B32C:
Soil Organic Matter: Mechanisms of Stabilization and Change I


Session ID#: 8274

Session Description:
Soils are essential components of the Critical Zone, and are both responders and drivers of the most critical environmental changes facing the earth during the Anthropocene. Soil organic matter dynamics play a major role in determining C storage in ecosystems and in regulating atmospheric CO2 concentrations. How will climate change and man’s alteration of the terrestrial landscape affect soil organic matter dynamics? This session will focus on empirical and modeling studies of soils and carbon: storage potential, mechanisms of stabilization/ destabilization/ long term storage, and ecosystem vulnerability.
Primary Convener:  Kate Lajtha, Oregon State University, Corvallis, OR, United States
Conveners:  Marc G Kramer, University of Florida, Soil and Water Science Department, Ft Walton Beach, FL, United States and Nancy Cavallaro, USDA Washington DC, Washington, DC, United States
Chairs:  Kate Lajtha, Oregon State University, Corvallis, OR, United States, Marc G Kramer, Washington State University Vancouver, School of the Environment, Vancouver, WA, United States and Nancy Cavallaro, USDA Washington DC, Washington, DC, United States
OSPA Liaison:  Nancy Cavallaro, USDA Washington DC, Washington, DC, United States

Cross-Listed:
  • GC - Global Environmental Change
Index Terms:

0414 Biogeochemical cycles, processes, and modeling [BIOGEOSCIENCES]
0428 Carbon cycling [BIOGEOSCIENCES]
0439 Ecosystems, structure and dynamics [BIOGEOSCIENCES]
0486 Soils/pedology [BIOGEOSCIENCES]

Abstracts Submitted to this Session:

Ironing out the details of soil organic matter cycling: The unique role of Fe-bearing minerals in regulating organic matter transformation in soils (71073)
Katherine A Heckman1, Corey R Lawrence2, Jennifer W W Harden2, Jon Crate3 and Chris Swanston4, (1)USDA Forest Service, Northern Research Station, Vallejo, CA, United States, (2)USGS California Water Science Center Menlo Park, Menlo Park, CA, United States, (3)FAI Pharmaceutical and Biopharma Division, FAI testing services, Marietta, GA, United States, (4)US Forest Service, Northern Institute of Applied Climate Science, Houghton, MI, United States
Physical vs. Chemical Weathering Controls of Soils’ Capacity to Store Carbon: Hillslope Transects under Different Climatic Conditions (Invited) (75388)
Kyungsoo Yoo, Univ of MN-Soil, Water&Climate, St. Paul, MN, United States, Adrian Allan Wackett, University of Minnesota Twin Cities, Department of Soil, Water, and Climate, St. Paul, United States, Ronald Amundson, University of California Berkeley, Berkeley, CA, United States and Arjun M Heimsath, Arizona State University, School of Earth and Space Exploration, Tempe, United States
Thermochemical 14C Spectra and Carbon Turnover Time in Soils – a (Changing?) Latitudinal Gradient? (Invited) (82510)
Brad E Rosenheim, University of South Florida Tampa, College of Marine Science, Saint Petersburg, FL, United States, Lael Vetter, Tulane University of Louisiana, Department of Earth and Environmental Sciences, New Orleans, United States, Valier Galy, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, Alain F Plante, University of Pennsylvania, Earth & Environmental Science, Philadelphia, PA, United States, Gesine Mollenhauer, Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, Jordon Dennis Hemingway, Massachusetts Institute of Technology, Earth, Atmospheric & Planetary Science, Cambridge, MA, United States, Katherine E Grant, Cornell University, Ithaca, NY, United States and Louis A Derry, Cornell University, Department of Earth and Atmospheric Sciences, Ithaca, NY, United States
Soil Organic Carbon Sources of Respired CO2 in a Mid-successional North Temperate Forest (85832)
Nicholas L Medina1, Pierre-Joseph Hatton1,2, Jim Le Moine1 and Knute John Nadelhoffer1, (1)University of Michigan Ann Arbor, Ecology and Evolutionary Biology, Ann Arbor, MI, United States, (2)CUNY Queens College, New York, NY, United States
Reading the Molecular Code in Soils (84372)
Maggie Mae Bowman1, Malak M Tfaily2, Sarah L O'Brien3, Nikola Tolic4, Julie D Jastrow3 and James E Amonette1, (1)Pacific Northwest National Laboratory, Richland, WA, United States, (2)University of Arizona, Department of Environmental Sciences, Tucson, United States, (3)Argonne National Laboratory, Argonne, IL, United States, (4)Pacific Northwest National Laboratory, Environmental Molecular Sciences Laboratory, Richland, WA, United States
Ectomycorrhizal fungi increase soil carbon storage: molecular signatures of mycorrhizal competition driving soil C storage at global scale (75869)
Colin Averill, Funga PBC, Austin, United States, Brianna K Barry, University of Texas at Austin, Austin, TX, United States and Christine Hawkes, University of Texas at Austin, Integrative Biology, Austin, TX, United States
Long-term variation in above and belowground plant inputs alters soil organic matter biogeochemistry at the molecular-level (Invited) (63550)
Myrna J Simpson1, Oliva Pisani1, Lisa Lin1, Olivia Lun1, Andre Simpson2, Kate Lajtha3 and Knute John Nadelhoffer4, (1)University of Toronto, Toronto, ON, Canada, (2)University of Toronto at Scarborough, Department of Physical and Environmental Sciences, Toronto, ON, Canada, (3)Oregon State University, Corvallis, OR, United States, (4)Univ of Mich- Eco & Evol Bio, Ann Arbor, MI, United States

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