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Respiration measurements of whole tree plants have been reported that giveevidence that the relative per volume/mass unit respiration decreases withincrease of tree body size. In this study, based on the available datapublished a question was explored if the relative per area unit respiration intrees can be a constant, independent of the surface area size. There is adefinite gap in the published data when the allometric studies of tree bodystructure do not intercept with studies on trees respiration. Thus the questionwas studied with the help of indirect comparison between various data. Thecomparison showed that the scaling exponents, volume vs. surface area andrespiration vs. stem volume, are slightly larger than they should be for thehypothesis of the relative respiration constancy to hold. The data studied giveevidence that the relative per area unit respiration slightly increases withthe increase in tree surface area. Possible explanations of the relationshipinclude a different distribution of metabolically active parts of stem andhigher nitrogen content in larger trees. Also, the published datasets mightinclude large fast growing trees, which imply that larger trees grow faster andhence have higher per unit surface area growth respiration. A crucialexperiment is required in which the respiration measurements were performed forthe same data as the measurements of scaling between stem volume and surfacearea.

Whether relative respiration in trees can be constant: a discussion of a scaling hypothesis