Abstract

DAVILA-LARA, Marco A. et al. Structure and diversity of tree species in temperate forests of San Luis Potosí, Mexico. Ecosistemas y recur. agropecuarios [online]. 2019, vol.6, n.18, pp.399-409.  Epub Feb 20, 2020. ISSN 2007-901X.  https://doi.org/10.19136/era.a6n18.2112.

The state of San Luis Potosí has forest ecosystems that have been the subject of limited forest research. Studies on tree structure and diversity are carried out to generate the information needed to manage these ecosystems properly. The objective of this research was to evaluate and compare the structure and diversity of forest species for two temperate forest conditions under forest management in San Luis Potosí. A random sampling was carried out for which three sampling plots of 2 500 m2 were established in each location. Tree-size information was obtained from individuals larger than 7.5 cm in diameter at breast height and species composition, density per hectare, abundance, dominance, frequency, importance value index (IVI) and vertical distribution index (A) were determined. For UMA San Rafael, 323 individuals from four families, four genera and 10 species were recorded; the abundance was 430 ha-1 trees, with Pinus teocote being the species with the highest IVI (71.02%). In Predio San Joaquín, 277 individuals belonging to three families, three genera and eight species were recorded; the abundance was 369 trees ha-1, with P. devoniana being the species with the highest IVI (98.92%). Specific richness was 10 and 8 species, with a Margalef index of 1.55 and 1.24. In relation to the diversity of the area, the Shannon index (H’) had a value of 1.91 and 1.51, respectively. P. devoniana is the species with the highest dominance in both locations with 4.04 and 6.62 m2 ha-1.

Keywords : Temperate forests; composition; vertical distribution; diversity indices; forest management.

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