1:30 PM McGroddy, Megan^*,1, Baisden, William², Hedin, Lars ¹, ¹ Princeton University, Princeton, NJUSA² Landcare Research, Palmerston North, New Zealand Nutrient losses from undisturbed forests in New Zealand: Patterns of N and P loss along a gradient of parent material.

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1:50 PM Baisden, W.^*,1, McGroddy, Megan², Hedin, Lars², ¹ Landcare Research, Palmerston North, New Zealand² Princeton University, Princeton, NJ Nutrient losses from undisturbed forests in New Zealand: C, N and P loss as a function of climate and soil properties.

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2:10 PM Neff, Jason¹, Belnap, Jayne², Sanford, Robert ³, Miller, Mark², Reynolds, Richard⁴, ¹ University of Colorado, Boulder, CO, USA² US Geological Survey, Moab, UT, USA³ Denver University, Denver, CO, USA⁴ US Geological Survey, Denver, CO, USA Plant stoichiometric response to landscape-scale variation in bedrock geochemistry: Interactions of P, Ca and Fe in a semi-arid environment.

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2:30 PM Titiz, Beyhan^*,1, Sanford Jr., Robert^*,1, ¹ University of Denver, Denver, CO Soil phosphorus patterns from the continental divide to sea level in a Costa Rican rainforest.

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2:50 PM Schaeffer, Sean^*,1, Ziegler, Susan¹, Evans, R. Dave², ¹ University of Arkansas Stable Isotope Laboratory, Fayetteville, AR, USA² School of Biological Sciences, Pullman, WA, USA Linking microbial soil carbon and nitrogen cycling in a Mojave Desert ecosystem under elevated atmospheric carbon dioxide.

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3:10 PM Break.

3:20 PM Miller, Amy^*,1, Schimel, Joshua¹, Meixner, Tom², Sickman, James³, Melack, John¹, ¹ University of California, Santa Barbara, CA, USA² University of California, Riverside, CA, USA³ University of New Orleans, New Orleans, LA, USA Episodic rewetting enhances carbon and nitrogen release from seasonally arid soils.

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3:40 PM Lohse, Kathleen¹, ¹ University of California, Berkeley, Berkeley, CA, 94720 Consequences of nitrogen additions for base cation losses and aluminum mobility in tropical forests of contrasting soil age.

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4:00 PM Lajtha, Kate^*,1, Crow, Susan¹, Yano, Yuriko², Kaushal, Sujay³, Sulzman, Elizabeth¹, Spears, Julie¹, ¹ Oregon State University, Corvallis, OR² Ecosystems Center, Woods Hole, MA³ Institute of Ecosystem Studies, Millbrook, NY Detrital controls on soil organic matter dynamics and soil solution chemistry: An experimental approach.

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4:20 PM Groffman, Peter¹, ¹ Institute of Ecosystem Studies, Millbrook, NY, USA Microbial carbon and nitrogen cycle process response to calcium additions in a northern hardwood forest.

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4:40 PM Bern, Carleton^{*,1, 2}, Townsend, Alan^{1, 2}, Farmer, G.², ¹ Institute for Arctic and Alpine Research, Boulder, CO, USA² University of Colorado, Boulder, CO, USA Dominance of parent-material strontium in a tropical forest on highly weathered soils.

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