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To have a framework of definitions, it should be noted that the Royal Academy of Language, defines "deforestation" and the "action and effect of deforestation." Is a word that perhaps comes from deforestation French, English and this deforestation. 
"Deforesting
"Deforesting " is "
strip of land forest plants." " Forest" comes from Latin forestālis and refers to "belonging or relating to forests and the harvesting of firewood, grass, etc..." The Latin word forestālis comes from "fora", ie outside. From this point of view, forest life forms do not refer only to trees or wooded areas, but what is "outside" areas where people live, planting and cultivating their gardens and fruit. Basically, it refers to communities of wild trees, plants, animals and microorganisms. Thus, not only the forests but natural grasslands, scrub, mangroves or rocky mountainous areas, are environments "forest." Similarly, plantations for wood chips, paper or orchards, but are formed by woody plants should not be considered as "forest." In fluent English, the permanent loss of wildlife communities, could be considered "deforestation." However, to keep track of the processes of change at the national and global levels, FAO has restinga deforestation definition "the conversion of forests to other land use or the reduction of crown cover to less than ten percent limit. "
Deforestation includes areas of forest converted to agriculture, pasture, water reservoirs and urban areas. Deforestation also includes areas where, for example, the impact of disturbance, over- or changing environmental conditions affect the forest so that it can not accommodate a crown cover greater than ten percent threshold. The term specifically excludes areas where trees were removed because of the holding or clearing, and where the forest is expected to regenerate naturally or with the aid of silvicultural techniques. Unless logging is followed by a continuous land clearing by a disturbance, forests generally regenerate, although often under a different condition, is secondary. In areas of shifting cultivation, forest, forest fallow and agricultural land, they appear under a dynamic pattern where deforestation and the return of the forest often occurs in small islands. To simplify the reports on, is often used as the net change in a wider area (1). That is, the FAO chooses to monitor changes in tree cover lost to expsnsas Follow up on other wilderness areas, which might be considered "forest."
From the reports of the Mexican government, the FAO reported for Mexico in 2005 a coverage of 64.238 million hectares of forest, ie 33.7% of land area. When comparing the forest assessments, 1990, 2000 and 2005, FAO reported 69,016, 65,540 and 64.238 million hectares trees, respectively. This means the loss of about 5 million hectares between 1990 and 2005 and lost an average of 348.000 hectares per year, ie 0.5% (2)
Notes:
(1) FAO: Assessment of Forest Resources Assessment 2005. http://www.fao.org/forestry/fra/fra2005/es/ FAO. 2001. Forest Resources Assessment Assessment 2000 - main report.
Rome (2) FAO: Assessment of Forest Resources 2005. Global tables.
http://www.fao.org/forestry/32032/es/
MC
Francisco Chapela
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