Resumen

SANCHEZ-RODRIGUEZ, E.V. et al. Dynamic of the montane cloud forest south-central Jalisco, Mexico. Polibotánica [online]. 2018, n.46, pp.91-118. ISSN 1405-2768.  https://doi.org/10.18387/polibotanica.46.5.

Changes in structure and taxonomic composition of the arboreal component of a tropical montane cloud forest were monitored along 12 years (1998, 2004 and 2010) with eight 2,500 m2 permanent plots in south-central Jalisco, Western Mexico. Changes in structure (density, frequency, basal area and relative importance value index-IVI) and composition (species, genera and family richness) were recorded.

Results revealed significant differences in structure and composition among plots and within plots monitored at different times. Density increased from 1 190 to 1 239 individuals ha-1 between 1998 and 2004 and then reduced to 1 164 individuals from 2004 to 2010. Average basal area per hectare was similar in 1998 (36.15) and 2001 (36.19) and increased slightly in 2010 (37.53 m2). Styrax radians, Siparuna thecaphora and Conostegia xalapensis displayed the highest relative frequency 100% relative frequency. Styrax radians followed by Ficus aurea and Quercus iltisii.had the highest IVI in 1998, 2004 and 2010.

Spatio-temporal changes in structure and floristic composition were associated with germination and dispersal and with human disturbance caused by livestock, subsistence farming, falling trees, illegal cutting and land use change.

Palabras llave : basal area; density; disturbance; frequency; richness; structure.

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