Zheng Shi¹, Steven D Allison¹, James Tremper Randerson², Yujie He³, Paul Alexander Levine⁴, Alison Hoyt⁵ and Susan Trumbore⁶, (1)University of California Irvine, Ecology & Evolutionary Biology, Irvine, CA, United States, (2)University of California Irvine, Department of Earth System Science, Irvine, CA, United States, (3)University of California Irvine, Earth System Science, Irvine, CA, United States, (4)University California Irvine, Department of Earth System Science, Irvine, CA, United States, (5)Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, Cambridge, CA, United States, (6)Department of Biogeochemical Processes, Max Planck Institute for Biogeochemistry, Jena, Germany