Resumen

GARCIA CUEVAS, Xavier et al. Local height-diameter model for Metopium brownei (Jacq.) Urb. in Quintana Roo, Mexico. Rev. mex. de cienc. forestales [online]. 2022, vol.13, n.73, pp.102-127.  Epub 10-Oct-2022. ISSN 2007-1132.  https://doi.org/10.29298/rmcf.v13i73.1199.

Metopium brownei is a timber species of high commercial value with the potential to help satisfy the furniture market in the Yucatán Peninsula, Mexico. Knowing the allometric relationship total height-normal diameter (at-d) reduces time and costs to carry out forest inventories. The objective of this study was to adjust growth models to estimate the total height as a function of the normal diameter in M. brownei trees as well as to determine the effect on precision and predictive quality when incorporating the mixed effects model (MEM) technique. A sample of 2 794 trees measured in the 2004—2009 National Forest and Soil Inventory for the state of Quintana Roo, was used with which six models were adjusted with the nonlinear least squares technique (MCNL). Subsequently, the MEM technique was applied to the best model with grouping levels given by the covariates of vegetation type (Veg) and municipality (Mpio). The best model under MCNL was the Chapman-Richards model because it explained 45 % of the sample variability, while, under MEM and when grouping Veg-Mpio in a combined way, the adjustment statistics were higher since the explanation was 50 %, the bias was 0.003 m and the percentage difference was 0.001 %. Validation using independent samples did not show significant differences. The proposed model is reliable to estimate the at-d relationship of this species in the tropical forests of Quintana Roo, both to obtain data from a forest inventory and in the preparation and execution of management plans.

Palabras llave : Tropical forest; random effects; nonlinear functions; forest inventory; forest management; allometric relationship.

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