Abstract

MENDEZ OSORIO, Cuauhtémoc et al. Phytodiversity and structure of a pine - oak forest in the Sierra Madre del Sur, México. Rev. mex. de cienc. forestales [online]. 2018, vol.9, n.50, pp.35-53. ISSN 2007-1132.  https://doi.org/10.29298/rmcf.v9i50.236.

The condition of the vegetation of a pine forest in the Sierra Madre del Sur in the state of Guerrero, Mexico, was evaluated. Five 1 000 m2 circular plots were established. A census of every > 4’ DBH woody species was made. The height (h), diameter (DBH) and canopy diameter were measured for each tree. Density, coverage, and frequency were estimated. The importance value index was calculated as well as diversity through the Margalef Index (DMg) and the Shannon-Wiener Index (H'). The vertical structure was described by Pretzsch Index. In total, five species which belong to two families and two genera were recorded. The family with the greatest presence in the study was Fagaceae with three species. The specie with the highest value of importance was Pinus oocarpa, 63.53 %, in contrast to Quercus rugosa with 3.23 %. The vertical diversity index of Pretzch recorded the highest occurrence of species in the low stratum, with 50.4 % of the individuals; of which P. oocarpa contributed by 51 individuals. It is concluded that the evaluated plant community is in an active regeneration state and has low diversity as well as scarce species richness.

Keywords : Mixed forest; diversity; phytodiversity; ecological indicators; Pretzch Index; Pinus - Quercus forests.

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