Abstract

ACOSTA-HERNANDEZ, Celia Cecilia et al. Effect of forest harvesting on morphological variation of Juglans pyriformis Liebm. Rev. Chapingo ser. cienc. for. ambient [online]. 2011, vol.17, n.3, pp.379-388. ISSN 2007-4018.

The forest harvesting based on the extraction of individuals phenotypically better, as well as other factors, could degrade the forest by leaving trees of lesser quality and reducing genetic diversity. The population of Juglans pyriformis in San José Buenavista, Veracruz (SJB) has been reduced by farming and logging for timber production purposes under the Silvicultural Individual Selection Method. The population of Coacoatzintla, Veracruz (COA) has been reduced by change of land use and illegal logging. The objective was to determine the levels of phenotypic variation of J. pyriformis in SJB population and contrast to COA populations found in a previously study, using the same method. In SJB principal component analysis identified three main indicators, SHAFT, CUP and HIGH-DIAM with a high coefficient of variation (26%, 30% and 42% respectively). Cluster analysis showed two groups of trees and the Levene statistic was significant (p <0.05) for the indicator CUP (0030) and HIGH-DIAM (0161). The results show less morphological variation in the population of San José Buenavista in contrast to the population of Coacoatzintla.

Keywords : Juglans pyriformis; forest management; silvicultural selection method; morphological indicators.

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