Dissolved organic matter sources

Continuum of metabolic strategies. AnAnP, anaerobic anoxygenic photosynthesis OP, oxygenic photosynthesis AAnP, aerobic anoxygenic photosynthesis RP/PC, rhodopsin and other pigments HT, heterotroph DOM, dissolved organic matter. Source-. From Filer, A. (2006). Applied Environmental MIoroblology, 42(12), 7431-7437. 

VanGenderen, E.J., Ryan, A.C., Tomasso, J.R. and Klaine, S.J. (2003) Influence of dissolved organic matter source on silver toxicity to Pimephales promelas, Environmental Toxicology and Chemistry 22 (11), 2746-2751. 

De Schamphelaere K., Vasconcelos F., Tack F., Allen H.E., Janssen C. (2004) Effect of dissolved organic matter source on acute copper toxicity to Daphnia magna. Environmental Toxicology and Chemistry 23(5) 1248-1255. 

Ryan, A.C., J.R. Tomasso, and S.J. Klaine. 2009. Influence of pH, hardness, dissolved organic carbon concentration, and dissolved organic matter source on the acute toxicity of copper to Daphnia magna in soft waters Implications for the biotic ligand model. Environ. 

The biogeochemical cycling of POM in the oceans. All of the trophic levels contribute to the POM pool. For the sake of clarity, only the macrozooplankton source is connected to this pool via an arrow. Also shown are the pools of (1) dissolved organic matter (DOM),... 

Source From Karl, D. M., and K. M. Bjorkman (2002). Biogeochemistry of Marine Dissolved Organic Matter, Academic Press, pp. 249-349. 

Salonen, K. Kairesalo, T. Jones, R. I., Eds. Hydrobiologia (Dissolved Organic Matter in Lacustrine Ecosystems Energy Source and System Regulator) 1992, 229, 1-291. 

Recent investigations provide new insight on the structural chemistry of dissolved organic matter (DOM) in freshwater environments and the role of these structures in contaminant binding. Molecular models of DOM derived from allochthonous and autochthonous sources show that short-chain, branched, and alicyclic structures are terminated by carboxyl or methyl groups in DOM from both sources. Allochthonous DOM, however, had aromatic structures indicative of tannin and lignin residues, whereas the autochthonous DOM was characterized by aliphatic alicyclic structures indicative of lipid hydrocarbons as the source. DOM isolated from different morphoclimatic regions had minor structural differences. 

E.R. Baylor and W.H. Sutcliffe, Dissolved organic matter in seawater as a source of particulate food, Limnol. Oceanogr. 8 (1963) 369-371. 

In addition, field studies show considerable variations in the partition coefficients for several organic chemicals to dissolved organic matter from different sources, although the concentration of dissolved organic matter in the different waters was similar (Evans, 1988 ... 

Supply of Dissolved Organic Matter to Aquatic Ecosystems Autochthonous Sources... 

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

Sources, Production, and Regulation of Allochthonous Dissolved Organic Matter Inputs to Surface Waters... 

II. Source, Production, and Fractions of Dissolved Organic Matter 28... 

II. SOURCE, PRODUCTION, AND FRACTIONS OF DISSOLVED ORGANIC MATTER... 

Synthesis of concentrations and fluxes of DOC and DON in precipitation, throughfall, and soil organic and mineral horizons are often reported in the published literature (Willey et al., 2000 Michalzik et al., 2001 Neff and Asner, 2001 Neff et al., 2002). Dissolved organic matter from these sources contributes DOM to groundwater and surface water. Leaf litter leachate is documented as a major source of DOC in the soil water of forested watersheds (Hongve, 1999) and in surface waters (Wetzel and Manny, 1972 McDowell and Fisher, 1976). However, specific quantitative allocation of DOC and DON from roots, leaf litter, and the forest floor in soil solution remains uncertain. 

FIGURE 2 Dissolved organic matter (a) concentration (mgL-1) and (b) flux (kgha 1yr 1) in wet precipitation over continental landmasses. Source of data Mean values and standard deviations from data in Table I. 

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