Abstract
In recent years, the technology for measuring the diameter and height of standing trees has improved significantly. These enhancements allow estimation of the volume of standing trees using stem taper equations, which traditionally have been constructed with data from felled trees, in an accurate and economically feasible way. A non-destructive method was evaluated with data from 38 pines and was validated with data from another 38 pines, both in the Northern Iberian Range (Spain). The electronic dendrometer Criterion RD1000 (Laser Technology Inc.) and the laser hypsometer TruPulse (Laser Technology Inc.) were used due to their accuracy and interoperability. The methodology was valid (unbiased and precise) measuring from a distance similar to the height of the tree. In this distance, statistical criteria and plots based on the residuals showed no clear advantage in volume estimation with models fitted with data from destructive methods against models fitted with data from the proposed non-destructive technique. This methodology can be considered useful for individual volume estimation and for developing taper equations.
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Acknowledgments
This work was financially supported by the Castilla y León Economic Development Agency (ADE in Spanish), the Junta de Castilla y León (Section I of Environment Service in Soria) and Cesefor Foundation. We thank Jonàs Oliva for providing very helpful manuscript review; we also appreciate the helpful review comments provided by two anonymous referees and the Associate Editor.
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Communicated by M. Meincken and T. Seifert.
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Rodriguez, F., Lizarralde, I., Fernández-Landa, A. et al. Non-destructive measurement techniques for taper equation development: a study case in the Spanish Northern Iberian Range. Eur J Forest Res 133, 213–223 (2014). https://doi.org/10.1007/s10342-013-0739-5
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DOI: https://doi.org/10.1007/s10342-013-0739-5