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作者

来源

URBAN FORESTRY & URBAN GREENING,Vol.24,P.62-70

语言

英文

关键字

Biomass model; Biomechanics; Fractal properties; Functional branch analysis; Tree allometry; Tree architecture; ALLOMETRIC RELATIONSHIPS; FRACTAL ANALYSIS; CARBON STORAGE; TREE HEIGHT; LEAF-AREA; BRANCHES

作者单位

[Lopez-Lopez, Stephanie F.; Martinez-Trinidad, Tomas; Garcia-Nieto, Moises; de los Santos-Posadas, Hector M.] Colegio Postgrad, Posgrad Ciencias Forestales, Km 36-5 Carretera Mexico Texcoco, Texcoco 56230, Estado De Mexic, Mexico. [Benavides-Meza, Hector] Ctr Nacl Invest Disciplinaria Conservat & Mejoram, Intituto Nacl Invest Forest Agr & Pecuarias, Ciudad De Mexico, Mexico. Martinez-Trinidad, T (reprint author), Colegio Postgrad, Posgrad Ciencias Forestales, Km 36-5 Carretera Mexico Texcoco, Texcoco 56230, Estado De Mexic, Mexico. E-Mail: stephabj87@gmail.com

摘要

One of the limiting factors to estimate accurately the biomass stocks of urban forests is the availability of allometric models developed from urban trees measurements. In addition, the traditional methods (destructive) to develop biomass equations are rarely applied in cities. The aim of this study was to develop a non-destructive method based on fractal analysis for trees of Fraxinus uhdei present in the green areas of Chapultepec Park in Mexico City. Diameter at breast height (DBH), total height and the height of the whorls of 46 randomly-selected trees were measured. In each tree, three different- order branches were collected to measure their total length and that of their links, the diameter before and after each branching point, the insertion angle, the number of branches, twigs and leaves, and fresh and dry weight. The felling of seven individuals at the site was taken advantage of to fit a taper function for the trunk and determine its biomass. Acceptable estimates with good accuracy were obtained for F. uhdei trees with a DBH of less than 23 cm. It is feasible to develop biomass models from measuring the branches and the trunk of young F. uhdei trees through the implementation of structural indices based on fractal geometry and without the need to fell healthy trees.