Abstract

RAMOS REYES, Juan Carlos et al. Productivity and vertical structure of a temperate forest with incidence of forest fire. Rev. mex. de cienc. forestales [online]. 2017, vol.8, n.43, pp.64-88. ISSN 2007-1132.

The effects caused by a forest fire, the vertical structure and the association of tree species and their relation to productivity were evaluated through mensuration variables. Field work was performed in two areas, burned and non-burned, in which 36 circular sites of 11.28 m radius and 400 m2 were established. A classification in three strata was made based upon the Pretzsch index: stratum I (80-100%), stratum II (50-80%) and stratum III (0-50%). Productivity was determined using mensuration data as individual density (ha-1), basal area (m2 ha-1), crown area (m2 ha-1) and volume (m3 ha-1). Productivity for statistical analysis was performed by the r-Studio® program (Ver. 3.1.1), through a comparison of means between independent groups of parameters. Analysis of the vertical structure using the A Pretzsch index showed that the burned area was higher with 2.71 against 2.20 A max in the non-burned area. Stratum II concentrated more individuals per hectare in the two areas (50% and 33%), with a maximum height of 23.9 and 26 m, respectively. Productivity increased in the burned area, which is explained from the Pinus pseudostrobus abundance, while the non-burned area recorded less individuals per hectare, deferred from lower proportionality in volume (m3 ha-1). It is concluded that there are structural and productivity benefits in a forest with fire incidence.

Keywords : Maximum height; burned area; vertical stratification; A Pretzsch index; mensuration parameters; forest productivity.

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