Sediment oxygen consumption

Estuary Nutrient fluxes ( xmol m 2 h Reference3 PO4 ) Sediment oxygen consumption (SOC) (g m 2 d-1)... 

Miller-Way, T., Boland, GS., Rowe, G.T., and Twilley, R.R. (1994) Sediment oxygen consumption and benthic nutrient fluxes on the Louisiana continental shelf a methodological comparison. Estuaries 17, 809-815. 

In general it appears that the rate of sedimentary dentirificaiton is related to the rate of sediment oxygen consumption (Christensen, 1994 Laursen and Seitzinger, 2002 Seitzinger and Giblin, 1996). 

Figure 18.16 A summary of sediment-water NH4, PO4 and sediment oxygen consumption (SOC) rates, including (A) frequency histogram of rates (B) rates as a function of salinity regime (C) rates as afunctionof system depth (D) rates as afunctionof temperature. Data were organized by Bailey (2005).

Assume sediment oxygen consumption at a rate of 60 mg/(m2 hr) is the major sink for 02 in a small lake 10 m deep. For simplicity, assume that the lake basin is in the shape of a rectangular box. When the lake stratifies in late spring, with a thermocline at 4-m depth, the water contains 10.8 mg/liter of oxygen. Assume the hypolimnion is fairly well mixed. 

Figure 20. Relatiomhip between denitrification rates coupled to sediment nitrification and sediment oxygen consumption rates in various continental shelf regions. Dashed line indicates regression line (Seitzinger and Giblin, 1996).

Water quality changes in reservoirs (primary production, sedimentation, organic matter decomposition, oxygen consumption)... 

Boynton, W.R., and Kemp, W.M. (1985) Nutrient regeneration and oxygen consumption by sediments along an estuarine gradient. Mar. Ecol. Prog. Ser. 23, 45-55. 

Florek, R.J., and Rowe, GT. (1983) Oxygen consumption and dissolved inorganic nutrient production in marine coastal and shelf sediments of the Middle Atlantic Bight. Inti. Rev. Gesmaten. Hydrobiol. 68, 73-112. 

Mackin, J.E., and Swider, K.T. (1989) Organic matter decomposition pathways and oxygen consumption in coastal marine sediments. J. Mar. Res. 47, 681-716. 

Nishio, T., Koike, I., and Hattori, A. (1982) Denitrification, nitrate reduction, and oxygen consumption in coastal and estuarine sediments. Appl. Environ. Microbiol. 43, 648-653. 

Smith, K.L., Jr. (1987) Food energy supply and demand a discrepancy between particulate organic flux and sediment community oxygen consumption in the deep ocean. Limnol. Oceanogr. 32, 21-220. 

Yoon, W. B., and Benner, R. (1992) Denitrification and oxygen consumption in sediments of two south Texas estuaries. Mar. Ecol. Prog. Ser. 90, 157-167. 

RabouiUe, C., and GaiUard, J. F. (1991). A coupled model representing the deep-sea organic carbon mineralization and oxygen consumption in surficial sediments. 96, 2761—2776. 

Wiltshire, K. H., Schroeder, F., Knauth, H. D., and Kausch, H. (1996). Oxygen consumption and production rates and associated fluxes in sediment-water systems A combination of microelectrode, incubation and modelling techniques. Arch. Hydrobiologia 137, 457—486. 

Smith K. L. and Baldwin R. J. (1984) Seasonal fluctuations in deep-sea sediment community oxygen consumption central and eastern North Pacific. Nature 307, 624-626. 

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