B23H:
Soil Organic Matter and the Global Carbon Cycle: Mechanisms for Accumulation and Loss in a Changing World III

Submit an Abstract to this Session



Session ID#: 32158

Session Description:
The reservoir of carbon contained in soil organic matter is exceedingly large. However the mechanisms for it’s accumulation, retention and loss are not well understood. Our ability to predict how climate change and man’s alteration of the terrestrial landscape affect soil organic matter dynamics ultimately depend on a deeper understanding of the underlying mechanisms. 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. Isotopic, geochemical, spectroscopic and other novel molecular techniques that probe deeper into the fate and function of organic matter across spatial and temporal scales are especially encouraged.
Primary Convener:  Marc G Kramer, Washington State University Vancouver, School of the Environment, Vancouver, WA, United States
Conveners:  Kate Lajtha, Oregon State University, Corvallis, OR, United States and Nancy Cavallaro, USDA Washington DC, Washington, DC, United States
Chairs:  Marc G Kramer, Washington State University Vancouver, School of the Environment, Vancouver, WA, United States and Kate Lajtha, Oregon State University, Corvallis, OR, United States
OSPA Liaison:  Nancy Cavallaro, USDA Washington DC, Washington, DC, United States
Index Terms:

0414 Biogeochemical cycles, processes, and modeling [BIOGEOSCIENCES]
0428 Carbon cycling [BIOGEOSCIENCES]
0454 Isotopic composition and chemistry [BIOGEOSCIENCES]
0486 Soils/pedology [BIOGEOSCIENCES]

Abstracts Submitted to this Session:

Formation and Stability of Microbially Derived Soil Organic Matter (Invited) (277616)
Mark P Waldrop1,2, Courtney Creamer3, Andrea L Foster4, Corey R Lawrence5, Jack W Mcfarland6 and Marjorie S Schulz1, (1)USGS Western Regional Offices Menlo Park, Menlo Park, CA, United States, (2)US Geological Survey, Geology, Minerals, Energy, and Geophysics Science Center, Menlo Park, United States, (3)USGS, Geology, Minerals, Energy, and Geophysics Science Center, Moffett Field, United States, (4)USGS Geology, Minerals, Energy, and Geophysics Science Center, Menlo Park, CA, United States, (5)US Geological Survey, Geosciences and Environmental Change Science Center, Denver, United States, (6)US Geological Survey, Geology, Minerals, Energy, and Geophysics Science Center, Moffett FIeld, United States
Microbial Ecology of Soil Aggregation in Agroecosystems (291779)
Kirsten S. Hofmockel1, Sheryl Bell2, Malak Tfailly1, Allison Thompson3 and Stephen Callister3, (1)Pacific Northwest National Laboratory, Richland, WA, United States, (2)Iowa State University, Ames, IA, United States, (3)Pacific Northwest National Laboratory, Earth and Biological Sciences Directorate, Richland, WA, United States
New molecular insights into the pools and mechanisms of Arctic soil organic matter decomposition under warming (296361)
Baohua Gu, Oak Ridge National Laboratory, Environmental Sciences Division, Oak Ridge, TN, United States and Hongmei Chen, Ziming Yang, Rosalie K. Chu, Nikola Tolic, Liyuan Liang, David E. Graham, Stan D. Wullschleger
Soil mixing and transport increase inventories of mineral surface area and organic carbon, with systematic shifts in C/N, δ13C, and δ15N, along a forested hillslope transect (299954)
Beth Fisher, University of Minnesota Twin Cities, Minneapolis, MN, United States, Kyungsoo Yoo, Univ of MN-Soil, Water&Climate, St. Paul, MN, United States, Anthony Keith Aufdenkampe, LimnoTech, Central Region Office, Ann Arbor, MI, United States, Edward A Nater, Univ of MN /Soil Water&Climate, St. Paul, United States, Rolf E Aalto, University of Exeter, Geography, Exeter, EX4, United Kingdom and Julia Marquard, University of Exeter, Geography, Exeter, United Kingdom
Substrate biochemistry control on the pathways for the formation of soil organic matter (232617)
Luis Fernando Almeida1, Luis Colocho Hurtarte2, Ivan Francisco Souza3, Emanuelle M Barros3, Leonardus Vergutz3 and Ivo Ribeiro Silva3, (1)UFV Federal University of Vicosa, Vicosa, Brazil, (2)Technische Universität München, Soil Science Department, Friesing, Germany, (3)UFV Federal University of Vicosa, Soil Science Department, Vicosa, Brazil
Drivers of lignin composition in boreal forest organic soils across a climate gradient (241477)
Allison Myers-Pigg, Memorial University of Newfoundland, St John's, Canada, Karl Kaiser, Texas A & M University at Galveston, Marine Sciences, Galveston, TX, United States, Ronald H Benner, University of South Carolina, Marine Science Program and Department of Biological Sciences, Columbia, SC, United States and Susan E Ziegler, Memorial University of Newfoundland, Earth Science, St John's, NL, Canada
REDUCING UNCERTAINTY IN THE DAYCENT MODEL OF HETEROTROPHIC RESPIRATION WITH A MORE MECHANISTIC REPRESENTATION OF MICROBIAL PROCESSES.  (265054)
Danielle Berardi, University of Idaho, Institute for Innovative Climate Solutions, Moscow, ID, United States, Nuria Gomez-Casanovas, Energy Biosciences Institute, University of Illinois, Urbana, IL, United States and Tara W Hudiburg, University of Idaho, College of Natural Resources, Moscow, ID, United States

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