Poster # 34. Smith, Annemarie^*,1, Boerner, Ralph¹, Brinkman, Jennifer¹, ¹ Ohio State University, Columbus, OH, 43210 Effects of forest ecosystem restoration treatments on soil chemical and biochemical properties.

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Poster # 35. Boerner, Ralph^*,1, Waldrop, Thomas², Brinkman, Jennifer¹, Callaham, Mac², ¹ Ohio State University, Columbus, OH, USA² U.S.D.A. Forest Service Southern Research Station, Clemson, SC, USA Structural and functional restoration effects on soil microbial activity in two contrasting ecosystems.

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Poster # 36. Rajaniemi, Tara^*,1, ¹ Indiana University, Bloomington, IN Root foraging strategies of herbaceous plants: Trade-offs and size-dependence.

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Poster # 37. Stevens, Glen^*,1, Jones, Robert¹, ¹ Virginia Polytechnic Institute and State University, Blacksburg, VA Root proliferation and herbivory in nutrient rich soil patches: A tradeoff for plants?

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Poster # 38. Wells, Christina^*,1, Layne, Desmond¹, ¹ Department of Horticulture, Clemson, SC, 29634 Fine root dynamics of peach (Prunus persica) under two irrigation regimes.

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Poster # 39. Wurzburger, Nina^*,1, Hartshorn, Anthony², Hendrick, Ronald¹, ¹ University of Georgia, Athens, GA² University of California, Santa Barbara, CA Ectomycorrhizal fungal community structure across a bog-forest ecotone in southeast Alaska.

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Poster # 40. Kelley, Alexia¹, Epstein, Howard^*,1, Walker, Donald², ¹ University of Virginia, Charlottesville, VA² Univeristy of Alask Fairbanks, Fairbanks, AK Plant community and ecosystem properties in Arctic frost-boil systems.

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Poster # 41. Zhang, Weijian^{*,1, 2}, Wu, Jiansheng¹, Tu, Cong¹, Hu, Shuijin¹, ¹ North Carolina State University, Raleigh, NC² Nanjing Agricultural University, Nanjing, Jiangshu, China Divergence in microbial community structure and activities in managed ecosystems: Implications for soil carbon dynamic.

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Poster # 42. Costello, Andria^*,1, Fisk, Melany², Otz, Ines¹, Fahey, Tim³, ¹ Syracyuse University, Syracuse, NY, USA² Appalachian State University, Boone, NC, USA³ Cornell University, Ithaca, NY, USA Fungal decomposers of fine roots.

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Poster # 43. Juice, Stephanie¹, Fisk, Melany^*,2, ¹ Cornell University, Ithaca, NY, USA² Appalachian State University, Boone, NC, USA Decomposer fungal community response to calcium additions in a northern hardwood forest, NH.

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Poster # 150. Heckman, Katherine^*,1, Anderson, Wendy¹, Wait, Alexander², ¹ Drury University, Springfield, MO, USA² Southwest Missouri State University, Springfield, MO, USA Ecological contributions of hypolithic cryptobiotic soil crusts in hyperarid ecosystems.

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Poster # 44. Prenger, Joseph¹, DeBusk, William ^{1, 2}, ¹ Soil and Water Science Department, Gainesville, Florida, USA² Ecology and Environment, Inc., Pensacola, Florida, USA Changes in soil microbial activity related to military training and forestry activities.

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Poster # 45. Allison, Victoria^*,1, Miller, Mike¹, Jastrow, Julie¹, Matamala, Roser¹, ¹ Argonne National Laboratory, Argonne, IL, USA Characterization of environmental and edaphic factors affecting soil microbial communities using a tallgrass prairie restoration chronosequence.

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Poster # 46. Klugh, Katrina ^*,1, Cumming, Jonathan¹, ¹ Department of Biology, Morgantown, WV Variation in organic acid exudates among mycorrhizal species colonizing Liriodendron tulipifera L. (yellow-poplar) in the presence of aluminum.

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Poster # 47. Chen, Xin^*,1, Zhi, Guiye¹, Hu, Shuijin², ¹ Zhejiang University, Hangzhou, Zhejiang, China² North Carolina State University, Raleigh, NC Arbuscular mycorrhizal colonization and phosphorus acquisition of plants: Effects of coexisting plant species.

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Poster # 48. Forsgren, Todd^*,1, Palopoli, Michael¹, Lichter, John ¹, ¹ Bowdoin College, Brunswick, Maine, USA Ectomycorrhizal composition and diversity during primary succession on coastal Lake Michigan sand dunes.

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Poster # 49. Kelly, Charlene^*,1, Morton, Joseph¹, Cumming, Jonathan¹, ¹ West Virginia University, Morgantown, WV Intra- and inter-specific variation of infectivity of isolates of several species of mycorrhizal fungi in response to aluminum exposure.

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Poster # 50. Hasselquist, Niles¹, Germino, Matt¹, McGonigle, Terence¹, Smith, William², ¹ Idaho State University, Pocatello, ID² Wake Forest University, Winston-Salem, NC Differences in ectomycorrhizal infection of conifer seedlings across an alpine-treeline ecotone: Relative importance of variation in soil properties and microclimate.

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Poster # 51. Collier, Shawn¹, Sengupta-Goplan, Champa¹, ¹ New Mexico State University, Las Cruces, NM Investigating plant sucrose breakdown in response to arbuscular mycorrhizal fungi.

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Poster # 52. Egerton-Warburton, Louise^{1, 2}, Querejeta, Jose Ignacio², Lindahl, Amy², Allen, Michael², ¹ Chicago Botanic Garden, Glencoe, IL² University of California, Riverside, CA Resource availability and co-existence of mycorrhizal fungi in an oak savanna.

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Poster # 53. Rillig, Matthias^*,1, Lutgen, Emily¹, Rosier, Carl¹, ¹ University of Montana, Missoula, MT Soil aggregation: The role of arbuscular mycorrhizal fungal species.

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Poster # 54. Zimpfer, Jeff^*,1, Wagner, Diane ², Smith, Stanley¹, ¹ Department of Biological Sciences, Las Vegas, NV² Biology and Wildlife Department, Fairbanks, AK Effects of N deposition, increased summer rains and trampling on nitrogen fixing ability of biological crusts in the Mojave Desert.

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Poster # 55. Chen, Janet^*,1, Potts, Daniel¹, ¹ University of Arizona, Tucson, AZ Methane and nitrous oxide fluxes in a semi-arid grassland: The role of species composition and precipitation pulses.

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Poster # 56. Doblas-Miranda, Enrique¹, Sánchez-Piñero, Francisco^*,1, González-Megías, Adela¹, ¹ Dpto. Biología Animal y Ecología, Facultad de Ciencias, Univ. Granada, Granada, Granada, Spain Composition and distribution of belowground macroinvertebrates in a desert region of southern Spain.

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Poster # 57. Selmants, Paul^*,1, Hart, Stephen¹, ¹ Northern Arizona University, Flagstaff, Arizona, USA Nitrogen cycling across an Arizona semiarid woodland soil chronosequence.

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Poster # 58. Piñeiro, Gervasio^*,1, Paruelo, Jose¹, Jobbagy, Esteban¹, Oesterheld, Martin¹, Jackson, Robert², ¹ pineiro@ifeva.edu.ar, Cap. Fed., Buenos Aires, Argentina² Duke University, Durham, North Carolina Long term grazing impacts on carbon and nitrogen soil particle size fractions in South American grasslands.

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Poster # 59. Grandy, A. Stuart ¹, Robertson, G. Philip¹, ¹ W.K. Kellogg Biological Station, Hickory Corners, MI Soil carbon, nitrous oxide and aggregation changes immediately following cultivation of an undisturbed soil profile.

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Poster # 60. Miller, Amy^*,1, Schimel, Joshua¹, Melack, John¹, Sickman, James², ¹ Dept. of Ecology, Evolution, and Marine Biology, University of California, Santa Barbara, CA² California Dept. of Water Resources, Sacramento, CA Response of chaparral soils to episodic rewetting: Microbial controls on N losses.

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Poster # 61. Brewer, Elizabeth ^*,1, Paul, Eldor², Morris, Sherri¹, ¹ Bradley University, Peoria, IL² Colorado State University, Fort Collins, CO Role of nitrogen and calcium in stabilization of soil carbon in forest soils.

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Poster # 62. Su, Bo^*,1, Wan, Shiqiang¹, Belay, Asfaw¹, Hui, Dafeng¹, Luo, Yiqi¹, ¹ University of Oklahoma, Norman, OK, USA Reducing carbon substrate affects nitrogen availability in relation to soil respiration in a tallgrass prairie.

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