[UNKNOWN: PRESTIME] Rice, Steven^*,1, Westerman, Bryant¹, Federici, Robert¹, ¹ Department of Biological Sciences, Union College, Schenectady, NY. Impacts of the nitrogen-fixing black locust on nitrogen-cycling in a pine-oak ecosystem .

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[UNKNOWN: PRESTIME] BIGELOW, SETH^*,1,3, EWEL, JOHN^2,3, ¹ Institute of Ecosystem Studies, Millbrook, NY³ University of Florida Department of Botany, Gainesville, FL² USDA-FS Institute of Pacific Islands Forestry, Honolulu, HI. Nutrient retention in tropical plantations: costs and benefits of enhanced plant life-form diversity.

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[UNKNOWN: PRESTIME] MADRITCH, MICHAEL^*,1, HUNTER, MARK¹, ¹ University of Georgia, Athens, GA. Interactive effects of intraspecific litter diversity and nitrogen deposition on nutrient cycling.

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[UNKNOWN: PRESTIME] Reich, Alexandra^*,1, Ewel, John², Nadkarni, Nalini³, Evans, R. Dave⁴, Dawson, Todd⁵, ¹ La Selva Biological Station, Costa Rica² Institute of Pacific Islands Forestry, Honolulu, Hawaii³ The Evergreen State College, Olympia, Washington⁴ University of California, Berkeley⁵ University of Arkansas, Fayetteville. Nitrogen sources and functional roles shift with plant size in tropical bromeliads.

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[UNKNOWN: PRESTIME] Schweitzer, Jennifer^*,1,2, Hart, Stephen^1,2, Bailey, Joseph^1,2, Woolbright, Scott^1,2, Whitham, Thomas^1,2, ¹ Northern Arizona University, Flagstaff, AZ² Merriam-Powell Center for Environmental Research, Flagstaff, AZ. A genetic component to ecosystem-level processes: genetic variation in condensed tannins predicts net nitrogen mineralization.

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[UNKNOWN: PRESTIME] RICH, JEREMY^*,1, MYROLD, DAVID¹, Bottomley, P², Cromack, K³, ¹ Dept. of Crop and Soil Science, Corvallis, OR² Department of Microbiology³ Department of Forest Science. Genetic diversity and functioning of denitrifying bacteria in soils.

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[UNKNOWN: PRESTIME] . Break.

[UNKNOWN: PRESTIME] Gilbert, Janice^*,1, Frey, Serita¹, Bouchard, Virginie¹, ¹ Ohio State University, Columbus, Ohio. Effects of macrophyte diversity on denitrification in a mesocosm experiment.

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[UNKNOWN: PRESTIME] GRAYSTON, SUSAN^*,1, DAWSON, LORNA¹, MURRAY, PHILIP², COOK, ROGER³, CURRIE, AMANDA⁴, GANGE, ALAN⁴, TREONIS, AMY^1,5, ¹ The Macaulay Institute, Aberdeen, U.K.² Institute of Grassland and Environmental Research, Okehampton, U.K.³ Institute of Grassland and Environmental Research, Aberystwyth, U.K.⁴ Royal Holloway, University of London, Egham, U.K.⁵ Creighton University, Omaha, Nebraska. Root herbivore:microbe interactions in upland grasslands.

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[UNKNOWN: PRESTIME] Tuininga, Amy^*,1, Dighton, John², ¹ Fordham University, Armonk, NY² Rutgers Pinelands Field Station, New Lisbon, NY. Temporal relationships between ectomycorrhizal diversity and functional responses to disturbance by fire.

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[UNKNOWN: PRESTIME] Aldrich-Wolfe, Laura^*,1, ¹ Cornell University, Ithaca, NY. Species diversity and community composition of arbuscular mycorrhizal fungi in tropical forest fragments and adjacent pastures.

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[UNKNOWN: PRESTIME] Daufresne, Tanguy^*,1, Hedin, Lars¹, ¹ Department of Ecology and Evolutionary Biology, Princeton, New Jersey. Competition theory modified by stoichiometric ecosystem properties.

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[UNKNOWN: PRESTIME] Rixen, Christian^*,1, Schmid, Bernhard¹, ¹ University of Zurich, Zurich, Switzerland. Plant diversity x snow chemistry in an experimental sub-alpine grassland community.

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