Trait Evolution in Adaptive Radiations: Modeling and Measuring Interspecific Competition on Phylogenies

The American Naturalist
Magnus ClarkeRobert P Freckleton

Abstract

The incorporation of ecological processes into models of trait evolution is important for understanding past drivers of evolutionary change. Species interactions have long been thought to be key drivers of trait evolution. However, models for comparative data that account for interactions between species are lacking. One of the challenges is that such models are intractable and difficult to express analytically. Here we present phylogenetic models of trait evolution that include interspecific competition among chosen species. Competition is modeled as a tendency of sympatric species to evolve toward difference from one another, producing trait overdispersion and high phylogenetic signal. The model predicts elevated trait variance across species and a slowdown in evolutionary rate both across the clade and within each branch. The model also predicts a reduction in correlation between otherwise correlated traits. We use an approximate Bayesian computation approach to estimate model parameters. We find reasonable power to detect competition in sufficiently large (20+ species) trees compared with Brownian trait evolution and with Ornstein-Uhlenbeck and early burst models. We apply the model to examine the evolution of bill morpholo...Continue Reading

Citations

Jun 9, 2017·Systematic Biology·Florent MazelMatthew W Pennell
Jun 15, 2017·Ecology Letters·Lee Hsiang LiowKjetil L Voje
Jun 26, 2018·Systematic Biology·Carolina L N CostaMarcus A M de Aguiar
Aug 23, 2018·Ecology Letters·A M ChiraG H Thomas
Oct 19, 2018·Proceedings. Biological Sciences·Ian G Brennan, J Scott Keogh
Jan 29, 2019·Evolution; International Journal of Organic Evolution·Graham J Slater, Anthony R Friscia
Dec 21, 2019·Systematic Biology·Ignacio Quintero, Michael J Landis
Apr 11, 2019·Journal of Evolutionary Biology·Luke J HarmonBlake Matthews
May 28, 2020·Proceedings of the National Academy of Sciences of the United States of America·Jonathan P DruryGregory F Grether
Oct 13, 2018·PeerJ·Alexandre AntonelliScott V Edwards
Jul 19, 2020·Systematic Biology·Pablo DuchenDaniele Silvestro
Sep 23, 2020·Systematic Biology·Liang XuRampal S Etienne
Nov 11, 2020·Proceedings. Biological Sciences·A M ChiraG H Thomas

Related Concepts

Metazoa
Bayesian Prediction
Biological Evolution
Phylogeny
Finches
Sympatric Species
Biological Evolution
Trees (plant)
Protein S
Branching (Qualifier Value)

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