COS 111 - Nitrogen cycling across systems

Thursday, August 9, 2007: 8:00 AM-11:30 AM
N, San Jose McEnery Convention Center
8:00 AM
 Stable 15N abundances record the imprint of oaks on nitrogen cycling in California grassland-savanna
Steven Perakis, US Geological Survey; Chev H. Kellogg, University of Oklahoma
8:20 AM
 Stoichiometry and co-limitation in a South African grassland
Joseph M. Craine, Kansas State University; Carl Morrow, University of Cape Town; Michelle Mack, University of Florida; William Stock, Edith Cowan University
8:40 AM
 Carbon and nitrogen dynamics in southern African savannas
Lixin Wang, University of Virginia; Paolo D'Odorico, University of Virginia; Stefano Manzoni, Swedish University of Agricultural Sciences; Amilcare Porporato, Duke University; Stephen Macko, University of Virginia
9:00 AM
 Temporal variability of 15N enrichment of the soil microbial biomass along a semiarid substrate age gradient
Jeffrey S. Coyle, Northern Arizona University; Paul C. Selmants, University of Hawaii at Manoa; Paul Dijkstra, Northern Arizona University; Egbert Schwartz, Northern Arizona University; Stephen C. Hart, University of California, Merced; Bruce A. Hungate, Northern Arizona University
9:20 AM
 Possible fates for nitrate in grassy vs. xeriscaped stormwater retention basins
Elisabeth K. Larson, Arizona State University; Nancy Grimm, Arizona State University
9:40 AM
9:50 AM
 Low N losses may drive pine invasion in central Great Plains
Ramesh Laungani, Doane University; Jean Knops, University of Nebraska-Lincoln
10:10 AM
 Modeling 150 years of anthrpogenic nitrogen loading to Narragansett Bay
Matthew A. Vadeboncoeur, University of New Hampshire; Steven P. Hamburg, Environmental Defense Fund
10:30 AM
 The effects of atmospheric nitrogen deposition on nitrate retention and loss in urban wetlands
Emilie K. Stander, US Agency for International Development; Joan G. Ehrenfeld, Rutgers University
10:50 AM
 Soil aggregate-associated nitrogen dynamics and microbial community composition in three different tillage systems
Subathra Muruganandam, North Carolina State University; Daniel. W Israel, North Carolina State University; Wayne Robarge, North Carolina State University
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