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The functional role of forests ecosystems in climate change mitigation is well recognized by fixing atmospheric carbon (C). However, they are also vulnerable to natural and human-induced disturbances. Forests may act as sinks or sources depending on the balance between atmospheric CO2 emissions and removals. Nonetheless, C dynamics in forest ecosystems are complex and multifactorial. Understanding these dynamics is essential for managing forests sustainably and preserving C stocks. Questions such as to what extent does the carbon cycle change when a forest is harvested? What is the behavior of managed forests for timber production in terms of CO2 emissions and removals? Are the forests under community-based forest management sustainable? are necessary to answer, to determine precisely the magnitude to which forests under forest management are capable of removing atmospheric CO2, and therefore mitigating climate change. Here I will use as a model the Intensive Carbon Monitoring Site Atopixco in central Mexico, to show some results regarding C dynamics in intensively managed forest for timber production. The aim of this site is to generate detailed information regarding C stocks and flux rates that may not be easily quantified over large areas, and to analyze processes of CO2 uptake and release that can help explain observed changes that result from forest management activities and natural disturbances. Of particular interest is the community-based forest management for timber production in Mexico, since most of such forested land is owned by ejidos and communities, where they are actively involved in decision-making regarding forestry operations and forest conservation.