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Transgenerational selection driven by divergent ecological impacts of hybridizing lineages [Nature Ecology & Evolution]

Keywords : biodiversity, ecosystem ecology, experimental evolution, freshwater ecology

par Frédéric Magné - publié le

Dynamic interactions between ecological conditions and the phenotypic composition of populations likely play an important role in evolution, but the direction and strength of these feedbacks remain difficult to characterize. We investigated these dynamics across two generations of threespine sticklebacks from two evolutionary lineages undergoing secondary contact and hybridization. Independently manipulating the density and lineage of adults in experimental mesocosms led to contrasting ecosystem conditions with strong effects on total survival in a subsequent generation of juveniles. Ecosystem modifications by adults also varied the strength of selection on competing hybrid and non-hybrid juveniles.(...)

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