Scaling Exponent: 2/3 or 3/4?. B=aM^b. Scaling Exponents. Should it be 2/3 or 3/4? (theoretical controversy) Is it 2/3 or 3/4? (empirical controversy) How universal is this metabolic scaling anyway? What is the limiting factor in metabolism? Can we really distinguish between 2/3 and 3/4? .
White and Seymour, 2002. They argue that the 3/4 power law is wrong. To really look at metabolic rate, we need to compare similar things.
BMR, in a post-absorptive, resting, conscious state.
Adjusted for temperature dependence of metabolism using BMRc=BMR*10^(Tc-Tb)log(Q10/10)
Excluded certain species
The most restrictive data set gave them b=.68, which was significantly different from 3/4 but not 2/3
Data, Brown et al. Small plants show different metabolic scaling than big plants.
Hui and Jackson, 2007. A mathematical analysis of the impact of sample size, measurement error and line fit technique on the determined exponent
Used data from Savage et al, 2004.