Resumo

FIGUEROA NAVARRO, Consuelo Marisel et al. Structural dynamics and basimetric area of mixed forests in two protected natural areas of Jalisco State. Rev. mex. de cienc. forestales [online]. 2023, vol.14, n.77, pp.4-30.  Epub 11-Ago-2023. ISSN 2007-1132.  https://doi.org/10.29298/rmcf.v14i77.1318.

The Flora and Fauna Protection Areas Bosque La Primavera (BLP) and Sierra de Quila (SQ) in the state of Jalisco, are frequently affected by anthropic factors that modify their spatial distribution and tree growth. The objective of this study was to compare basal area, stem density and annual periodic increment in basimetric area for type of vegetation in both natural protected areas in the 2005-2020 period. In both areas, were measured the normal diameter (nd) and total height of trees in 88 sampling plots, established in 2005 and remeasured in 2013 and 2020. The mean basimetric area of BLP was 13, 12 and 16 m2 ha-1 (2005, 2013 and 2020, respectively), with a mean increment of 0.21 m2 ha-1 year-1; while in SQ it was 16, 18 and 20 m2 ha-1 (for 2005, 2013 and 2020, respectively) with an increment of 0.27 m2 ha-1 year-1. The most representative diameter categories for the dominant species were 10 to 15 cm of nd for Quercus magnoliifolia in BLP, Quercus resinosa and Pinus douglasiana in SQ, and 20 to 25 cm of nd for Pinus oocarpa in BLP. Stem density, basal area and the annual periodic increment was higher in SQ than in BLP, attributable to the forest fires that affected BLP every year, despite that in SQ sanitation fellings were made to control bark beetle outbreaks and mistletoe infestations.

Palavras-chave : Bosque La Primavera; oak–pine forest; diameter categories; stem density; periodic annual increment,; Sierra de Quila.

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