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Bridging Inter- and Intraspecific Trait Evolution with a Hierarchical Bayesian Approach

Författare och institution:
A. Kostikova (-); Daniele Silvestro (Institutionen för biologi och miljövetenskap); P. B. Pearman (-); N. Salamin (-)
Publicerad i:
Systematic Biology, 65 ( 3 ) s. 417-431
Artikel, refereegranskad vetenskaplig
Sammanfattning (abstract):
The evolution of organisms is crucially dependent on the evolution of intraspecific variation. Its interactions with selective agents in the biotic and abiotic environments underlie many processes, such as intraspecific competition, resource partitioning and, eventually, species formation. Nevertheless, comparative models of trait evolution neither allow explicit testing of hypotheses related to the evolution of intraspecific variation nor do they simultaneously estimate rates of trait evolution by accounting for both trait mean and variance. Here, we present a model of phenotypic trait evolution using a hierarchical Bayesian approach that simultaneously incorporates interspecific and intraspecific variation. We assume that species-specific trait means evolve under a simple Brownian motion process, whereas species-specific trait variances are modeled with Brownian or Ornstein-Uhlenbeck processes. After evaluating the power of the method through simulations, we examine whether life-history traits impact evolution of intraspecific variation in the Eriogonoideae (buckwheat family, Polygonaceae). Our model is readily extendible to more complex scenarios of the evolution of inter-and intraspecific variation and presents a step toward more comprehensive comparative models for macroevolutionary studies.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
Geovetenskap och miljövetenskap
Comparative phylogenetics, hierarchical Bayesian model, intraspecific variance, macroevolution, geographic range evolution, mutation-selection balance, within-species, variation, phylogenetic inference, adaptive evolution, niche width, stabilizing selection, interspecific data, community ecology, model, Evolutionary Biology, ebbins gl, 1965, ecological monographs, v35, p1, ates of america, v51, p1207
Postens nummer:
Posten skapad:
2016-06-07 15:21

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