Thursday, August 9, 2007: 1:30 PM-5:00 PM
Almaden Blrm I, San Jose Hilton
COS 132 - Nitrogen cycling and enrichment in forests
1:30 PMCOS 132-1Immobilization of 15N-ammonium and nitrate in forest soils
Weixing Zhu, State University of New York - Binghamton, Wenwen Wang, State University of New York - Binghamton
1:50 PMCOS 132-2Fluxes and fates of different forms of N in surface soils of wet tropical forests varying in nutrient status and substrate age in Hawaii
Kathleen A. Lohse, University of Arizona
2:10 PMCOS 132-3Impact of chronic nitrogen addition on soil trace gas fluxes in a tropical lowland rainforest
Birgit Koehler, University of Goettingen, Marife D. Corre, University of Goettingen, Edzo Veldkamp, University of Goettingen
2:30 PMCOS 132-4Effects of nitrogen excess through rainfalls on growth and competition status of woody seedlings in Mt Tanzawa, near Tokyo, and mitigation of the effects using wood-chips
Akiko Sakai, Yokohama National University, Reiji Fujimaki, Yokohama National University, Nobuhiro Kaneko, Yokohama National University
2:50 PMCOS 132-6Freeze-thaw cycles, nitrogen dynamics, and primary production in a northern temperate ecosystem
Germaine E. Joseph, University of Western Ontario, Hugh A. L. Henry, University of Western Ontario
3:10 PM Break
3:20 PMCOS 132-7Changes in nitrogen cycling and retention processes in soils under spruce forests along a nitrogen enrichment gradient in Germany
Marife D. Corre, University of Goettingen, Edzo Veldkamp, University of Goettingen, Rainer Brumme, University of Goettingen
3:40 PMCOS 132-8Fire severity, nitrogen loss, and plant nitrogen availability in boreal black spruce forests
Michelle C. Mack, University of Florida, Leslie Boby, University of Florida, Jill F. Johnstone, University of Saskatchewan, Teresa N. Hollingsworth, USDA Forest Service, Edward A. G. Schuur, University of Florida, F. Stuart Chapin, University of Alaska
4:00 PMCOS 132-9Plant species diversity modulates the effect of nitrogen deposition on litter decomposition
Lucia Vivanco, University of Buenos Aires and IFEVA CONICET, Amy T Austin, University of Buenos Aires and IFEVA CONICET
4:20 PMCOS 132-10Nitrogen loading affects free amino acid concentrations differently than inorganic N in temperate forest soils along a gradient of nitrogen deposition
Harbans L. Sehtiya, University of Illinois at Chicago, John Lussenhop, University of Illinois at Chicago, Hormoz BassiriRad, University of Illinois at Chicago

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