Poster # 97. O'Neill, Katherine^*,1, Godwin, Harry¹, Halvorson, Jonathan¹, ¹ Appalachian Farming Systems Research Center, Beaver, WV, How do soil faunal diversity and decomposition change at grassland-forest margins? Effects of vegetation cover, management, and seasonality.

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Poster # 98. Madsen, Rodney¹, Xu, Liukang¹, McDermitt, Dayle^*,1, Burba, George¹, Garcia, Rick¹, Demetriades-Shaw, Tanvir¹, Scoby, David², Arkebauer, Timothy², ¹ LI-COR Biosciences, Lincoln, NE² University of Nebraska, Lincoln, NE, Addressing spatial and temporal variability of soil CO₂ flux using an automated 16-chamber multiplexed system.

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Poster # 100. Tomlinson, Peter^*,1, McClymont, Adam¹, Savin, Mary¹, ¹ University of Arkansas, Fayetteville, AR, Nitrogen cycling as affected by organic amendments to grassland soil.

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Poster # 101. Haddix, Michelle^*,1, Steinweg, Jessica¹, Conant, Richard¹, Paul, Eldor¹, ¹ Colorado State University, Fort Collins, CO, Temperature sensitivity of soil organic matter fractions.

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Poster # 102. Dermody, Orla^*,1, Norby, Richard², Engel, Elizabeth^*,1, Weltzin, Jake¹, ¹ University of Tennessee, Knoxville, TN² Oak Ridge National Lab, Oak Ridge, TN, How do changes in [CO₂], temperature, and precipitation affect the spatial and temporal dynamics of soil moisture in an old field ecosystem?

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Poster # 103. Huang, Ching-Yu^*,1, Hendrix, Paul¹, ¹ University of Georgia, Athens, GA, A simulation model of earthworm invasions: the impacts on soil nutrient dynamics.

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Poster # 104. Halvorson, Jonathan^*,1, Gonzalez, Javier ¹, Smith, Jeffrey², ¹ USDA-ARS, Appalachian Farming Systems Research Center, Beaver, WV, USA² USDA-ARS Land Management and Water Conservation Research Unit, Pullman, WA, Tannic acid affects extraction of water soluble carbon and nitrogen from soil, and carbon and nitrogen composition of Bradford Reactive Protein.

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Poster # 105. Aubrey, Doug^*,1, Coleman, Mark¹, ¹ USDA Forest Service, New Ellenton, SC, USA, Does seasonality control the Q₁₀ of soil respiration.

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Poster # 106. Smith, Candice^*,1, Randolph, JC¹, Bever, James¹, ¹ Indiana University, Bloomington, IN, Nitrogen, phosphorus, and carbon additions to sugar maple and white oak: effects on soil respiration, fine root biomass and mycorrhizal colonization.

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Poster # 107. Malcolm, Glenna^{*,1, 2}, Lopez-Gutierrez, Juan², Koide, Roger^{1, 2}, Eissenstat, David^{1, 2}, ¹ IGDP in Ecology, The Pennsylvania State University, University Park, PA² Department of Horticulture, The Pennsylvania State University, University Park, PA, Temperature acclimation of respiration by soil microorganisms.

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Poster # 108. Milligan, Heather^*,1, Magrini, Kim², Conant, Richard³, Plante, Alain⁴, Drijber, Rhea⁵, Morris, Sherri¹, Brewer, Elizabeth⁶, Paul, Eldor³, ¹ Bradley University, Peoria, IL² National Energy Laboratory, Golden, CO³ Colorado State University, Fort Collins, CO⁴ Villanova University, Villanova, PA⁵ University of Nebraska, Lincoln, Lincoln, NE⁶ Oregon State University, Corvallis, OR, Relating the chemical structure of soil organic components to calcium content and temperature controls on their dynamics.

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Poster # 109. Golubski, Antonio^*,1, Lussenhop, John, ¹ University of Illinois at Chicago, Chicago, IL, Antagonistic effects of dual plant hosts for one root-hugger of a mycorrhizal fungus.

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Poster # 110. Damm, Mary^*,1, Bever, James¹, ¹ Indiana University, Bloomington, IN, Reduced dependence on mycorrhizal fungi by invasive plant species.

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Poster # 111. Stottlemyer, Aaron^*,1, Layton, Richard^*,1, Wang, Geoff¹, Wells, Christina^*,2, Waldrop, Thomas³, Callaham, Mac⁴, ¹ Dept. of Forestry and Natural Resources, Clemson University, Clemson, SC² Deptartment of Horticulture, Clemson University, Clemson, SC³ USDA Forest Service, Southern Research Station, Clemson, SC⁴ USDA Forest Service, Southern Research Station, Athens, GA, Growing nonmycorrhizal loblolly pine (Pinus taeda L.) seedlings in a standard greenhouse setting.

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Poster # 112. Garcia, Maria ^*,1, Ovasapyan, Tatevik¹, Finzi, Adrien ², Treseder, Kathleen¹, ¹ University of California, Irvine, Irvine, CA² Duke University, Durham, NC, Mycorrhizal dynamics under CO₂ and nitrogen enrichment.

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Poster # 113. Coyle, Jeffrey^*,1, Dijkstra, Paul¹, Schwartz, Egbert ¹, Hart, Stephen¹, Selmants, Paul¹, Hungate, Bruce¹, ¹ Northern Arizona University, Flagstaff, AZ, ¹⁵N natural abundance of the microbial biomass along a semi-arid soil age gradient.

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Poster # 114. Swedo, Barbara^*,1, Glinka, Clare¹, Rollo, Dave¹, Reynolds, Heather¹, ¹ Indiana University, Bloomington, Bloomington, IN, Microbial community structure under invasive exotic versus native forest ground cover.

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Poster # 115. Clark, Jeb^*,1, Campbell, James¹, Zak, John¹, ¹ Texas Tech University, Lubbock, TX, Soil eubacterial diversity along an elevation and vegetation gradient in the Chihuahuan Desert, Big Bend National Park: analysis using culture-dependent and culture-independent techniques.

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Poster # 116. Campbell, James^*,1, Clark, Jeb¹, Zak, John¹, ¹ Texas Tech University, Lubbock, TX, Microbial diversity of soils along a Chihuahuan Desert elevational gradient.

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Poster # 117. Graham, Carrie^*,1, Khetmalas, Madhukar², Zak, John¹, ¹ Texas Tech University, Lubbock, TX² University of Central Oklahoma, Edmond, OK, Influence of soil type on bacterial diversity from cotton rhizosphere and bulk soils of west Texas.

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Poster # 118. Ahn, Changwoo^*,, Gillevet, Patrick¹, Sikaroodi, Masoumeh², ¹ George Mason University, Fairfax, VA² , Assessing microbial communities in treatment wetlands as affected by phosphorus loading - a microcosm experiment.

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Poster # 119. Blazewicz, Steven^*,1, Schwartz, Egbert¹, ¹ Northern Arizona University, Flagstaff, AZ, Quantification of microbial growth in soil by measurement of ¹⁸O incorporation into DNA from ¹⁸O-water.

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Poster # 120. Williams, Mark^*,1, Tarlera, Silvana², Ivester, Andrew ³, Whitman, William⁴, ¹ Mississippi State University, MS State, MS² Universidad de la República-Uruguay, Montevideo, URUGUAY³ University of West Georgia, Carollton, GA⁴ University of Georgia, Athens, GA, Microbial community composition and diversity during 90,000 years of habitat development in soil chronosequences.

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Poster # 122. Vivanco, Lucia^*,1, Austin, Amy¹, ¹ University of Buenos Aires, Buenos Aires, Argentina, Litter mixing affects decomposition in a Patagonian temperate forest, Argentina.

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Poster # 123. Gurwick, Noel^{*,1, 2}, Raab, Theodore², Field, Christopher^{1, 2}, Vitousek, Peter², ¹ Carnegie Institution, Stanford, CA, USA² Stanford University, Stanford, CA, USA, Soil biochemistry responses after six years of multiple global change manipulations in a California grassland.

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