Title

Biological scaling: Does the exception prove the rule?

Document Type

Article

Publication Date

February 2007

Abstract

Arising from P. B. Reigh, M. G. Tjoelker, J.-L. Machado & J. Oleksyn Nature 439, 457-461 (2006)10.1038/nature04282; Reich et al. reply, Hedin replyReich et al. report that the whole-plant respiration rate, R, in seedlings scales linearly with plant mass, M, so that R = cRMθ when θ ≈ 1 in which cR is the scaling normalization and θ is the scaling exponent. They also state that because nitrogen concentration (N) is correlated with cR, variation in N is a better predictor of R than M would be. Reich et al. and Hedin incorrectly claim that these "universal" findings question the central tenet of metabolic scaling theory, which they interpret as predicting θ = 3/4, irrespective of the size of the plant. Here we show that these conclusions misrepresent metabolic scaling theory and that their results are actually consistent with this theory.

Journal

Nature

Volume

445

Issue

7127

First Page

E9

Last Page

E10

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