DOI: 10.5061/dryad.3c6d2
title: Data from: The evolution of energetic scaling across the vertebrate tree of life

description: Metabolism is the link between ecology and physiology—it dictates the flow
 of energy through individuals and across trophic levels. Much of the
 predictive power of metabolic theories of ecology derives from the scaling
 relationship between organismal size and metabolic rate. There is growing
 evidence that this scaling relationship is not universal, but we have
 little knowledge of how it has evolved over macroevolutionary time. Here
 we develop a novel phylogenetic comparative method to investigate how
 often and in which clades the macroevolutionary dynamics of the metabolic
 scaling have changed. We find strong evidence that the metabolic scaling
 relationship has shifted multiple times across the vertebrate phylogeny.
 However, shifts are rare and otherwise strongly constrained. Importantly,
 both the estimated slope and intercept values vary widely across regimes,
 with slopes that spanned across theoretically predicted values such as 2/3
 or 3/4. We further tested whether traits such as ecto-/endothermy, genome
 size, and quadratic curvature with body mass (i.e., energetic constraints
 at extreme body sizes) could explain the observed pattern of shifts.
 Though these factors help explain some of the variation in scaling
 parameters, much of the remaining variation remains elusive. Our results
 lay the groundwork for further exploration of the evolutionary and
 ecological drivers of major transitions in metabolic strategy and for
 harnessing this information to improve macroecological predictions.
description: Cleaned White
 DatasetData from McKechnie
 & Wolf (2004) and White et al. (2006) matched to our complete
 phylogeny (857 species). Data columns include lnBMR (log standard
 metabolic rate from White et al. 2006 and McKechnie & Wolf 2004,
 temperature corrected using the Arrhenius equation to 293.15 K); lnMass
 (log mass in grams, from White et al. 2006 and McKechnie & Wolf 2004);
 lnMass2 (squared log mass in grams); lnGS (log genome size in c-values.
 From the animal genome size database) and endo (Indicator variable for
 endothermy, applied to birds and mammals).vertData.csvCleaned vertebrate phylogenyPhylogeny used in analyses of trait evolution. Produced by combining published megaphylogenies including birds (Jetz et al. 2012), squamates (Pyron and Burbrink 2014), amphibians (Pyron and Wiens 2011) and fish (Rabosky et al. 2013). Mammals were constructed using Bininda-Emonds et al. 2007, Meredith et al. 2011 and phylogenies from the OpenTree of life database (Hinchliff et al. 2015) using the pipeline described in the manuscript. Trees were connected using dates from the timetree of life (Hedges et al. 2006) for the 5 major clades.vertTree.treCleaned Kolokotrones datasetCleaned dataset from Kolokotrones et al. (2010) matched to our mammalian phylogeny. Columns are: lnBMR (log standard metabolic rate in mlO2h^-1 from Kolokotrones et al. 2010); lnMass (log body mass in grams from Kolokotrones et al. 2010); lnMass2 (squared log body mass in grams); TempK (body temperature^-1 in Kelvins^-1 from Kolokotrones et al. 2010, and the Pantheria database, Jones et al. 2009 when absent from Kolokotrones et al. 2010).kolokotronesData.csvCleaned Kolokotrones phylogenyOur mammal phylogeny produced using our OpenTree pipeline (described in the full vertebrate phylogeny and manuscript) matched to the Kolokotrones dataset.kolokotronesTree.tre