Resumo

GARCIA GARCIA, Samuel Alberto; NARVAEZ FLORES, Raúl; OLIVAS GARCIA, Jesús Miguel  e  HERNANDEZ SALAS, Javier. Diversity and vertical structure of the pine-oak forest in Guadalupe y Calvo, Chihuahua. Rev. mex. de cienc. forestales [online]. 2019, vol.10, n.53, pp.41-63. ISSN 2007-1132.  https://doi.org/10.29298/rmcf.v10i53.173.

Areas with and with no forest management from UMAFOR 0808 Guadalupe y Calvo, Chihuahua; under the Mexican Management Method of Irregular Forests (MMOBI) were evaluated. The information from 95 clusters of the National Forest and Soil Inventory (2004-2009) in areas with management and 27 unmanaged conglomerates were analyzed and compared. The vertical structure was determined by means of natural regeneration, strata of tree height and sociological position. The species with a continuous distribution from the lower stratum of regeneration to the upper tree stratum in the forest under management were: Pinus durangensis, P. arizonica, P. ayacahuite, P. herrerae, and P.engelmannii; while in the forest without management were: P. durangensis, and P. arizonica. The main differences found among the studied forests is the average height in the upper tree stratum; since in the managed forests it was 30.16 m, while in the unmanaged forest its value was 21.86 m. In addition, greater regeneration of P. durangensis was observed in the areas under management. Regarding the diversity of species between both forests, it was found that there is no significant difference (p>0.05). Therefore, it is concluded that according to the analyzed information, the regulation of timber exploitation with the MMOBI allows to maintain structural and species diversity, similar to that of a natural forest without management.

Palavras-chave : Effect of forest management; Mexican Management Method of Irregular Forests; Pinus durangensis Martínez; sociological position; natural regeneration; Sierra Madre Occidental.