Poster # 70. Zorn-Arnold, Barbara^*,1, Howe, Henry¹, Brown, Joel¹, ¹ University of Illinois-Chicago, Chicago, Illinois Impact of vole herbivory on Desmanthus illinoensis under two different planting densities and seasons.

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Poster # 71. Doak, Pat^*,1, ¹ Institute of Arctic Biology, Fairbanks, AK Patterns of spruce bark beetle (Dendroctonus rufipennis) spread within white spruce (Picea glauca) stands.

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Poster # 72. Maas, Martha^*,1, Fowler, Norma¹, ¹ University of Texas, Austin Fungal infection in a native bunchgrass: effects on plant palatability.

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Poster # 73. Behmer, Spencer^*,1, Murugan, Kadarkarai¹, Warner, Kathryn¹, Simpson, Stephen¹, Raubenheimer, David¹, ¹ University of Oxford, Oxford, UK Using geometry to explore nutrient-allelochemical interactions: a case-study using locusts.

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Poster # 74. Langellotto, Gail^*,1,2, Denno, Robert¹, ¹ University of Maryland, College Park, MD² University of California-Davis, Davis, CA Meta-analytical synthesis of the response of invertebrate natural enemies to complex-structured habitats .

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Poster # 75. Eatough Jones, Michele^*,1, Paine, Timothy¹, ¹ University of California, Riverside., Riverside, CA Changes in insect herbivore communities along an ozone and nitrogen deposition gradient in the San Bernardino Mountains.

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Poster # 76. Kula, Abigail^*,1, Hartnett, David¹, Wilson, Gail¹, ¹ Kansas State University, Manhattan, KS Effects of mycorrhizal symbiosis on plant-grasshopper interactions in prairie microcosms.

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Poster # 77. Sevillano, Lucero^*,1, Dirzo, Rodolfo¹, Mariano, Néstor^*,1, ¹ Instituto de Ecología, Universidad Nacional Autónoma de México, Ap. Post. 70275, México, D.F., MEXICO Direct and indirect effects of herbivory on fitness of two sympatric species of Costus.

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Poster # 78. Yarnes, Christopher^*,1, Boecklen, William¹, ¹ New Mexico State University, Las Cruces, NM Heterogeneity in trophic systems: consequences of variable leaf quality along an elevational gradient .

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Poster # 79. Ben-Natan, Gil^*,1, ¹ Ben-Gurion University, Beer-Sheva, Israel Three ways interaction: granivores, soil crust, and annual plants.

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