CT41A:
The Biogeochemistry of Dissolved Organic Matter I


Session ID#: 37196

Session Description:
Dissolved organic matter (DOM) plays a major role for biogeochemical cycles in the ocean and on land. DOM contains as much carbon as all living biomass on the continents and oceans combined. The accumulation of DOM in the ocean over several millennia is enigmatic and contradicts established paradigms in geochemistry for organic matter stabilization. On the other hand, bacteria can only assimilate dissolved molecules, and DOM is therefore the main mediator for the flux of energy in marine and freshwater ecosystems. The DOM pool is now recognized as paralleling the sedimentary record as an information-rich set of tracers. These molecules carry the signatures of their source and subsequent journey through the environment. For this session, we invite contributions from all areas of research on DOM biogeochemistry. Since inland waters are important contributors of DOM to coastal margins, we also welcome research which focuses on DOM biogeochemistry across the freshwater-to-marine continuum. Molecular-level and interdisciplinary studies are particularly welcome. Also contributions that apply innovative analytical approaches, or identify novel concepts, fundamental challenges and the future directions of this fast growing field of research are encouraged.
Primary Chair:  Thorsten Dittmar, Carl von Ossietzky University Oldenburg, Institute for Chemistry and Biology of the Marine Environment (ICBM), Oldenburg, Germany
Co-chairs:  Rudolf Jaffe, Florida International University, Southeast Environmental Research Center, Miami, FL, United States, Sasha Wagner, Skidaway Institute of Oceanography, Savannah, GA, United States and Aron Stubbins, Skidaway Institute of Oceanography, University of Georgia, Savannah, GA, United States
Moderators:  Thorsten Dittmar, Carl von Ossietzky University Oldenburg, Institute for Chemistry and Biology of the Marine Environment (ICBM), Oldenburg, Germany, Aron Stubbins, Northeastern University, Marine and Environmental Science; Chemistry and Chemical Biology; Civil and Environmental Engineering, Boston, MA, United States, Sasha Wagner, Skidaway Institute of Oceanography, Savannah, GA, United States and Rudolf Jaffe, Florida International University, Southeast Environmental Research Center and Dept. of Chemistry and Biochemistry, Miami, FL, United States
Student Paper Review Liaison:  Sasha Wagner, Skidaway Institute of Oceanography, Savannah, GA, United States
Index Terms:

4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4806 Carbon cycling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4840 Microbiology and microbial ecology [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4850 Marine organic chemistry [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Cross-Topics:
  • BN - Biogeochemistry and Nutrients
  • MM - Microbiology and Molecular Ecology

Abstracts Submitted to this Session:

CONTROLS OF LAND USE ON THE SPATIAL DISTRIBUTION OF DISSOLVED BLACK CARBON IN A FLUVIAL SYSTEM (310810)
Rudolf Jaffe, Florida International University, Southeast Environmental Research Center, Miami, FL, United States, Jesse Alan Roebuck Jr, Florida International University, Chemistry and Biochemistry, Miami, FL, United States, Michael Seidel, Research Group for Marine Geochemistry, Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl von Ossietzky University Oldenburg, Oldenburg, Germany and Thorsten Dittmar, Carl von Ossietzky University Oldenburg, Institute for Chemistry and Biology of the Marine Environment (ICBM), Oldenburg, Germany
High-resolution analyses of solid-phase extracted DOC elutions from seawater: implications for isotopic heterogeneity of SPE-DOC and future black carbon analyses (314878)
Christian Blair Lewis, Brett D Walker and Ellen R M Druffel, University of California Irvine, Earth System Science, Irvine, CA, United States
Using a Unique Thermal Slice Pyrolysis Gas Chromatography/Mass Spectrometry (Py-GC/MS) Technique to Reveal Chemical Structures of DOM From Nine North American Rivers (327083)
John O'Connor, Newcastle upon Tyne, United Kingdom; University of Texas at Austin, Marine Science Institute, Port Aransas, TX, United States, Laodong Guo, Univ of Wisconsin-Milwaukee, Milwaukee, WI, United States and Zhanfei Liu, The University of Texas at Austin, Marine Science Institute, Port Aransas, TX, United States
Investigation of Photo-exposure on Optical Properties of Dissolved Organic Matter (DOM) Size Fractions (323861)
Kaelin Cawley, National Ecological Observatory Network, Boulder, CO, United States and Rudolf Jaffe, Florida International University, Southeast Environmental Research Center and Dept. of Chemistry and Biochemistry, Miami, FL, United States
DOM transformations in the San Francisco Bay Estuary across a salinity gradient (326703)
Peter J Hernes1, Chia-ying Chuang1, Jennifer Harfmann1, François Guillemette2 and Karl Kaiser3, (1)University of California Davis, Davis, CA, United States, (2)Laramie, WY, United States, (3)Texas A & M University at Galveston, Marine Sciences, Galveston, TX, United States
High Spatial and Temporal Resolution Optical and Molecular Characterization of Dissolved Organic Matter in Reservoirs in the Hells Canyon Complex (Snake River, Idaho): Insights on Mercury Biogeochemistry (322640)
Brett A Poulin1, David C Podgorski2, Ronald Antweiler3, Mark C Marvin-DiPasquale4, Jesse Naymik5, Ralph Myers5, Michael T. Tate6, John DeWild6, Austin Baldwin7, George Aiken3 and David P Krabbenhoft6, (1)U.S. Geological Survey, Boulder, CO, United States, (2)University of New Orleans, Department of Chemistry, New Orleans, LA, United States, (3)USGS, Boulder, CO, United States, (4)U.S. Geological Survey, Menlo Park, CA, United States, (5)Idaho Power Company, Boise, ID, United States, (6)USGS Wisconsin Water Science Center, Middleton, WI, United States, (7)USGS Idaho Water Science Center, Boise, ID, United States
Iron-binding Humic Substances Along the GEOVIDE Transect in the North Atlantic (GEOTRACES, GA01, 2014) (311788)
Hannah Whitby1, Hélène Planquette1, Marie Cheize1,2, Jan-Lukas Menzel Barraqueta3, Rachel U. Shelley1,4, Julia Boutorh1, Leonardo Pereira Contreira5, Manon Tonnard1,6, Aridane G. González1, Eva Bucciarelli1 and Geraldine Sarthou1, (1)IUEM Institut Universitaire Européen de la Mer, LEMAR, Plouzané, France, (2)Laboratoire Cycles Géochimiques et ressources, IFREMER, Plouzané, France, (3)GEOMAR Helmholtz Centre for Ocean Research Kiel, Chemical Oceanography, Kiel, Germany, (4)Florida State University, Department of Earth, Ocean, and Atmospheric Science, Tallahassee, FL, United States, (5)Universidade Federal do Rio Grande, Rio Grande, Brazil, (6)University of Tasmania, Hobart, Australia

See more of: Chemical Tracers, Organic Matter and Trace Elements