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Production of Dissolved Organic Matter

At whole lake scales, littoral zones are a major component of autochthonous DOM production and important sources of labile organic matter for aquatic bacteria. Of the approximately one billion lakes in the world, the littoral zone accounts for more than 95% of lake surface area in nearly 99.8% of all lakes (Wetzel, 1983 Fig. 3a). The importance of shallow waters is even more marked when the bounds of lakes are expanded to include wetlands. With such an expanded view, the littoral zone and wetlands comprise more than 95% of the area in 99.999% of all lakes (Fig. 3a). Clearly, shallow waters are a dominant feature of lentic ecosystems. [Pg.15]

As with phytoplankton, macrophytes generate DOM either through extracellular release of photosynthate or following aging and subsequent release of dissolved and particulate constituents to the surrounding water. Information about extracellular release of DOM from macrophytes is scant. Available data indicate that extracellular release varies widely, with esti- [Pg.15]

FIGURE 3 Proportion of lake area accounted for by littoral zones for the world s lakes (a), and the proportion of extracellular (ER) dissolved organic matter inputs derived from littoral zones (b see text for description of the model). The solid lines illustrate relationships in which lake boundaries are restricted to littoral and pelagic zones and the dotted lines illustrate patterns in which lake boundaries are expanded to include adjacent wetlands. In (b), the two sets of lines illustrate the range in the contribution of littoral zones to total lake ER with variation in rates of primary production for phytoplankton (0.1-2.0 kg organic matter m-2 yr 1) and macrophytes (0.6-3.8 kg organic matter nT2 yr 1). The relationship between littoral zone area and number of lakes is from Wetzel (1983). [Pg.16]

This major input of DOM from macrophytes is not restricted to lakes, but is also realized in other aquatic ecosystems. DOM export from watersheds in lotic ecosystems is directly related to annual runoff, but significantly greater in swamp-draining streams compared with upland-draining streams (Mulholland and Kuenzler, 1979 see Chapter 2 and 6). In the Hudson Estuary, planktonic bacterial production is 3 to 6 times greater than primary production (Findlay et al., 1992). DOC derived from submerged aquatic plants in part supports the difference in bacterial carbon uptake and planktonic primary production. [Pg.18]

DOM input, but also regulates the quantity of the plant biomass that is transformed to DOM and the quality of the dissolved material that is released. [Pg.19]


Wangersky PJ (1978) Production of dissolved organic matter. In Marine Ecology (ed. Kinne O), Vol. 4, John Wiley, New York... [Pg.451]

The photosynthetic production of dissolved organic matter (DOM) in marine and freshwater ecosystems is a major source of metabolic substrates... [Pg.3]

Baines, S. B., and M. L. Pace. 1991. The production of dissolved organic matter by phytoplankton and its importance to bacteria Patterns across marine and freshwater systems. Limnology and Oceanography 36 1078-1090. [Pg.20]

Duursma E. K. (1963) The production of dissolved organic matter in the sea, as related to the primary gross production of organic matter. Neth. J. Sea Res. 2, 85—94. [Pg.3026]

Otsuki, A. and Hanya, T., 1972. Production of dissolved organic matter from dead green algae cells. I. Aerobic microbial decomposition. Limnol. Oceanogr., 17 248—257 II. Anaerobic microbial decomposition. Limnol. Oceanogr., 17 258—264. [Pg.173]

Smith, W. O., R. T. Barber, and S. A. Huntsman. 1977. Primary productivity off the coast of northwest Africa Excretion of dissolved organic matter and its heterotrophic uptake. Deep Sea Research 24 35-47. [Pg.23]

II. Source, Production, and Fractions of Dissolved Organic Matter 28... [Pg.25]

II. SOURCE, PRODUCTION, AND FRACTIONS OF DISSOLVED ORGANIC MATTER... [Pg.28]

Nagata, T. 2000. Production mechanisms of dissolved organic matter. In Microbial Ecology of the Oceans (D. L. Kirchman, Ed.), pp. 121—152. Wiley-Liss, New York. [Pg.240]

Rich, J., M. Gosselin, E. Sherr, B. Sherr, and D. L. Kirchman. 1997. High bacterial production, uptake and concentrations of dissolved organic matter in the central Arctic Ocean. Deep-Sea Research II 44 1645—1663. [Pg.240]

Kieber, R. J., A. Li, and P. J. Seaton. 1999. Production of nitrite from the photodegradation of dissolved organic matter in natural waters. Environmental Science and Technology 33 993-998. [Pg.260]

Aitkenhead-Peterson, J. A., McDowell, W. H., and Neff, J. C. (2003). Sources, production, and regulation of allochthonous dissolved organic matter inputs to surface waters. In Aquatic Ecosystems—Interactivity of Dissolved Organic Matter, Findlay, S. E. G., and Sinsabaugh, R. L., eds., Academic Press, Amsterdam, pp. 25-70. [Pg.395]

Kitis, M., Kilduff, J. E., and Karanfil,T. (2001). Isolation of dissolved organic matter (DOM) from surface waters using reverse osmosis and its impact on the reactivity of DOM to formation and speciation of disinfection by-products. Water Res. 35, 2225-2234. [Pg.401]

Wang, W., Zafiriou, O. C., Chan, I., Zepp, R. G., and Blough, N. V. (2007). Production of hydrated electrons from photoionization of dissolved organic matter in natural waters. Environ. Sci. Technol. 41,1601-1607. [Pg.727]

Figure 8.6 Major sources of dissolved organic matter (DOM) to estuaries, primarily composed of riverine inputs, autochthonous production from algal and vascular plant sources, benthic fluxes, groundwater inputs, and exchange with adjacent coastal systems. (Modified from Hansell and Carlson, 2002.)... Figure 8.6 Major sources of dissolved organic matter (DOM) to estuaries, primarily composed of riverine inputs, autochthonous production from algal and vascular plant sources, benthic fluxes, groundwater inputs, and exchange with adjacent coastal systems. (Modified from Hansell and Carlson, 2002.)...
Caraco, N.F., and Cole, J.J. (2003) The importance of organic nitrogen production in aquatic systems a landscape perspective. In Aquatic Ecosystems Interactivity of Dissolved Organic Matter (Findlay, S.E.G, and Sinsabaugh, R.L., eds.), pp. 263-283, Academic Press, New York. [Pg.558]

Moran, M.A., Wicks, R.J., and Hodson, R.E. (1991) Export of dissolved organic matter from a mangrove swamp ecosystem evidence from natural fluorescence, dissolved lignin phenols, and bacterial secondary production. Mar. Ecol. Prog. Ser. 76, 175-184. [Pg.633]


See other pages where Production of Dissolved Organic Matter is mentioned: [Pg.124]    [Pg.3]    [Pg.15]    [Pg.317]    [Pg.34]    [Pg.124]    [Pg.3]    [Pg.15]    [Pg.317]    [Pg.34]    [Pg.29]    [Pg.58]    [Pg.43]    [Pg.19]    [Pg.26]    [Pg.186]    [Pg.330]    [Pg.369]    [Pg.383]    [Pg.462]    [Pg.114]    [Pg.117]    [Pg.135]   


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