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conceptual approaches in Mexico - Trends

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A final point that we must comment on deforestation is the trends.

Francisco Takaki's paper INEGI, we discussed in previous emails, gives us some information on these trends:



A first trend is observed, which we mentioned in the message of March 17 last, is that deforestation appears to be slowing down a consistent, increased from 1 million hectares. annual end of the century, to 336.500 in 2002 (Takaki, 2010), 260.400 ha. in 2005 (FAO, 2005).

Secondly, although the previous trend should feed some optimism for the forests, INEGI data indicate a tendency to replace natural forests with high trees and vegetation without trees, Agricultural Use Areas and Zones Urban, who by the end of the century (1986) grew at a rate of 1,009,736 hectares per year and in recent times (2002) grew at a rate of 754.211 hectares. year.

Thirdly, we note a significant reduction of forests and jungles of the highest commercial value, they are replaced in part by communities degraded plant. Most of the value of forest production, comes from coniferous forests and high forests and vegetation types are those who are suffering significant reductions.

For coniferous forests, the observed reduction of 172.000 hectares per year by the end of the century. The loss of these valuable forests accelerated to 290,000 hectares per year in recent times. In the case of evergreen forests, the annual reductions were the order of 183,000 hectares by the end of the twentieth century and 93.000 hectares in recent times.



In summary, while on one hand the reduction global rate of deforestation real, it is feasible to stop deforestation in Mexico in the coming years, ranching, agriculture and urban growth continue to reduce the wild. While they tend to be less disturbed forests are diminishing other vegetation, which has biological and social importance. Moreover, data on the composition, show the reduction in the forests of high commercial value, which speaks of a serious neglect of the sustainability criteria in the management of the forests for commercial purposes.

As the amount of forests and jungles that are lost is reduced, quality of forest vegetation is becoming one of the most important issues for good forest policy in Mexico.




Secondary Vegetation years change Agricultural Use Areas years 34,671,344 years 2002 1,278,985

hectares	difference	annual	1980
32,456,346			1993
6,265,200 38,721,546 481.938			2002
3,646,396 42,367,942 405.155
hectares	difference	annual change	1980
			1993
5,941,046 40,612,390			457.004 2002
2,983,354 43,595,744 331.484
			Urban
hectares	difference	annual change	1980 200.522
			1993
1,120,838 70.794 920.316
158.147 17.572

Secondary vegetation, and urban areas agopecuarias years

hectares	difference	annual change	1980
	67,328,212		1993
80,454,774 13,126,562 1,009,736			2002
6,787,896 87,242,671 754.211

coniferous forest years 16,196,295 1993 13,955,792 -2,240,502 11,339,555 -290.693 -2,616,237

hectares	difference	annual change	1980
			-172.346 2002

Evergreen years 6,381,979 3,995,758 -2,386,220 3,157,560 -93.133 -838.198

hectares	difference	annual change	1980
			1993
			-183.555 2002
			MC

Francisco Chapela

Ladies and