Phylogenetic patterns of trait and trait plasticity evolution Insights from amphibian embryos

Environmental variation favors the evolution of phenotypic plasticity. For many species, we understand the costs and benefits of different phenotypes, but we lack a broad understanding of how plastic traits evolve across large clades. Using identical experiments conducted across North America, we ex...

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Vydáno v:	Evolution Ročník 72; číslo 3; s. 663 - 678
Hlavní autoři:	Relyea, Rick A., Stephens, Patrick R., Barrow, Lisa N., Blaustein, Andrew R., Bradley, Paul W., Buck, Julia C., Chang, Ann, Collins, James P., Crother, Brian, Earl, Julia, Gervasi, Stephanie S., Hoverman, Jason T., Hyman, Oliver, Lemmon, Emily Moriarty, Luhring, Thomas M., Michelson, Moses, Murray, Chris, Price, Steven, Semlitsch, Raymond D., Sih, Andrew, Stoler, Aaron B., VandenBroek, Nick, Warwick, Alexa, Wengert, Greta, Hammond, John I.
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	United States Wiley 01.03.2018 Oxford University Press
Témata:	Adaptation, Physiological Anaxyrus Animals Anura - growth & development Anura - physiology Astacoidea - chemistry Biological Evolution Brownian motion Crayfish Cues Embryo, Nonmammalian - physiology Embryos Evolution Food Chain Hyla Life history Life History Traits Lithobates Olfactory Perception ORIGINAL ARTICLE Phenotypic plasticity phylogenetic inertia Phylogenetics Phylogeny Plastic properties Plasticity Predators Prey Pseudacris Rana Reptiles & amphibians Species United States United States Anaxyrus Lithobates Pseudacris Hyla Rana phylogenetic inertia
ISSN:	0014-3820, 1558-5646, 1558-5646
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Shrnutí:	Environmental variation favors the evolution of phenotypic plasticity. For many species, we understand the costs and benefits of different phenotypes, but we lack a broad understanding of how plastic traits evolve across large clades. Using identical experiments conducted across North America, we examined prey responses to predator cues. We quantified five life-history traits and the magnitude of their plasticity for 23 amphibian species/populations (spanning three families and five genera) when exposed to no cues, crushed-egg cues, and predatory crayfish cues. Embryonic responses varied considerably among species and phylogenetic signal was common among the traits, whereas phylogenetic signal was rare for trait plasticities. Among traitevolution models, the Ornstein–Uhlenbeck (OU) model provided the best fit or was essentially tied with Brownian motion. Using the best fitting model, evolutionary rates for plasticities were higher than traits for three life-history traits and lower for two. These data suggest that the evolution of life-history traits in amphibian embryos is more constrained by a species’position in the phylogeny than is the evolution of life history plasticities. The fact that an OU model of trait evolution was often a good fit to patterns of trait variation may indicate adaptive optima for traits and their plasticities.
Bibliografie:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 content type line 23
ISSN:	0014-3820 1558-5646 1558-5646
DOI:	10.1111/evo.13428