1:30 PM Gonzalez-Meler, Miquel^*,1, ¹ Department of Biological Sciences, Chicago, IL, USA Introduction: Respiration across scales.

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1:40 PM Berry, Joe^*,, The Balance Between Respiration and Photosynthesis.

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2:10 PM Ryan, Michael^{*,1, 2}, ¹ mgryan@fs.fed.us, Fort Collins, CO 80526, USA² Graduate Degree Program in Ecology, Fort Collins, CO 80523, USA Rate-based respiratory measurements without a system context are impeding a mechanistic understanding of the controls on respiratory fluxes.

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2:35 PM Bowling, David^*,1, Yakir, Dan², ¹ Dept of Biology, Salt Lake City, Utah² Dept of Environmental Sciences and Energy Research, Rehovot, Israel Interpreting ecosystem respiration fluxes using stable isotopes.

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3:00 PM Raich, James^*,1, ¹ Iowa State University, Ames, IA, U.S.A. Anabolic and catabolic contributions to total soil respiration.

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3:25 PM Break.

3:45 PM Trumbore, Susan ^*,1, Gaudinski, Julia ², Davidson, Eric ³, Cisneros Dozal, Luz Maria¹, Camargo, Plinio⁴, Schuur, Edward⁵, Chambers, Jeffrey¹, ¹ University of California-Irvine, Irvine, CA² University of California-Santa Cruz, Santa Cruz, CA³ The Woods Hole Research Center, Woods Hole, MA⁴ Centro de Energia Nuclear na Agricultura, Piracicaba, Sao Paulo, Brazil⁵ University of Florida-Gainseville, Gainseville, FL Sources of soil respiration determined using radiocarbon.

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4:10 PM Jastrow, Julie^*,1, ¹ Argonne National Laboratory, Argonne, IL Mean residence time of soil carbon pools: controlling factors and implications for soil carbon cycling.

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4:35 PM De Lucia, Evan ^*,1, Schlesinger, William^*,2, ¹ University of Illinois, Urbana, IL, USA² Duke University, Durham, NC, USA Respiratory control of the carbon cycle in a changing environment: synthesis and discussion.

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