The deadline to submit a session, town hall, or pre-conference workshop proposal for AGU25 has passed. Please search for and review proposed sessions below. Please note this site is frozen as of 4/29/25 and will not reflect any changes to proposals made after this date.


Conveners will be contacted by the AGU25 Program Committee with any requests for mergers or edits to proposals. Conveners will be notified of the acceptance of their proposal in mid-June.


Abstract submissions will also open in mid-June and the deadline for abstract submissions is 30 July, 2025.


Please visit the AGU25 website for more information or please contact AGU with any questions.

Session Proposal: Organic Matter Persistence: From Molecules to Microbes to Matrices (AGU25)

B067
Organic Matter Persistence: From Molecules to Microbes to Matrices

Session ID#: 252418

Session Description:
What governs the persistence or turnover of organic matter (OM) in belowground environments remains a key question across biogeochemical, hydrogeochemical, and geomicrobiological fields. This session invites contributions that examine molecular, microbial, kinetic and abiotic controls on OM dynamics in soils, sediments, and aquatic systems. We welcome studies on OM origin, composition, and microbial processing — including necromass production and transformation — as well as interactions with minerals, redox conditions, sorption dynamics, and other geochemical or physicochemical factors. Submissions may span experimental, observational, or modeling approaches and include methods such as molecular or multi-omics characterization, isotopic tracing, spectroscopy, imaging, and data-driven or mechanistic modeling. By drawing together research across disciplines and scales, this session aims to advance a mechanistic understanding of OM fate and function in the critical zone and subsurface environments.
Index Terms:

0414 Biogeochemical cycles, processes, and modeling [BIOGEOSCIENCES]
0428 Carbon cycling [BIOGEOSCIENCES]
0463 Microbe/mineral interactions [BIOGEOSCIENCES]
0470 Nutrients and nutrient cycling [BIOGEOSCIENCES]
Primary Convener:  Brianna Finley, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
Convener:  Romy Chakraborty, Lawrence Berkeley National Laboratory, Berkeley, United States
Student/Early Career Convener:  Brianna Finley, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
 
Does secondary mineral formation compete or cooperate with organic matter storage? (Invited) (1868617)
Mark A Torres1, William Larsen2, Jonah Bernstein-Schalet3, Miriam Gammerman4, Yi Hou5, Daniel Enrique Ibarra3, Preston Cosslett Kemeny6, Sebastian Muñoz3, Evan Joseph Ramos7, Tao Sun4 and Kly D Suquino8, (1)Rice University, Department of Earth, Environmental, and Planetary Sciences, Houston, TX, United States, (2)Rice University, Houston, United States, (3)Brown University, Department of Earth, Environmental and Planetary Sciences, Providence, United States, (4)Rice University, Department of Earth, Environmental and Planetary Sciences, Houston, United States, (5)ETH Zurich, Geological Institute, Department of Earth Sciences, Zurich, Switzerland, (6)Woods Hole Oceanographic Institution, Marine Chemistry & Geochemistry, Woods Hole, United States, (7)University of Pittsburgh, Department of Geology and Environmental Science, Pittsburgh, PA, United States, (8)Rice University, Department of Earth, Environment, and Planetary Science, Houston, United States
 
Distribution and Abiotic Contributions of Microbial Extracellular Enzymes Indicate Limitations in Assumptions of Microbially-Explicit Soil Organic Carbon Models (1877708)
Minseon Kim, Seoul National University, Seoul, Korea, Republic of (South) and Kyungjin Min, Seoul National University, Agricultural Biotechnology, Seoul, South Korea
 
Cryo-Focused Pyrolysis GC/MS as a Tool for Tracing Organic Matter Sources and Chemical Diversity in Soils from Varied Ecosystems (1895757)
Abrar Shahriar1, Mavrik Zavarin1, Erin E Nuccio1, Katherine Grant2, Karis Mcfarlane1, Jennifer Pett-Ridge3, Daniel Toews4, Jason Sexton4, Rebecca Ryals5, Joy Baccei4, Aiden Berndt6, Rene Boiteau6, Ishtiaq Ahmed Jawad7, Yu Yang7, Sheel Bansal8, Edward J O'Loughlin9, Roser Matamala10 and Keith D. Morrison1, (1)Lawrence Livermore National Laboratory, Physical and Life Sciences Directorate, Livermore, United States, (2)Lawrence Livermore National Laboratory, Livermore, United States, (3)Lawrence Livermore National Laboratory, Physical and Life Sciences Directorate, Livermore, CA, United States, (4)University of California Merced, Merced, United States, (5)University of California Merced, Life and Environmental Sciences, Merced, CA, United States, (6)University of Minnesota, Department of Chemistry, Minneapolis, United States, (7)University of Nevada Reno, Reno, United States, (8)U.S. Geological Survey, Northern Prairie Wildlife Research Center, Jamestown, United States, (9)Argonne National Laboratory, Biosciences Division, Argonne, United States, (10)Argonne National Laboratory, Environmental Science Division, Argonne, IL, United States
 
Microbial Biofilms and Their Implications for Life Detection in Serpentinizing Systems (1902386)
Alexandra Grabowski, Michigan State University, East Lansing, MI, United States, Sarah Gonzalez Henao, Michigan State University, Department of Earth and Environmental Sciences, Department of Microbiology, Genetics, and Immunology, East Lansing, United States and Matthew O Schrenk, Michigan State University, Department of Earth and Environmental Sciences, Department of Microbiology, Genetics, and Immunology, East Lansing, MI, United States
 
Molecular diversity of organic matter as a novel concept in aquatic and terrestrial systems : A state-of-the-art summary (1911403)
Stephanie Remke, Cornell University, Ithaca, NY, United States, Rachelle LaCroix, Newfield, NY, UNITED STATES and Johannes Lehmann, Cornell University, School of Integrative Plant Science, Ithaca, United States
 
Wildfires Enhance Soil Organic Matter Biodegradability (1917655)
Jacob VanderRoest1, Sean Fettrow2, Corey Broeckling3, Kya Sparks2, Amelia Skinner1, Michael J Wilkins2, Lydia Babcock-Adams4, Amy M McKenna4 and Thomas Borch1, (1)Colorado State University, Chemistry, Fort Collins, United States, (2)Colorado State University, Soil and Crop Sciences, Fort Collins, United States, (3)Colorado State University, Analytical Resources Core: Bioanalysis and Omics Lab, Fort Collins, United States, (4)Florida State University, National High Magnetic Field Laboratory, Tallahassee, United States
 
Soil porous microstructure control over soil organic matter mobility: a multimethod workflow for understanding chemistry-dependent organic matter binding in soil (1921508)
Tamas Varga1, Thomas W Wietsma2, Nicole Didonato3, Summer C. Duckworth4, Qian Zhao2, Nicholas A. Sconzo4, Anil Krishna Battu4, Jianqiu Zheng3, Xiaoliang He3, Devin Rippner5, Odeta Qafoku6, Mark Rockhold3 and Nikolla P Qafoku7, (1)Pacific Northwest National Laboratory, Environmental Molecular Sciences Laboratory, Richland, United States, (2)Pacific Northwest National Laboratory, Environmental Molecular Sciences Laboratory, Richland, WA, United States, (3)Pacific Northwest National Laboratory, Richland, WA, United States, (4)Pacific Northwest National Laboratory, Richland, United States, (5)United States Department of Agriculture, Agricultural Research Service, Horticultural Crops Production and Genetic Improvement Research Unit, Worksite, Prosser, United States, (6)Battelle Pacific Northwest, Richland, United States, (7)Pacific Northwest National Laboratory, Earth Sciences Division, Richland, United States
 
An experimental approach to iron-mediated removal of dissolved organic carbon in deep ocean hydrothermal plumes (1923495)
Charlotte Wing Man Lee1, Christopher R German2, Susan Q Lang2, Chiara Santinelli3 and Daniel Repeta1, (1)Woods Hole Oceanographic Institution, Department of Marine Chemistry and Geochemistry, Woods Hole, United States, (2)Woods Hole Oceanographic Institution, Department of Geology and Geophysics, Woods Hole, United States, (3)CNR National Research Council, Biophysics Institute, Pisa, Italy
 
Substrate partitioning and competition among fermenters, sulfate reducers and methanogens under sulfide stress in anaerobic digestion systems (1933614)
Gage Coon, Vieyiti Kouadio, Oliver E Jagoutz and Tanja Bosak, Massachusetts Institute of Technology, Earth, Atmospheric, and Planetary Sciences, Cambridge, United States
 
Organic Matter Preservation and Alteration in Silica Sinter Deposits from Active and Extinct Hydrothermal Systems (1936403)
Rui-Lin Cheng, Cornell University, Earth and Atmospheric Sciences, Ithaca, NY, United States, Carolina Munoz-Saez, Cornell University, Earth and Atmospheric Sciences, Ithaca, United States and Andrew D Czaja, University of Cincinnati Main Campus, Department of Geosciences, Cincinnati, United States
 
Relating Molecular Properties to the Persistence of Marine Organic Matter with Liquid Chromatography–Ultrahigh-Resolution Mass Spectrometry (1959207)
Rene Boiteau1,2 and Christian Dewey2,3, (1)University of Minnesota, Department of Chemistry, Minneapolis, MN, United States, (2)University of Minnesota, Department of Chemistry, Minneapolis, United States, (3)University of Delaware, Plant and Soil Science, Newark, United States
 
Elucidating the mineral-organic associations in cultivated temperate soils using a novel sequential extraction protocol (1964571)
Nikitha Saji1, Sakthi Kumaran2, Rangu Satish3, Eric Salas3, Robert Bennett4, Ashayah Walker3 and Royalty Hightower3, (1)Central State University, Wilberforce, OH, United States, (2)Central State University, Agricultural Research Development Program (ARDP), Wilberforce, OH, United States, (3)Central State University, Wilberforce, United States, (4)Central State University, Agricultural Research Development Program (ARDP), Wilberforce, United States
 
Rare Hexose in Soils Suggests an Unexplored Pool of Biochemical Recalcitrance (1980443)
Claudia M Boot1, Stephanie Cardinalli-Lemas2, Allison Haase3, Prithwiraj De4, Bethany Avera5, Peter Baas4 and Richard T Conant6, (1)Colorado State University, Chemistry, Fort Collins, United States, (2)Colorado State University, Ecosystem Science and Sustainability, Fort Collins, United States, (3)Colorado State University, Department of Chemistry, Fort Collins, United States, (4)Colorado State University, Natural Resource Ecology Laboratory, Fort Collins, United States, (5)Colorado State University, Soil and Crop Sciences, Fort Collins, United States, (6)Colorado State University, Ecosystem Science and Sustainability, Fort Collins, CO, United States
 
Hydrothermal History Shapes Fate of Dissolved Organic Nitrogen Compounds in Al(III)-Fe(III) (Oxy)hydroxide Systems (1986918)
Omar Richard Harvey, Texas Christian University, Geological Sciences, Fort Worth, TX, United States, Burke Chadfield Leonce, Texas Christian University, Fort Worth, United States and Kavya Athipatla, American Geophysical Union, Southlake, United States
 
How do organic matter properties shape microbial traits in deep salt marsh sediments? (1991608)
Jennifer L Bowen, Northeastern University, Department of Marine and Environmental Sciences, Nahant, United States, Saad Abd Ar Rafie, Northeastern University, Department of Marine and Environmental Sciences, Boston, MA, United States, Ashley Bulseco, University of New Hampshire, Biological Sciences, Durham, United States and Joseph H Vineis, Marine Biological Laboratory, Ecosystems Center, Woods Hole, MA, United States
 
Intrinsic Ecosystem Drivers Outweigh Wildfire Effects on Soil Organic Carbon Properties at a Regional Scale (1996705)
Yewon Lee, University of Maryland College Park, Geology, College Park, MD, United States, Mengqiang Zhu, University of Maryland, Geology, College Park, United States, Oliver Chadwick, University of California, Santa Barbara, CA, United States, Jonathan L Deenik, University of Hawaiʻi at Mānoa, Tropical Plant and Soil Sciences, Honolulu, United States and Peter Vitousek, Stanford University, Biological Sciences, Stanford, CA, United States
 
Microbial Necromass Decomposition is Accelerated by Long-Term Warming-Induced Shifts in Soil CNP Availability (1998488)
María Montero Sanchez1, Cam Anderson1, A. Li Han Chan1, Emil Ruff2, Manuel Kleiner3, Melanie A Mayes4, Hannah Vanderscheuren2, Rachel Moser3, Liyuan He4, Aileen Jung2 and Kristen M DeAngelis1, (1)University of Massachusetts Amherst, Department of Microbiology, Amherst, United States, (2)Marine Biological Laboratory, Woods Hole, United States, (3)North Carolina State University Raleigh, Department of Plant and Microbial Biology, Raleigh, United States, (4)ORNL, Environmental Science Division, Oak Ridge, United States
See more of: Biogeosciences
<< Previous Session Proposal | Next Session Proposal >>