Abstract

TADEO-NOBLE, Alfredo Esteban et al. Patterns of structure and diversity in a medium sub-evergreen. Rev. mex. de cienc. forestales [online]. 2024, vol.15, n.81, pp.133-159.  Epub May 13, 2024. ISSN 2007-1132.  https://doi.org/10.29298/rmcf.v15i81.1424.

Vegetation structure patterns (VSP) are affected by the dynamic interaction between social and ecological elements. The objective was to describe the patterns of structure and diversity of the medium sub-evergreen forest after timber harvesting in Noh Bec, Quintana Roo, Mexico. The forest management areas were sampled simultaneously at three stages of tree development in 10×50-m rectangular sampling units (poles with ND [1.3 m]≥25 cm), and 10-m (saplings with ND≥5 to <25 cm) and 2-m square hierarchical units (seedlings with DN<5 cm). Diameter structure, Importance Value Index (IVI), and alpha diversity were calculated. Seventy species (29 families and 64 genera), 52 675 individuals ha-1 were recorded among the seedlings, 1 015 individuals ha-1, 9.51 m2 ha-1 of basal area (BA) and 112.60 m3 ha-1 of total tree volume (TTV) among saplings, and 95 individuals ha-1, 12.08 m2 ha-1 of BA and 145.41 m3 ha-1 of TTV among poles. The Sapotaceae family accounted for the largest proportion of the IVI. Pouteria reticulata was the most important species among the seedlings and saplings, while among the poles, it was Manilkara zapota. The diversity of the VSPs is evident, however, it is possible to distinguish them through specific indicators such as Fisher's alpha and structural dasometric values.

Keywords : Seedlings; poles; Community Forestry Management; saplings; Noh Bec; Pilot Forestry Plan.

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