Identification of dissolved organic matter size components in freshwater and marine environments

An assessment of remote sensing algorithms for colored dissolved organic matter in complex freshwater environments

Photochemical and microbial degradation of dissolved lignin phenols: Implications for the fate of terrigenous dissolved organic matter in marine environments

[1] Molecular level characterizations of dissolved lignin were conducted in Mississippi River plume waters to study the impact of various removal mechanisms (photooxidation, microbial degradation, and flocculation) on dissolved organic material (DOM) concentrations and compositions. Prior to analysis, dissolved (<0.2-mm pore size) samples were size fractionated by ultrafiltration into high mole...

Depth-dependent photodegradation of marine dissolved organic matter

1 Department of Civil and Environmental Engineering, University of California, Irvine, Irvine, CA, USA, 2 Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA, USA, 3 Department of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, USA, 4 Bermuda Institute of Ocean Sciences, St. George’s, Bermuda, 5 Ecosystems Center, Marine Biological Laborat...

Experimental Evidence for Abiotic Sulfurization of Marine Dissolved Organic Matter

Dissolved organic sulfur (DOS) is the largest pool of organic sulfur in the oceans, and as such it is an important component of the global sulfur cycle. DOS in the ocean is resistant against microbial degradation and turns over on a millennium time scale. However, sources and mechanisms behind its stability are largely unknown. Here, we hypothesize that in sulfate-reducing sediments sulfur is a...

Microbial Community Structure Affects Marine Dissolved Organic Matter Composition

Marine microbes are critical players in the global carbon cycle, affecting both the reduction of inorganic carbon and the remineralization of reduced organic compounds back to carbon dioxide. Members of microbial consortia all depend on marine dissolved organic matter (DOM) and in turn, affect the molecules present in this heterogeneous pool. Our understanding of DOM produced by marine microbes...