OB010
Exploring the Reactivity of Marine Dissolved Organic Matter with Consequences for Carbon Sequestration

Session ID#: 255482

Session Description:
Marine dissolved organic matter (DOM) originates from both natural and anthropogenic sources, including contaminants and plastics. It is also a byproduct of intentional oceanic carbon storage efforts that employ biological processes to transform and sequester carbon. The extent to which DOM stores carbon is dependent on its reactivity which can be influenced by chemical environment, microbes and concentration. While labile DOM is biologically degraded within days, recalcitrant DOM persists much longer, playing a crucial role in long-term carbon sequestration. Recalcitrant DOM is subject to several removal processes, such as biodegradation, photodegradation, scavenging, geothermal transformations, and loss to the atmosphere as volatile compounds. Understanding the biogeochemical pathways leading to recalcitrant DOM formation and removal is vital for grasping its involvement in carbon storage.

This session seeks to deepen our knowledge of DOM reactivity in the ocean, focusing on processes with relevance to DOM long-term storage. We invite research on DOM from both natural and anthropogenic origins, utilizing observations, experiments, and modeling in coastal and open ocean settings. Multidisciplinary studies that shed light on the diverse formation and fates of recalcitrant DOM are particularly encouraged.

Co-Sponsor(s):
  • Carbon Management -
  • Climate and Ocean Change -
  • Coastal and Estuarine Biology and Biogeochemistry -
Index Terms:

1615 Biogeochemical cycles, processes, and modeling [GLOBAL CHANGE]
4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4850 Marine organic chemistry [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Student/Early Career Chair:  Valentina Amaral, Universidad de la República, Montevideo, Uruguay
Primary Chair:  Cristina Romera-Castillo, Institut de Ciencies del Mar (CSIC), Barcelona, Spain
Co-chairs:  Dennis A Hansell, University of Miami, Miami, FL, United States and Sarah K Bercovici, National Oceanography Center, Sothampton, United Kingdom
 
Long-Term Photochemical and Microbial Alterations Lead to the Compositional Convergence of Algal and Terrestrial Dissolved Organic Matter (1942614)
Shilin An1, Xosé Antón Álvarez Salgado2, Yingxun Du1, Yunlin Zhang1 and Organic Geochemistry Lab, CSIC Institute of Marine Research, (1)Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China, (2)Organic Geochemistry Lab, CSIC Institute of Marine Research, Vigo, Spain
 
DOC distribution and seasonal dynamics in the East Greenland Current (2010219)
Will Major1, Bieito Fernandez Castro2, Sarah K Bercovici3, Xosé Antón Álvarez Salgado4, Robyn Tuerena5, Cynthia Deumousseaud1, Annika Morische6, Kjetil Våge7, Diana Tudorache1 and Izzy White1, (1)University of Southampton, Southampton, United Kingdom, (2)University of Southampton, School of Ocean and Earth Science, Southampton, United Kingdom, (3)National Oceanography Center, Sothampton, United Kingdom, (4)Organic Geochemistry Lab, CSIC Institute of Marine Research, Vigo, Spain, (5)Scottish Association for Marine Science, Oban, United Kingdom, (6)Aarhus University, Aarhus, Denmark, (7)Geophysical Institute, University of Bergen and Bjerknes Centre for Climate Research, Bergen, Norway
 
Composition and bioavailability of dissolved organic matter derived from marine nitrifying archaea and bacteria (2011838)
Lillian C Henderson, University of California Santa Barbara, Marine Science Institute, Santa Barbara, United States, Chance English, University of California Santa Barbara, Marine Science Institute/Earth Research Institute, Santa Barbara, United States, Craig A Carlson, University of California Santa Barbara, Marine Science Institute/Department of Ecology, Evolution and Marine Biology, Santa Barbara, United States; Bermuda Institute of Ocean Sciences, Arizona State University, St. George's, Bermuda and Alyson E Santoro, University of California Santa Barbara, Department of Ecology, Evolution, and Marine Biology, Santa Barbara, United States
 
The Secret Life of Marine Gels: Exploring the dynamics of Transparent exopolymer particles (TEP) and Coomassie-stainable particles (CSP) cycling and Stoichiometry in the North Pacific Subtropical Gyre. (2015855)
Stella Rowley1, Kieran Curran2, Tracy A Villareal3 and Robert T Letscher1, (1)University of New Hampshire, Earth Sciences, Durham, United States, (2)University of New Hampshire, Ocean Process Analysis Laboratory, Durham, United States, (3)The University of Texas at Austin, Port Aransas, TX, United States
 
Beyond First-Order: A New Kinetic Framework for Marine DOC Turnover (2020116)
Sinikka T. Lennartz1, Samar Khatiwala2 and Thorsten Dittmar1, (1)University of Oldenburg, Institute for Chemistry and Biology of the Marine Environment (ICBM), Oldenburg, Germany, (2)University of Oxford, Department of Earth Sciences, Oxford, United Kingdom
 
Centennial-Scale Storage of DOC within Arctic Ocean Deep Waters Controlled by Subzero Temperatures (2020166)
Robert T Letscher, University of New Hampshire, Earth Sciences, Durham, United States, William M Smethie Jr, Lamont -Doherty Earth Observatory, Palisades, United States and Dennis A Hansell, University of Miami, Miami, FL, United States
 
Hydrothermally Induced Refractory DOC Sinks in the Deep Pacific Ocean (2020344)
Dennis A Hansell1, Christopher R German2, Craig A Carlson3, Ellen R M Druffel4, William J Jenkins2, Susan Q Lang5 and Brandy M Toner6, (1)University of Miami, Miami, FL, United States, (2)WHOI, Woods Hole, MA, United States, (3)University of California Santa Barbara, Marine Science Institute/Department of Ecology, Evolution and Marine Biology, Santa Barbara, United States, (4)University of California, Irvine, Irvine, United States, (5)Woods Hole Oceanographic Institution, Geology and Geophysics, Woods Hole, United States, (6)University of Minnesota Twin Cities, Department of Soil, Water, and Climate, St. Paul, United States
 
The Ecology of Molecules, and Why Diversity Matters (2025630)
Thorsten Dittmar1, Sinikka T. Lennartz1, Sahithya Phani Babu Vemulapalli1 and Daniel Petras2, (1)University of Oldenburg, Institute for Chemistry and Biology of the Marine Environment (ICBM), Oldenburg, Germany, (2)University of California, Riverside, Department of Biochemistry, Riverside, United States
 
Dissolved Organic Carbon Cycling in the Arctic: Insights from Radiocarbon Analysis (2029123)
Sunmin Oh1, Jeomshik Hwang1, Dr. Taehee Na, Ph.D1, Jinyoung Jung2, Eun-Jin Yang2 and Kyongho Cho2, (1)Seoul National University, Seoul, South Korea, (2)Korea Polar Research Institute, Incheon, South Korea
 
Simulated Changes in the Deep Ocean Reservoir of Refractory Dissolved Organic Carbon Mediated by Hydrothermal Fluid Fluxes (2029214)
James Lin, University of New Hampshire, Earth Science, Durham, United States, Timothy J DeVries, University of California Santa Barbara, Earth Research Institute, Santa Barbara, United States and Robert T Letscher, University of New Hampshire, Earth Sciences, Durham, United States
 
Microbial Degradation of Kelp-Derived Dissolved Organic Matter in the Context of Carbon Sequestration (2029913)
Sophia Riazi-Sekowski1, Sarah Douglas2, Greg Drozd1, Manoj Kamalanathan2 and Nichole Price2, (1)Colby College, Chemistry, Waterville, United States, (2)Bigelow Laboratory for Ocean Sciences, East Boothbay, United States
 
LC-MS/MS-based identification of chemical structures within marine refractory dissolved organic matter (2031257)
Margot Elizabeth White, University of British Columbia, Department of Earth, Ocean and Atmospheric Sciences, Vancouver, Canada, Irina Koester, Woods Hole Oceanographic Institution, Woods Hole, United States, Ralph Torres, University of California San Diego, Scripps Institution of Oceanography, La Jolla, United States, Lucia Cancelada, University of California San Diego, Department of Chemistry & Biochemistry, La Jolla, CA, United States, Tran Nguyen, Scripps Institution of Oceanography, La Jolla, United States, Michael Beman, University of California Merced, Life and Environmental Sciences, Merced, United States, Pieter Dorrestein, University of California San Diego, Collaborative Mass Spectrometry Innovation Center, La Jolla, CA, United States and Lihini Aluwihare, Scripps Institution of Oceanography, Geosciences Research Division, La Jolla, United States
 
Enhanced Bacterial Community Diversity Facilitates Degradation of Terrigenous DOM in Estuarine and Coastal Waters (2034286)
Wei Zhang1, Jie Xu1, Ding He2 and Zekun Zhang2, (1)University of Macau, Ocean Science and Technology and Centre for Regional Oceans, Macau, China, (2)Hong Kong University of Science and Technology, Hong Kong, Hong Kong
 
Regional disparities in carbon storage and recalcitrance in the Indo-Pacific Warm Pool: Insights from DOC biogeochemical cycles (2036558)
Jiaxin Chen1, Yu Wang2, Yibin Huang2, Qi Chen3, Chenwen Xue2, Jinxin Xu2, Xiaomeng Wang4, Chen He5, Shi Quan6, Helena Osterholz7, Christian Lønborg8, Yu Cong2, Nianzhi Jiao9 and Qiang Zheng10, (1)State Key Laboratory for Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China, (2)Xiamen University, Xiamen, China, (3)Oregon State University, Department of Microbiology, Corvallis, United States, (4)Southern University of Science and Technology, Shenzhen, China, (5)China University of Petroleum, Beijing, China, (6)China University of Petroleum, State Key Laboratory of Heavy Oil Processing, Beijing, China, (7)Leibniz Institute for Baltic Sea Research, Marine Chemistry, Rostock, Germany, (8)Aarhus University, Roskilde, Denmark, (9)Xiamen University, Innovation Research Center for Carbon Neutralization, Fujian Key Laboratory of Marine Carbon Sequestration, Xiamen, China, (10)State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China
 
The Addition of Methylphosphonate Enhances Microbial Remineralization of Sargassum-derived Dissolved Organic Carbon in the Sargasso Sea (2040270)
Danielle Cox1,2, Zoe Skinner3, Maya Leighton3,4, Kristy Sanchez Vega3,5, Shuting Liu6, Rachel Jane Parsons7 and Craig A Carlson8,9, (1)Anchor Consultations LLC, Miami, United States, (2)University of California Santa Barbara, Earth Science, Santa Barbara, United States, (3)Bermuda Institute of Ocean Sciences, Microbiology, St.George's, Bermuda, (4)University of North Carolina at Wilmington, Wilmington, United States, (5)McGill University, Montreal, Canada, (6)Kean University, Union, United States, (7)Arizona State University (ASU)-Bermuda Institute of Ocean Sciences (BIOS), St.George's, Bermuda, (8)University of California Santa Barbara, Department of Ecology, Evolution, and Marine Biology, Santa Barbara, United States, (9)Bermuda Institute of Ocean Sciences, St.George's, Bermuda
 
Mechanisms of Recalcitrant Dissolved Organic Matter Formation via Organic Matter Sulfurization (2040396)
Marianna Karagiannis1, Natalya Evans2 and Morgan R Raven1, (1)University of California Santa Barbara, Department of Earth Science, Santa Barbara, United States, (2)Dalhousie University, Department of Oceanography, Halifax, Canada
 
Spatial and Temporal Variability of Dissolved Organic Matter during the Spring Bloom in the Labrador Sea. (2042174)
Nidhi ., Memorial University of Newfoundland, Environmental Sciences, St. John's, NF, Canada and Heather E Reader, Memorial University of Newfoundland, Department of Chemistry, St John's, NF, Canada
 
Nonlinear Salinity Dependence of CO Photoproduction in the Northwest Atlantic: Reevaluating CO as a Proxy for DIC Photoproduction (2043321)
Emily Friden1, Abigail Geschwindt1, Leanne C. Powers2 and David J Kieber2, (1)SUNY College of Environmental Science and Forestry, Chemistry, Syracuse, United States, (2)State University of New York, College of Environmental Science and Forestry, Department of Chemistry, Syracuse, United States
 
Reactivity of dissolved organic carbon exudates from marine macrophytes in response to temperature and seasonality (2043825)
Linda Wegley Kelly1, Lais F.O. Lima1, Nathalie Henriksen1, Milou Arts2, Craig A Carlson3, Chance English4, Andreas Haas5, Catherine Mullenmeister6, Craig E Nelson7, Daniel Petras8 and Jennifer Smith9, (1)Scripps Institution of Oceanography, La Jolla, United States, (2)Royal Netherlands Institute for Sea Research, Marine Microbiology & Biogeochemistry, Den Burg, Netherlands, (3)University of California Santa Barbara, Marine Science Institute/Department of Ecology, Evolution and Marine Biology, Santa Barbara, United States, (4)University of California Santa Barbara, Marine Science Institute/Earth Research Institute, Santa Barbara, United States, (5)Royal Netherlands Institute for Sea Research, Marine Microbiology & Biogeochemistry, Den Hoorn, Netherlands, (6)UC San Diego, Marine Biology Research Division, Scripps Institution of Oceanography, San Diego, CA, United States, (7)University of Hawaii at Manoa, HI, United States, (8)University of California, Riverside, Department of Biochemistry, Riverside, United States, (9)Scripps Institution of Oceanography, UC San Diego, La Jolla, CA, United States
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