The predominance of quarter-power scaling in biology

V. M. Savage, J. F. Gillooly, W. H. Woodruff, G. B. West, A. P. Allen, B. J. Enquist, J. H. Brown

Research output: Contribution to journalReview article

427 Scopus citations

Abstract

1. Recent studies have resurrected the debate over the value for the allometric scaling exponent that relates whole-organism metabolic rate to body size. Is it 3/4 or 2/3? This question has been raised before and resolved in favour of 3/4. Like previous ones, recent claims for a value of 2/3 are based almost entirely on basal metabolic rate (BMR) in mammals. 2. Here we compile and analyse a new, larger data set for mammalian BMR. We show that interspecific variation in BMR, as well as field metabolic rates of mammals, and basal or standard metabolic rates for many other organisms, including vertebrates, invertebrates, protists and plants, all scale with exponents whose confidence intervals include 3/4 and exclude 2/3. Our analysis of maximal metabolic rate gives a slope that is greater than and confidence intervals that exclude both 3/4 and 2/3. 3. Additionally, numerous other physiological rates that are closely tied to metabolism in a wide variety of organisms, including heart and respiratory rates in mammals, scale as M-1/4. 4. The fact that quarter-power allometric scaling is so pervasive in biology suggests that different allometric relations have a common, mechanistic origin and provides an empirical basis for theoretical models that derive these scaling exponents.

Original languageEnglish (US)
Pages (from-to)257-282
Number of pages26
JournalFunctional Ecology
Volume18
Issue number2
DOIs
StatePublished - Apr 1 2004

Keywords

  • Body size
  • Metabolic rates
  • Physiological times
  • Quarter-power scaling

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

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    Savage, V. M., Gillooly, J. F., Woodruff, W. H., West, G. B., Allen, A. P., Enquist, B. J., & Brown, J. H. (2004). The predominance of quarter-power scaling in biology. Functional Ecology, 18(2), 257-282. https://doi.org/10.1111/j.0269-8463.2004.00856.x