B24B:
Microbial-Mineral Regulation of Soil Organic Matter: Mechanisms, Experimental Approaches, and Models I

Submit an Abstract to this Session



Session ID#: 35311

Session Description:
Perturbations associated with global change (e.g., shifts in temperature, precipitation, vegetation) may cause linear, non-linear, or threshold changes in terrestrial C stocks, and are conceptualized and modeled in a variety of ways. However, soil carbon (C) dynamics remain a significant source of uncertainty in C cycle models and climate projections, in part from an incomplete understanding and representation of processes controlled by microorganisms, the stabilizing capacity of soil minerals and the interaction of these two drivers. In this session, we explore how our current approach to experiments and models are incorporating these stabilization and destabilization processes at multiple scales, including both the activity of microbes as both mediators and as secondary sources (via their necromass) of SOM. We particularly encourage submissions that employ novel approaches (i.e., molecular, stoichiometric) or utilize gradients to spark larger-scale perspectives on soil C dynamics and the consequences for ecosystem-scale C cycling.
Primary Convener:  Kevin Geyer, Young Harris College, Department of Biology, Young Harris, GA, United States
Conveners:  Caitlin Hicks Pries, Dartmouth College, Department of Biological Sciences, Hanover, NH, United States, Rose Z Abramoff, Lawrence Berkeley National Laboratory, Climate and Ecosystem Sciences Division, Berkeley, United States and Jeffrey A Bird, CUNY Queens College, Flushing, NY, United States
Chairs:  Caitlin Hicks Pries, Dartmouth College, Department of Biological Sciences, Hanover, NH, United States, Jeffrey A Bird, CUNY Queens College, Flushing, NY, United States, Kevin Geyer, Young Harris College, Department of Biology, Young Harris, GA, United States and Rose Z Abramoff, LSCE Laboratoire des Sciences du Climat et de l'Environnement, Gif-Sur-Yvette Cedex, France
OSPA Liaison:  Rose Z Abramoff, LSCE Laboratoire des Sciences du Climat et de l'Environnement, Gif-Sur-Yvette Cedex, France

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

0414 Biogeochemical cycles, processes, and modeling [BIOGEOSCIENCES]
0428 Carbon cycling [BIOGEOSCIENCES]
0465 Microbiology: ecology, physiology and genomics [BIOGEOSCIENCES]
0486 Soils/pedology [BIOGEOSCIENCES]

Abstracts Submitted to this Session:

Environmental context affects microbial ecophysiological mechanisms underpinning soil carbon storage under different land use (258919)
Ashish Anil Malik1,2, Jeremy Puissant2, Kate M Buckeridge3, Tim Goodall4, Nico Jehmlich5, Somak Chowdhury6, Gerd Gleixner6 and Robert Griffiths2, (1)University of California Irvine, Ecology & Evolutionary Biology, Irvine, CA, United States, (2)Centre for Ecology and Hydrology, Wallingford, United Kingdom, (3)Lancaster University, Lancaster, United Kingdom, (4)UK Centre for Ecology and Hydrology (UKCEH), Wallingford, United Kingdom, (5)Helmholtz Centre for Environmental Research, Leipzig, Germany, (6)Max Planck Institute for Biogeochemistry, Jena, Germany
Microbes Persist: Using a Systems Biology Approach to Reveal How the Soil Microbiome Shapes Soil Organic Matter (Invited) (276118)
Jennifer Pett-Ridge, Lawrence Livermore National Laboratory, Livermore, CA, United States
Grassland Soil Carbon Responses to Nitrogen Additions (Invited) (290841)
Kirsten S. Hofmockel1, Malak Tfailly2, Stephen Callister3, Lisa Bramer1 and Allison Thompson3, (1)Pacific Northwest National Laboratory, Richland, WA, United States, (2)Pacific Northwest National Laboratory, Environmental Molecular Sciences Laboratory, Richland, WA, United States, (3)Pacific Northwest National Laboratory, Earth and Biological Sciences Directorate, Richland, WA, United States
Decoupling of lignin and total litter decomposition across North American forest soils: a phenomenon to reconcile old and new paradigms of soil organic matter? (280252)
Steven J Hall, Iowa State University, Department of Ecology, Evolution, and Organismal Biology, AMES, United States and Kenneth Hammel, US Forest Products Laboratory, Madison, United States
Regulation of C:N:P stoichiometry of microbes and soil organic matter by optimizing enzyme allocation: an omics-informed model study (281752)
Yang Song, Oak Ridge National Laboratory, Climate Change Science Institute and Environmental Sciences Division, Oak Ridge, TN, United States, Qiuming Yao, Oak Ridge National Lab, Computer Science and Mathematics Division, Oak Ridge, TN, United States, Gangsheng Wang, University of Oklahoma, Institute for Environmental Genomics, Department of Microbiology and Plant Biology, Norman, OK, United States, Xiaojuan Yang, Oak Ridge National Laboratory, Environmental Sciences Division, Oak Ridge, United States and Melanie A Mayes, Oak Ridge National Laboratory, Environmental Science Division, Oak Ridge, TN, United States

See more of: Biogeosciences