On the need for phylogenetic ‘corrections’ in functional trait-based approaches
There is considerable uncertainty about if, and when, phylogenetic information is needed to answer various ecological questions about trait-based ecological studies. It has been recommended that both functional and phylogenetic information should be combined, and some researchers have even suggested that functional information for species should be ‘corrected’ because species are not phylogenetically independent. Here, we address these issues by identifying key types of questions in functional trait-based ecology and discussing the utility of phylogenetic information for answering them, either as a correction or in combination with functional traits. Phylogenetic analyses are identified as essential to answer questions related to the evolution of adaptations to abiotic and biotic conditions. However, we argue that phylogenetic information is not always relevant for functional trait studies, and should not be incorporated into ecological analyses without clear justification. Phylogenetic relatedness between species should not be considered a bias to be corrected, but rather an evolutionary signal that allows results to be interpreted at different evolutionary scales. Furthermore, if traits are conserved, phylogeny can be used as a proxy for missing information on traits and functional trait diversity. We conclude by providing guidelines on when to apply, and how to interpret, results obtained using phylogenetic information for a variety of ecological questions linked to functional traits.
Keywordsadaptation functional and phylogenetic diversity phylogenetically independent contrast response and effect traits limiting similarity ecosystem services
- de Bello F, Lavorel S, Díaz S, Harrington R, Cornelissen JHC, Bardgett RD, Berg MP, Cipriotti P, Feld CK, Hering D, da Silva PM, Potts SG, Sandin L, Sousa JP, Storkey J, Wardle DA, Harrison PA (2010) Towards an assessment of multiple ecosystem processes and services via functional traits. Biodivers & Conserv 19: 2873–2893CrossRefGoogle Scholar
- Götzenberger L, de Bello F, Brathen KA, Davison J, Dubuis A, Guisan A, Leps J, Lindborg R, Moora M, Pärtel M, Pellissier L, Pottier J, Vittoz P, Zobel K, Zobel M (2012) Ecological assembly rules in plant communities-approaches, patterns and prospects. Biol Rev (Cambridge) 87: 111–127CrossRefGoogle Scholar
- Hoffmann WA, Franco AC (2009) The importance of evolutionary history in studies of plant physiological ecology: examples from cerrados and forests of central Brazil. Brazil J Pl Physiol 20:247–256Google Scholar
- Swenson NG (2009) Phylogenetic Resolution and Quantifying the Phylogenetic Diversity and Dispersion of Communities. PloS ONE 4Google Scholar
- Swenson NG (2011) Phylogenetic Beta Diversity Metrics, Trait Evolution and Inferring the Functional Beta Diversity of Communities. PloS ONE 6Google Scholar