Oral Session 57: Biogeochemistry IV: Nitrogen Cycling.
Presiding: M Mack and J Baron
Wednesday, August 4, 8:00 AM to 11:30 AM, Meeting Room A 107.
8:00 AM Craine, Joseph*,1, Sugita, Shinya1, 1 University of MInnesota, Saint Paul, MN, United States Reconstruction of terrestrial N cycling with natural abundance 15N in tree rings.
8:20 AM Pardo, Linda*,1, Templer, Pamela2, Goodale, Christine3, Groffman, Peter4, Duke, Sara5, 1 USDA Forest Service, Burlington, VT2 University of California, Berkeley, CA3 Cornell University, Ithaca, NY4 Institute of Ecosystems Studies, Millbrook, NY5 USDA Agricultural Research Service, College Station, TX Regional assessment of N saturation using foliar 15N.
8:40 AM Hungate, Bruce*,1, Johnson, Dale2, Megonigal, J. 3, Drake, Bert3, Hinkle, C4, 1 Dept. of Biological Sciences and Merriam-Powell Center for Environmental Research, Flagstaff, AZ, USA2 Department of Biology, Reno, NV, USA3 Smithsonian Environmental Research Center, Edgewater, MD, 210384 Dynamac Corporation, Kennedy Space Center, FL, USA Nitrogen cycling in a scrub-oak woodland during eight years of carbon dioxide enrichment.
9:00 AM Lovett, Gary*,1, Fitzhugh, Ross2, Christenson, Lynn1, 3, Weathers, Kathleen1, Arthur, Mary4, Templer, Pamela5, 1 Institute of Ecosystem Studies, Millbrook, NY2 University of Illinois, Urbana, IL3 SUNY College of Environmental Science and Forestry, Syracuse, NY4 University of Kentucky, Lexington, KY5 University of California, Berkeley, CA Oak trees, nitrification and nitrate leaching in forests of the Catskill Mountains, NY.
9:15 AM Finzi, Adrien*,1, Berthring, Sean1, 1 Boston University, Boston, MA, 02215 Organic nitrogen cycling in temperate forests of southern New England.
9:40 AM Break.
9:50 AM Reed, Sasha*,1, 2, Townsend, Alan1, 2, Cleveland, Cory2, 1 University of Colorado, Boulder, CO2 Institute for Arctic and Alpine Research (INSTAAR), Boulder, CO Nutrient controls of nitrogen fixation in a tropical rainforest.
10:10 AM Ostertag, Rebecca*,1, 1 University of Hawaii at Hilo, Hilo, HI Fertilization and foliar nitrogen and phosphorus relationships in two Hawaiian montane wet forests.
10:30 AM Tomaszewski, Timothy *,1, Sievering, Herman 1, 2, 1 University of Colorado, Boulder, CO, USA2 University of Colorado, Denver, CO, USA Non-photochemical quenching (NPQ) of first-year spruce foliage responds to nitrogen in simulated wet deposition at a Colorado subalpine forest.
10:50 AM Silver, Whendee*,1, Thompson, Andrew1, Bradbury, Damon1, Chapin, F. Stuart2, Ewel, John3, Firestone, Mary1, 1 University of California, Berkeley, CA2 University of Alaska, Fairbanks, Alaska3 USDA Forest Service, Honolulu, HI A latitudinal gradient in nitrogen retention and loss: The role of dissimilatory nitrate reduction to ammonium.
11:10 AM Houlton, Benjamin1, Sigman, Daniel1, Hedin, Lars1, 1 Princeton University, Princeton, New Jersey, USA 15N/14N as a proxy for gaseous nitrogen losses across a forest rainfall gradient.
All materials copyright The Ecological Society of America (ESA), and may not be used without written permission.