Skip to content

Space versus phylogeny: disentangling phylogenetic and spatial signals in comparative data.

by Robert P. Freckleton, Walter Jetz
Proceedings. Biological sciences / The Royal Society ()
Get full text at journal


Variation in traits across species or populations is the outcome of both environmental and historical factors. Trait variation is therefore a function of both the phylogenetic and spatial context of species. Here we introduce a method that, within a single framework, estimates the relative roles of spatial and phylogenetic variations in comparative data. The approach requires traits measured across phylogenetic units, e.g. species, the spatial occurrences of those units and a phylogeny connecting them. The method modifies the expected variance of phylogenetically independent contrasts to include both spatial and phylogenetic effects. We illustrate this approach by analysing cross-species variation in body mass, geographical range size and species-typical environmental temperature in three orders of mammals (carnivores, artiodactyls and primates). These species attributes contain highly disparate levels of phylogenetic and spatial signals, with the strongest phylogenetic autocorrelation in body size and spatial dependence in environmental temperatures and geographical range size showing mixed effects. The proposed method successfully captures these differences and in its simplest form estimates a single parameter that quantifies the relative effects of space and phylogeny. We discuss how the method may be extended to explore a range of models of evolution and spatial dependence.

Cite this document (BETA)

Readership Statistics

440 Readers on Mendeley
by Discipline
78% Agricultural and Biological Sciences
15% Environmental Science
3% Earth and Planetary Sciences
by Academic Status
30% Researcher
28% Student > Ph. D. Student
13% Student > Master
by Country
6% United States
3% Brazil
2% Germany

Sign up today - FREE

Mendeley saves you time finding and organizing research. Learn more

  • All your research in one place
  • Add and import papers easily
  • Access it anywhere, anytime

Start using Mendeley in seconds!

Sign up & Download

Already have an account? Sign in