Wednesday, August 6, 2008: 1:30 PM-5:00 PM
101 B, Midwest Airlines Center
COS 75 - Nitrogen Cycling II
1:30 PMFixation by adult legume trees linked to soil nitrate in a lowland tropical forest
Alex R. Barron, Princeton University, Lars O. Hedin, Princeton University
1:50 PMPatterns of N uptake in understory plants based on natural abundance and tracer 15N
Linda H. Pardo, USDA Forest Service, Etienne Dambrine, INRA, Bernd Zeller, INRA, Yann Baronnier, INRA, Jean-Luc Dupouey, INRA, Erwin Ulrich, Office National des Forets
2:10 PMSorghum halepense and endophytic N-fixing bacteria: Ecosystem engineers altering soil biogeochemistry
Marnie E. Rout, University of Montana, T.H. Chrzanowski, The University of Texas at Arlington
2:30 PMNitrogen dynamics in urban grasslands and forests
Peter M. Groffman, Cary Institute of Ecosystem Studies, Richard V. Pouyat, USDA Forest Service, Candiss O. Williams, Purdue University, Lawrence E. Band, University of North Carolina
2:50 PMLeaf uptake of gaseous nitrogen dioxide: The influence of root nitrogen sources, concentrations, and enzyme expression
Dena M. Vallano, Cornell University, Jed P. Sparks, Cornell University
3:10 PMBreak
3:20 PMCarbon and sulfide as controls on nitrogen cycling in freshwater sediments
Amy J. Burgin, Cary Institute of Ecosystem Studies, Stephen K. Hamilton, Michigan State University
3:40 PMNitrous oxide production from bacteria and fungi in a semi-arid grassland soil from central New Mexico
Matthew R. Opdyke, Point Park University, Peggy H. Ostrom, Michigan State University, Nathaniel E. Ostrom, Michigan State University, Robert L. Sinsabaugh, University of New Mexico, Chelsea L. Crenshaw, Utah State University
4:00 PMControls of anthropogenic nitrogen input and export for catchments in the Central Valley, California, USA
Daniel J. Sobota, Washington State University - Vancouver, John A. Harrison, Washington State University - Vancouver
4:20 PMSeasonal variation in nitrogen retention processes in a coupled terrestrial-aquatic ecosystem: A tracer experiment
Christine L. Goodale, Cornell University, Steve A. Thomas, University of Nebraska-Lincoln, Jed P. Sparks, Cornell University, Guinevere Fredriksen, Cornell University, Carmody K. McCalley, Cornell University
4:40 PMThe role of microbes in interspecific plant competition for nitrogen
Stephanie Yelenik, University of California, Santa Barbara, Benjamin Colman, University of California, Santa Barbara, Janneke Hille Ris Lambers, University of Washington, Jonathan M. Levine, University of California, Santa Barbara

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See more of The 93rd ESA Annual Meeting (August 3 -- August 8, 2008)