Allometric Growth of Common Urban Tree Species in Qingdao City of Eastern China

Allometric growth equations help to describe the correlation between variables of tree biological characteristics (e.g., diameter and height, canopy width) estimate dynamics at a given dimension. models common species within urban forests are also important relate ecosystem services measurements such as stem diameter. In this study, allometric were developed for used greening on streets seven municipal districts in Qingdao city eastern China. A sampling survey was constructed an urban–rural gradient obtain data diameter, crown width, height live base, height. From these measurements, volume projection area calculated. The relationship two established using quantile regression (95%, 50%, 5%) explore its influence allometry. Our results showed that different varied largely due their own characteristics, same significantly well under fitting quantiles. We found width stronger than Moreover, area–diameter width–diameter similar fitting. analysis provide theoretical way use field support forestry management subsequent evaluation prediction functions services.