[UNKNOWN: PRESTIME] PHOENIX, GARETH^*,1, BOOTH, ROSEMARY¹, LEAKE, JONATHAN¹, LEE, JOHN¹, READ, DAVID¹, GRIME, PHILLIP¹, ¹ University of Sheffield, Sheffield, UK.. Nitrogen dynamics in semi-natural acidic and calcareous grasslands under ambient and enhanced N deposition.

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[UNKNOWN: PRESTIME] GILLIAM, FRANK^*,1, LYTTLE, NIKKI¹, THOMAS, ASHLEY¹, ADAMS, MARY BETH², ¹ MARSHALL UNIVERSITY, HUNTINGTON, WV² USDA FOREST SERVICE, PARSONS, WV. Spatial variability in nitrogen-saturated soils: interactions of cation mobility and substrate quality with N dynamics.

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[UNKNOWN: PRESTIME] Perakis, Steven^*,1,2, Bullen, Thomas³, Maguire, Doug², Cromack, Kermit², Waring, Richard², ¹ USGS Forest and Rangeland Ecosystem Science Center, Corvallis, OR² Oregon State University, Corvallis, OR³ USGS Water Resources Division, Menlo Park, CA. Forest harvest, N saturation, and potential base cation depletion in coastal Oregon forests .

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[UNKNOWN: PRESTIME] Pett-Ridge, Jennifer^*,1, Silver, Whendee¹, Firestone, Mary¹, ¹ University of California at Berkeley, Berkeley, CA. Redox and the nitrogen cycle: how oxic/anoxic fluctuation affects nitrogen cycling in a wet tropical soil.

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[UNKNOWN: PRESTIME] WEATHERS, KATHLEEN^*,1, LOVETT, GARY¹, ARTHUR, MARY², SIMKIN, SAMUEL¹, ¹ INSTITUTE OF ECOSYSTEM STUDIES, MILLBROOK, NY² UNIVERSITY OF KENTUCKY, LEXINGTON, KY. Watershed controls on streamwater nitrate concentrations, Catskill Mountains, NY.

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[UNKNOWN: PRESTIME] McClain, Michael^*,1, Brandes, Jay², Llerena, Carlos³, Reynel, Carlos³, ¹ Department of Environmental Studies, Miami, FL² Marine Science Institute, Port Aransas, TX³ Facultad de Ciencias Forestales, Lima, Peru. Nitrogen stocks and fluxes in riparian and upland montane forest of the Andean Amazon Basin.

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[UNKNOWN: PRESTIME] CHAMBERS, CHRIS^*,1, MARSHALL, JOHN¹, DANEHY, BOB², ¹ University of Idaho, Moscow, ID² Boise Cascade Corporation, Boise, ID. Background ¹⁵N variation in riparian vegetation in the northern Rocky Mountains.

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[UNKNOWN: PRESTIME] Compton, Jana^*,1, Hooker, Toby², Perakis, Steven³, McKane, Robert¹, ¹ US EPA, Western Ecology Division, Corvallis, OR² Utah State University, Logan, UT³ USGS, Forest Range and Ecosystem Science Center, Corvallis, OR. Nitrogen distribution and ¹⁵N in a 115 year chronosequence of old-field white pine.

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[UNKNOWN: PRESTIME] Knops, Johhannes^*,1, Wedin, David², Bradley, Kate¹, ¹ School of Biological Sciences, Lincoln, NE² School of Natural Resource Sciences, Lincoln, NE. Positive and negative feedbacks of plant species on ecosystem nitrogen cycling.

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[UNKNOWN: PRESTIME] D'Antonio, Carla^*,1,2, Corbin, Jeff², ¹ USDA-ARS, REno, Nevada² University of CA, Dept. of Integrative Biology, Berkeley, CA. Species compositional effects on nitrogen partitioning and recovery in a coastal prairie ecosystem.

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[UNKNOWN: PRESTIME] Corbin, Jeffrey^*,1, D'Antonio, Carla^1,2, Bouchier, Todd¹, ¹ University of California, Berkeley, Berkeley² USDA-ARS, Reno, Nevada. Predicting the effects of community composition on nitrogen dynamics in a coastal California grassland.

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