[UNKNOWN: PRESTIME] KRUEGER-MANGOLD, JANE^*,1, SHELEY, ROGER¹, SVEJCAR, TONY², ENGEL, RICHARD¹, JACOBSEN, JEFF¹, ¹ Montana State University, Bozeman, MT² Eastern Oregon Agricultural Research Center, Burns, OR. Identification of the primary limiting resource within an Idaho fescue/bluebunch wheatgrass plant association as a basis for mechanistic competition modeling.

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[UNKNOWN: PRESTIME] LUNDHOLM, JEREMY^*,1, LARSON, DOUG¹, ¹ University of Guelph, Guelph, Ontario, Canada. Effects of temporal and spatial heterogeneity in moisture supply on plant community diversity.

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[UNKNOWN: PRESTIME] de MAZANCOURT, Claire^*,1, CRAWLEY, Michael¹, ¹ Imperial College, SILWOOD PARK, Berkshire, UK. Community stability in the mesotrophic grasslands of Park Grass.

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[UNKNOWN: PRESTIME] MacDougall, Andrew^*,1, Turkington, Roy¹, ¹ University of British Columbia, Vancouver, British Columbia, Canada. Contingent competitive relationships in a heavily invaded oak grassland.

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[UNKNOWN: PRESTIME] Sears, Anna^*,1, Chesson, Peter¹, ¹ University of California, Davis, Davis, CA. Quantifying the contribution of coexistence processes in the Arizona desert.

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[UNKNOWN: PRESTIME] . Break.

[UNKNOWN: PRESTIME] O'BRIEN, ERIN^*,1, BROWN, JOEL¹, ¹ Dept. of Biological Sciences, Chicago, IL. A Tragedy of the Commons: Frequency- and density-dependent competition in two prairie annuals.

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[UNKNOWN: PRESTIME] Laird, Robert^*,1, Aarssen, Lonnie¹, ¹ Department of Biology, Queen's University, Kingston, Ontario, Canada. Tragedy of the commons in intraspecific plant competition.

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[UNKNOWN: PRESTIME] Wildova, Radka^*,1, Herben, Tomas¹, ¹ Institute of Botany, Academy of Sciences of the Czech Republic, Pruhonice, Czech Republic. Architectural constraints and resource translocation affects competitive ability in clonal plants.

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[UNKNOWN: PRESTIME] Hershock, Chad^*,1, Goldberg, Deborah¹, ¹ Ecology and Evolutionary Biology, Ann Arbor, MI. Relationships among clonal architecture, colonization ability, competitive ability, and plant species distributions in calcareous fens.

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