Alison Hoyt^1,2, Hinsby Cadillo-Quiroz³, Arturo Bazán Pacaya⁴, Marie Jacobs⁵, Rony Shapiama Peña⁴, Diego Ramirez Navarro⁴, David Urquiza-Muñoz^1,4 and Susan Trumbore¹, (1)Max Planck Institute for Biogeochemistry, Jena, Germany, (2)Lawrence Berkeley National Laboratory, Berkeley, United States, (3)Arizona State University, School of Life Science, Tempe, AZ, United States, (4)Universidad Nacional de la Amazonia Peruana, Laboratorio de Suelos, Centro de Investigaciones de Recursos Naturales de la Amazonia Peruana, Iquitos, Peru, (5)Friedrich-Wilhelms University of Bonn, Bonn, Germany