CT51A:
The Biogeochemistry of Dissolved Organic Matter III


Session ID#: 37190

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:  Aron Stubbins, Northeastern University, Marine and Environmental Science; Chemistry and Chemical Biology; Civil and Environmental Engineering, Boston, MA, United States, Thorsten Dittmar, University of Oldenburg, ICBM-MPI Bridging Group for Marine Geochemistry, Institute for Chemistry and Biology of the Marine Environment, Oldenburg, Germany, 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:

Temporal Dynamics of Dissolved Metabolites in the Oligotrophic Atlantic Ocean (325732)
Elizabeth B Kujawinski1, Craig A Carlson2, Melissa C. Kido Soule1, Krista Longnecker3 and Rachel Jane Parsons4, (1)Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, MA, United States, (2)University of California Santa Barbara, Marine Science Institute/Department of Ecology, Evolution and Marine Biology, Santa Barbara, CA, United States, (3)Woods Hole Oceanographic Inst, Woods Hole, MA, United States, (4)Bermuda Institute for Ocean Sciences, BIOS, St. George's, Bermuda
Amino acid compound specific δ13C fingerprinting of old vs. young dissolved organic matter: testing new ideas about a microbial nitrogen pump in the North Pacific subtropical gyre (326438)
Hope L Ianiri, University of California Santa Cruz, Ocean Sciences, Santa Cruz, CA, United States, Taylor Broek, Lawrence Livermore National Laboratory, Center for Accelerator Mass Spectrometry, Livermore, CA, United States, Yasuhiko T Yamaguchi, Lake Biwa Environmental Research Institute, Otsu, Shiga, Japan, Thomas P Guilderson, LLNL, Livermore, CA, United States and Matthew D. McCarthy, University of California Santa Cruz, Ocean Sciences Department, Santa Cruz, CA, United States
Molecular Imaging of the Community Metabolome of a Phytoplankton Bloom in the California Current Ecosystem (309892)
Daniel Petras1, Brandon M Stephens2, Sara R. Rivera2, Pieter Dorrestein1 and Lihini Aluwihare2, (1)University of California San Diego, Collaborative Mass Spectrometry Innovation Center, La Jolla, CA, United States, (2)University of California San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States
Dissolved organic matter in an ocean desert: the South Pacific Gyre (305438)
Helena Osterholz, University of Oldenburg, Oldenburg, Germany
The biodegradability of hydrothermally altered deep-sea dissolved organic matter (317191)
Christian Tobias Hansen, University of Oldenburg, ICBM, Oldenburg, Germany, Jutta Niggemann, University of Oldenburg, Oldenburg, Germany, Beatriz Elizabeth Noriega-Ortega, University of Oldenburg, Institute for Chemistry and Biology of the Marine Environment (ICBM), Research Group for Marine Geochemistry (ICBM-MPI Bridging Group), Oldenburg, Germany, Meinhard Simon, University of Oldenburg, Institute for Chemistry and Biology of the Marine Environment (ICBM), Biology of Geological Processes - Aquatic Microbial Ecology, Oldenburg, Germany, Bach Wolfgang, MARUM - University of Bremen, Bremen, Germany and Thorsten Dittmar, Carl von Ossietzky University Oldenburg, Institute for Chemistry and Biology of the Marine Environment (ICBM), Oldenburg, Germany
Linking hydrology and long-term dissolved organic matter compositional dynamics in a sub-tropical wetland system (314233)
Peter Regier1, Kaelin Cawley2, Wenxi Huang1 and Rudolf Jaffe1, (1)Florida International University, Southeast Environmental Research Center and Dept. of Chemistry and Biochemistry, Miami, FL, United States, (2)National Ecological Observatory Network, Boulder, CO, United States
Tracing the Fate of Tropical Peatland Dissolved Organic Carbon in Coastal Waters of Borneo Using Optical Spectroscopy and Extracellular Enzyme Activities (307114)
Patrick Martin, Nanyang Technological University, Asian School of the Environment, Singapore, Singapore, Nagur RC Cherukuru, Commonwealth Scientific and Industrial Research Organisation, Oceans and Atmosphere, Canberra, Australia, Ashleen S. Y. Tan, Nanyang Technological University, Asian School of the Environment, Singapore, Aazani Mujahid, Universiti Malaysia Sarawak, Malaysia and Moritz Müller, Swinburne University of Technology, Malaysia

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