Scale dependence of sex ratio in wild plant populations: implications for social selection

Brian Sanderson, Malcolm Augat, Douglas Taylor & Edmund Brodie
Social context refers to the composition of an individual’s social interactants, including potential mates. In spatially structured populations, social context can vary among individuals within populations, generating the opportunity for social selection to drive differences in fitness functions among individuals at a fine spatial scale. In sexually polymorphic plants, the local sex ratio varies at a fine scale and thus has the potential to generate this opportunity. We measured the spatial distribution of two wild populations of the gynodioecious plant Silene vulgaris...
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