OOS 31 - Measuring and Modeling Roots, the Rhizosphere, and Microbial Processes Belowground

Wednesday, August 10, 2011: 1:30 PM-5:00 PM
15, Austin Convention Center
Organizer: M. Luke McCormack
Co-organizer: David M. Eissenstat
Moderator: Richard Norby
Effective earth stewardship requires accurate descriptive and predictive capabilities from ecosystem and landscape scale models. Today, our most efficient road to improve these modeling efforts is to increase collaboration between the often separate communities of field ecology and ecological modeling. This is particularly true for the belowground portion or “hidden half” of terrestrial ecosystems. Here, modeling efforts have been hampered by a lack of empirical data and few broad patterns to describe key processes. Still, recent advances are shedding light on what previously were poorly understood or entirely unmeasured facets of belowground ecology. This organized session seeks to expand dialogue between empiricists and ecological modelers and more tightly couple empirical observations with model descriptions of belowground processes. To do this the session focuses on three key objectives: 1) expose modelers to relevant, cutting-edge belowground ecology providing new evidence or mechanisms that could be incorporated into models 2) expose empiricists to advanced models so that they may better understand how field observations are used in models and 3) allow modelers and field ecologists to jointly identify what information is critical for the next generation of model improvements allowing for more directed research efforts. Furthermore, we intend for the presentations to encourage discussion between speakers and attendees during and following the session. **Travel support for international speakers and early career scientists was given by the New Phytologist Trust Innovation Grants program and by a Long Term Planning Grant from the Physiological Ecology Section of ESA.
1:30 PM
Radiocarbon evidence for the mining of organic nitrogen from soil by mycorrhizal fungi
Erik A. Hobbie, University of New Hampshire; Andy Ouimette, University of New Hampshire; E.A.G. (Ted) Schuur, University of Florida; James M. Trappe, Oregon State University; Katriina Bendiksen, University of Oslo; Esteri Ohenoja, University of Oulu
2:10 PM
Soil organic N cycling under elevated CO2 and O3: Relationships among functional gene abundance, enzyme activity, and substrate concentration
Kirsten S. Hofmockel, Pacific Northwest National Laboratory; Donald R. Zak, University of Michigan
2:30 PM
CANCELLED - Using global data to test microbial activity in litter decomposition models
E. Carol Adair, University of Vermont; W. J. Parton, Colorado State University
2:50 PM
Fungi decrease the sequestration of root-derived C under elevated CO2
Richard P. Phillips, Indiana University; Adrien C. Finzi, Boston University; Ina C. Meier, Indiana University; Emily S. Bernhardt, Duke University
3:10 PM
3:20 PM
Global modeling of plant N uptake and C allocation
Joshua B. Fisher, California Institute of Technology; Stephen Sitch, University of Leeds; Yadvinder Malhi, University of Oxford; Rosie A. Fisher, National Center for Atmospheric Research; Chris Huntingford, Centre for Ecology and Hydrology; Su-Yin Tan, University of Waterloo
3:40 PM
Linking root traits with ecosystem processes 
Dali Guo, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences
4:00 PM
The consequences of deeper rooting distributions under elevated [CO2]: Testing a conceptual model
Colleen M. Iversen, Oak Ridge National Laboratory; Jason K. Keller, Chapman University; Charles T. Garten Jr., Oak Ridge National Laboratory
4:20 PM
Patterns of fine root turnover in temperate trees
M. Luke McCormack, University of Minnesota; Thomas S. Adams, The Pennsylvania State University; David Eissenstat, The Pennsylvania State University
4:40 PM
Roots are weapons: Game theory of fine-root investment from a whole-plant perspective; theoretical predictions and empirical challenges
Ray Dybzinski, Princeton University; Caroline E. Farrior, Princeton University; Stephen W. Pacala, Princeton University
See more of: Organized Oral Session
Copyright © . All rights reserved.
Banner photo by Flickr user greg westfall.