[UNKNOWN: PRESTIME] REITHEL, JENNIFER^*,1,2, ¹ University of California, Irvine, CA² Rocky Mountain Biological Laboratory, Crested Butte, CO. Host plant mediation of a conditional mutualism.

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[UNKNOWN: PRESTIME] van Ommeren, Ron^*,1,2, Whitham, Thomas¹, ¹ Northern Arizona University, Flagstaff, Arizona² Senna Environmental Services, Phoenix, Arizona. Conditional interactions between juniper and mistletoe mediated by shared avian frugivores: parasitism to potential mutualism.

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[UNKNOWN: PRESTIME] Weeks, Jennifer^*,1, ¹ University Of Arizona, Tucson, AZ. Conditionality in ant protection mutualisms: the role of resource availability.

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[UNKNOWN: PRESTIME] Bronstein, Judith^*,1, Richardson, Leif², ¹ Dept. of Ecology and Evolutionary Biology, Tucson, AZ² Vermont Nongame and Natural Heritage Program, Waterbury, VT, 05671. The pollinator-robber spectrum.

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[UNKNOWN: PRESTIME] HOLLAND, JULIAN^*,1, ¹ University of Arizona, Tucson, AZ. Demographic consequences of benefits, costs, and resource limitation to plants in a pollinating seed-consumer mutualism.

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[UNKNOWN: PRESTIME] . Break.

[UNKNOWN: PRESTIME] SCHOWALTER, RACHEL^*,1, HORVATH, SABINE¹, COBB, NEIL¹, ¹ Northern Arizona University, Flagstaff, AZ. Nurse shrub nutrient enrichment facilitates pinyon pine development differentially across an edaphic stress gradient.

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[UNKNOWN: PRESTIME] Kyllo, Damond^*,1, ¹ University Missouri-St Louis, St Louis, MO. Effects of mycorrhizae and light on plant performance and community structure of understory shrubs.

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[UNKNOWN: PRESTIME] Gehring, Catherine^*,1, Wolf, Julie¹, Theimer, Tad¹, ¹ Northern Arizona University, Flagstaff, Arizona. Terrestrial vertebrates promote arbuscular mycorrhizal fungal diversity and inoculum potential in a rainforest soil.

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[UNKNOWN: PRESTIME] Umbanhowar, James^*,1, McCann, Kevin¹, ¹ Dept. of Biology, Montreal, QC, Canada. Nutrients and light control the population dynamics of plant-mycorrhizal symbiosis.

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[UNKNOWN: PRESTIME] Kummel, Miroslav^*,1, ¹ mkummel@umich.edu, Ann Arbor, MI. Plant choice in ectomycorrhizae: Over and under-representation of Cenococcum on balsam fir along a light-gradient.

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