Professor at the Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, México. Bachelor degree in  Biology (Universidad Metropolitana – Xochimilco, Mexico city), Master in Forestry Sciences (Universidad Autónoma  Chapingo, Estado de México) and Ph.D. in Forestry  (University of Wisconsin-Madison, USA).  Sabbatical years at : Centre de foresterie des Laurentides, Quebec city, Canada; UMR Biodiversité Gènes & Communautés, INRA, Cestas, France; UMR BioForA, INRAE, Orleans, France.