samples. Ten lake-water samples were collected from September 1990 to May 1991. The total soluble phosphorus concentration for the concentrated samples ranged from 23.8 to 60.8 mg of P/L, and the soluble reactive phosphorus concentrations ranged from 1.0 to 18.1 mg of P/L (Table I). Dissolved organic carbon concentration values for the concentrated samples ranged from 5000 to 20,000 mg of C/L. The signal-to-noise ratios from 12-14-h runs achieved for the NMR spectra range from 3.0 to 7.0. The pH of the concentrated samples after the addition of FeEDTA fell between the values of 7.00 and 8.00. Addition of the FeEDTA increased the pH by only a few tenths of a pH unit. 

Donald, R. G., D. W. Anderson, and J. W. B. Stewart. 1993. Potential role of dissolved organic carbon in phosphorus transport in forested soils. Soil Science Society of America Journal 57 1611-1618. 

Dillon, P. J., and L. A. Molot. 1997b. Effect of landscape form on export of dissolved organic carbon, iron, and phosphorus from forested stream catchments. Water Resources Research 33 2591-2600. 

De Haan, H., and T. de Boer. 1986. Geochemical aspects of aqueous iron, phosphorus and dissolved organic carbon in the humic Lake Tjeukemeer, the Netherlands. Freshwater Biology 16 661—672. 

TABLE 11.3. Dissolved Organic Carbon, Nitrogen, and Phosphorus in Ocean Waters... 

Figure 9.22. Oceanic cycles of organic carbon, nitrogen, and phosphorus. DOC = dissolved organic carbon POC = particulate organic carbon NPP = net primary production DN = dissolved nitrogen PN = particulate nitrogen DP = dissolved phosphorus, PP = particulate phosphorus. C and N fluxes are in units of 1012 moles C and N y1 P fluxes are in units of 1010 moles P y1.

Sharp, J. H. (2002). Analytical methods for dissolved organic carbon, nitrogen, and phosphorus. In Biogeochemistry of Marine Dissolved Organic Matter (HanseU, D. A., and Carlson, C. A., eds.). Academic Press, San Diego, pp. 35—58. 

Hobbie J. E. and Likens G. E. (1973) Output of phosphorus, dissolved organic carbon, and fine particulate carbon from Hubbard Brook watersheds. Limnol. Oceanogr. 18, 734-742. 

The organic material is subjected to a variety of anabolic and catabolic processes, which are controlled by organisms. Metabolites of these processes can be released into the water as both, as POM and as dissolved organic material (DOM). Also in DOM, the amount of inorganic precursors is generally quantified as a sum of dissolved organic carbon, nitrogen or phosphorus (DOC, DON, DOP). As DOM is not subjected to... 

Aminot, A., Kerouel, R., 2004. Dissolved organic carbon, nitrogen, and phosphorus in the N-E Atlantic and the N-W Mediterranean with particular reference to non-refractory fractions and degradation. Deep-Sea Research, 151, 1975-1999. 

Concentrations of dissolved organic material expressed as dissolved organic carbon (DOC), dissolved organic nitrogen (DON) and dissolved organic phosphorus (DOP) in mg m (ppb) for surface microlayer (M) and subsurface water (Sub) samples... 

Heterotrophic bacteria are now seen as potentially important links between dissolved resources and higher trophic levels (Vadstein et ah, 1993). This altered view of the role of bacteria has especially important consequences for conceptualizing the significance of bacteria in phosphorus dynamics at the base of the food web, because heterotrophic bacteria differ from phytoplankton in being relatively phosphorus-rich organisms (Vadstein, 2000). Heterotrophic bacterial metabolism of phosphorus is dependent not only on phosphorus availability but also on the availability of labile dissolved organic carbon in the immediate environment. 

Table 9.2. Two physiological states of natural bacterioplankton assemblages. Cellular phosphorus content and phosphate uptake in environments with low or high concentrations of labile dissolved organic carbon. Values are means (standard error in parentheses). Reproduced from Gao (2002) with permission. ND, not determined.

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