Gabriel George Katul, Duke Univ, Durham, NC, United States, Assaad Mrad, Duke University, Nicholas School of the Environment, Durham, NC, United States, Sanna Sevanto, Los Alamos National Laboratory, Los Alamos, NM, United States and Jean-Christophe Domec, Bordeaux Sciences Agro, UMR INRA-ISPA 1391, 33195, Gradignan, France