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Botanical Sciences

versão On-line ISSN 2007-4476versão impressa ISSN 2007-4298


HERNANDEZ RAMIREZ, Victor; LOPEZ-MATA, Lauro; CRUZ-RODRIGUEZ, Juan Antonio  e  LUNA CAVAZOS, Mario. Regeneration niche of Abies religiosa (Kunth) Schltdl. & Cham. on Mount Tláloc, Iztaccíhuatl-Popocatépetl National Park, México. Bot. sci [online]. 2022, vol.100, n.2, pp.331-344.  Epub 22-Mar-2022. ISSN 2007-4476.


The physical and biological factors involved in the survival and mortality risks of seedlings are important to understand the natural processes associated with their establishment in a spatio-temporal context.


Identify which environmental factors define the regeneration niche of Abies religiosa based on the survival and mortality risks of its seedlings.


Seventeen plots of 1 m2 were established and all the seedlings of the 2019 cohort were located, numbered and measured in height, number of embryonic leaves, number of nodes and visible damage and followed for a year. The properties of the soil surrounding the plots were determined. In each plot, hemispheric photographs were taken and based on them, the canopy was stratified into two categories: partially closed and open. Analyses were performed with the SAS LIFETEST and LIFEREG procedures.


The seedling survival curves were different between the canopy categories (Log-Rank: χ2 = 8.35, gl = 1, P < 0.05). The probability of survival under open canopy was higher (0.29 ± 0.01) than under partially closed canopy (0.20 ± 0.01). The variables with positive effects on survival times were: height and number of nodes; proportion of direct sunlight, bulk density of the soil, mean temperature, mean humidity and its coefficient of variation, and the variation of the soil saturation point.


These covariates define the regeneration niche of A. religiosa.

Palavras-chave : Demography; fir; longitudinal analysis; survival.

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