The Role of Monitoring in Sustainable Ecosystem Management: a Case Study for the Tropical Deciduous Forest in West Mexico – EMAN-ILTER Meeting, Ottawa, Canada. April 10-12, 2002 EMAN-ILTER Meeting, Ottawa, Canada. April 10-12, 2002 Manuel Maass, Víctor Jaramillo Angelina Martínez-Yrízar & Felipe García-Oliva Instituto de Ecología Universidad Nacional Autónoma de México Campus Morelia