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- W2770292165 abstract "Intraspecific variation is central to our understanding of evolution and ecology, but these fields generally consider either the mean trait value or its variance. Alternatively, the keystone individual concept from behavioral ecology posits that a single individual with an extreme phenotype can have disproportionate and irreplaceable effects on group dynamics. Here, I generalize this concept to include nonbehavioral traits and broader ecological and evolutionary dynamics. I test for the effects of individuals with extreme phenotypes on the ecology and evolution of a gall-forming fly and its natural enemies that select for opposite gall sizes. Specifically, I introduce a putatively keystone predator-attracting individual gall-maker, hypothesizing that the presence of such an individual should (1) increase gall maker population-level mortality, (2) cause consumer communities to be dominated by species that are most attracted to the keystone individual, (3) increase selection for traits conferring defense against the most common consumer, and (4) weaken patterns of stabilizing selection. I find support for both the ecological and evolutionary consequences of single individuals with extreme phenotypes, suggesting that they can be considered keystone individuals. I discuss the generality of the keystone individual concept, suggesting likely consequences for ecology and evolution." @default.
- W2770292165 created "2017-12-04" @default.
- W2770292165 creator A5054914435 @default.
- W2770292165 date "2018-02-01" @default.
- W2770292165 modified "2023-10-17" @default.
- W2770292165 title "Keystone Individuals Alter Ecological and Evolutionary Consumer-Resource Dynamics" @default.
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- W2770292165 doi "https://doi.org/10.1086/695322" @default.
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