Resumen

VIVEROS VIVEROS, Héctor et al. Variation in initial growth and survival of Pinus hartwegii Lindl. from Cofre de Perote, state of Veracruz. Rev. mex. de cienc. forestales [online]. 2025, vol.16, n.89, pp.140-159.  Epub 30-Jun-2025. ISSN 2007-1132.  https://doi.org/10.29298/rmcf.v16i89.1515.

The initial growth of forest plants with a wide altitudinal distribution may differ depending on their origin. Pinus hartwegii has wide altitudinal distribution in the Cofre de Perote forest, located at the state of Veracruz, thus, it is necessary to know whether the altitude influences the growth of the species. The objective of this study was to evaluate at four separate ages the variation in base diameter, initial height and survival of P. hartwegii seedlings at four altitudes in the aforementioned place. Seeds collected at four altitudes (3 450-4 050 m) were germinated and a common garden test was established. The height and base diameter of the seedlings were evaluated at 9, 10, 11 and 12 months old, and survival at 13 months. Significant differences between altitudes were obtained (P<0.0001) for all variables at all ages. In the first assessment, the plants at extreme altitudes (the lowest and highest elevation) accomplished the tallest heights compared to those at intermediate elevation; at the oldest ages, the plants at the lowest elevation had the greatest heights, while the plants from the intermediate elevation (3 650 m) had the lowest height. The base diameter trend was similar to seedlings heights at advanced age, while survival was similar to height growth at early ages. Altitude has a significant effect on the growth of the P. hartwegii in Cofre de Perote.

Palabras llave : Plant height; Cofre de Perote; base diameter; common garden test; altitudinal gradient; Pinus hartwegii Lindl.

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