RATIONALE: MEXICO IS A MEGA-DIVERSE COUNTRY WHERE NEARLY 40% OF ITS TERRITORY IS COVERED BY FORESTS. THE LONG-TERM IMPACTS OF LAND USE AND ANTHROPOGENIC CHANGES HAVE FRAGMENTED AND FUNDAMENTALLY TRANSFORMED MEXICAN LANDSCAPES. THEREFORE FORESTS IN MEXICO ARE DETERMINED BY CLIMATE GRADIENTS AND LAND HISTORY CREATING A HETEROGENEOUS LANDSCAPE. THE MOST IMPORTANT LAND USE CHANGE TYPESHAVING CAUSED SEVERE ECOLOGICAL DEGRADATION INCLUDE: DEFORESTATION HIGH IMPACT LIVESTOCK GRAZING AND SOIL TILLAGE. FURTHERMORE MEXICO HAS SHOWN AN AVERAGE RATE OF DEFORESTATION OF NEARLY 550 000 HA YEAR FOR THE PERIOD 1993 2007 WITH A SLIGHT INCREASE IN NATURAL FOREST REGENERATION PARTICULARLY IN SOUTHERN MEXICO. IT IS ESTIMATED THAT GROSS PRIMARY PRODUCTIVITY (GPP) OF THE CONTERMINOUS USA IS ~7 PGC BUT MEXICO S ECOSYSTEMS UPTAKE ~2.6 PGC YR-1 WITH ONLY 1/3 OF THE USA LAND MASS. DURING THE LAST DECADE THE SCIENTIFIC CAPACITY OF MEXICAN SCIENTISTS HAS RAPIDLY INCREASED AND STATE-OF-THE-ART MEASUREMENTS ON CARBON DYNAMICS ARE NOW AVAILABLE ATREPRESENTATIVE LANDSCAPES AND NATIONALLY SUPPORTED BY REMOTE SENSING AND A NATIONAL FOREST INVENTORY. THUS THE TIME IS RIPE TO TEST DIFFERENT APPROACHES TOWARDS A FRAMEWORK FOR MONITORING REPORTING AND VERIFICATION (MRV) TO SUPPORT IMPLEMENTATION OF REDD+ ACROSS A GRADIENT OF FORESTS IN MEXICO.