Binding of monomeric organic compounds to marcomolecular dissolved organic matter in seawater |
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| Authors: | David J Carlson Lawrence M Mayer Mary Louise Brann Timothy H Mague |
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| Institution: | College of Oceanography, Oregon State University, Corvallis, OR 97331 U.S.A.;Program in Oceanography, University of Maine at Orono, Walpole, ME 04573 U.S.A.;Bigelow Laboratory for Ocean Sciences, West Boothbay Harbor, ME 04575 U.S.A. |
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| Abstract: | Several monomeric organic compounds, including amino acids, sugars, and fatty acids, were found to bind abiologically to dissolved macromolecular materials in particle-free seawater at natural substrate concentrations. The binding primarily occurred in ocean surface waters, at rates slower than in situ biological utilization rates of most of the compounds. Seasonal patterns of binding in Gulf of Maine waters may have been related to seasonal variations in macroalgal exudation of polyphenolic materials. Enhanced reactivity of relatively hydrophobic monomers implicated hydrophobic effects as potentially important in marine organic condensations. The resultant condensates showed high particle reactivity, consistent with low concentrations of dissolved condensed materials in seawater. |
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