Session: Nitrogen Cycling II (93rd ESA Annual Meeting (August 3 -- August 8, 2008))

1:30 PM

COS 75-1

Fixation 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 PM

COS 75-2

Patterns 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 PM

COS 75-3

Sorghum 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 PM

COS 75-4

Nitrogen dynamics in urban grasslands and forests
Peter M. Groffman, Cary Institute of Ecosystem Studies; Richard Pouyat, Chesapeake Bay Career Consulting; Candiss O. Williams, Purdue University; Lawrence E. Band, University of North Carolina

2:50 PM

COS 75-5

Leaf uptake of gaseous nitrogen dioxide: The influence of root nitrogen sources, concentrations, and enzyme expression
Dena M. Vallano, University of California Santa Cruz; Jed P. Sparks, Cornell University

3:10 PM

COS 75-

Break

3:20 PM

COS 75-6

Carbon and sulfide as controls on nitrogen cycling in freshwater sediments
Amy J. Burgin, University of Nebraska - Lincoln; Stephen K. Hamilton, Michigan State University

3:40 PM

COS 75-7

Nitrous 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, University of New Mexico

4:00 PM

COS 75-8

Controls of anthropogenic nitrogen input and export for catchments in the Central Valley, California, USA
Daniel J. Sobota, National Research Council Postdoctoral Fellow; John A. Harrison, Washington State University Vancouver

4:20 PM

COS 75-9

Seasonal 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 PM

COS 75-10

The 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, ETH Zurich

COS 75 - Nitrogen Cycling II