372 Soil Organic Matter Cycling As a Key Critical Zone Process

Oral Session
SSSA Division: Soil Biology and Biochemistry
The “Critical Zone” (CZ) is defined as the Earth's permeable near-surface layer from the tops of the trees to the bottom of the groundwater, placing soils in a central position and role in CZ structure and function. Studying soil organic matter (SOM) cycling within the framework of CZ science involves linking small/molecular scale understanding of SOM dynamics to larger temporal and spatial scales. OM production, decay, mineralization, transport and persistence in soils thus must be examined in the context of concurrent, dynamic and bidirectional relationships with weathering and other surface and sub-surface processes. We will highlight how SOM research and CZ science combine to shape an evolving paradigm for evaluating how various soil state factors, soil forming processes, and ecosystem features contribute to OM cycling in soils. Presentations will encompass diverse CZ systems (agriculture, temperate and tropical forest, mountain, wetland), and reach beyond the typical confines of soil biochemistry and biology to embrace pedology, mineralogy, chemistry, physics and hydrology. We invite contributions from across these diverse disciplines who address SOM production, transformations, and fates, and especially encourage contributions from those working across a range of temporal or spatial scales.

Approved for 3.0 SW CEUs


SSSA Division: Soil Chemistry
SSSA Division: Forest, Range and Wildland Soils
SSSA Division: Pedology
SSSA Division: Soil Mineralogy
SSSA Division: Wetland Soils

Wednesday, November 9, 2016: 8:00 AM-11:30 AM
Phoenix Convention Center North, Room 123

Alain F. Plante
8:00 AM
Introductory Remarks
8:05 AM
Impacts of Hydrous Manganese Oxide and Goethite on Soil Organic Carbon Reactivity.
Jason W. Stuckey, University of Delaware; Christopher Goodwin, University of Delaware; Jian Wang, Canadian Light Source Inc. University of Saskatchewan; Louis A. Kaplan, Stroud Water Research Center; Prian Vidal-Esquivel, University of Delaware; Thomas P Beebe Jr., University of Delaware; Donald L Sparks, University of Delaware
8:20 AM
The Effect of Prairie Burning on Soil Organic Matter Dynamics and Physical Structure - Implications for Critical Zone Functions.
Sara E. Vero, Kansas State University; Saugata Datta, Kansas State University; Pamela L Sullivan, University of Kansas; Matthew F Kirk, Kansas State University; Pamela Kempton, Kansas State University
8:35 AM
8:50 AM
Temporal Variation of Water and Carbon Influence the Spatial Distribution of Upland Iron Reduction in Soils.
Caitlin Hodges, University of Georgia-Athens; John Mallard, Duke University; Daniel Markewitz, University of Georgia - Athens; Aaron Thompson, University of Georgia-Athens; Brian McGlynn, Duke University
9:05 AM
Molecular Characterization of Dissolved Organic Matter As Influenced By Redox Oscillation Conditions.
Mohammad Afsar, University of Delaware; Yan Jin, University of Delaware
9:20 AM
Effects of Alternative Farming Systems on Soil Organic Matter Pools and Nitrous Oxide Emissions.
Sean Bloszies, North Carolina State University; S. Chris Reberg-Horton, North Carolina State University; Shuijin Hu, North Carolina State University
9:35 AM
Soil Organic Matter Stabilization By Fe-C Interactions in Temperate and Tropical Soils: A Cross-CZO Comparison.
Elizabeth K Coward, University of Pennsylvania; Aaron Thompson, University of Georgia-Athens; Daniel Markewitz, University of Georgia - Athens; Daniel deB. Richter, Duke University; Alain F. Plante, University of Pennsylvania
9:50 AM
Coupled Metagenomic and Chemical Analyses of Degrading Fungal Necromass and Implications for Fungal Contributions to Stable Soil Organic Carbon.
Louise M. Egerton-Warburton, Chicago Botanic Garden; Kathryn M Schreiner, University of Minnesota Duluth; Benjamin S.T. Morgan, Northwestern University; Jeremy Schultz, Southern Illinois University; Neal E Blair, Northwestern University
10:05 AM
Sequential Reaction of Dissolved Organic Matter with Subsurface Soils, Effect of Dry and Wet Cycles.
Yaniv Olshansky, University of Arizona; Rob Root, University of Arizona; Jon Chorover, University of Arizona
10:20 AM
Sources of Carbon and Nitrogen behind Rock Detention Structures in Post-Wildfire Semiarid Montane Watersheds.
James B. Callegary, USGS - U.S. Geological Survey; Laura Norman, USGS; Christopher Eastoe, University of Arizona; Joel Sankey, USGS
10:35 AM
Is Clay-Bound Soil Organic Carbon Vulnerable to Priming?.
Brianna Finley, Northern Arizona University; Craig Rasmussen, University of Arizona; Egbert Schwartz, Northern Arizona University; Paul Dijkstra, Northern Arizona University; Bruce Hungate, Northern Arizona University
10:50 AM
Organic Matter Accumulates in Soil Silt and Clay Fractions Following Decomposition of High Quality Substrates.
Kevin Taylor Cyle, University of Georgia-Athens; Nicholas Hill, University of Georgia-Athens; Dennis W. Hancock, University of Georgia-Athens; Aaron Thompson, University of Georgia-Athens
11:05 AM
11:25 AM
Concluding Remarks
11:30 AM